cabal-helper 0.8.2.0 → 1.0.0.0

raw patch · 63 files changed

+5392/−3509 lines, 63 filesdep +SHAdep +Win32dep +clockdep ~Cabaldep ~basedep ~bytestringPVP ok

version bump matches the API change (PVP)

Dependencies added: SHA, Win32, clock, semigroups, time

Dependency ranges changed: Cabal, base, bytestring, cabal-plan, containers, directory, filepath, ghc, pretty-show, process, template-haskell, temporary, transformers, unix

API changes (from Hackage documentation)

Files

• LICENSE +169/−641
• README.md +114/−18
• cabal-helper.cabal +125/−192
• lib/Distribution/Helper.hs +852/−590
• lib/Distribution/Helper/Discover.hs +96/−0
• os/posix/Symlink.hs +2/−0
• os/win/Symlink.hs +3/−0
• src/CabalHelper/Compiletime/Cabal.hs +291/−0
• src/CabalHelper/Compiletime/CompPrograms.hs +99/−0
• src/CabalHelper/Compiletime/Compat/Environment.hs +5/−10
• src/CabalHelper/Compiletime/Compat/Parsec.hs +36/−0
• src/CabalHelper/Compiletime/Compat/ProgramDb.hs +0/−30
• src/CabalHelper/Compiletime/Compat/Version.hs +5/−10
• src/CabalHelper/Compiletime/Compile.hs +246/−507
• src/CabalHelper/Compiletime/Data.hs +37/−17
• src/CabalHelper/Compiletime/Log.hs +18/−28
• src/CabalHelper/Compiletime/Process.hs +115/−0
• src/CabalHelper/Compiletime/Program/CabalInstall.hs +369/−0
• src/CabalHelper/Compiletime/Program/GHC.hs +155/−0
• src/CabalHelper/Compiletime/Program/Stack.hs +141/−0
• src/CabalHelper/Compiletime/Sandbox.hs +70/−0
• src/CabalHelper/Compiletime/Types.hs +577/−24
• src/CabalHelper/Compiletime/Types/RelativePath.hs +51/−0
• src/CabalHelper/Compiletime/Wrapper.hs +0/−227
• src/CabalHelper/Runtime/Compat.hs +228/−0
• src/CabalHelper/Runtime/HelperMain.hs +519/−0
• src/CabalHelper/Runtime/Main.hs +8/−833
• src/CabalHelper/Shared/Common.hs +56/−48
• src/CabalHelper/Shared/InterfaceTypes.hs +50/−39
• src/CabalHelper/Shared/Sandbox.hs +0/−78
• tests/CompileTest.hs +93/−116
• tests/Examples.hs +65/−0
• tests/GhcSession.hs +502/−101
• tests/ProgramsTest.hs +76/−0
• tests/ProjectTest.hs +7/−0
• tests/bkpregex/packages.list +1/−0
• tests/bkpregex/stack.yaml +3/−0
• tests/cabal-versions +58/−0
• tests/exeintlib/exeintlib.cabal +1/−0
• tests/exeintlib/packages.list +1/−0
• tests/exeintlib/stack.yaml +3/−0
• tests/exelib/exelib.cabal +1/−0
• tests/exelib/packages.list +1/−0
• tests/exelib/stack.yaml +3/−0
• tests/fliblib/fliblib.cabal +1/−0
• tests/fliblib/packages.list +1/−0
• tests/fliblib/stack.yaml +3/−0
• tests/multipkg/packages.list +4/−0
• tests/multipkg/pkg-oot/Exe.hs +1/−0
• tests/multipkg/pkg-oot/Lib.hs +2/−0
• tests/multipkg/pkg-oot/pkg-oot.cabal +24/−0
• tests/multipkg/proj/Exe.hs +1/−0
• tests/multipkg/proj/Lib.hs +2/−0
• tests/multipkg/proj/cabal.project +1/−0
• tests/multipkg/proj/pkg-a/Exe.hs +1/−0
• tests/multipkg/proj/pkg-a/Lib.hs +2/−0
• tests/multipkg/proj/pkg-a/pkg-a.cabal +24/−0
• tests/multipkg/proj/pkg-b/Exe.hs +1/−0
• tests/multipkg/proj/pkg-b/Lib.hs +2/−0
• tests/multipkg/proj/pkg-b/pkg-b.cabal +24/−0
• tests/multipkg/proj/proj.cabal +25/−0
• tests/multipkg/proj/stack.yaml +6/−0
• tests/stack-resolvers +15/−0

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@@ -1,25 +1,121 @@-# cabal-helper-[![build status](https://gitlab.com/dxld/cabal-helper/badges/master/build.svg)](https://gitlab.com/dxld/cabal-helper/commits/master)+# The `cabal-helper` library+[![build status](https://gitlab.com/dxld/cabal-helper/badges/master/pipeline.svg)](https://gitlab.com/dxld/cabal-helper/commits/master) -Cabal's little helper provides access to build information gathered by `cabal`-when configuring a project. Specifically we're interested in retrieving enough-information to bring up a compiler session, using the GHC API, which is similar-to running `cabal repl` in a project.+The purpose of the `cabal-helper` library is to give Haskell development+tools access to the same environment which build tools such as+[cabal](https://www.haskell.org/cabal) and+[stack](https://www.haskellstack.org) normally provide to the compiler. -While simple in principle this is complicated by the fact that the information-Cabal writes to disk is in an unstable format and only really accessible through-the Cabal API itself.+## Introduction -Since we do not want to bind the user of a development tool which utilises this-library to a specific version of Cabal we compile the code which interfaces with-the Cabal library's API on the user's machine, at runtime, against whichever-version of Cabal was used to write the on disk information for a given project.+In the Haskell ecosystem the most widely used [build system](#build-system) is+the [`Cabal` library](https://hackage.haskell.org/package/Cabal), not to be+confused with the `cabal` *build tool* which is usually refered to by it's+package-name: `cabal-install` to disambiguate. -If this version of Cabal is not available on the users machine anymore, which is-fairly likely since cabal-install is usually linked statically, we have support-for compiling the Cabal library also. In this case the library is installed into-a private, isolated, package database in `$XDG_CACHE_HOME/cabal-helper` so as to-not interfere with the user's package database.+All contemporary meta *build tools* such as `cabal` and `stack` as well as some+custom Haskell [build systems](#build-system) use the `Cabal` library as their+foundation. For example the Glasgow Haskell Compiler's bespoke GNU Make based+build system also utilises the `Cabal` library at its core.++We capitalize on this fact by using build information `Cabal` writes to disk as+the common denominator between all Haskell *build tools*. This allows us to+easily support a variety of *build tools* without incuring significant+additional complexity.++## Technical Background++### Haskell Packages and `Setup.hs`++Essentially all Haskell packages implement+["The Haskell Cabal" (pdf)](https://www.haskell.org/cabal/proposal/pkg-spec.pdf)+packaging specification. The `Cabal` library and `cabal-install` *build tool*+are named after this specification. Yes we really love confusing naming in+Haskell land.++The specification revolves around this `Setup.hs` script file you might+have seen before. Basically the idea is a Haskell source package consists+of, at the very least, a `Setup.hs` file, which is a Haskell program that+provides a well defined command-line interface for configuring, building+and installing it. Haskell developers can use *build tools*, such as+`cabal`, which interface with `Setup.hs` and provide functionality on top+it.++Note that even though originally packages were meant to be free to+implement the `Setup.hs` interface however they like, this hasn't been+supported by build tools for a long time. In practice use of the `Cabal`+library in `Setup.hs` is mandatory.++Now, the first step of building a package in "The Haskell Cabal" is to call+`Setup.hs`'s `configure` command:++    $ runhaskell Setup.hs configure++When invoking `Setup.hs` the default behaviour of the `Cabal` library is to+first read the `<pkg-name>.cabal` configuration file to determine how the+project is structured and what dependencies it has. In the case of+`configure` it will then probe the system it's running on about:++ - the list of available Haskell packages,+ - system package dependencies (using pkg-config) and+ - Haskell compiler type, version and supported language extensions (among+   other things).++Finally Haskell package dependency resolution is also run.+ +`Cabal` then writes all the gathered information on the concrete+configuration of the package into a file called `setup-config`. Subsequent+steps, such as`runhaskell Setup.hs build`, will then read this state file+instead of `<package-name>.cabal` to avoid having to probe the system or+run dependency resolution again.++It is this file that `cabal-helper` is primarily concerned with reading and+presenting in a usable manner. Reading this file essentially means that all+the complicated work has already been done for us and we can get straight+to running the compiler.++### Multi-package projects++So far so good. That's pretty much the end of the story for the traditional+`cabal build` commands but what about `cabal new-build` and Stack I hear+you asking?++Well, essentially both new-build and Stack simply build on top of the+traditional `Setup.hs` interface. So the `setup-config` file is still there+in all it's glory, we just have to deal with more than one of it since both+build-tools support multiple packages and `Setup.hs` only knows how to deal+with a single package at a time.++To support this cabal-helper has grown a representation of what a project+is in it's API starting with the 1.0 series. We currently support both+new-build and Stack. The API is designed to allow extending support to+custom build systems such as GHC's but we have not done this yet.++### The "Helper" in cabal-helper++In the API docs you will find frequent mentions of "the helper executable"+so I'll explain what that is here because it is quite fundamental to how+things work in the codebase.++The fundamental problem cabal-helper solves is the fact that in order to+access the data Cabal stores in the `setup-config` file we have to link+against `lib:Cabal`. However the binary format of this file is unstable and+there is no backwards compatibility mechanism in the library. So to read a+`setup-config` file produced by a certain version of Cabal we have to link+against exactly that version.++Not only that but usally the `cabal` commandline tool controls which Cabal+library version is used, so we really just have to deal with whatever we+get.++To solve this problem the cabal-helper library builds a small executable at+runtime who's only purpose is to link against `lib:Cabal`, read the+contents of `setup-config` and present the data there in a Cabal version+independent format for consumption by the cabal-helper library.++Recently some work was merged into cabal to have `Setup.hs` to do this+natively (https://github.com/haskell/cabal/pull/5954), we're planning to+use this eventually to replace our "helper".  ## IRC 

@@ -1,62 +1,67 @@+cabal-version:       2.2 name:                cabal-helper-version:             0.8.2.0+version:             1.0.0.0 synopsis:- Simple interface to some of Cabal's configuration state, mainly used by ghc-mod+ Give Haskell development tools access to Cabal project environment description:-    Cabal's little helper provides access to build information gathered by-    @cabal@ when configuring a project. Specifically we're interested in-    retrieving enough information to bring up a compiler session, using the GHC-    API, which is similar to running @cabal repl@ in a project.-    .-    While simple in principle this is complicated by the fact that the-    information Cabal writes to disk is in an unstable format and only really-    accessible through the Cabal API itself.-    .-    Since we do not want to bind the user of a development tool which utilises-    this library to a specific version of Cabal we compile the code which-    interfaces with the Cabal library's API on the user's machine, at runtime,-    against whichever version of Cabal was used to write the on disk information-    for a given project.-    .-    If this version of Cabal is not available on the users machine anymore,-    which is fairly likely since cabal-install is usually linked statically, we-    have support for compiling the Cabal library also. In this case the library-    is installed into a private, isolated, package database in-    @$XDG_CACHE_HOME/cabal-helper@ so as to not interfere with the user's-    package database.-license:             GPL-3+ The purpose of the @cabal-helper@ library is to give Haskell development+ tools access to the same environment which build tools such as @cabal@ and+ @stack@ normally provide to the compiler.+license:             Apache-2.0 license-file:        LICENSE author:              Daniel Gröber <cabal-helper@dxld.at> maintainer:          cabal-helper@dxld.at category:            Distribution-build-type:          Custom-cabal-version:       2.0+build-type:          Simple extra-source-files:  README.md                      src/CabalHelper/Runtime/*.hs                       tests/*.hs+                     tests/stack-resolvers+                     tests/cabal-versions                       tests/exelib/*.hs                      tests/exelib/*.cabal+                     tests/exelib/packages.list+                     tests/exelib/stack.yaml                      tests/exelib/lib/*.hs                       tests/exeintlib/*.hs                      tests/exeintlib/*.cabal+                     tests/exeintlib/packages.list+                     tests/exeintlib/stack.yaml                      tests/exeintlib/lib/*.hs                      tests/exeintlib/intlib/*.hs                       tests/fliblib/*.hs                      tests/fliblib/*.cabal+                     tests/fliblib/packages.list+                     tests/fliblib/stack.yaml                      tests/fliblib/lib/*.hs -                     tests/bkpregex/*.cabal                      tests/bkpregex/*.hs+                     tests/bkpregex/*.cabal+                     tests/bkpregex/packages.list+                     tests/bkpregex/stack.yaml                      tests/bkpregex/regex-example/*.hs                      tests/bkpregex/regex-indef/*.hs                      tests/bkpregex/regex-indef/*.hsig                      tests/bkpregex/regex-types/Regex/*.hs                      tests/bkpregex/str-impls/Str/*.hs +                     tests/multipkg/packages.list+                     tests/multipkg/pkg-oot/*.cabal+                     tests/multipkg/pkg-oot/*.hs+                     tests/multipkg/proj/*.cabal+                     tests/multipkg/proj/*.hs+                     tests/multipkg/proj/cabal.project+                     tests/multipkg/proj/pkg-a/*.cabal+                     tests/multipkg/proj/pkg-a/*.hs+                     tests/multipkg/proj/pkg-b/*.cabal+                     tests/multipkg/proj/pkg-b/*.hs+                     tests/multipkg/proj/stack.yaml++ source-repository head   type:     git   location: https://github.com/DanielG/cabal-helper.git@@ -66,202 +71,129 @@   default:     False   manual:      True -custom-setup-  setup-depends:       base-                     , Cabal          < 3 && >= 2.0.0.0 --- [Note test dependencies] Vaious tests need access to modules used in other--- components, unfortunately we can't use Cabal 2.0's new internal libraries for--- this because we'd like to support ancient Cabal versions. Instead we just--- copy 'hs-source-dirs', 'build-depends' and 'other-modules' fields as--- appropriate.------ The following awk command will copy paragraphs starting with:---     -- Common some-name--- to following paragraphs starting with:---     -- Instantiate common some-name------ $ gawk -i inplace -f scripts/update-cabal-common-section-instantiations.awk cabal-helper.cabal------ FIXME: We can use Cabal 2.0 features now, yey!--library+common extensions   default-language:    Haskell2010   default-extensions:  NondecreasingIndentation-  hs-source-dirs:      lib, src-  exposed-modules:     Distribution.Helper-  other-modules:-                       CabalHelper.Shared.InterfaceTypes-                       CabalHelper.Shared.Sandbox-                       Paths_cabal_helper-  autogen-modules:     Paths_cabal_helper--  ghc-options:         -Wall--  -- well actually this is a "runtime"-tool-depends :)-  build-tool-depends:  cabal-helper:cabal-helper-wrapper+                       ImplicitParams+                       NamedFieldPuns RecordWildCards+                       FlexibleContexts+                       ConstraintKinds+  other-extensions:    TemplateHaskell -  build-depends:       base             < 5    && >= 4.7-  build-depends:       Cabal            < 2.5  && >= 2.0     || < 1.26 && >= 1.14-                     , cabal-plan       < 0.5  && >= 0.3.0.0-                     , containers       < 1    && >= 0.5.5.1-                     , directory        < 1.4  && >= 1.2.1.0-                     , filepath         < 1.5  && >= 1.3.0.0-                     , transformers     < 0.6  && >= 0.3.0.0+common build-deps+  build-depends:       base             < 5    && >= 4.9.1.0+                     , Cabal            < 3.1  && >= 3.0+                                     || < 2.5  && >= 2.0+                                     || < 1.26 && >= 1.24.2.0+                     , cabal-plan       < 0.6  && >= 0.5.0.0+                     , clock            < 0.8  && >= 0.7.2+                     , containers       < 1    && >= 0.5.7.1+                     , bytestring       < 0.11 && >= 0.10.8.1+                     , directory        < 1.4  && >= 1.3.0.0+                     , filepath         < 1.5  && >= 1.4.1.1                      , mtl              < 2.3  && >= 2.0-                     , process          < 1.7  && >= 1.1.0.1-  if !os(windows)-    build-depends:     unix             < 2.8  && >= 2.5.1.1-  build-depends:       unix-compat      < 0.6  && >= 0.4.3.1+                     , process          < 1.7  && >= 1.4.3.0+                     , semigroups       < 0.19 && >= 0.18                      , semigroupoids    < 5.4  && >= 5.2--+                     , SHA              < 1.7  && >= 1.6.4.4+                     , text             < 1.3  && >= 1.0.0.0+                     , template-haskell < 2.15 && >= 2.11.1.0+                     , temporary        < 1.3  && >= 1.2.1+                     , time             < 1.9  && >= 1.6.0.1+                     , transformers     < 0.6  && >= 0.5.2.0+                     , utf8-string      < 1.1  && >= 1.0.1.1+  if os(windows)+    build-depends:     Win32            < 2.9  && >= 2.5.4.1+  else+    build-depends:     unix             < 2.8  && >= 2.7.2.1+  build-depends:       unix-compat      < 0.6  && >= 0.4.3.1 -executable cabal-helper-wrapper-  main-is:             CabalHelper/Compiletime/Wrapper.hs   if flag(dev)-    ghc-options:         -Wall-  scope:               private+    ghc-options:       -Wall -  -- Common c-h-wrapper-fields -- See [Note test dependencies]-  default-language:    Haskell2010-  default-extensions:  NondecreasingIndentation-  other-extensions:    TemplateHaskell-  hs-source-dirs:      src-  other-modules:++library c-h-internal+  import:             build-deps, extensions+  exposed-modules:+                       CabalHelper.Compiletime.Cabal+                       CabalHelper.Compiletime.CompPrograms                        CabalHelper.Compiletime.Compat.Environment-                       CabalHelper.Compiletime.Compat.ProgramDb                        CabalHelper.Compiletime.Compat.Version+                       CabalHelper.Compiletime.Compat.Parsec                        CabalHelper.Compiletime.Compile                        CabalHelper.Compiletime.Data                        CabalHelper.Compiletime.Log+                       CabalHelper.Compiletime.Process+                       CabalHelper.Compiletime.Program.CabalInstall+                       CabalHelper.Compiletime.Program.Stack+                       CabalHelper.Compiletime.Program.GHC+                       CabalHelper.Compiletime.Sandbox                        CabalHelper.Compiletime.Types+                       CabalHelper.Compiletime.Types.RelativePath+                       CabalHelper.Runtime.Compat+                       CabalHelper.Runtime.HelperMain                        CabalHelper.Shared.Common                        CabalHelper.Shared.InterfaceTypes-                       CabalHelper.Shared.Sandbox+  other-modules:                        Paths_cabal_helper-  build-tool-depends:  cabal-install:cabal-  build-depends:       base             < 5    && >= 4.7+  autogen-modules:+                       Paths_cabal_helper+  exposed-modules:+                       Symlink   if os(windows)-    build-depends:     base                       >= 4.7-  build-depends:       Cabal            < 2.5  && >= 2.0 || < 1.26 && >= 1.14-                     , cabal-plan       < 0.5  && >= 0.3.0.0-                     , containers       < 1    && >= 0.5.5.1-                     , bytestring       < 0.11 && >= 0.9.2.1-                     , directory        < 1.4  && >= 1.2.1.0-                     , filepath         < 1.5  && >= 1.3.0.0-                     , mtl              < 2.3  && >= 2.0-                     , process          < 1.7  && >= 1.1.0.1-                     , pretty-show      < 1.9  && >= 1.7-                     , text             < 1.3  && >= 1.0.0.0-                     , template-haskell < 2.15 && >= 2.7.0.0-                     , temporary        < 1.4  && >= 1.2.1-                     , transformers     < 0.6  && >= 0.3.0.0-  if !os(windows)-    build-depends:     unix             < 2.8  && >= 2.5.1.1-  build-depends:       unix-compat      < 0.6  && >= 0.4.3.1-                     , utf8-string      < 1.1  && >= 1.0.1.1-  build-tools:         cabal+    hs-source-dirs:    os/win+  else+    hs-source-dirs:    os/posix+  hs-source-dirs:      src +library+  import:              build-deps, extensions+  exposed-modules:     Distribution.Helper+                       Distribution.Helper.Discover+  other-modules:+                       Paths_cabal_helper+  autogen-modules:+                       Paths_cabal_helper+  hs-source-dirs:      lib+  build-depends:       c-h-internal  test-suite compile-test+  import:              build-deps, extensions   type:                exitcode-stdio-1.0   main-is:             CompileTest.hs   hs-source-dirs:      tests   ghc-options:         -Wall-  build-tools:         cabal--  -- Instantiate common c-h-wrapper-fields -- See [Note test dependencies]-  default-language:    Haskell2010-  default-extensions:  NondecreasingIndentation-  other-extensions:    TemplateHaskell-  hs-source-dirs:      src-  other-modules:-                       CabalHelper.Compiletime.Compat.Environment-                       CabalHelper.Compiletime.Compat.ProgramDb-                       CabalHelper.Compiletime.Compat.Version-                       CabalHelper.Compiletime.Compile-                       CabalHelper.Compiletime.Data-                       CabalHelper.Compiletime.Log-                       CabalHelper.Compiletime.Types-                       CabalHelper.Shared.Common-                       CabalHelper.Shared.InterfaceTypes-                       CabalHelper.Shared.Sandbox-                       Paths_cabal_helper-  build-tool-depends:  cabal-install:cabal-  build-depends:       base             < 5    && >= 4.7-  if os(windows)-    build-depends:     base                       >= 4.7-  build-depends:       Cabal            < 2.5  && >= 2.0 || < 1.26 && >= 1.14-                     , cabal-plan       < 0.5  && >= 0.3.0.0-                     , containers       < 1    && >= 0.5.5.1-                     , bytestring       < 0.11 && >= 0.9.2.1-                     , directory        < 1.4  && >= 1.2.1.0-                     , filepath         < 1.5  && >= 1.3.0.0-                     , mtl              < 2.3  && >= 2.0-                     , process          < 1.7  && >= 1.1.0.1-                     , pretty-show      < 1.9  && >= 1.7-                     , text             < 1.3  && >= 1.0.0.0-                     , template-haskell < 2.15 && >= 2.7.0.0-                     , temporary        < 1.4  && >= 1.2.1-                     , transformers     < 0.6  && >= 0.3.0.0-  if !os(windows)-    build-depends:     unix             < 2.8  && >= 2.5.1.1-  build-depends:       unix-compat      < 0.6  && >= 0.4.3.1-                     , utf8-string      < 1.1  && >= 1.0.1.1-  build-tools:         cabal+  build-depends:       c-h-internal +test-suite programs-test+  import:              build-deps, extensions+  type:                exitcode-stdio-1.0+  main-is:             ProgramsTest.hs+  hs-source-dirs:      tests+  ghc-options:         -Wall+  build-depends:       c-h-internal+                     , pretty-show  test-suite ghc-session+  import:              build-deps, extensions   type:                exitcode-stdio-1.0   main-is:             GhcSession.hs   hs-source-dirs:      tests   ghc-options:         -Wall-  build-depends:       base             < 5    && >= 4.7-                     , ghc              < 8.7  && >= 7.8+  build-depends:       ghc              < 8.7  && >= 8.0.2                      , ghc-paths        < 0.2  && >= 0.1.0.9+                     , pretty-show      < 1.9  && >= 1.8.1                      , cabal-helper--  -- Instantiate common c-h-wrapper-fields -- See [Note test dependencies]-  default-language:    Haskell2010-  default-extensions:  NondecreasingIndentation-  other-extensions:    TemplateHaskell-  hs-source-dirs:      src-  other-modules:-                       CabalHelper.Compiletime.Compat.Environment-                       CabalHelper.Compiletime.Compat.ProgramDb-                       CabalHelper.Compiletime.Compat.Version-                       CabalHelper.Compiletime.Compile-                       CabalHelper.Compiletime.Data-                       CabalHelper.Compiletime.Log-                       CabalHelper.Compiletime.Types-                       CabalHelper.Shared.Common-                       CabalHelper.Shared.InterfaceTypes-                       CabalHelper.Shared.Sandbox-                       Paths_cabal_helper-  build-tool-depends:  cabal-install:cabal-  build-depends:       base             < 5    && >= 4.7-  if os(windows)-    build-depends:     base                       >= 4.7-  build-depends:       Cabal            < 2.5  && >= 2.0 || < 1.26 && >= 1.14-                     , cabal-plan       < 0.5  && >= 0.3.0.0-                     , containers       < 1    && >= 0.5.5.1-                     , bytestring       < 0.11 && >= 0.9.2.1-                     , directory        < 1.4  && >= 1.2.1.0-                     , filepath         < 1.5  && >= 1.3.0.0-                     , mtl              < 2.3  && >= 2.0-                     , process          < 1.7  && >= 1.1.0.1-                     , pretty-show      < 1.9  && >= 1.7-                     , text             < 1.3  && >= 1.0.0.0-                     , template-haskell < 2.15 && >= 2.7.0.0-                     , temporary        < 1.4  && >= 1.2.1-                     , transformers     < 0.6  && >= 0.3.0.0-  if !os(windows)-    build-depends:     unix             < 2.8  && >= 2.5.1.1-  build-depends:       unix-compat      < 0.6  && >= 0.4.3.1-                     , utf8-string      < 1.1  && >= 1.0.1.1-  build-tools:         cabal+                     , c-h-internal +test-suite examples+  import:              build-deps, extensions+  type:                exitcode-stdio-1.0+  main-is:             Examples.hs+  hs-source-dirs:      tests+  ghc-options:         -Wall+  build-depends:       cabal-helper  executable cabal-helper-main   default-language:    Haskell2010@@ -269,20 +201,21 @@   main-is:             CabalHelper/Runtime/Main.hs   hs-source-dirs:      src   other-modules:+                       CabalHelper.Runtime.HelperMain+                       CabalHelper.Runtime.Compat                        CabalHelper.Shared.Common                        CabalHelper.Shared.InterfaceTypes-                       CabalHelper.Shared.Sandbox+                       CabalHelper.Shared.Common -  -- This component is usually built at runtime by cabal-helper-wrapper but-  -- during development it's convinient to build it via cabal+  -- This component is usually built at runtime but during development it's+  -- convinient to build it via cabal   if flag(dev)     buildable:         True   else     buildable:         False -  -- Common c-h-main-fields -- See [Note test dependencies]   ghc-options:         -Wall -fno-warn-unused-imports-  build-depends:       base             < 5    && >= 4.7+  build-depends:       base             < 5    && >= 4.9.1.0                      , Cabal                      , containers                      , bytestring

@@ -1,591 +1,853 @@ -- cabal-helper: Simple interface to Cabal's configuration state--- Copyright (C) 2015-2018  Daniel Gröber <cabal-helper@dxld.at>------ This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- (at your option) any later version.------ This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.------ You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.--{-# LANGUAGE CPP, RecordWildCards, FlexibleContexts, ConstraintKinds,-  GeneralizedNewtypeDeriving, DeriveDataTypeable, DeriveGeneric, DeriveFunctor,-  NamedFieldPuns, OverloadedStrings- #-}--{-|-Module      : Distribution.Helper-License     : GPL-3-Maintainer  : cabal-helper@dxld.at-Portability : POSIX--}--module Distribution.Helper (-  -- * Running Queries-    Query-  , runQuery--  -- * Queries against Cabal\'s on disk state--  -- ** Package queries-  , packageId-  , packageDbStack-  , packageFlags-  , compilerVersion--  , ghcMergedPkgOptions--  -- ** cabal-install queries-  , configFlags-  , nonDefaultConfigFlags---  -- ** Component queries-  , ComponentQuery-  , components--  , ghcSrcOptions-  , ghcPkgOptions-  , ghcLangOptions-  , ghcOptions-  , sourceDirs-  , entrypoints-  , needsBuildOutput--  -- * Query environment-  , QueryEnv-  , mkQueryEnv-  , qeReadProcess-  , qePrograms-  , qeProjectDir-  , qeDistDir-  , qeCabalPkgDb-  , qeCabalVer--  , Programs(..)-  , defaultPrograms---  -- * Result types-  , ChModuleName(..)-  , ChComponentName(..)-  , ChPkgDb(..)-  , ChEntrypoint(..)-  , NeedsBuildOutput(..)--  -- * General information-  , buildPlatform--  -- * Stuff that cabal-install really should export-  , Distribution.Helper.getSandboxPkgDb--  -- * Managing @dist/@-  , prepare-  , reconfigure-  , writeAutogenFiles--  -- * $libexec related error handling-  , LibexecNotFoundError(..)-  , libexecNotFoundError--  -- * Reexports-  , module Data.Functor.Apply-  ) where--import Cabal.Plan-import Control.Applicative-import Control.Monad-import Control.Monad.IO.Class-import Control.Monad.State.Strict-import Control.Monad.Reader-import Control.Exception as E-import Data.Char-import Data.List-import Data.Maybe-import qualified Data.Map as Map-import Data.Version-import Data.Typeable-import Data.Function-import Data.Functor.Apply-import Distribution.System (buildOS, OS(Windows))-import System.Environment-import System.FilePath hiding ((<.>))-import qualified System.FilePath as FP-import System.Directory-import System.Process-import System.IO.Unsafe-import Text.Printf-import GHC.Generics-import Prelude--import Paths_cabal_helper (getLibexecDir)-import CabalHelper.Shared.InterfaceTypes-import CabalHelper.Shared.Sandbox---- | Paths or names of various programs we need.-data Programs = Programs {-      -- | The path to the @cabal@ program.-      cabalProgram  :: FilePath,--      -- | The path to the @ghc@ program.-      ghcProgram    :: FilePath,--      -- | The path to the @ghc-pkg@ program. If-      -- not changed it will be derived from the path to 'ghcProgram'.-      ghcPkgProgram :: FilePath-    } deriving (Eq, Ord, Show, Read, Generic, Typeable)---- | Default all programs to their unqualified names, i.e. they will be searched--- for on @PATH@.-defaultPrograms :: Programs-defaultPrograms = Programs "cabal" "ghc" "ghc-pkg"---- | Environment for running a 'Query'. The real constructor is not exposed,--- the field accessors are however. See below. Use the 'mkQueryEnv' smart--- constructor to construct one.-data QueryEnv = QueryEnv {-      -- | Field accessor for 'QueryEnv'. Defines how to start the cabal-helper-      --  process. Useful if you need to capture stderr output from the helper.-      qeReadProcess :: FilePath -> [String] -> String -> IO String,--      -- | Field accessor for 'QueryEnv'.-      qePrograms    :: Programs,--      -- | Field accessor for 'QueryEnv'. Defines path to the project directory,-      -- i.e. a directory containing a @project.cabal@ file-      qeProjectDir  :: FilePath,---      -- | Field accessor for 'QueryEnv'. Defines path to the @dist/@ directory,-      -- /builddir/ in Cabal terminology.-      qeDistDir     :: FilePath,--      -- | Field accessor for 'QueryEnv'. Defines where to look for the Cabal-      -- library when linking the helper.-      qeCabalPkgDb  :: Maybe FilePath,--      -- | Field accessor for 'QueryEnv'. If @dist/setup-config@ wasn\'t written-      -- by this version of Cabal an error is thrown when running the query.-      qeCabalVer    :: Maybe Version-    }---- | @mkQueryEnv projdir distdir@. Smart constructor for 'QueryEnv'.--- Sets fields 'qeProjectDir' and 'qeDistDir' to @projdir@ and @distdir@--- respectively and provides sensible defaults for the other fields.-mkQueryEnv :: FilePath-           -- ^ Path to the project directory, i.e. the directory containing a-           -- @project.cabal@ file-           -> FilePath-           -- ^ Path to the @dist/@ directory, called /builddir/ in Cabal-           -- terminology.-           -> QueryEnv-mkQueryEnv projdir distdir = QueryEnv {-    qeReadProcess = readProcess-  , qePrograms    = defaultPrograms-  , qeProjectDir  = projdir-  , qeDistDir     = distdir-  , qeCabalPkgDb  = Nothing-  , qeCabalVer    = Nothing-  }--data SomeLocalBuildInfo = SomeLocalBuildInfo {-      slbiPackageDbStack      :: [ChPkgDb],-      slbiPackageFlags        :: [(String, Bool)],-      slbiCompilerVersion     :: (String, Version),--      slbiGhcMergedPkgOptions :: [String],--      slbiConfigFlags         :: [(String, Bool)],-      slbiNonDefaultConfigFlags :: [(String, Bool)],--      slbiGhcSrcOptions       :: [(ChComponentName, [String])],-      slbiGhcPkgOptions       :: [(ChComponentName, [String])],-      slbiGhcLangOptions      :: [(ChComponentName, [String])],-      slbiGhcOptions          :: [(ChComponentName, [String])],--      slbiSourceDirs          :: [(ChComponentName, [String])],-      slbiEntrypoints         :: [(ChComponentName, ChEntrypoint)],-      slbiNeedsBuildOutput    :: [(ChComponentName, NeedsBuildOutput)]-    } deriving (Eq, Ord, Read, Show)---- | A lazy, cached, query against a package's Cabal configuration. Use--- 'runQuery' to execute it.-newtype Query m a = Query { unQuery :: StateT (Maybe SomeLocalBuildInfo)-                                         (ReaderT QueryEnv m) a }-    deriving (Functor, Applicative, Monad, MonadIO)--instance MonadTrans Query where-    lift = Query . lift . lift--type MonadQuery m = ( MonadIO m-                    , MonadState (Maybe SomeLocalBuildInfo) m-                    , MonadReader QueryEnv m)---- | A 'Query' to run on all components of a package. Use 'components' to get a--- regular 'Query'.-newtype ComponentQuery m a = ComponentQuery (Query m [(ChComponentName, a)])-    deriving (Functor)--instance (Functor m, Monad m) => Apply (ComponentQuery m) where-    ComponentQuery flab <.> ComponentQuery fla =-        ComponentQuery $ liftM2 go flab fla-      where-        go :: [(ChComponentName, a -> b)]-           -> [(ChComponentName, a)]-           -> [(ChComponentName, b)]-        go lab la =-            [ (cn, ab a)-            | (cn,  ab) <- lab-            , (cn', a)  <- la-            , cn == cn'-            ]--run :: Monad m => QueryEnv -> Maybe SomeLocalBuildInfo -> Query m a -> m a-run e s action = flip runReaderT e (flip evalStateT s (unQuery action))---- | @runQuery env query@. Run a 'Query' under a given 'QueryEnv'.-runQuery :: Monad m-         => QueryEnv-         -> Query m a-         -> m a-runQuery qe action = run qe Nothing action--getSlbi :: MonadQuery m => m SomeLocalBuildInfo-getSlbi = do-  s <- get-  case s of-    Nothing -> do-            slbi <- getSomeConfigState-            put (Just slbi)-            return slbi-    Just slbi -> return slbi---- | List of package databases to use.-packageDbStack :: MonadIO m => Query m [ChPkgDb]---- | Like @ghcPkgOptions@ but for the whole package not just one component-ghcMergedPkgOptions :: MonadIO m => Query m [String]---- | Flag definitions from cabal file-packageFlags :: MonadIO m => Query m [(String, Bool)]---- | Flag assignments from setup-config-configFlags :: MonadIO m => Query m [(String, Bool)]---- | Flag assignments from setup-config which differ from the default--- setting. This can also include flags which cabal decided to modify,--- i.e. don't rely on these being the flags set by the user directly.-nonDefaultConfigFlags :: MonadIO m => Query m [(String, Bool)]---- | The version of GHC the project is configured to use-compilerVersion :: MonadIO m => Query m (String, Version)---- | Package identifier, i.e. package name and version-packageId :: MonadIO m => Query m (String, Version)---- | Run a ComponentQuery on all components of the package.-components :: Monad m => ComponentQuery m (ChComponentName -> b) -> Query m [b]-components (ComponentQuery sc) = map (\(cn, f) -> f cn) `liftM` sc---- | Modules or files Cabal would have the compiler build directly. Can be used--- to compute the home module closure for a component.-entrypoints   :: MonadIO m => ComponentQuery m ChEntrypoint---- | The component has a non-default module renaming, so needs build output ().-needsBuildOutput :: MonadIO m => ComponentQuery m NeedsBuildOutput---- | A component's @source-dirs@ field, beware since if this is empty implicit--- behaviour in GHC kicks in.-sourceDirs    :: MonadIO m => ComponentQuery m [FilePath]---- | All options Cabal would pass to GHC.-ghcOptions    :: MonadIO m => ComponentQuery m [String]---- | Only search path related GHC options.-ghcSrcOptions :: MonadIO m => ComponentQuery m [String]---- | Only package related GHC options, sufficient for things don't need to--- access any home modules.-ghcPkgOptions :: MonadIO m => ComponentQuery m [String]---- | Only language related options, i.e. @-XSomeExtension@-ghcLangOptions :: MonadIO m => ComponentQuery m [String]--packageId             = Query $ getPackageId-packageDbStack        = Query $ slbiPackageDbStack        `liftM` getSlbi-packageFlags          = Query $ slbiPackageFlags          `liftM` getSlbi-compilerVersion       = Query $ slbiCompilerVersion       `liftM` getSlbi-ghcMergedPkgOptions   = Query $ slbiGhcMergedPkgOptions   `liftM` getSlbi-configFlags           = Query $ slbiConfigFlags           `liftM` getSlbi-nonDefaultConfigFlags = Query $ slbiNonDefaultConfigFlags `liftM` getSlbi--ghcSrcOptions    = ComponentQuery $ Query $ slbiGhcSrcOptions    `liftM` getSlbi-ghcPkgOptions    = ComponentQuery $ Query $ slbiGhcPkgOptions    `liftM` getSlbi-ghcOptions       = ComponentQuery $ Query $ slbiGhcOptions       `liftM` getSlbi-ghcLangOptions   = ComponentQuery $ Query $ slbiGhcLangOptions   `liftM` getSlbi-sourceDirs       = ComponentQuery $ Query $ slbiSourceDirs       `liftM` getSlbi-entrypoints      = ComponentQuery $ Query $ slbiEntrypoints      `liftM` getSlbi-needsBuildOutput = ComponentQuery $ Query $ slbiNeedsBuildOutput `liftM` getSlbi---- | Run @cabal configure@-reconfigure :: MonadIO m-            => (FilePath -> [String] -> String -> IO String)-            -> Programs -- ^ Program paths-            -> [String] -- ^ Command line arguments to be passed to @cabal@-            -> m ()-reconfigure readProc progs cabalOpts = do-    let progOpts =-            [ "--with-ghc=" ++ ghcProgram progs ]-            -- Only pass ghc-pkg if it was actually set otherwise we-            -- might break cabal's guessing logic-            ++ if ghcPkgProgram progs /= "ghc-pkg"-                 then [ "--with-ghc-pkg=" ++ ghcPkgProgram progs ]-                 else []-            ++ cabalOpts-    _ <- liftIO $ readProc (cabalProgram progs) ("configure":progOpts) ""-    return ()--readHelper :: (MonadIO m, MonadQuery m) => [String] -> m [Maybe ChResponse]-readHelper args = ask >>= \qe -> liftIO $ do-  out <- either error id <$> invokeHelper qe args-  let res = read out-  liftIO $ evaluate res `E.catch` \se@(SomeException _) -> do-      md <- lookupEnv' "CABAL_HELPER_DEBUG"-      let msg = "readHelper: exception: '" ++ show se ++ "'"-      error $ msg ++ case md of-        Nothing -> ", for more information set the environment variable CABAL_HELPER_DEBUG"-        Just _ -> ", output: '"++ out ++"'"--invokeHelper :: QueryEnv -> [String] -> IO (Either String String)-invokeHelper QueryEnv {..} args = do-  let progArgs = [ "--with-ghc="     ++ ghcProgram qePrograms-                 , "--with-ghc-pkg=" ++ ghcPkgProgram qePrograms-                 , "--with-cabal="   ++ cabalProgram qePrograms-                 ]-  exe  <- findLibexecExe-  let args' = progArgs ++ "v1-style":qeProjectDir:qeDistDir:args-  out <- qeReadProcess exe args' ""-  (Right <$> evaluate out) `E.catch` \(SomeException _) ->-      return $ Left $ concat-                 ["invokeHelper", ": ", exe, " "-                 , intercalate " " (map show args')-                 , " failed"-                 ]--getPackageId :: MonadQuery m => m (String, Version)-getPackageId = ask >>= \QueryEnv {..} -> do-  pkgId <- readHelper [ "package-id" ]-  case pkgId of-    [ Just (ChResponseVersion pkgName pkgVer) ] -> return (pkgName, pkgVer)-    _ -> error "getPackageId: unexpected response"--getSomeConfigState :: MonadQuery m => m SomeLocalBuildInfo-getSomeConfigState = ask >>= \QueryEnv {..} -> do-  res <- readHelper-         [ "package-db-stack"-         , "flags"-         , "compiler-version"--         , "ghc-merged-pkg-options"--         , "config-flags"-         , "non-default-config-flags"--         , "ghc-src-options"-         , "ghc-pkg-options"-         , "ghc-lang-options"-         , "ghc-options"--         , "source-dirs"-         , "entrypoints"-         , "needs-build-output"-         ]-  let [ Just (ChResponsePkgDbs      slbiPackageDbStack),-        Just (ChResponseFlags       slbiPackageFlags),-        Just (ChResponseVersion     comp compVer),--        Just (ChResponseList        slbiGhcMergedPkgOptions),--        Just (ChResponseFlags       slbiConfigFlags),-        Just (ChResponseFlags       slbiNonDefaultConfigFlags),--        Just (ChResponseCompList    slbiGhcSrcOptions),-        Just (ChResponseCompList    slbiGhcPkgOptions),-        Just (ChResponseCompList    slbiGhcLangOptions),-        Just (ChResponseCompList    slbiGhcOptions),--        Just (ChResponseCompList    slbiSourceDirs),-        Just (ChResponseEntrypoints slbiEntrypoints),-        Just (ChResponseNeedsBuild  slbiNeedsBuildOutput)-        ] = res-      slbiCompilerVersion = (comp, compVer)-  return $ SomeLocalBuildInfo {..}----- | Make sure the appropriate helper executable for the given project is--- installed and ready to run queries.-prepare :: MonadIO m => QueryEnv -> m ()-prepare qe =-  liftIO $ void $ invokeHelper qe []---- | Create @cabal_macros.h@ and @Paths_\<pkg\>@ possibly other generated files--- in the usual place.-writeAutogenFiles :: MonadIO m => QueryEnv -> m ()-writeAutogenFiles qe  =-  liftIO $ void $ invokeHelper qe ["write-autogen-files"]---- | Get the path to the sandbox package-db in a project-getSandboxPkgDb :: (FilePath -> [String] -> String -> IO String)-             -> String-             -- ^ Cabal build platform, i.e. @buildPlatform@-             -> Version-             -- ^ GHC version (@cProjectVersion@ is your friend)-             -> IO (Maybe FilePath)-getSandboxPkgDb readProc =-    CabalHelper.Shared.Sandbox.getSandboxPkgDb $ unsafePerformIO $ buildPlatform readProc--buildPlatform :: (FilePath -> [String] -> String -> IO String) -> IO String-buildPlatform readProc = do-  exe  <- findLibexecExe-  CabalHelper.Shared.Sandbox.dropWhileEnd isSpace <$> readProc exe ["print-build-platform"] ""---- | This exception is thrown by all 'runQuery' functions if the internal--- wrapper executable cannot be found. You may catch this and present the user--- an appropriate error message however the default is to print--- 'libexecNotFoundError'.-data LibexecNotFoundError = LibexecNotFoundError String FilePath-                          deriving (Typeable)-instance Exception LibexecNotFoundError-instance Show LibexecNotFoundError where-  show (LibexecNotFoundError exe dir) =-    libexecNotFoundError exe dir "https://github.com/DanielG/cabal-helper/issues"--findLibexecExe :: IO FilePath-findLibexecExe = do-    libexecdir <- getLibexecDir-    let exeName = "cabal-helper-wrapper"-        exe = libexecdir </> exeName FP.<.> exeExtension'--    exists <- doesFileExist exe--    if exists-       then return exe-       else do-         mdir <- tryFindCabalHelperTreeDistDir-         dir <- case mdir of-           Nothing ->-               throwIO $ LibexecNotFoundError exeName libexecdir-           Just dir ->-               return dir--         return $ dir </> "build" </> exeName </> exeName--findPlanJson :: FilePath -> IO (Maybe FilePath)-findPlanJson base =-    findFile (map (</> "cache") $ parents base) "plan.json"--parents :: FilePath -> [FilePath]-parents path = takeWhile (not . (`elem` ["", "."]) . dropDrive) dirs-  where dirs = iterate takeDirectory path--data DistDir = DistDir { ddType :: DistDirType, unDistDir :: FilePath }-  deriving (Eq, Ord, Read, Show)-data DistDirType = NewBuildDist | OldBuildDist-  deriving (Eq, Ord, Read, Show)--tryFindCabalHelperTreeDistDir :: IO (Maybe FilePath)-tryFindCabalHelperTreeDistDir = do-  exe <- canonicalizePath =<< getExecutablePath'-  mplan <- findPlanJson exe-  let mdistdir = takeDirectory . takeDirectory <$> mplan-  cwd <- getCurrentDirectory--  let candidates = sortBy (compare `on` ddType) $ concat-        [ maybeToList $ DistDir NewBuildDist <$> mdistdir-        , [ DistDir OldBuildDist $ (!!3) $ iterate takeDirectory exe ]-        , if takeFileName exe == "ghc" -- we're probably in ghci; try CWD-            then [ DistDir NewBuildDist $ cwd </> "dist-newstyle"-                 , DistDir NewBuildDist $ cwd </> "dist"-                 , DistDir OldBuildDist $ cwd </> "dist"-                 ]-            else []-        ]--  distdirs-      <-  filterM isDistDir candidates-      >>= mapM toOldBuildDistDir--  return $ fmap unDistDir $ join $ listToMaybe $ distdirs--isCabalHelperSourceDir :: FilePath -> IO Bool-isCabalHelperSourceDir dir =-    doesFileExist $ dir </> "cabal-helper.cabal"--isDistDir :: DistDir -> IO Bool-isDistDir (DistDir NewBuildDist dir) =-    doesFileExist (dir </> "cache" </> "plan.json")-isDistDir (DistDir OldBuildDist dir) =-    doesFileExist (dir </> "setup-config")--toOldBuildDistDir :: DistDir -> IO (Maybe DistDir)-toOldBuildDistDir (DistDir NewBuildDist dir) = do-    PlanJson {pjUnits} <- decodePlanJson $ dir </> "cache" </> "plan.json"-    let munit = find isCabalHelperUnit $ Map.elems pjUnits-    return $ DistDir OldBuildDist <$> join ((\Unit { uDistDir = mdistdir } -> mdistdir) <$> munit)-  where-    isCabalHelperUnit-      Unit { uPId = PkgId (PkgName n) _-           , uType = UnitTypeLocal-           , uComps-           } | n == "cabal-helper" &&-               Map.member (CompNameExe "cabal-helper-wrapper") uComps-             = True-    isCabalHelperUnit _ = False-toOldBuildDistDir x = return $ Just x-----libexecNotFoundError :: String   -- ^ Name of the executable we were trying to-                                 -- find-                     -> FilePath -- ^ Path to @$libexecdir@-                     -> String   -- ^ URL the user will be directed towards to-                                 -- report a bug.-                     -> String-libexecNotFoundError exe dir reportBug = printf- ( "Could not find $libexecdir/%s\n"- ++"\n"- ++"If you are a cabal-helper developer you can set the environment variable\n"- ++"`cabal_helper_libexecdir' to override $libexecdir[1]. The following will\n"- ++"work in the cabal-helper source tree:\n"- ++"\n"- ++"    $ export cabal_helper_libexecdir=$PWD/dist/build/%s\n"- ++"\n"- ++"[1]: %s\n"- ++"\n"- ++"If you don't know what I'm talking about something went wrong with your\n"- ++"installation. Please report this problem here:\n"- ++"\n"- ++"    %s") exe exe dir reportBug--getExecutablePath' :: IO FilePath-getExecutablePath' =-#if MIN_VERSION_base(4,6,0)-    getExecutablePath-#else-    getProgName-#endif--lookupEnv' :: String -> IO (Maybe String)-lookupEnv' k = lookup k <$> getEnvironment--exeExtension' :: FilePath-exeExtension'-    | Windows <- buildOS = "exe"-    | otherwise = ""+-- Copyright (C) 2015-2019  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-# LANGUAGE RecordWildCards, FlexibleContexts, ConstraintKinds,+  GeneralizedNewtypeDeriving, DeriveDataTypeable, DeriveGeneric, DeriveFunctor,+  StandaloneDeriving, NamedFieldPuns, OverloadedStrings, ViewPatterns,+  TupleSections, TypeFamilies, DataKinds, GADTs, ScopedTypeVariables,+  ImplicitParams, RankNTypes, MultiWayIf #-}++{-# OPTIONS_GHC -fno-warn-name-shadowing #-}++{-|+Module      : Distribution.Helper+License     : Apache-2.0+Maintainer  : cabal-helper@dxld.at+Portability : POSIX+-}++module Distribution.Helper (+  -- * Type Variable Naming Conventions+  -- $type-conventions++  -- * Running Queries+    Query+  , runQuery++  -- * Queries against Cabal\'s on disk state++  -- ** Project queries+  , compilerVersion+  , projectPackages++  -- ** 'Package' queries+  , Package -- abstract+  , pPackageName+  , pSourceDir+  , pUnits++  -- ** 'Unit' queries+  , Unit -- abstract+  , uComponentName+  , UnitId -- abstract+  , UnitInfo(..)+  , unitInfo++  -- ** Convenience Queries+  , allUnits++  -- * Query environment+  , QueryEnv+  , QueryEnvI -- abstract+  , mkQueryEnv+  , qeReadProcess+  , qeCallProcess+  , qePrograms+  , qeProjLoc+  , qeDistDir++  -- * GADTs+  , ProjType(..)+  , CabalProjType(..)+  , ProjLoc(..)+  , DistDir(..)+  , SProjType(..)+  , demoteSProjType+  , projTypeOfDistDir+  , projTypeOfProjLoc+  , SCabalProjType(..)+  , Ex(..)++  -- * Programs+  , Programs(..)+  , defaultPrograms+  , EnvOverride(..)++  -- * Query result types+  , ChComponentInfo(..)+  , ChComponentName(..)+  , ChLibraryName(..)+  , ChModuleName(..)+  , ChPkgDb(..)+  , ChEntrypoint(..)++  -- * General information+  , Distribution.Helper.buildPlatform++  -- * Legacy v1-build helpers+  , Distribution.Helper.getSandboxPkgDb++  -- * Build actions+  , prepare+  , writeAutogenFiles+  , buildProject+  , buildUnits+  ) where++import Cabal.Plan hiding (Unit, UnitId, uDistDir)+import Control.Applicative+import Control.Monad+import Control.Monad.Trans.Maybe+import Control.Monad.IO.Class+import Control.Exception as E+import qualified Data.ByteString.Char8 as BS8+import qualified Data.ByteString.UTF8 as BSU+import Data.IORef+import Data.List hiding (filter)+import Data.String+import qualified Data.Text as Text+import Data.Maybe+import Data.Either+import Data.Map.Strict (Map)+import qualified Data.Map.Strict as Map+import Data.Set (Set)+import qualified Data.Set as Set+import qualified Data.Traversable as T+import Data.List.NonEmpty (NonEmpty(..))+import qualified Data.List.NonEmpty as NonEmpty+import Data.Version+import Data.Function+import System.Clock as Clock+import System.IO+import System.Environment+import System.FilePath+import System.Directory+import System.Process+import System.Posix.Types+import System.PosixCompat.Files+import Text.Printf+import Text.Read+import Prelude++import CabalHelper.Compiletime.Compile+import qualified CabalHelper.Compiletime.Program.Stack as Stack+import qualified CabalHelper.Compiletime.Program.GHC as GHC+import qualified CabalHelper.Compiletime.Program.CabalInstall as CabalInstall+import CabalHelper.Compiletime.Cabal+import CabalHelper.Compiletime.CompPrograms+import CabalHelper.Compiletime.Log+import CabalHelper.Compiletime.Process+import CabalHelper.Compiletime.Sandbox+import CabalHelper.Compiletime.Types+import CabalHelper.Compiletime.Types.RelativePath+import CabalHelper.Shared.InterfaceTypes+import CabalHelper.Shared.Common+import CabalHelper.Runtime.HelperMain (helper_main)++import CabalHelper.Compiletime.Compat.Version++import Distribution.System (buildPlatform)+import Distribution.Text (display)++-- $type-conventions+-- Throughout the API we use the following conventions for type variables:+--+-- * @pt@ stands for "project type", when instantiated it is always of kind+--   'ProjType'.+--+-- * @c@ stands for "cache". It is used internally to make the cache+--   inaccessible for some parts of the implementation. Users of the API may+--   completely ignore this parameter. See the internal 'qeCacheRef' field+--   accessor of 'QueryEnv' for details.+++-- | A query against a package's Cabal configuration. Use 'runQuery' to+-- execute it.+newtype Query pt a = Query+    { unQuery :: QueryEnv pt -> IO a+    -- ^ @runQuery env query@. Run a 'Query' under a given 'QueryEnv.+    }++instance Functor (Query pt) where+    fmap = liftM++instance Applicative (Query pt) where+    (<*>) = ap+    pure = return++instance Monad (Query pt) where+    (Query ma) >>= amb = Query $ \qe -> ma qe >>= \a -> unQuery (amb a) qe+    return a = Query $ const $ return a++runQuery :: Query pt a -> QueryEnv pt -> IO a+runQuery (Query action) qe = do+  ckr <- newIORef $ CacheKeyCache Nothing+  let qe' = qe { qeCacheKeys = ckr }+  conf_progs <- getConfProgs qe'+  action qe' { qePrograms = conf_progs }++-- | @mkQueryEnv projdir distdir@. Smart constructor for 'QueryEnv'.+-- Sets fields 'qeProjLoc' and 'qeDistDir' to @projdir@ and @distdir@+-- respectively and provides sensible defaults for the other fields.+mkQueryEnv+    :: ProjLoc pt+    -- ^ Location of the project.+    -> DistDir pt+    -- ^ Path to the @dist/@ or @dist-newstyle/@ directory, called+    -- /builddir/ in Cabal terminology.+    -> IO (QueryEnv pt)+mkQueryEnv projloc distdir = do+  cr <- newIORef $ QueryCache Nothing Nothing Nothing Map.empty+  return $ QueryEnv+    { qeReadProcess = \stdin mcwd env exe args -> do+        withVerbosity $ readProcessStderr mcwd env exe args ""+    , qeCallProcess  = \mcwd env exe args ->+        withVerbosity $ callProcessStderr mcwd env exe args+    , qePrograms     = defaultPrograms+    , qeProjLoc      = projloc+    , qeDistDir      = distdir+    , qeCacheRef     = cr+    , qeCacheKeys    = error "mkQuery: qeCacheKeys is uninitialized!"+    }++-- | Construct paths to project configuration files given where the project is.+projConf :: ProjLoc pt -> IO (ProjConf pt)+projConf (ProjLocV1Dir pkgdir) =+  ProjConfV1 <$> (complainIfNoCabalFile pkgdir =<< findCabalFile pkgdir)+projConf (ProjLocV1CabalFile cabal_file _) = return $+  ProjConfV1 cabal_file+projConf (ProjLocV2Dir projdir_path) =+  projConf $ ProjLocV2File (projdir_path </> "cabal.project") projdir_path+projConf (ProjLocV2File proj_file _) = return $+  ProjConfV2+    { pcV2CabalProjFile       = proj_file+    , pcV2CabalProjLocalFile  = proj_file <.> "local"+    , pcV2CabalProjFreezeFile = proj_file <.> "freeze"+    }+projConf (ProjLocStackYaml stack_yaml) = return $+  ProjConfStack+    { pcStackYaml = stack_yaml }++-- | Get the current modification-time for each file involved in configuring a+-- project. Optional files in 'ProjConf' are handled by not including them in+-- the result list in 'ProjConfModTimes' if they don\'t exist. This causes the+-- lists to be different if the files end up existing later, which is all we+-- need for cache invalidation.+getProjConfModTime :: ProjConf pt -> IO ProjConfModTimes+getProjConfModTime ProjConfV1{pcV1CabalFile} =+  fmap ProjConfModTimes $ mapM getFileModTime+    [ pcV1CabalFile+    ]+getProjConfModTime ProjConfV2{..} = do+  fmap (ProjConfModTimes . catMaybes) $+    mapM (traverse getFileModTime <=< mightExist)+      [ pcV2CabalProjFile+      , pcV2CabalProjLocalFile+      , pcV2CabalProjFreezeFile+      ]+getProjConfModTime ProjConfStack{..} =+  fmap ProjConfModTimes $ mapM getFileModTime+    [ pcStackYaml+    ]++getUnitModTimes :: Unit pt -> IO UnitModTimes+getUnitModTimes+  Unit+    { uDistDir=DistDirLib distdirv1+    , uPackage=Package+      { pCabalFile=CabalFile cabal_file_path+      , pSourceDir+      }+    , uImpl+    }+  = do+    umtPkgYaml <-+        case uImpl of+          UnitImplStack{}+            -> traverse getFileModTime =<< mightExist package_yaml_path+          _ -> return Nothing+    umtCabalFile <- getFileModTime cabal_file_path+    umtSetupConfig <- (traverse getFileModTime <=< mightExist) setup_config_path+    return UnitModTimes {..}+  where+    package_yaml_path = pSourceDir  </> "package.yaml"+    setup_config_path = distdirv1 </> "setup-config"+++-- | The version of GHC the project is configured to use for compilation.+compilerVersion :: Query pt (String, Version)+compilerVersion = Query $ \qe ->+  getProjInfo qe >>= \proj_info ->+    let someUnit = NonEmpty.head $ pUnits $+                   NonEmpty.head $ piPackages proj_info in+    --  ^ ASSUMPTION: Here we assume the compiler version is uniform across all+    --  units so we just pick any one.+    case piImpl proj_info of+      ProjInfoV1 {} -> uiCompilerId <$> getUnitInfo qe someUnit+      ProjInfoV2 { piV2CompilerId } -> return piV2CompilerId+      ProjInfoStack {} -> uiCompilerId <$> getUnitInfo qe someUnit++-- | All local packages currently active in a project\'s build plan.+projectPackages :: Query pt (NonEmpty (Package pt))+projectPackages = Query $ \qe -> piPackages <$> getProjInfo qe++-- | Get the 'UnitInfo' for a given 'Unit'. To get a 'Unit' see 'projectUnits'.+unitInfo :: Unit pt -> Query pt UnitInfo+unitInfo u = Query $ \qe -> getUnitInfo qe u++-- | Get information on all units in a project.+allUnits :: (UnitInfo -> a) -> Query pt (NonEmpty a)+allUnits f = do+  fmap f <$> (T.mapM unitInfo =<< join . fmap pUnits <$> projectPackages)+++data Cached c ckc k v = Cached+  { cGet      :: !(c -> Maybe (k, v))+  , cSet      :: !(c -> (k, v) -> c)++  , cGetKey   :: !(ckc -> Maybe k)+  , cSetKey   :: !(ckc -> k -> ckc)++  , cCheckKey :: !(IO k)+  , cKeyValid :: !(k -> k -> Bool)+  -- ^ @cKeyValid old new@ should return 'True' if 'old' is still valid+  -- relative to the value of 'new'.++  , cRegen    :: !(k -> IO v)+  }++-- | Simple caching scheme. Invalidation is based on equality of a "cache+-- key" the current value of which can be got with the IO action 'cGetKey'.+--+-- Note that we only check the actual value of the cache key once per+-- 'runQuery' call by saving the cache key in an ephemeral map.+cached :: QueryEnvI (QueryCacheI a b c d) pt+       -> Cached (QueryCacheI a b c d pt) (CacheKeyCache pt) k v+       -> IO v+cached qe Cached{..} = do+  c <- readIORef (qeCacheRef qe)+  (c', v) <- checkUpdate c (cGet c)+  writeIORef (qeCacheRef qe) c'+  return v+ where+  checkUpdate c m = do+    ckc <- readIORef (qeCacheKeys qe)+    let regen ck = (ck,) <$> cRegen ck+    n <- case m of+      Nothing -> do+        ck <- cCheckKey+        writeIORef (qeCacheKeys qe) (cSetKey ckc ck)+        regen ck+      Just old@(old_ck, old_v) -> do+        ck <- case cGetKey ckc of+          Just cck ->+            return cck -- TODO: skip valid check below in this case+          Nothing -> do+            ck <- cCheckKey+            writeIORef (qeCacheKeys qe) (cSetKey ckc ck)+            return ck+        if+          | cKeyValid old_ck ck -> return old+          | otherwise -> regen ck+    return (cSet c n, snd n)++getProjConfAndModTime :: QueryEnvI c pt -> IO (ProjConf pt, ProjConfModTimes)+getProjConfAndModTime qe = do+  proj_conf <- projConf (qeProjLoc qe)+  mtime <- getProjConfModTime proj_conf+  return (proj_conf, mtime)++getPreInfo :: QueryEnvI (QCPreInfo a b c) pt -> IO (PreInfo pt)+getPreInfo qe =+  cached qe $ Cached+    { cGet = qcPreInfo+    , cSet = \a b -> a { qcPreInfo = Just b }+    , cGetKey = ckcProjConf+    , cSetKey = \a b -> a { ckcProjConf = Just b }+    , cCheckKey = getProjConfAndModTime qe+    , cKeyValid = (==) `on` snd+    , cRegen = \_k -> readPreInfo qe+    }++readPreInfo :: QueryEnvI c pt -> IO (PreInfo pt)+readPreInfo qe = do+  case projTypeOfQueryEnv qe of+    SStack -> do+      piStackProjPaths <- Stack.projPaths qe+      return PreInfoStack+        { piStackProjPaths+        }+    (SCabal _) ->+      return PreInfoCabal++getProjInfo :: QueryEnv pt -> IO (ProjInfo pt)+getProjInfo qe = do+  pre_info <- getPreInfo qe+  cached qe $ Cached+    { cGet = qcProjInfo+    , cSet = \c n@(_, proj_info) ->+        let active_units = NonEmpty.toList $ join $+              fmap pUnits $ piPackages proj_info in+        c { qcProjInfo = Just n+          , qcUnitInfos =+               discardInactiveUnitInfos active_units (qcUnitInfos c)+          }+    , cGetKey = ckcProjConf+    , cSetKey = \a b -> a { ckcProjConf = Just b }+    , cCheckKey = getProjConfAndModTime qe+    , cKeyValid = (==) `on` snd+    , cRegen = \(proj_conf, mtime) -> do+        shallowReconfigureProject qe+        readProjInfo qe proj_conf mtime pre_info+    }++getUnitInfo :: QueryEnv pt -> Unit pt -> IO UnitInfo+getUnitInfo qe@QueryEnv{..} unit@Unit{uDistDir} = do+  pre_info <- getPreInfo qe+  proj_info <- getProjInfo qe+  cached qe $ Cached+    { cGet = \c -> do+        ui <- Map.lookup uDistDir (qcUnitInfos c)+        return (uiModTimes ui, ui)+    , cSet = \c (_mtimes, unit_info) -> c { qcUnitInfos =+        Map.insert uDistDir unit_info (qcUnitInfos c) }++    , cGetKey = const Nothing+    , cSetKey = const+    , cCheckKey = getUnitModTimes unit+    , cKeyValid = (==)++    , cRegen = \mtimes -> do+        reconfigureUnit qe unit+        helper <- getHelper pre_info proj_info qe+        readUnitInfo helper unit mtimes+    }++-- | Restrict 'UnitInfo' cache to units that are still active+discardInactiveUnitInfos+    :: [Unit pt]+    -> Map DistDirLib UnitInfo+    -> Map DistDirLib UnitInfo+discardInactiveUnitInfos active_units uis0 =+    restrictKeysMap uis0 $ Set.fromList $ map uDistDir active_units+  where+    restrictKeysMap :: Ord k => Map k a -> Set k -> Map k a+    restrictKeysMap m s = Map.filterWithKey (\k _ -> Set.member k s) m+++-- | Regenerate project-level information by calling the appropriate build+-- system.+shallowReconfigureProject :: QueryEnvI (QCProgs a b) pt -> IO ()+shallowReconfigureProject QueryEnv+  { qeProjLoc = ProjLocStackYaml _stack_yaml, .. } = do+    -- Stack's dry-run only generates the cabal file from package.yaml (or+    -- well that's the only thing we would care about). reconfigureUnit+    -- will take care of this though and we don't need the cabal files+    -- before the Unit stage anyways.+    return ()+shallowReconfigureProject qe = do+  buildProjectTarget qe Nothing DryRun++reconfigureUnit :: QueryEnvI c pt -> Unit pt -> IO ()+reconfigureUnit qe u = buildProjectTarget qe (Just u) OnlyCfg++buildUnits :: [Unit pt] -> Query pt ()+buildUnits units = Query $ \qe -> do+  conf_progs <- getConfProgs qe+  forM_ units $ \u ->+    buildProjectTarget qe { qePrograms = conf_progs } (Just u) DoBuild++buildProject :: Query pt ()+buildProject = Query $ \qe -> do+  conf_progs <- getConfProgs qe+  buildProjectTarget qe { qePrograms = conf_progs } Nothing DoBuild++data BuildStage = DryRun | OnlyCfg | DoBuild++buildProjectTarget+    :: QueryEnvI c pt -> Maybe (Unit pt) -> BuildStage -> IO ()+buildProjectTarget qe mu stage = do+  -- Stack and cabal just happen to have the same stage options, totally by+  -- accident :)+  stage_opts :: [String] <- return $ case stage of+    DryRun  -> ["--dry-run"]+    OnlyCfg -> ["--only-configure"]+    DoBuild -> []+  -- TODO: version check for cabal's --only-configure+  case qe of+    QueryEnv { qeDistDir = DistDirCabal cpt distdir, qeProjLoc } -> do+      let projdir = plCabalProjectDir qeProjLoc+      cmd <- return $ case stage of+        DryRun | SCV1 <- cpt ->+          CabalInstall.CIConfigure+        OnlyCfg ->+          CabalInstall.CIConfigure+        _ ->+          CabalInstall.CIBuild+      CabalInstall.callCabalInstallCmd qe (Just projdir) cmd $+        case cpt of+          SCV1 ->+            [ "--builddir="++distdir ]+          SCV2 -> do+            targets <- return $ case mu of+              Nothing -> ["all"]+              Just Unit{uImpl} -> concat+                [ if uiV2OnlyDependencies uImpl+                    then ["--only-dependencies"] else []+                , uiV2Components uImpl+                ]+            case qeProjLoc of+              ProjLocV2File {plCabalProjectFile} ->+                [ "--project-file="++plCabalProjectFile+                , "--builddir="++distdir+                ] ++ stage_opts ++ targets+              ProjLocV2Dir {} ->+                [ "--builddir="++distdir+                ] ++ stage_opts ++ targets++    QueryEnv { qeDistDir = DistDirStack mworkdir+             , qeProjLoc = qeProjLoc@ProjLocStackYaml {plStackYaml}+             } -> do+      let projdir = plStackProjectDir qeProjLoc+      let workdir_opts = Stack.workdirArg qe+      case mu of+        Just Unit{uPackage=Package{pSourceDir}} ->+          Stack.callStackCmd qe (Just pSourceDir) $+            workdir_opts +++            [ "--stack-yaml="++plStackYaml, "build", "."+            ] ++ stage_opts+        Nothing ->+          Stack.callStackCmd qe (Just projdir) $+            workdir_opts +++            [ "--stack-yaml="++plStackYaml, "build"+            ] ++ stage_opts++getFileModTime :: FilePath -> IO (FilePath, EpochTime)+getFileModTime f = do+  t <- modificationTime <$> getFileStatus f+  return (f, t)++readProjInfo+    :: QueryEnvI c pt -> ProjConf pt -> ProjConfModTimes -> PreInfo pt -> IO (ProjInfo pt)+readProjInfo qe pc pcm pi = withVerbosity $ do+  let projloc = qeProjLoc qe+  case (qeDistDir qe, pc) of+    (DistDirCabal SCV1 distdir, ProjConfV1{pcV1CabalFile}) -> do+      setup_config_path <- canonicalizePath (distdir </> "setup-config")+      mhdr <- readSetupConfigHeader setup_config_path+      case mhdr of+        Just hdr@(UnitHeader (pkg_name_bs, _pkg_ver) ("Cabal", hdrCabalVersion) _compId) -> do+          let+            v3_0_0_0 = makeVersion [3,0,0,0]+            pkg_name+              | hdrCabalVersion >= v3_0_0_0 = BSU.toString pkg_name_bs+              | otherwise = BS8.unpack pkg_name_bs+            pkg = Package+              { pPackageName = pkg_name+              , pSourceDir = plCabalProjectDir projloc+              , pCabalFile = CabalFile pcV1CabalFile+              , pFlags = []+              , pUnits = (:|[]) Unit+                { uUnitId = UnitId pkg_name+                , uPackage = pkg { pUnits = () }+                , uDistDir = DistDirLib distdir+                , uImpl = UnitImplV1+                }+              }+            piImpl = ProjInfoV1 { piV1SetupHeader = hdr }+          return ProjInfo+            { piCabalVersion = hdrCabalVersion+            , piProjConfModTimes = pcm+            , piPackages = pkg :| []+            , piImpl+            }+        Just UnitHeader {uhSetupId=(setup_name, _)} ->+          panicIO $ printf "Unknown Setup package-id in setup-config header '%s': '%s'"+                      (BS8.unpack setup_name) setup_config_path+        Nothing ->+          panicIO $ printf "Could not read '%s' header" setup_config_path++    (DistDirCabal SCV2 distdirv2, _) -> do+      let plan_path = distdirv2 </> "cache" </> "plan.json"+      plan_mtime <- modificationTime <$> getFileStatus plan_path+      plan@PlanJson { pjCabalLibVersion=Ver pjCabalLibVersion+                    , pjCabalVersion+                    , pjCompilerId=PkgId (PkgName compName) (Ver compVer)+                    }+          <- decodePlanJson plan_path+      when (pjCabalVersion < Ver [2,4,1,0]) $+        panicIO $ "plan.json was produced by too-old a version of\+                  \cabal-install. The 'dist-dir' keys will be missing. \+                  \Please upgrade to at least cabal-instal-2.4.1.0"++      Just pkgs <- NonEmpty.nonEmpty <$> CabalInstall.planPackages plan+      return ProjInfo+        { piCabalVersion = makeDataVersion pjCabalLibVersion+        , piProjConfModTimes = pcm+        , piPackages = NonEmpty.sortWith pPackageName pkgs+        , piImpl = ProjInfoV2+          { piV2Plan = plan+          , piV2PlanModTime = plan_mtime+          , piV2CompilerId = (Text.unpack compName, makeDataVersion compVer)+          }+        }+    (DistDirStack{}, _) -> do+      Just cabal_files <- NonEmpty.nonEmpty <$> Stack.listPackageCabalFiles qe+      pkgs <- mapM (Stack.getPackage qe) cabal_files+      Just (cabalVer:_) <- runMaybeT $+        let ?progs = qePrograms qe in+        let PreInfoStack {piStackProjPaths} = pi in+        GHC.listCabalVersions (Just (sppGlobalPkgDb piStackProjPaths))+        --  ^ See [Note Stack Cabal Version]+      return ProjInfo+        { piCabalVersion = cabalVer+        , piProjConfModTimes = pcm+        , piPackages = NonEmpty.sortWith pPackageName pkgs+        , piImpl = ProjInfoStack+        }++-- [Note Stack Cabal Version]+--+-- Stack just uses ghc-pkg on the global-pkg-db to determine the+-- appropriate Cabal version for a resolver when building, see+-- Stack.Setup.pathsFromCompiler(cabalPkgVer). We do essentially the same+-- thing here.+--+-- The code for building Setup.hs is in Stack.Build.Execute and the version+-- of cabal is set in withSingleContext.withCabal.getPackageArgs.+--+-- Note there is some special casing going on (see 'depsMinusCabal'), they+-- use the packages from the snapshot pkg-db except Cabal which comes from+-- the global pkg-db.++readUnitInfo :: Helper pt -> Unit pt -> UnitModTimes -> IO UnitInfo+readUnitInfo helper unit@Unit {uUnitId=uiUnitId} uiModTimes = do+    res <- runHelper helper unit+           [ "package-id"+           , "compiler-id"+           , "flags"+           , "config-flags"+           , "non-default-config-flags"+           , "component-info"+           ]+    let [ Just (ChResponseVersion        uiPackageId),+          Just (ChResponseVersion        uiCompilerId),+          Just (ChResponseFlags          uiPackageFlags),+          Just (ChResponseFlags          uiConfigFlags),+          Just (ChResponseFlags          uiNonDefaultConfigFlags),+          Just (ChResponseComponentsInfo uiComponents)+          ] = res+    return $ UnitInfo {..}++readHelper+    :: QueryEnvI c pt+    -> FilePath+    -> CabalFile+    -> DistDirLib+    -> [String]+    -> IO [Maybe ChResponse]+readHelper qe exe cabal_file distdir args = do+  out <- invokeHelper qe exe cabal_file distdir args+  let res :: [Maybe ChResponse]+      res = read out+  liftIO $ evaluate res `E.catch` \ex@ErrorCall{} -> do+      md <- lookupEnv' "CABAL_HELPER_DEBUG"+      let msg = "readHelper: exception: '" ++ show ex ++ "'"+      panicIO $ msg ++ case md of+        Nothing -> "\n  for more information set the environment variable CABAL_HELPER_DEBUG and try again"+        Just _ -> "\n  output:\n'"++ out ++"'"++invokeHelper+    :: QueryEnvI c pt+    -> FilePath+    -> CabalFile+    -> DistDirLib+    -> [String]+    -> IO String+invokeHelper+  QueryEnv {..}+  exe+  (CabalFile cabal_file_path)+  (DistDirLib distdir)+  args0+  = do+    let args1 = cabal_file_path : distdir : args0+    evaluate =<< qeReadProcess "" Nothing [] exe args1 `E.catch`+      \(_ :: E.IOException) ->+        panicIO $ concat+          ["invokeHelper", ": ", exe, " "+          , intercalate " " (map show args1)+          , " failed!"+          ]++-- | Make sure the appropriate helper executable for the given project is+-- installed and ready to run queries.+--+-- The idea is you can run this at a convinient time instead of having the+-- helper compilation happen during a time-sensitive user interaction. This+-- will however happen automatically as needed if you don't run it first.+prepare :: Query pt ()+prepare = Query $ \qe -> do+  pre_info <- getPreInfo qe+  proj_info <- getProjInfo qe+  void $ getHelper pre_info proj_info qe++-- | Create @cabal_macros.h@, @Paths_\<pkg\>.hs@ and other generated files+-- in the usual place. See 'Distribution.Simple.Build.initialBuildSteps'.+--+-- This is usually only needed on the first load of a unit or after the+-- cabal file changes.+writeAutogenFiles :: Unit pt -> Query pt ()+writeAutogenFiles unit = Query $ \qe -> do+  pre_info <- getPreInfo qe+  proj_info <- getProjInfo qe+  helper <- getHelper pre_info proj_info qe+  void $ runHelper helper unit ["write-autogen-files"]++-- | Get the path to the sandbox package-db in a project+getSandboxPkgDb+    :: String+    -- ^ Cabal build platform, i.e. @buildPlatform@+    -> GHC.GhcVersion+    -- ^ GHC version (@cProjectVersion@ is your friend)+    -> FilePath+    -- ^ Path to the project directory, i.e. a directory containing a+    -- @cabal.sandbox.config@ file+    -> IO (Maybe FilePath)+getSandboxPkgDb buildPlat ghcVer projdir =+  CabalHelper.Compiletime.Sandbox.getSandboxPkgDb buildPlat ghcVer projdir++buildPlatform :: String+buildPlatform = display Distribution.System.buildPlatform++lookupEnv' :: String -> IO (Maybe String)+lookupEnv' k = lookup k <$> getEnvironment++withVerbosity :: (Verbose => IO a) -> IO a+withVerbosity act = do+  x <- lookup  "CABAL_HELPER_DEBUG" <$> getEnvironment+  let ?verbose = \level ->+        case x >>= readMaybe of+          Just x | x >= level -> True+          _ -> False+  act++getConfProgs :: QueryEnvI (QCProgs a b) pt -> IO Programs+getConfProgs qe = do+  pre_info <- getPreInfo qe+  cached qe $ Cached+    { cGet = qcConfProgs+    , cSet = \a b -> a { qcConfProgs = Just b }+    , cGetKey = const Nothing+    , cSetKey = const+    , cCheckKey = return (qePrograms qe)+    , cKeyValid = (==)+    , cRegen = \_k -> configurePrograms qe pre_info+    }++-- | Fixup program paths as appropriate for current project-type and bring+-- 'Programs' into scope as an implicit parameter.+configurePrograms :: QueryEnvI c pt -> PreInfo pt -> IO Programs+configurePrograms qe@QueryEnv{..} pre_info = withVerbosity $ do+  patchBuildToolProgs (projTypeOfQueryEnv qe) <=< guessCompProgramPaths $+    case pre_info of+      PreInfoStack projPaths ->+        Stack.patchCompPrograms projPaths qePrograms+      _ -> qePrograms++newtype Helper pt+  = Helper { runHelper :: Unit pt -> [String] -> IO [Maybe ChResponse] }++getHelper :: PreInfo pt -> ProjInfo pt -> QueryEnvI c pt -> IO (Helper pt)+getHelper _pre_info ProjInfo{piCabalVersion} qe@QueryEnv{..}+  | piCabalVersion == bultinCabalVersion = return $ Helper $+      \Unit{ uDistDir=DistDirLib distdir+           , uPackage=Package{pCabalFile=CabalFile cabal_file}+           } args ->+        let pt = dispHelperProjectType (projTypeOfQueryEnv qe) in+        helper_main $ cabal_file : distdir : pt : args+getHelper pre_info proj_info qe@QueryEnv{..} = do+  withVerbosity $ do+    let ?progs = qePrograms+    t0 <- Clock.getTime Monotonic+    eexe <- compileHelper $ mkCompHelperEnv qeProjLoc qeDistDir pre_info proj_info+    t1 <- Clock.getTime Monotonic+    let dt = (/10^9) $ fromInteger $ Clock.toNanoSecs $ Clock.diffTimeSpec t0 t1+        dt :: Float+    vLog $ printf "compileHelper took %.5fs" dt+    case eexe of+      Left rv ->+        panicIO $ "compileHelper': compiling helper failed! exit code "++ show rv+      Right exe ->+        let pt = dispHelperProjectType (projTypeOfQueryEnv qe) in+        return $ Helper $ \Unit{uDistDir, uPackage=Package{pCabalFile}} args ->+          readHelper qe exe pCabalFile uDistDir (pt : args)++dispHelperProjectType :: SProjType pt -> String+dispHelperProjectType (SCabal SCV1) = "v1"+--  ^ v1-build needs a last minute addition of the inplace package-db+-- beyond what lbi has+dispHelperProjectType (SCabal SCV2) = "v2"+dispHelperProjectType SStack        = "v2"+--  ^ stack also embeds all necessary options into lbi like v2++mkCompHelperEnv+    :: Verbose+    => ProjLoc pt+    -> DistDir pt+    -> PreInfo pt+    -> ProjInfo pt+    -> CompHelperEnv+mkCompHelperEnv+  projloc+  (DistDirCabal SCV1 distdir)+  PreInfoCabal+  ProjInfo{piCabalVersion}+  = CompHelperEnv+    { cheCabalVer = CabalVersion piCabalVersion+    , cheProjDir  = plCabalProjectDir projloc+    , cheProjLocalCacheDir = distdir+    , chePkgDb    = Nothing+    , chePlanJson = Nothing+    , cheDistV2 = Nothing+    }+mkCompHelperEnv+  projloc+  (DistDirCabal SCV2 distdir)+  PreInfoCabal+  ProjInfo{piImpl=ProjInfoV2{piV2Plan=plan}}+  = CompHelperEnv {..}+  where+    cheProjDir  = plCabalProjectDir projloc+    cheCabalVer = CabalVersion $ makeDataVersion pjCabalLibVersion+    cheProjLocalCacheDir = distdir </> "cache"+    chePkgDb    = Nothing+    chePlanJson = Just plan+    cheDistV2   = Just distdir+    PlanJson {pjCabalLibVersion=Ver pjCabalLibVersion } = plan+mkCompHelperEnv+  (ProjLocStackYaml stack_yaml)+  (DistDirStack mworkdir)+  PreInfoStack+    { piStackProjPaths=StackProjPaths+      { sppGlobalPkgDb }+    }+  ProjInfo { piCabalVersion }+  = let workdir = fromMaybe ".stack-work" $ unRelativePath <$> mworkdir in+    let projdir = takeDirectory stack_yaml in+    CompHelperEnv+    { cheCabalVer = CabalVersion $ piCabalVersion+    , cheProjDir  = projdir+    , cheProjLocalCacheDir = projdir </> workdir+    , chePkgDb    = Just sppGlobalPkgDb+    , chePlanJson = Nothing+    , cheDistV2 = Nothing+    }

@@ -0,0 +1,96 @@+-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2019  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-# LANGUAGE GADTs, TypeFamilies, DataKinds #-}++{-|+Module      : Distribution.Helper.Discover+Description : Finding project contexts+License     : Apache-2.0+Maintainer  : cabal-helper@dxld.at+Portability : portable+-}++-- TODO: $ sed -e s/DistDir/BuildDir/++module Distribution.Helper.Discover+  ( findProjects+  , getDefaultDistDir+  , isValidDistDir+  ) where++import Control.Monad.Writer+import System.Directory+import System.FilePath++import CabalHelper.Compiletime.Types+import CabalHelper.Compiletime.Cabal++-- | @findProjects dir@. Find available project instances in @dir@.+--+-- For example, if the given directory contains both a @cabal.project@ and+-- a @stack.yaml@ file:+--+-- >>> findProjects "."+-- [ Ex (ProjLocStackYaml "./stack.yaml"), Ex (ProjLocCabalV2File "./cabal.project") ]+--+-- Note that this function only looks for "default" project markers. If you+-- want to for example support the common pattern of having multiple+-- @stack-<GHC_VER>.yaml@ files simply fill out a 'ProjLoc' yourself. In+-- this case 'ProjLocStackYaml'.+findProjects :: FilePath -> IO [Ex ProjLoc]+findProjects dir = execWriterT $ do+  let cabalProject = dir </> "cabal.project"+  whenM (liftIO $ doesFileExist cabalProject) $+    tell [Ex $ ProjLocV2File cabalProject dir]+  let stackYaml = dir </> "stack.yaml"+  whenM (liftIO $ doesFileExist stackYaml) $+    tell [Ex $ ProjLocStackYaml stackYaml]+  maybeCabalDir <- liftIO (fmap takeDirectory <$> findCabalFile dir)+  forM_ [Ex . ProjLocV2Dir, Ex . ProjLocV1Dir] $ \proj -> traverse (tell . pure . proj) maybeCabalDir+++-- | @getDefaultDistDir pl@. Get the default dist-dir for the given project.+--+-- Note that the path in the returned dist-dir might not exist yet if the+-- build-tool has never been run for this project before. This is fine as+-- far as @cabal-helper@ is concerned. It will simply invoke the build-tool+-- as needed to answer the requested queries.+getDefaultDistDir :: ProjLoc pt -> DistDir pt+getDefaultDistDir (ProjLocV1CabalFile _cabal_file pkgdir) =+  DistDirCabal SCV1 $ pkgdir </> "dist"+getDefaultDistDir (ProjLocV1Dir pkgdir) =+  DistDirCabal SCV1 $ pkgdir </> "dist"+getDefaultDistDir (ProjLocV2File _cabal_project projdir) =+  DistDirCabal SCV2 $ projdir </> "dist-newstyle"+getDefaultDistDir (ProjLocV2Dir projdir) =+  DistDirCabal SCV2 $ projdir </> "dist-newstyle"+getDefaultDistDir (ProjLocStackYaml _) =+  DistDirStack Nothing++-- | @isValidDistDir distdir@. Check if @distdir@ looks like a valid+-- build-dir for it's project type. We just check if characteristic marker+-- files for the associated project type exist.+--+-- If the project type does not have a way to do this (for example+-- 'DistDirStack') check we return 'Nothing'.+isValidDistDir :: DistDir pt -> IO (Maybe Bool)+isValidDistDir (DistDirCabal cpt dir) = do+  fmap Just $ doesFileExist $ dir </> cabalProjTypeMarkerFile cpt+isValidDistDir DistDirStack{} =+  return Nothing++cabalProjTypeMarkerFile :: SCabalProjType pt -> FilePath+cabalProjTypeMarkerFile SCV1 = "setup-config"+cabalProjTypeMarkerFile SCV2 = "cache" </> "plan.json"++whenM :: Monad m => m Bool -> m () -> m ()+whenM p x = p >>= (`when` x)

@@ -0,0 +1,2 @@+module Symlink (createSymbolicLink) where+import System.Posix.Files (createSymbolicLink)

@@ -0,0 +1,3 @@+module Symlink (createSymbolicLink) where+import System.Win32.SymbolicLink (createSymbolicLinkFile)+createSymbolicLink = createSymbolicLinkFile

@@ -0,0 +1,291 @@+-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-|+Module      : CabalHelper.Compiletime.Program.Cabal+Description : Cabal library source unpacking+License     : Apache-2.0+-}++{-# LANGUAGE DeriveFunctor, ViewPatterns, OverloadedStrings, CPP #-}++module CabalHelper.Compiletime.Cabal where++import Data.Char+import Control.Exception+import Data.List+import Data.Maybe+import Data.Time.Calendar+import Data.Time.Clock+import Data.Time.Clock.POSIX+import Data.Version+import System.Directory+import System.FilePath+import System.IO+import Text.Printf++import Distribution.Verbosity (Verbosity, silent, normal, verbose, deafening)++import qualified Data.ByteString as BS+import qualified Data.ByteString.Char8 as BS8++import CabalHelper.Compiletime.Types+import CabalHelper.Compiletime.Process+import CabalHelper.Shared.Common (replace, parseVer, parseVerMay, parsePkgIdBS, panicIO)++type UnpackedCabalVersion = CabalVersion' (CommitId, CabalSourceDir)+type ResolvedCabalVersion = CabalVersion' CommitId+type CabalVersion = CabalVersion' ()++unpackedToResolvedCabalVersion :: UnpackedCabalVersion -> ResolvedCabalVersion+unpackedToResolvedCabalVersion (CabalHEAD (commit, _)) = CabalHEAD commit+unpackedToResolvedCabalVersion (CabalVersion ver) = CabalVersion ver++-- | Cabal library version we're compiling the helper exe against.+data CabalVersion' a+    = CabalHEAD a+    | CabalVersion { cvVersion :: Version }+      deriving (Eq, Ord, Functor)++newtype CommitId = CommitId { unCommitId :: String }++showUnpackedCabalVersion :: UnpackedCabalVersion -> String+showUnpackedCabalVersion (CabalHEAD (commitid, _)) =+  "HEAD-" ++ unCommitId commitid+showUnpackedCabalVersion CabalVersion {cvVersion} =+  showVersion cvVersion++showResolvedCabalVersion :: ResolvedCabalVersion -> String+showResolvedCabalVersion (CabalHEAD commitid) =+  "HEAD-" ++ unCommitId commitid+showResolvedCabalVersion CabalVersion {cvVersion} =+  showVersion cvVersion++showCabalVersion :: CabalVersion -> String+showCabalVersion (CabalHEAD ()) =+  "HEAD"+showCabalVersion CabalVersion {cvVersion} =+  showVersion cvVersion++data CabalPatchDescription = CabalPatchDescription+  { cpdVersions      :: [Version]+  , cpdUnpackVariant :: UnpackCabalVariant+  , cpdPatchFn       :: FilePath -> IO ()+  }++nopCabalPatchDescription :: CabalPatchDescription+nopCabalPatchDescription =+  CabalPatchDescription [] LatestRevision (const (return ()))++patchyCabalVersions :: [CabalPatchDescription]+patchyCabalVersions = [+  let versions  = [ Version [1,18,1] [] ]+      variant   = Pristine+      patch     = fixArrayConstraint+  in CabalPatchDescription versions variant patch,++  let versions  = [ Version [1,18,0] [] ]+      variant   = Pristine+      patch dir = do+        fixArrayConstraint dir+        fixOrphanInstance dir+  in CabalPatchDescription versions variant patch,++  let versions  = [ Version [1,24,1,0] [] ]+      variant   = Pristine+      patch _   = return ()+  in CabalPatchDescription versions variant patch+  ]+ where+   fixArrayConstraint dir = do+     let cabalFile    = dir </> "Cabal.cabal"+         cabalFileTmp = cabalFile ++ ".tmp"++     cf <- readFile cabalFile+     writeFile cabalFileTmp $ replace "&& < 0.5" "&& < 0.6" cf+     renameFile cabalFileTmp cabalFile++   fixOrphanInstance dir = do+     let versionFile    = dir </> "Distribution/Version.hs"+         versionFileTmp = versionFile ++ ".tmp"++     let languagePragma =+           "{-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}"+         languagePragmaCPP =+           "{-# LANGUAGE CPP, DeriveDataTypeable, StandaloneDeriving #-}"++         derivingDataVersion =+           "deriving instance Data Version"+         derivingDataVersionCPP = unlines [+             "#if __GLASGOW_HASKELL__ < 707",+             derivingDataVersion,+             "#endif"+           ]++     vf <- readFile versionFile+     writeFile versionFileTmp+       $ replace derivingDataVersion derivingDataVersionCPP+       $ replace languagePragma languagePragmaCPP vf++     renameFile versionFileTmp versionFile++unpackPatchedCabal :: Env => Version -> FilePath -> IO CabalSourceDir+unpackPatchedCabal cabalVer tmpdir = do+    res@(CabalSourceDir dir) <- unpackCabalHackage cabalVer tmpdir variant+    patch dir+    return res+  where+    CabalPatchDescription _ variant patch = fromMaybe nopCabalPatchDescription $+      find ((cabalVer `elem`) . cpdVersions) patchyCabalVersions++-- legacy, for `installCabalLib` v1+unpackCabalV1+  :: Env+  => UnpackedCabalVersion+  -> FilePath+  -> IO CabalSourceDir+unpackCabalV1 (CabalVersion ver) tmpdir = do+  csdir <- unpackPatchedCabal ver tmpdir+  return csdir+unpackCabalV1 (CabalHEAD (_commit, csdir)) _tmpdir =+  return csdir++unpackCabal :: Env => CabalVersion -> FilePath -> IO UnpackedCabalVersion+unpackCabal (CabalVersion ver) _tmpdir = do+  return $ CabalVersion ver+unpackCabal (CabalHEAD ()) tmpdir = do+  (commit, csdir) <- unpackCabalHEAD tmpdir+  return $ CabalHEAD (commit, csdir)++data UnpackCabalVariant = Pristine | LatestRevision+newtype CabalSourceDir = CabalSourceDir { unCabalSourceDir :: FilePath }+unpackCabalHackage+    :: (Verbose, Progs)+    => Version+    -> FilePath+    -> UnpackCabalVariant+    -> IO CabalSourceDir+unpackCabalHackage cabalVer tmpdir variant = do+  let cabal = "Cabal-" ++ showVersion cabalVer+      dir = tmpdir </> cabal+      variant_opts = case variant of Pristine -> [ "--pristine" ]; _ -> []+      args = [ "get", cabal ] ++ variant_opts+  callProcessStderr (Just tmpdir) [] (cabalProgram ?progs) args+  return $ CabalSourceDir dir++unpackCabalHEAD :: Env => FilePath -> IO (CommitId, CabalSourceDir)+unpackCabalHEAD tmpdir = do+  let dir = tmpdir </> "cabal-head.git"+      url = "https://github.com/haskell/cabal.git"+  callProcessStderr (Just "/") [] "git" [ "clone", "--depth=1", url, dir]+  callProcessStderr (Just (dir </> "Cabal")) [] "cabal"+    [ "act-as-setup", "--", "sdist"+    , "--output-directory=" ++ tmpdir </> "Cabal" ]+  commit <- takeWhile isHexDigit <$>+    readCreateProcess (proc "git" ["rev-parse", "HEAD"]){ cwd = Just dir } ""+  ts <-+    readCreateProcess (proc "git" [ "show", "-s", "--format=%ct", "HEAD" ])+      { cwd = Just dir } ""+  let ut = posixSecondsToUTCTime $ fromInteger (read ts)+      (y,m,d) = toGregorian $ utctDay ut+      sec = round $ utctDayTime ut+      datecode =+        read $ show y ++ printf "%02d" m ++ printf "%02d" d ++ printf "%05d" sec+      sec :: Int; datecode :: Int+  let cabal_file = tmpdir </> "Cabal/Cabal.cabal"+  cf0 <- readFile cabal_file+  let Just cf1 = replaceVersionDecl (setVersion datecode) cf0+  writeFile (cabal_file<.>"tmp") cf1+  renameFile (cabal_file<.>"tmp") cabal_file+  return (CommitId commit, CabalSourceDir $ tmpdir </> "Cabal")+  where+    -- If the released version of cabal has 4 components but we use only three+    -- theirs will always be larger than this one here. That's not really+    -- critical though.+    setVersion i (versionBranch -> mj:mi:_:_:[]) =+        Just $ makeVersion $ mj:mi:[i]+    setVersion _ v =+        error $ "unpackCabalHEAD.setVersion: Wrong version format" ++ show v++-- | Replace the version declaration in a cabal file+replaceVersionDecl :: (Version -> Maybe Version) -> String -> Maybe String+replaceVersionDecl ver_fn cf = let+  isVersionDecl ([],t) = "version:" `isPrefixOf` t+  isVersionDecl (i,t) = "\n" `isSuffixOf` i && "version:" `isPrefixOf` t+  Just (before_ver,m) = find isVersionDecl $ splits cf+  Just (ver_decl,after_ver)+    = find (\s -> case s of (_i,'\n':x:_) -> not $ isSpace x; _ -> False)+    $ filter (\(_i,t) -> "\n" `isPrefixOf` t)+    $ splits m+  Just vers0 = dropWhile isSpace <$> stripPrefix "version:" ver_decl+  (vers1,rest) = span (\c -> isDigit c || c == '.') vers0+  Just verp | all isSpace rest = parseVerMay $ vers1 in do+  new_ver <- ver_fn verp+  return $ concat+    [ before_ver, "version: ", showVersion new_ver, after_ver ]+  where+    splits xs = inits xs `zip` tails xs++resolveCabalVersion :: Verbose => CabalVersion -> IO ResolvedCabalVersion+resolveCabalVersion (CabalVersion ver) = return $ CabalVersion ver+resolveCabalVersion (CabalHEAD ()) = do+  out <- readProcess' "git"+    [ "ls-remote", "https://github.com/haskell/cabal.git", "-h", "master" ] ""+  let commit = takeWhile isHexDigit out+  return $ CabalHEAD $ CommitId commit++findCabalFile :: FilePath -> IO (Maybe FilePath)+findCabalFile pkgdir = do+    cfiles <- filter isCabalFile <$> getDirectoryContents pkgdir+    case cfiles of+      [] -> return Nothing+      [cfile] -> return $ Just $ pkgdir </> cfile+      _ -> panicIO $ "Multiple cabal-files found in directory '"+             ++pkgdir++"': " ++ show cfiles+  where+    isCabalFile :: FilePath -> Bool+    isCabalFile f = takeExtension' f == ".cabal"++    takeExtension' :: FilePath -> String+    takeExtension' p =+        if takeFileName p == takeExtension p+          then "" -- just ".cabal" is not a valid cabal file+          else takeExtension p++complainIfNoCabalFile :: FilePath -> Maybe FilePath -> IO FilePath+complainIfNoCabalFile _ (Just cabal_file) = return cabal_file+complainIfNoCabalFile pkgdir Nothing =+  panicIO $ "No cabal file found in package-dir: '"++pkgdir++"'"++bultinCabalVersion :: Version+bultinCabalVersion = parseVer VERSION_Cabal++readSetupConfigHeader :: FilePath -> IO (Maybe UnitHeader)+readSetupConfigHeader file = bracket (openFile file ReadMode) hClose $ \h -> do+  parseSetupHeader <$> BS.hGetLine h++parseSetupHeader :: BS.ByteString -> Maybe UnitHeader+parseSetupHeader header = case BS8.words header of+  ["Saved", "package", "config", "for", pkgId ,+   "written", "by", setupId,+   "using", compId]+    -> UnitHeader+       <$> parsePkgIdBS pkgId+       <*> parsePkgIdBS setupId+       <*> parsePkgIdBS compId+  _ -> Nothing++getCabalVerbosity :: Verbose => Verbosity+getCabalVerbosity+  | ?verbose 2 = normal+  | ?verbose 3 = verbose+  | ?verbose 4 = deafening+  | otherwise = silent

@@ -0,0 +1,99 @@+{-# LANGUAGE GADTs #-}++module CabalHelper.Compiletime.CompPrograms where++import Data.List+import Data.Maybe+import System.Directory+import System.FilePath+import System.IO.Temp++import CabalHelper.Compiletime.Types+import CabalHelper.Compiletime.Cabal (getCabalVerbosity)+import Symlink (createSymbolicLink)++import Distribution.Simple.GHC as GHC (configure)++import qualified Distribution.Simple.Program as ProgDb+  ( lookupProgram, lookupKnownProgram, programPath+  , configureProgram, userMaybeSpecifyPath+  , ghcProgram, ghcPkgProgram, haddockProgram )+import qualified Distribution.Simple.Program.Db as ProgDb++-- | Determine ghc-pkg/haddock path from ghc path+guessCompProgramPaths :: Verbose => Programs -> IO Programs+guessCompProgramPaths progs = do+  let v = getCabalVerbosity+      getMaybeProg' = getMaybeProg progs+      progdb =+        ProgDb.userMaybeSpecifyPath "ghc" (getMaybeProg' ghcProgram) $+        ProgDb.userMaybeSpecifyPath "ghc-pkg" (getMaybeProg' ghcPkgProgram) $+        ProgDb.userMaybeSpecifyPath "haddock" (getMaybeProg' haddockProgram) $+        ProgDb.defaultProgramDb+  (_compiler, _mplatform, progdb1) <- GHC.configure v Nothing Nothing progdb+  let Just haddockKnownProgram = ProgDb.lookupKnownProgram "haddock" progdb1+  progdb2 <- ProgDb.configureProgram v haddockKnownProgram progdb1+  let getProg p = ProgDb.programPath <$> ProgDb.lookupProgram p progdb2+  return progs+    { ghcProgram =+        fromMaybe (ghcProgram progs) $ getProg ProgDb.ghcProgram+    , ghcPkgProgram =+        fromMaybe (ghcPkgProgram progs) $ getProg ProgDb.ghcPkgProgram+    , haddockProgram =+        fromMaybe (haddockProgram progs) $ getProg ProgDb.haddockProgram+    }++getMaybeProg :: Programs -> (Programs -> FilePath) -> Maybe FilePath+getMaybeProg progs fn+    | fn progs == fn defaultPrograms = Nothing+    | otherwise = Just (fn progs)++patchBuildToolProgs :: SProjType pt -> Programs -> IO Programs+patchBuildToolProgs (SCabal _) progs = return progs+  { cabalUnitArgs = concat+    [ maybeToList (("--with-ghc="++) <$> getMaybeProg progs ghcProgram)+    , maybeToList (("--with-ghc-pkg="++) <$> getMaybeProg progs ghcPkgProgram)+    , maybeToList (("--with-haddock="++) <$> getMaybeProg progs haddockProgram)+    ] ++ cabalUnitArgs progs+  }+patchBuildToolProgs SStack progs+  -- optimization; if none of the program paths are non-default we don't+  -- even have to add anything to PATH.+  | ghcProgram progs == "ghc"+  , ghcPkgProgram progs == "ghc-pkg"+  , haddockProgram progs == "haddock"+  = return progs++  -- optimization; if all paths are unqualified and have the same version+  -- postfix Stack's default behaviour works for us.+  | [ghc] <- splitPath (ghcProgram progs)+  , [ghcPkg] <- splitPath (ghcPkgProgram progs)+  , [haddock] <- splitPath (haddockProgram progs)+  , Just ver <- stripPrefix "ghc-" ghc+  , Just ver == stripPrefix "ghc-pkg-" ghcPkg+  , Just ver == stripPrefix "haddock-" haddock+  = return progs+patchBuildToolProgs SStack progs = do+  -- otherwise fall back to creating a symlink farm+  --+  -- This is of course all quite horrible and we would much prefer just+  -- being able to pass executable paths straight through to stack but+  -- currently there is no option to let us do that.+  withSystemTempDirectory "cabal-helper-symlinks" $ \bindir -> do+  createProgSymlink bindir $ ghcProgram progs+  createProgSymlink bindir $ ghcPkgProgram progs+  createProgSymlink bindir $ haddockProgram progs+  return $ progs+    { stackEnv =+        [("PATH", EnvPrepend $ bindir ++ [searchPathSeparator])] +++        stackEnv progs+    }++createProgSymlink :: FilePath -> FilePath -> IO ()+createProgSymlink bindir target+  | [exe] <- splitPath target = do+    Just exe_path <- findExecutable exe+    createSymbolicLink exe_path (bindir </> takeFileName target)+  | otherwise = do+    cwd <- getCurrentDirectory+    createSymbolicLink (cwd </> target) (bindir </> takeFileName target)

@@ -1,18 +1,13 @@ -- cabal-helper: Simple interface to Cabal's configuration state -- Copyright (C) 2017  Daniel Gröber <cabal-helper@dxld.at> ----- This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- (at your option) any later version.+-- SPDX-License-Identifier: Apache-2.0 ----- This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at ----- You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.+--     http://www.apache.org/licenses/LICENSE-2.0  {-# LANGUAGE CPP #-} module CabalHelper.Compiletime.Compat.Environment where

@@ -0,0 +1,36 @@+-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-# LANGUAGE CPP #-}+module CabalHelper.Compiletime.Compat.Parsec+    ( absorbParsecFailure+    , eitherParsec+    ) where++#if MIN_VERSION_Cabal(2,5,0)+import Distribution.Parsec+#else+import qualified Distribution.Compat.ReadP as Dist+import Distribution.Text+#endif++absorbParsecFailure :: String -> Either String a -> a+absorbParsecFailure _ (Right x) = x+absorbParsecFailure ctx (Left err) =+    error $ "Error parsing in '"++ctx++"': " ++ err++#if !MIN_VERSION_Cabal(2,5,0)+eitherParsec :: Text t => String -> Either String t+eitherParsec i =+  case filter ((=="") . snd) $ Dist.readP_to_S parse i of+    (a,""):[] -> Right a+    _ -> Left $ show i+#endif

@@ -1,30 +0,0 @@--- cabal-helper: Simple interface to Cabal's configuration state--- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at>------ This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- (at your option) any later version.------ This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.------ You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.--{-# LANGUAGE CPP #-}-module CabalHelper.Compiletime.Compat.ProgramDb-    ( defaultProgramDb-    , programPath-    , lookupProgram-    , ghcProgram-    , ghcPkgProgram-    ) where--import Distribution.Simple.Program--#if !MIN_VERSION_Cabal(2,0,0)-defaultProgramDb = defaultProgramConfiguration-#endif

@@ -1,18 +1,13 @@ -- cabal-helper: Simple interface to Cabal's configuration state -- Copyright (C) 2017-2018  Daniel Gröber <cabal-helper@dxld.at> ----- This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- (at your option) any later version.+-- SPDX-License-Identifier: Apache-2.0 ----- This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at ----- You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.+--     http://www.apache.org/licenses/LICENSE-2.0  {-# LANGUAGE CPP #-} module CabalHelper.Compiletime.Compat.Version

@@ -1,30 +1,27 @@ -- cabal-helper: Simple interface to Cabal's configuration state -- Copyright (C) 2015-2018  Daniel Gröber <cabal-helper@dxld.at> ----- This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- (at your option) any later version.+-- SPDX-License-Identifier: Apache-2.0 ----- This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at ----- You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.-{-# LANGUAGE RecordWildCards, FlexibleContexts, NamedFieldPuns, DeriveFunctor,-GADTs #-}+--     http://www.apache.org/licenses/LICENSE-2.0 +{-# LANGUAGE DeriveFunctor, GADTs, ScopedTypeVariables #-}+ {-| Module      : CabalHelper.Compiletime.Compile Description : Runtime compilation machinery-License     : GPL-3+License     : Apache-2.0 -}  module CabalHelper.Compiletime.Compile where +import qualified Cabal.Plan as CP import Cabal.Plan+  ( PlanJson(..), PkgId(..), PkgName(..), Ver(..), uPId) import Control.Applicative import Control.Arrow import Control.Exception as E@@ -36,49 +33,52 @@ import Data.Maybe import Data.String import Data.Version-import GHC.IO.Exception (IOErrorType(OtherError)) import Text.Printf-import Text.Read+import qualified System.Clock as Clock import System.Directory import System.FilePath-import System.Process import System.Exit-import System.Environment import System.IO-import System.IO.Error import System.IO.Temp import Prelude - import qualified Data.Text as Text import qualified Data.Map.Strict as Map -import Distribution.System (buildPlatform)-import Distribution.Text (display)+import Distribution.System+  ( buildPlatform )+import Distribution.Text+  ( display ) -import Paths_cabal_helper (version)+import CabalHelper.Compiletime.Cabal import CabalHelper.Compiletime.Data import CabalHelper.Compiletime.Log+import CabalHelper.Compiletime.Program.GHC+import CabalHelper.Compiletime.Program.CabalInstall+import CabalHelper.Compiletime.Sandbox+    ( getSandboxPkgDb ) import CabalHelper.Compiletime.Types+ import CabalHelper.Shared.Common-import CabalHelper.Shared.Sandbox (getSandboxPkgDb) +import Paths_cabal_helper (version)++ data Compile     = CompileWithCabalSource-      { compCabalSourceDir     :: CabalSourceDir-      , compCabalSourceVersion :: Version+      { compCabalSourceDir     :: !CabalSourceDir+      , compCabalSourceVersion :: !Version       }     | CompileWithCabalPackage-      { compPackageDb      :: Maybe PackageDbDir-      , compCabalVersion   :: CabalVersion-      , compPackageDeps    :: [String]-      , compProductTarget  :: CompilationProductScope+      { compPackageSource  :: !GhcPackageSource+      , compCabalVersion   :: !ResolvedCabalVersion+      , compProductTarget  :: !CompilationProductScope       }  data CompPaths = CompPaths-    { compSrcDir  :: FilePath-    , compOutDir  :: FilePath-    , compExePath :: FilePath+    { compBuildDir:: !FilePath+    , compOutDir  :: !FilePath+    , compExePath :: !FilePath     }  -- | The Helper executable we produce as a compilation product can either be@@ -87,110 +87,207 @@ -- executable. data CompilationProductScope = CPSGlobal | CPSProject -compileHelper :: Options -> Version -> FilePath -> Maybe (PlanJson, FilePath) -> FilePath -> IO (Either ExitCode FilePath)-compileHelper opts hdrCabalVersion projdir mnewstyle distdir = do-  ghcVer <- ghcVersion opts-  Just (prepare, comp) <- runMaybeT $ msum $-    case oCabalPkgDb opts of-      Nothing ->-        [ compileCabalSource-        , compileNewBuild ghcVer-        , compileSandbox ghcVer-        , compileGlobal-        , MaybeT $ Just <$> compileWithCabalInPrivatePkgDb-        ]-      Just db ->-          [ return $ (return (), compileWithPkg (Just db) hdrCabalVersion CPSProject)-        ]+type CompHelperEnv = CompHelperEnv' CabalVersion+data CompHelperEnv' cv = CompHelperEnv+  { cheCabalVer :: !cv+  , chePkgDb    :: !(Maybe PackageDbDir)+  -- ^ A package-db where we are guaranteed to find Cabal-`cheCabalVer`.+  , cheProjDir  :: !FilePath+  , chePlanJson :: !(Maybe PlanJson)+  , cheDistV2   :: !(Maybe FilePath)+  , cheProjLocalCacheDir :: FilePath+  } -  appdir <- appCacheDir+compileHelper+    :: Env => CompHelperEnv -> IO (Either ExitCode FilePath)+compileHelper che@CompHelperEnv {cheCabalVer} = do+  withSystemTempDirectory "cabal-helper.compile-tmp" $ \tmpdir -> do+    ucv <- unpackCabal cheCabalVer tmpdir+    compileHelper' che { cheCabalVer = ucv } -  let cp@CompPaths {compExePath} = compPaths appdir distdir comp-  exists <- doesFileExist compExePath-  if exists+compileHelper'+    :: Env+    => CompHelperEnv' UnpackedCabalVersion+    -> IO (Either ExitCode FilePath)+compileHelper' CompHelperEnv {..} = do+  ghcVer <- ghcVersion+  Just (prepare, comp) <- case cheCabalVer of+    cabalVer@CabalHEAD {} -> runMaybeT $ msum  $ map (\f -> f ghcVer cabalVer)+      [ compileWithCabalV2GhcEnv'+      , compileWithCabalInPrivatePkgDb'+      ]+    CabalVersion cabalVerPlain -> do+      runMaybeT $ msum $ map (\f -> f ghcVer cabalVerPlain) $+        case chePkgDb of+          Nothing ->+            [ compileWithCabalV2Inplace+            , compileWithCabalV2GhcEnv+            , compileCabalSource+            , compileSandbox+            , compileGlobal+            , compileWithCabalInPrivatePkgDb+            ]+          Just db ->+            [ ((.).(.)) liftIO (compilePkgDb db)+            ]+  appdir <- appCacheDir+  let cp@CompPaths {compExePath} = compPaths appdir cheProjLocalCacheDir comp+  helper_exists <- doesFileExist compExePath+  rv <- if helper_exists     then do-      vLog opts $ "helper already compiled, using exe: "++compExePath+      vLog $ "helper already compiled, using exe: "++compExePath       return (Right compExePath)     else do-      vLog opts $ "helper exe does not exist, compiling "++compExePath-      prepare >> compile comp cp opts+      vLog $ "helper exe does not exist, compiling "++compExePath+      prepare >> compile cp comp+  return rv - where++  where    logMsg = "using helper compiled with Cabal from " --- for relaxed deps: find (sameMajorVersionAs hdrCabalVersion) . reverse . sort+-- for relaxed deps: find (sameMajorVersionAs cheCabalVer) . reverse . sort +   compilePkgDb db _ghcVer cabalVer  = return $+       (,)+         (pure ())+         CompileWithCabalPackage+           { compPackageSource = GPSPackageDBs [db]+           , compCabalVersion  = CabalVersion cabalVer+           , compProductTarget = CPSProject+           }+    -- | Check if this version is globally available-   compileGlobal :: MaybeT IO (IO (), Compile)-   compileGlobal = do-       cabal_versions <- listCabalVersions opts-       ver <- MaybeT $ return $ find (== hdrCabalVersion) cabal_versions-       vLog opts $ logMsg ++ "user/global package-db"-       return $ (return (), compileWithPkg Nothing ver CPSGlobal)+   compileGlobal :: Env => gv -> Version -> MaybeT IO (IO (), Compile)+   compileGlobal _ghcVer cabalVer = do+       cabal_versions <- listCabalVersions Nothing+       _ <- MaybeT $ return $ find (== cabalVer) cabal_versions+       vLog $ logMsg ++ "user/global package-db"+       return $ (return (), compileWithPkg GPSAmbient cabalVer CPSGlobal)     -- | Check if this version is available in the project sandbox-   compileSandbox :: Version -> MaybeT IO (IO (), Compile)-   compileSandbox ghcVer = do-       let mdb_path = getSandboxPkgDb projdir (display buildPlatform) ghcVer+   compileSandbox :: Env => GhcVersion -> Version -> MaybeT IO (IO (), Compile)+   compileSandbox  ghcVer cabalVer = do+       let mdb_path = getSandboxPkgDb (display buildPlatform) ghcVer cheProjDir        sandbox <- PackageDbDir <$> MaybeT mdb_path-       cabal_versions <- listCabalVersions' opts (Just sandbox)-       ver <- MaybeT $ return $ find (== hdrCabalVersion) cabal_versions-       vLog opts $ logMsg ++ "sandbox package-db"-       return $ (return (), compileWithPkg (Just sandbox) ver CPSProject)+       cabal_versions <- listCabalVersions (Just sandbox)+       _ <- MaybeT $ return $ find (== cabalVer) cabal_versions+       vLog $ logMsg ++ "sandbox package-db"+       return $ (return (), compileWithPkg (GPSPackageDBs [sandbox]) cabalVer CPSProject) -   compileNewBuild :: Version -> MaybeT IO (IO (), Compile)-   compileNewBuild ghcVer = do-       (PlanJson {pjUnits}, distdir_newstyle) <- maybe mzero pure mnewstyle+   -- | Check if the requested Cabal version is available in a v2-build+   -- project's inplace package-db.+   --+   -- This is likely only the case if Cabal was vendored by this project or if+   -- we're operating on Cabal itself!+   compileWithCabalV2Inplace :: Env => GhcVersion -> Version -> MaybeT IO (IO (), Compile)+   compileWithCabalV2Inplace ghcVer cabalVer = do+       -- TODO: Test coverage! Neither compile-test nor ghc-session test out+       -- this code path+       PlanJson {pjUnits} <- maybe mzero pure chePlanJson+       distdir_newstyle   <- maybe mzero pure cheDistV2        let cabal_pkgid =-               PkgId (PkgName (Text.pack "Cabal"))-                     (Ver $ versionBranch hdrCabalVersion)+             PkgId (PkgName (Text.pack "Cabal")) (Ver $ versionBranch cabalVer)            mcabal_unit = listToMaybe $-             Map.elems $ Map.filter (\Unit {..} -> uPId == cabal_pkgid) pjUnits-       Unit {} <- maybe mzero pure mcabal_unit+             Map.elems $ Map.filter (\CP.Unit{..} -> uPId == cabal_pkgid) pjUnits+       CP.Unit {} <- maybe mzero pure mcabal_unit        let inplace_db_path = distdir_newstyle-             </> "packagedb" </> ("ghc-" ++ showVersion ghcVer)+             </> "packagedb" </> ("ghc-" ++ showGhcVersion ghcVer)            inplace_db = PackageDbDir inplace_db_path-       cabal_versions <- listCabalVersions' opts (Just inplace_db)-       ver <- MaybeT $ return $ find (== hdrCabalVersion) cabal_versions-       vLog opts $ logMsg ++ "v2-build package-db " ++ inplace_db_path-       return $ (return (), compileWithPkg (Just inplace_db) ver CPSProject)+       cabal_versions <- listCabalVersions (Just inplace_db)+       _ <- MaybeT $ return $ find (== cabalVer) cabal_versions+       vLog $ logMsg ++ "v2-build package-db " ++ inplace_db_path+       return $ (return (), compileWithPkg (GPSPackageDBs [inplace_db]) cabalVer CPSProject) +   compileWithCabalV2GhcEnv :: Env => GhcVersion -> Version -> MaybeT IO (IO (), Compile)+   compileWithCabalV2GhcEnv ghcVer cabalVer =+     compileWithCabalV2GhcEnv' ghcVer (CabalVersion cabalVer)++   -- TODO: Support using existing ghc-environments too! That's mostly+   -- relevant for when you want to use a development version of+   -- cabal-install since that will depend on an unreleased version of+   -- Cabal we cannot new-install just like that.++   -- | If this is a v2-build project it makes sense to use @v2-install@ for+   -- installing Cabal as this will use the @~/.cabal/store@. We use+   -- @--package-env@ to instruct cabal to not meddle with the user's package+   -- environment.+   compileWithCabalV2GhcEnv' :: Env => GhcVersion -> UnpackedCabalVersion -> MaybeT IO (IO (), Compile)+   compileWithCabalV2GhcEnv' ghcVer cabalVer = do+       _ <- maybe mzero pure cheDistV2 -- bail if this isn't a v2-build project+       CabalInstallVersion instVer <- liftIO cabalInstallVersion+       guard $ instVer >= (Version [2,4,1,0] [])+       --  ^ didn't test with older versions+       guard $ ghcVer  >= (GhcVersion (Version [8,0] []))+       env@(PackageEnvFile env_file) <- liftIO $+         getPrivateCabalPkgEnv ghcVer $ unpackedToResolvedCabalVersion cabalVer+       vLog $ logMsg ++ "v2-build package-env " ++ env_file+       return $ (,)+         (prepare env)+         CompileWithCabalPackage+           { compPackageSource = GPSPackageEnv env+           , compCabalVersion  = unpackedToResolvedCabalVersion cabalVer+           , compProductTarget = CPSGlobal+           }+     where+       prepare env = do+         -- exists_in_env <- liftIO $ cabalVersionExistsInPkgDb cheCabalVer db+         void $ installCabalLibV2 ghcVer cheCabalVer env `E.catch`+           \(ex :: IOError) -> print ex >>+               case cheCabalVer of+                 CabalHEAD _ -> panicIO "Installing Cabal HEAD failed."+                 CabalVersion ver -> errorInstallCabal (CabalVersion ver)++++   compileWithCabalInPrivatePkgDb+       :: (Env, MonadIO m) => GhcVersion -> Version -> m (IO (), Compile)+   compileWithCabalInPrivatePkgDb ghcVer cabalVer =+       compileWithCabalInPrivatePkgDb' ghcVer (CabalVersion cabalVer)+    -- | Compile the requested Cabal version into an isolated package-db if it's    -- not there already-   compileWithCabalInPrivatePkgDb :: IO (IO (), Compile)-   compileWithCabalInPrivatePkgDb = do-       db@(PackageDbDir db_path)-           <- getPrivateCabalPkgDb opts (CabalVersion hdrCabalVersion)-       vLog opts $ logMsg ++ "private package-db in " ++ db_path-       return (prepare db, compileWithPkg (Just db) hdrCabalVersion CPSGlobal)+   compileWithCabalInPrivatePkgDb'+       :: (Env, MonadIO m) => GhcVersion -> UnpackedCabalVersion -> m (IO (), Compile)+   compileWithCabalInPrivatePkgDb' ghcVer cabalVer = do+       db@(PackageDbDir db_path) <- liftIO $+         getPrivateCabalPkgDb $ unpackedToResolvedCabalVersion cabalVer+       vLog $ logMsg ++ "private package-db in " ++ db_path+       return $ (,)+         (prepare db)+         CompileWithCabalPackage+           { compPackageSource = GPSPackageDBs [db]+           , compCabalVersion  = unpackedToResolvedCabalVersion cabalVer+           , compProductTarget = CPSGlobal+           }      where        prepare db = do-         db_exists <- liftIO $ cabalVersionExistsInPkgDb opts hdrCabalVersion db+         db_exists <- liftIO $ cabalVersionExistsInPkgDb cabalVer db          when (not db_exists) $-           void $ installCabal opts (Right hdrCabalVersion) `E.catch`-             \(SomeException _) -> errorInstallCabal hdrCabalVersion distdir+           void (installCabalLibV1 ghcVer cabalVer) `E.catch`+             \(SomeException _) -> errorInstallCabal cabalVer     -- | See if we're in a cabal source tree-   compileCabalSource :: MaybeT IO (IO (), Compile)-   compileCabalSource = do-       let cabalFile = projdir </> "Cabal.cabal"+   --   compileCabalSource :: Env => MaybeT IO (IO (), Compile)+   compileCabalSource _ghcVer _cabalVer = do+       let cabalFile = cheProjDir </> "Cabal.cabal"        cabalSrc <- liftIO $ doesFileExist cabalFile-       let projdir' = CabalSourceDir projdir+       let projdir = CabalSourceDir cheProjDir        case cabalSrc of          False -> mzero          True -> do-           vLog opts $ "projdir looks like Cabal source tree (Cabal.cabal exists)"+           vLog $ "projdir looks like Cabal source tree (Cabal.cabal exists)"            cf <- liftIO $ readFile cabalFile            let buildType = cabalFileBuildType cf                ver       = cabalFileVersion cf             case buildType of              "simple" -> do-                 vLog opts $ "Cabal source tree is build-type:simple, moving on"+                 vLog $ "Cabal source tree is build-type:simple, moving on"                  mzero              "custom" -> do-                 vLog opts $ "compiling helper with local Cabal source tree"-                 return $ (return (), compileWithCabalSource projdir' ver)+                 vLog $ "compiling helper with local Cabal source tree"+                 return $ (return (), compileWithCabalSource projdir ver)              _ -> error $ "compileCabalSource: unknown build-type: '"++buildType++"'"     compileWithCabalSource srcDir ver =@@ -199,64 +296,64 @@           , compCabalSourceVersion   = ver           } -   compileWithPkg mdb ver target =+   compileWithPkg pkg_src ver target =        CompileWithCabalPackage-          { compPackageDb            = mdb+          { compPackageSource        = pkg_src           , compCabalVersion         = CabalVersion ver-          , compPackageDeps          = [cabalPkgId ver]           , compProductTarget        = target           } -   cabalPkgId v = "Cabal-" ++ showVersion v--compile :: Compile -> CompPaths -> Options -> IO (Either ExitCode FilePath)-compile comp paths@CompPaths {..} opts@Options {..} = do+compile :: Env => CompPaths -> Compile -> IO (Either ExitCode FilePath)+compile paths@CompPaths {..} comp = do     createDirectoryIfMissing True compOutDir-    createHelperSources compSrcDir+    createHelperSources compBuildDir -    vLog opts $ "compSrcDir: " ++ compSrcDir-    vLog opts $ "compOutDir: " ++ compOutDir-    vLog opts $ "compExePath: " ++ compExePath+    vLog $ "compBuildDir: " ++ compBuildDir+    vLog $ "compOutDir: " ++ compOutDir+    vLog $ "compExePath: " ++ compExePath -    invokeGhc opts $ compGhcInvocation comp paths+    invokeGhc $ compGhcInvocation comp paths  compPaths :: FilePath -> FilePath -> Compile -> CompPaths-compPaths appdir distdir c =-    case c of-      CompileWithCabalPackage {compProductTarget=CPSGlobal,..} -> CompPaths {..}+compPaths appdir proj_local_cachedir c =+  case c of+    CompileWithCabalPackage+      { compProductTarget=CPSGlobal+      , compCabalVersion+      } -> CompPaths {..}         where-          compSrcDir  = appdir </> exeName compCabalVersion <.> "build"-          compOutDir  = compSrcDir-          compExePath = appdir </> exeName compCabalVersion--      CompileWithCabalPackage {compProductTarget=CPSProject,..} -> distdirPaths-      CompileWithCabalSource {..} -> distdirPaths+          compBuildDir =+            appdir </> exeName compCabalVersion ++ "--" ++ sourceHash <.> "build"+          compOutDir  = compBuildDir+          compExePath = compBuildDir </> "cabal-helper"+    CompileWithCabalPackage {compProductTarget=CPSProject} ->+        projLocalCachedirPaths+    CompileWithCabalSource {} ->+        projLocalCachedirPaths   where-    distdirPaths = CompPaths {..}+    projLocalCachedirPaths = CompPaths {..}         where-          compSrcDir  = distdir </> "cabal-helper"-          compOutDir  = compSrcDir+          compBuildDir = proj_local_cachedir </> "cabal-helper"+          compOutDir  = compBuildDir           compExePath = compOutDir </> "cabal-helper" -data GhcInvocation = GhcInvocation-    { giOutDir          :: FilePath-    , giOutput          :: FilePath-    , giCPPOptions      :: [String]-    , giPackageDBs      :: [PackageDbDir]-    , giIncludeDirs     :: [FilePath]-    , giHideAllPackages :: Bool-    , giPackages        :: [String]-    , giWarningFlags    :: [String]-    , giInputs          :: [String]-    }+exeName :: ResolvedCabalVersion -> String+exeName (CabalHEAD commitid) = intercalate "--"+  [ "cabal-helper-" ++ showVersion version+  , "Cabal-HEAD" ++ unCommitId commitid+  ]+exeName CabalVersion {cvVersion} = intercalate "--"+  [ "cabal-helper-" ++ showVersion version+  , "Cabal-" ++ showVersion cvVersion+  ]  compGhcInvocation :: Compile -> CompPaths -> GhcInvocation compGhcInvocation comp CompPaths {..} =     case comp of       CompileWithCabalSource {..} ->         GhcInvocation-          { giIncludeDirs = [compSrcDir, unCabalSourceDir compCabalSourceDir]-          , giPackageDBs  = []+          { giIncludeDirs = [compBuildDir, unCabalSourceDir compCabalSourceDir]+          , giPackageSource = GPSAmbient           , giHideAllPackages = False           , giPackages    = []           , giCPPOptions = cppOptions compCabalSourceVersion@@ -265,8 +362,8 @@           }       CompileWithCabalPackage {..} ->         GhcInvocation-          { giIncludeDirs = [compSrcDir]-          , giPackageDBs = maybeToList compPackageDb+          { giIncludeDirs = [compBuildDir]+          , giPackageSource = compPackageSource           , giHideAllPackages = True           , giPackages =               [ "base"@@ -276,7 +373,10 @@               , "process"               , "bytestring"               , "ghc-prim"-              ] ++ compPackageDeps+              , case compCabalVersion of+                  CabalHEAD {} -> "Cabal"+                  CabalVersion ver -> "Cabal-" ++ showVersion ver+              ]           , giCPPOptions = cppOptions (unCabalVersion compCabalVersion)           , ..           }@@ -293,7 +393,7 @@     giOutDir = compOutDir     giOutput = compExePath     giWarningFlags = [ "-w" ] -- no point in bothering end users with warnings-    giInputs = [compSrcDir</>"CabalHelper"</>"Runtime"</>"Main.hs"]+    giInputs = [compBuildDir</>"CabalHelper"</>"Runtime"</>"Main.hs"]  cabalVersionMacro :: Version -> String cabalVersionMacro (Version vs _) =@@ -309,119 +409,6 @@ cabalMinVersionMacro _ =     error "cabalMinVersionMacro: Version must have at least 3 components" -invokeGhc :: Options -> GhcInvocation -> IO (Either ExitCode FilePath)-invokeGhc opts@Options {..} GhcInvocation {..} = do-  rv <- callProcessStderr' opts Nothing oGhcProgram $ concat-    [ [ "-outputdir", giOutDir-      , "-o", giOutput-      ]-    , map ("-optP"++) giCPPOptions-    , map ("-package-conf="++) $ unPackageDbDir <$> giPackageDBs-    , map ("-i"++) $ nub $ "" : giIncludeDirs-    , if giHideAllPackages then ["-hide-all-packages"] else []-    , concatMap (\p -> ["-package", p]) giPackages-    , giWarningFlags-    , ["--make"]-    , giInputs-    ]-  return $-    case rv of-      ExitSuccess -> Right giOutput-      e@(ExitFailure _) -> Left e----- | Cabal library version we're compiling the helper exe against.-data CabalVersion-    = CabalHEAD  { cvCommitId   :: CommitId }-    | CabalVersion { cabalVersion :: Version }--newtype CommitId = CommitId { unCommitId :: String }--exeName :: CabalVersion -> String-exeName (CabalHEAD commitid) = intercalate "-"-    [ "cabal-helper" ++ showVersion version-    , "CabalHEAD" ++ unCommitId commitid-    ]-exeName CabalVersion {cabalVersion} = intercalate "-"-    [ "cabal-helper" ++ showVersion version-    , "Cabal" ++ showVersion cabalVersion-    ]--readProcess' :: Options -> FilePath -> [String] -> String -> IO String-readProcess' opts@Options{..} exe args inp = do-  vLog opts $ intercalate " " $ map formatProcessArg (oGhcPkgProgram:args)-  outp <- readProcess exe args inp-  vLog opts $ unlines $ map ("=> "++) $ lines outp-  return outp--callProcessStderr'-    :: Options -> Maybe FilePath -> FilePath -> [String] -> IO ExitCode-callProcessStderr' opts mwd exe args = do-  let cd = case mwd of-             Nothing -> []; Just wd -> [ "cd", formatProcessArg wd++";" ]-  vLog opts $ intercalate " " $ cd ++ map formatProcessArg (exe:args)-  (_, _, _, h) <- createProcess (proc exe args) { std_out = UseHandle stderr-                                                , cwd = mwd }-  waitForProcess h--callProcessStderr :: Options -> Maybe FilePath -> FilePath -> [String] -> IO ()-callProcessStderr opts mwd exe args = do-  rv <- callProcessStderr' opts mwd exe args-  case rv of-    ExitSuccess -> return ()-    ExitFailure v -> processFailedException "callProcessStderr" exe args v--processFailedException :: String -> String -> [String] -> Int -> IO a-processFailedException fn exe args rv =-    ioError $ mkIOError OtherError msg Nothing Nothing-  where-    msg = concat [ fn, ": ", exe, " "-                 , intercalate " " (map formatProcessArg args)-                 , " (exit " ++ show rv ++ ")"-                 ]--formatProcessArg :: String -> String-formatProcessArg xs-    | any isSpace xs = "'"++ xs ++"'"-    | otherwise      = xs--data HEAD = HEAD deriving (Eq, Show)--installCabal :: Options -> Either HEAD Version -> IO (PackageDbDir, CabalVersion)-installCabal opts ever = do-  appdir <- appCacheDir-  let message ver = do-      let sver = showVersion ver-      hPutStr stderr $ printf "\-\cabal-helper-wrapper: Installing a private copy of Cabal because we couldn't\n\-\find the right version in your global/user package-db, this might take a\n\-\while but will only happen once per Cabal version you're using.\n\-\\n\-\If anything goes horribly wrong just delete this directory and try again:\n\-\    %s\n\-\\n\-\If you want to avoid this automatic installation altogether install\n\-\version %s of Cabal manually (into your user or global package-db):\n\-\    $ cabal install Cabal --constraint \"Cabal == %s\"\n\-\\n\-\Installing Cabal %s ...\n" appdir sver sver sver--  withSystemTempDirectory "cabal-helper-Cabal-source" $ \tmpdir -> do-    (srcdir, cabalVer) <- case ever of-      Left HEAD -> do-        second CabalHEAD <$> unpackCabalHEAD opts tmpdir-      Right ver -> do-        message ver-        let patch = fromMaybe nopCabalPatchDescription $-              find ((ver`elem`) . cpdVersions) patchyCabalVersions-        (,) <$> unpackPatchedCabal opts ver tmpdir patch <*> pure (CabalVersion ver)--    db <- createPkgDb opts cabalVer--    runCabalInstall opts db srcdir ever--    return (db, cabalVer)- {- TODO: If the Cabal version we want to install is less than or equal to one we have available, either through act-as-setup or in a package-db we should be able@@ -435,200 +422,11 @@  -} -runCabalInstall-    :: Options -> PackageDbDir -> CabalSourceDir -> Either HEAD Version-> IO ()-runCabalInstall opts (PackageDbDir db) (CabalSourceDir srcdir) ever = do-  civ@CabalInstallVersion {..} <- cabalInstallVersion opts-  cabal_opts <- return $ concat-      [-        [ "--package-db=clear"-        , "--package-db=global"-        , "--package-db=" ++ db-        , "--prefix=" ++ db </> "prefix"-        ]-        , withGHCProgramOptions opts-        , if cabalInstallVer >= Version [1,20,0,0] []-             then ["--no-require-sandbox"]-             else []-        , [ "install", srcdir ]-        , if oVerbose opts-            then ["-v"]-            else []-        , [ "--only-dependencies" ]-      ]--  callProcessStderr opts (Just "/") (oCabalProgram opts) cabal_opts--  runSetupHs opts db srcdir ever civ--  hPutStrLn stderr "done"--withGHCProgramOptions :: Options -> [String]-withGHCProgramOptions opts =-    concat [ [ "--with-ghc=" ++ oGhcProgram opts ]-           , if oGhcPkgProgram opts /= oGhcPkgProgram defaultOptions-               then [ "--with-ghc-pkg=" ++ oGhcPkgProgram opts ]-               else []-           ]--runSetupHs-    :: Options-    -> FilePath-    -> FilePath-    -> Either HEAD Version-    -> CabalInstallVersion-    -> IO ()-runSetupHs opts@Options {..} db srcdir ever CabalInstallVersion {..}-    | cabalInstallVer >= parseVer "1.24" = do-      go $ \args -> callProcessStderr opts (Just srcdir) oCabalProgram $-        [ "act-as-setup", "--" ] ++ args-    | otherwise = do-      SetupProgram {..} <- compileSetupHs opts db srcdir-      go $ callProcessStderr opts (Just srcdir) setupProgram-  where-    parmake_opt :: Maybe Int -> [String]-    parmake_opt nproc'-        | Left _ <- ever = ["-j"++nproc]-        | Right ver <- ever,  ver >= Version [1,20] [] = ["-j"++nproc]-        | otherwise = []-      where-        nproc = fromMaybe "" $ show <$> nproc'--    go :: ([String] -> IO ()) -> IO ()-    go run = do-      run $ [ "configure", "--package-db", db, "--prefix", db </> "prefix" ]-              ++ withGHCProgramOptions opts-      mnproc <- join . fmap readMaybe <$> lookupEnv "NPROC"-      run $ [ "build" ] ++ parmake_opt mnproc-      run [ "copy" ]-      run [ "register" ]-----newtype SetupProgram = SetupProgram { setupProgram :: FilePath }-compileSetupHs :: Options -> FilePath -> FilePath -> IO SetupProgram-compileSetupHs opts db srcdir = do-  ver <- ghcVersion opts-  let no_version_macros-        | ver >= Version [8] [] = [ "-fno-version-macros" ]-        | otherwise             = []--      file = srcdir </> "Setup"--  callProcessStderr opts (Just srcdir) (oGhcProgram opts) $ concat-    [ [ "--make"-      , "-package-conf", db-      ]-    , no_version_macros-    , [ file <.> "hs"-      , "-o", file-      ]-    ]-  return $ SetupProgram file--data CabalPatchDescription = CabalPatchDescription {-      cpdVersions      :: [Version],-      cpdUnpackVariant :: UnpackCabalVariant,-      cpdPatchFn       :: FilePath -> IO ()-    }-nopCabalPatchDescription :: CabalPatchDescription-nopCabalPatchDescription = CabalPatchDescription [] LatestRevision (const (return ()))--patchyCabalVersions :: [CabalPatchDescription]-patchyCabalVersions = [-  let versions  = [ Version [1,18,1] [] ]-      variant   = Pristine-      patch     = fixArrayConstraint-  in CabalPatchDescription versions variant patch,--  let versions  = [ Version [1,18,0] [] ]-      variant   = Pristine-      patch dir = do-        fixArrayConstraint dir-        fixOrphanInstance dir-  in CabalPatchDescription versions variant patch,--  let versions  = [ Version [1,24,1,0] [] ]-      variant   = Pristine-      patch _   = return ()-  in CabalPatchDescription versions variant patch-  ]- where-   fixArrayConstraint dir = do-     let cabalFile    = dir </> "Cabal.cabal"-         cabalFileTmp = cabalFile ++ ".tmp"--     cf <- readFile cabalFile-     writeFile cabalFileTmp $ replace "&& < 0.5" "&& < 0.6" cf-     renameFile cabalFileTmp cabalFile--   fixOrphanInstance dir = do-     let versionFile    = dir </> "Distribution/Version.hs"-         versionFileTmp = versionFile ++ ".tmp"--     let languagePragma =-           "{-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}"-         languagePragmaCPP =-           "{-# LANGUAGE CPP, DeriveDataTypeable, StandaloneDeriving #-}"--         derivingDataVersion =-           "deriving instance Data Version"-         derivingDataVersionCPP = unlines [-             "#if __GLASGOW_HASKELL__ < 707",-             derivingDataVersion,-             "#endif"-           ]--     vf <- readFile versionFile-     writeFile versionFileTmp-       $ replace derivingDataVersion derivingDataVersionCPP-       $ replace languagePragma languagePragmaCPP vf--     renameFile versionFileTmp versionFile--unpackPatchedCabal-    :: Options-    -> Version-    -> FilePath-    -> CabalPatchDescription-    -> IO CabalSourceDir-unpackPatchedCabal opts cabalVer tmpdir (CabalPatchDescription _ variant patch) = do-  res@(CabalSourceDir dir) <- unpackCabal opts cabalVer tmpdir variant-  patch dir-  return res--data UnpackCabalVariant = Pristine | LatestRevision-newtype CabalSourceDir = CabalSourceDir { unCabalSourceDir :: FilePath }-unpackCabal-    :: Options -> Version -> FilePath -> UnpackCabalVariant -> IO CabalSourceDir-unpackCabal opts cabalVer tmpdir variant = do-  let cabal = "Cabal-" ++ showVersion cabalVer-      dir = tmpdir </> cabal-      variant_opts = case variant of Pristine -> [ "--pristine" ]; _ -> []-      args = [ "get", cabal ] ++ variant_opts-  callProcessStderr opts (Just tmpdir) (oCabalProgram opts) args-  return $ CabalSourceDir dir--unpackCabalHEAD :: Options -> FilePath -> IO (CabalSourceDir, CommitId)-unpackCabalHEAD opts tmpdir = do-  let dir = tmpdir </> "cabal-head.git"-      url = "https://github.com/haskell/cabal.git"-  ExitSuccess <- rawSystem "git" [ "clone", "--depth=1", url, dir]-  commit <--      withDirectory_ dir $ trim <$> readProcess' opts "git" ["rev-parse", "HEAD"] ""-  return (CabalSourceDir $ dir </> "Cabal", CommitId commit)- where-   withDirectory_ :: FilePath -> IO a -> IO a-   withDirectory_ dir action =-       bracket-         (liftIO getCurrentDirectory)-         (liftIO . setCurrentDirectory)-         (\_ -> liftIO (setCurrentDirectory dir) >> action)--errorInstallCabal :: Version -> FilePath -> IO a-errorInstallCabal cabalVer _distdir = panicIO $ printf "\-\Installing Cabal version %s failed.\n\+errorInstallCabal :: CabalVersion' a -> IO b+errorInstallCabal (CabalHEAD _) =+  error "cabal-helper: Installing Cabal HEAD failed."+errorInstallCabal (CabalVersion cabalVer) = panicIO $ printf "\+\cabal-helper: Installing Cabal version %s failed.\n\ \\n\ \You have the following choices to fix this:\n\ \\n\@@ -637,8 +435,8 @@ \        $ cabal clean && cabal configure\n\ \\n\ \- If that fails you can try to install the version of Cabal mentioned above\n\-\  into your global/user package-db somehow, you'll probably have to fix\n\-\  something otherwise it wouldn't have failed above:\n\+\  into your global/user package-db somehow, though you'll probably have to\n\+\  fix something otherwise it wouldn't have failed above:\n\ \        $ cabal install Cabal --constraint 'Cabal == %s'\n\ \\n\ \- If you're using `Build-Type: Simple`:\n\@@ -660,65 +458,6 @@ \\n" sver sver  where    sver = showVersion cabalVer--listCabalVersions :: Options -> MaybeT IO [Version]-listCabalVersions opts = listCabalVersions' opts Nothing--listCabalVersions' :: Options -> Maybe PackageDbDir -> MaybeT IO [Version]-listCabalVersions' opts@Options {..} mdb = do-  case mdb of-    Nothing -> mzero-    Just (PackageDbDir db_path) -> do-      exists <- liftIO $ doesDirectoryExist db_path-      case exists of-        False -> mzero-        True  -> MaybeT $ logIOError opts "listCabalVersions'" $ Just <$> do-          let mdbopt = ("--package-conf="++) <$> unPackageDbDir <$> mdb-              args = ["list", "--simple-output", "Cabal"] ++ maybeToList mdbopt--          catMaybes . map (fmap snd . parsePkgId . fromString) . words-                   <$> readProcess' opts oGhcPkgProgram args ""--cabalVersionExistsInPkgDb :: Options -> Version -> PackageDbDir -> IO Bool-cabalVersionExistsInPkgDb opts cabalVer db@(PackageDbDir db_path) = do-  exists <- doesDirectoryExist db_path-  case exists of-    False -> return False-    True -> fromMaybe False <$> runMaybeT (do-      vers <- listCabalVersions' opts (Just db)-      return $ cabalVer `elem` vers)--ghcVersion :: Options -> IO Version-ghcVersion opts@Options {..} = do-    parseVer . trim <$> readProcess' opts oGhcProgram ["--numeric-version"] ""--ghcPkgVersion :: Options -> IO Version-ghcPkgVersion opts@Options {..} = do-    parseVer . trim . dropWhile (not . isDigit) <$> readProcess' opts oGhcPkgProgram ["--version"] ""--newtype CabalInstallVersion = CabalInstallVersion { cabalInstallVer :: Version }-cabalInstallVersion :: Options -> IO CabalInstallVersion-cabalInstallVersion opts@Options {..} = do-    CabalInstallVersion . parseVer . trim-      <$> readProcess' opts oCabalProgram ["--numeric-version"] ""--createPkgDb :: Options -> CabalVersion -> IO PackageDbDir-createPkgDb opts@Options {..} cabalVer = do-  db@(PackageDbDir db_path) <- getPrivateCabalPkgDb opts cabalVer-  exists <- doesDirectoryExist db_path-  when (not exists) $ callProcessStderr opts Nothing oGhcPkgProgram ["init", db_path]-  return db--getPrivateCabalPkgDb :: Options -> CabalVersion -> IO PackageDbDir-getPrivateCabalPkgDb opts cabalVer = do-  appdir <- appCacheDir-  ghcVer <- ghcVersion opts-  let db_path = appdir </> exeName cabalVer-                ++ "-ghc" ++ showVersion ghcVer-                ++ ".package-db"-  return $ PackageDbDir db_path---- "Cabal" ++ ver ++ "-ghc" ++ showVersion ghcVer  -- | Find @version: XXX@ delcaration in a cabal file cabalFileVersion :: String -> Version

@@ -1,18 +1,13 @@ -- cabal-helper: Simple interface to Cabal's configuration state -- Copyright (C) 2015-2017  Daniel Gröber <cabal-helper@dxld.at> ----- This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- (at your option) any later version.+-- SPDX-License-Identifier: Apache-2.0 ----- This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at ----- You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.+--     http://www.apache.org/licenses/LICENSE-2.0  {-# LANGUAGE TemplateHaskell, ScopedTypeVariables #-} {-# OPTIONS_GHC -fforce-recomp #-}@@ -20,16 +15,20 @@ {-| Module      : CabalHelper.Compiletime.Data Description : Embeds source code for runtime component using TH-License     : GPL-3+License     : Apache-2.0 -}  module CabalHelper.Compiletime.Data where  import Control.Monad import Control.Monad.IO.Class+import Data.Digest.Pure.SHA import Data.Functor+import Data.List import qualified Data.ByteString as BS import qualified Data.ByteString.UTF8 as UTF8+import qualified Data.ByteString.Lazy as LBS+import qualified Data.ByteString.Lazy.UTF8 as LUTF8 import Language.Haskell.TH import System.Directory import System.FilePath@@ -71,11 +70,32 @@         BS.writeFile path $ UTF8.fromString src         setFileTimes path modtime modtime +sourceHash :: String+sourceHash  = fst runtimeSources  sourceFiles :: [(FilePath, String)]-sourceFiles =-  [ ("Runtime/Main.hs",     $(LitE . StringL <$> runIO (UTF8.toString <$> BS.readFile "src/CabalHelper/Runtime/Main.hs")))-  , ("Shared/Common.hs",    $(LitE . StringL <$> runIO (UTF8.toString <$> BS.readFile "src/CabalHelper/Shared/Common.hs")))-  , ("Shared/Sandbox.hs",   $(LitE . StringL <$> runIO (UTF8.toString <$> BS.readFile "src/CabalHelper/Shared/Sandbox.hs")))-  , ("Shared/InterfaceTypes.hs",     $(LitE . StringL <$> runIO (UTF8.toString <$> BS.readFile "src/CabalHelper/Shared/InterfaceTypes.hs")))-  ]+sourceFiles = snd runtimeSources++runtimeSources :: (String, [(FilePath, FilePath)])+runtimeSources = $(+  let files = map (\f -> (f, ("src/CabalHelper" </> f))) $ sort $+        [ ("Runtime/Main.hs")+        , ("Runtime/HelperMain.hs")+        , ("Runtime/Compat.hs")+        , ("Shared/Common.hs")+        , ("Shared/InterfaceTypes.hs")+        ]+  in do+    contents <- mapM (\lf -> runIO (LBS.readFile lf)) $ map snd files+    let hashes = map (bytestringDigest . sha256) contents+    let top_hash = showDigest $ sha256 $ LBS.concat hashes++    thfiles <- forM (map fst files `zip` contents) $ \(f, xs) -> do+      return $ TupE [LitE (StringL f), LitE (StringL (LUTF8.toString xs))]+++    return $ TupE [LitE (StringL top_hash), ListE thfiles]++  )++-- - $(LitE . StringL <$> runIO (UTF8.toString <$> BS.readFile

@@ -1,45 +1,35 @@ -- cabal-helper: Simple interface to Cabal's configuration state--- Copyright (C) 2017-2018  Daniel Gröber <cabal-helper@dxld.at>+-- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at> ----- This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- (at your option) any later version.+-- SPDX-License-Identifier: Apache-2.0 ----- This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at ----- You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.--{-# LANGUAGE ScopedTypeVariables #-}+--     http://www.apache.org/licenses/LICENSE-2.0  {-| Module      : CabalHelper.Compiletime.Log-Description : Basic logging facilities-License     : GPL-3+Description : Logging utilities+License     : Apache-2.0 -}  module CabalHelper.Compiletime.Log where -import Control.Monad import Control.Monad.IO.Class-import Control.Exception as E-import Data.String import System.IO-import Prelude+import System.IO.Error  import CabalHelper.Compiletime.Types -vLog :: MonadIO m => Options -> String -> m ()-vLog Options { oVerbose = True } msg =-    liftIO $ hPutStrLn stderr msg-vLog _ _ = return ()--logIOError :: Options -> String -> IO (Maybe a) -> IO (Maybe a)-logIOError opts label a = do-  a `E.catch` \(ex :: IOError) -> do-      vLog opts $ label ++ ": " ++ show ex+logIOError :: Verbose => String -> IO (Maybe a) -> IO (Maybe a)+logIOError label a = do+  a `catchIOError` \ex -> do+      vLog $ label ++ ": " ++ show ex       return Nothing++vLog :: (MonadIO m, Verbose) => String -> m ()+vLog msg+    | ?verbose 0 = liftIO $ hPutStrLn stderr msg+    | otherwise = return ()

@@ -0,0 +1,115 @@+-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-|+Module      : CabalHelper.Compiletime.Process+Description : System process utilities+License     : Apache-2.0+-}++module CabalHelper.Compiletime.Process+    ( module CabalHelper.Compiletime.Process+    , module System.Process+    ) where++import Control.Arrow (second)+import Data.Char+import Data.List+import qualified Data.Map.Strict as Map+import GHC.IO.Exception (IOErrorType(OtherError))+import System.IO+import System.IO.Error+import System.Environment+import System.Exit+import System.Process++import CabalHelper.Compiletime.Types+import CabalHelper.Compiletime.Log++readProcess' :: Verbose => FilePath -> [String] -> String -> IO String+readProcess' exe args inp =+  readProcessStderr Nothing [] exe args inp++readProcessStderr :: Verbose => Maybe FilePath -> [(String, EnvOverride)]+                  -> FilePath -> [String] -> String -> IO String+readProcessStderr mcwd env exe args inp = do+  logProcessCall mcwd env exe args+  env' <- execEnvOverrides env+  outp <- readCreateProcess (proc exe args)+    { cwd = mcwd+    , env = if env == [] then Nothing else Just env'+    } inp+  vLog $ unlines $ map ("=> "++) $ lines outp+  return outp++-- | Essentially 'System.Process.callProcess' but returns exit code, has+-- additional options and logging to stderr when verbosity is enabled.+callProcessStderr'+    :: Verbose => Maybe FilePath -> [(String, EnvOverride)]+    -> FilePath -> [String] -> IO ExitCode+callProcessStderr' mcwd env exe args = do+  logProcessCall mcwd env exe args+  env' <- execEnvOverrides env+  (_, _, _, h) <- createProcess (proc exe args)+    { std_out = UseHandle stderr+    , env = if env == [] then Nothing else Just env'+    , cwd = mcwd+    }+  waitForProcess h++logProcessCall :: Verbose => Maybe FilePath -> [(String, EnvOverride)]+               -> FilePath -> [String] -> IO ()+logProcessCall mcwd env exe args = do+  vLog $ intercalate " " $ cd ++ env_args ++ map formatProcessArg (exe:args)+  where+    env_args = map (\(k,v) -> k ++ "=" ++ show v) env+    cd = case mcwd of+      Nothing -> []; Just cwd -> [ "cd", formatProcessArg cwd++";" ]++execEnvOverride :: EnvOverride -> String -> String+execEnvOverride (EnvPrepend x) y = x ++ y+execEnvOverride (EnvAppend  y) x = x ++ y+execEnvOverride (EnvReplace x) _ = x++execEnvOverrides :: [(String, EnvOverride)] -> IO [(String, String)]+execEnvOverrides overrides = do+  envs <- getEnvironment+  return $ do+    (k,v) <- envs+    case Map.lookup k overrides_map of+      Just os -> return (k, foldr execEnvOverride v os)+      Nothing -> return (k, v)+  where+    overrides_map = Map.fromListWith (++) $ map (second (:[])) overrides++-- | Essentially 'System.Process.callProcess' but with additional options+-- and logging to stderr when verbosity is enabled.+callProcessStderr :: Verbose => Maybe FilePath -> [(String, EnvOverride)]+                  -> FilePath -> [String] -> IO ()+callProcessStderr mwd env exe args = do+  rv <- callProcessStderr' mwd env exe args+  case rv of+    ExitSuccess -> return ()+    ExitFailure v -> processFailedException "callProcessStderr" exe args v++processFailedException :: String -> String -> [String] -> Int -> IO a+processFailedException fn exe args rv =+    ioError $ mkIOError OtherError msg Nothing Nothing+  where+    msg = concat [ fn, ": ", exe, " "+                 , intercalate " " (map formatProcessArg args)+                 , " (exit " ++ show rv ++ ")"+                 ]++formatProcessArg :: String -> String+formatProcessArg xs+    | any isSpace xs = "'"++ xs ++"'"+    | otherwise      = xs

@@ -0,0 +1,369 @@+{-# LANGUAGE DataKinds, MultiWayIf, TupleSections, GADTs, OverloadedStrings #-}++-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-|+Module      : CabalHelper.Compiletime.Program.Cabal+Description : cabal-install program interface+License     : Apache-2.0+-}++module CabalHelper.Compiletime.Program.CabalInstall where++import Control.Arrow ((&&&))+import qualified Cabal.Plan as CP+import Control.Monad+import Data.Coerce+import Data.List.NonEmpty (NonEmpty((:|)))+import Data.Semigroup ((<>))+import Data.Maybe+import Data.Version+import System.IO+import System.IO.Temp+import System.Directory+import System.Environment+import System.FilePath+import Text.Printf+import Text.Read++import Data.Map.Strict (Map)+import qualified Data.Map.Strict as Map+import qualified Data.Set as Set+import qualified Data.Text as Text++import qualified CabalHelper.Compiletime.Cabal as Cabal+import CabalHelper.Compiletime.Types+import CabalHelper.Compiletime.Program.GHC+  ( GhcVersion(..), createPkgDb )+import CabalHelper.Compiletime.Cabal+  ( CabalSourceDir(..), UnpackedCabalVersion, CabalVersion'(..), unpackCabalV1 )+import CabalHelper.Compiletime.Process+import CabalHelper.Shared.InterfaceTypes+  ( ChComponentName(..), ChLibraryName(..) )+import CabalHelper.Shared.Common+  ( parseVer, trim, appCacheDir, panicIO )++newtype CabalInstallVersion = CabalInstallVersion { cabalInstallVer :: Version }++data HEAD = HEAD deriving (Eq, Show)++cabalInstallVersion :: (Verbose, Progs) => IO CabalInstallVersion+cabalInstallVersion = do+  CabalInstallVersion . parseVer . trim+    <$> readProcess' (cabalProgram ?progs) ["--numeric-version"] ""++installCabalLibV1 :: Env => GhcVersion -> UnpackedCabalVersion -> IO PackageDbDir+installCabalLibV1 ghcVer cabalVer = do+  withSystemTempDirectory "cabal-helper.install-cabal-tmp" $ \tmpdir -> do+    installingMessage cabalVer+    srcdir <- unpackCabalV1 cabalVer tmpdir++    db <- createPkgDb cabalVer++    callCabalInstall db srcdir ghcVer cabalVer++    return db++installingMessage :: CabalVersion' a -> IO ()+installingMessage = message+  where+    message (CabalHEAD {}) = return () -- only used for tests+    message (CabalVersion ver) = do+      appdir <- appCacheDir+      let sver = showVersion ver+      -- TODO: dumping this to stderr is not really acceptable, we need to have+      -- a way to let API clients override this!+      hPutStr stderr $ printf "\+\cabal-helper: Installing a private copy of Cabal because we couldn't\n\+\find the right version anywhere on your system. You can set the environment\n\+\variable CABAL_HELPER_DEBUG=1 to see where we searched.\n\+\\n\+\Note that this installation might take a little while but it will only\n\+\happen once per Cabal library version used in your build-plans.\n\+\\n\+\If you want to avoid this automatic installation altogether install\n\+\version %s of the Cabal library manually, either using cabal or your\n\+\system package manager. With cabal you can use the following command:\n\+\    $ cabal install Cabal --constraint \"Cabal == %s\"\n\+\\n\+\FYI the build products and cabal-helper executable cache are all in the\n\+\following directory, you can simply delete it if you think something\n\+\is broken :\n\+\    %s\n\+\Please do report any problems you encounter.\n\+\\n\+\Installing Cabal %s ...\n" sver sver appdir sver++callCabalInstall+    :: Env+    => PackageDbDir+    -> CabalSourceDir+    -> GhcVersion+    -> UnpackedCabalVersion+    -> IO ()+callCabalInstall+  (PackageDbDir db)+  (CabalSourceDir srcdir)+  ghcVer+  unpackedCabalVer+  = do+  civ@CabalInstallVersion {..} <- cabalInstallVersion+  cabal_opts <- return $ concat+      [+        [ "--package-db=clear"+        , "--package-db=global"+        , "--package-db=" ++ db+        , "--prefix=" ++ db </> "prefix"+        ]+        , cabalWithGHCProgOpts+        , if cabalInstallVer >= Version [1,20,0,0] []+             then ["--no-require-sandbox"]+             else []+        , [ "install", srcdir ]+        , if | ?verbose 3 -> ["-v2"]+             | ?verbose 4 -> ["-v3"]+             | otherwise -> []+        , [ "--only-dependencies" ]+      ]++  callProcessStderr (Just "/") [] (cabalProgram ?progs) cabal_opts++  runSetupHs ghcVer db srcdir unpackedCabalVer civ++  hPutStrLn stderr "done"++runSetupHs+    :: Env+    => GhcVersion+    -> FilePath+    -> FilePath+    -> UnpackedCabalVersion+    -> CabalInstallVersion+    -> IO ()+runSetupHs ghcVer db srcdir cabalVer CabalInstallVersion {..}+    | cabalInstallVer >= parseVer "1.24" = do+      go $ \args -> callProcessStderr (Just srcdir) [] (cabalProgram ?progs) $+        [ "act-as-setup", "--" ] ++ args+    | otherwise = do+      SetupProgram {..} <- compileSetupHs ghcVer db srcdir+      go $ callProcessStderr (Just srcdir) [] setupProgram+  where+    parmake_opt :: Maybe Int -> [String]+    parmake_opt nproc'+        | CabalHEAD _ <- cabalVer =+            ["-j"++nproc]+        | CabalVersion ver <- cabalVer, ver >= Version [1,20] [] =+            ["-j"++nproc]+        | otherwise =+            []+      where+        nproc = fromMaybe "" $ show <$> nproc'+    go :: ([String] -> IO ()) -> IO ()+    go run = do+      run $ [ "configure", "--package-db", db, "--prefix", db </> "prefix" ]+              ++ cabalWithGHCProgOpts+      mnproc <- join . fmap readMaybe <$> lookupEnv "NPROC"+      run $ [ "build" ] ++ parmake_opt mnproc+      run [ "copy" ]+      run [ "register" ]++newtype SetupProgram = SetupProgram { setupProgram :: FilePath }+compileSetupHs :: Env => GhcVersion -> FilePath -> FilePath -> IO SetupProgram+compileSetupHs (GhcVersion ghcVer) db srcdir = do+  let no_version_macros+        | ghcVer >= Version [8] [] = [ "-fno-version-macros" ]+        | otherwise                = []++      file = srcdir </> "Setup"++  callProcessStderr (Just srcdir) [] (ghcProgram ?progs) $ concat+    [ [ "--make"+      , "-package-conf", db+      ]+    , no_version_macros+    , [ file <.> "hs"+      , "-o", file+      ]+    ]+  return $ SetupProgram file++cabalWithGHCProgOpts :: Progs => [String]+cabalWithGHCProgOpts = concat+  [ [ "--with-ghc=" ++ ghcProgram ?progs ]+  -- Only pass ghc-pkg if it was actually set otherwise we+  -- might break cabal's guessing logic+  , if ghcPkgProgram ?progs /= ghcPkgProgram defaultPrograms+      then [ "--with-ghc-pkg=" ++ ghcPkgProgram ?progs ]+      else []+  ]++installCabalLibV2 :: Env => GhcVersion -> UnpackedCabalVersion -> PackageEnvFile -> IO ()+installCabalLibV2 _ghcVer cv (PackageEnvFile env_file) = do+  exists <- doesFileExist env_file+  if exists+    then return ()+    else do+    installingMessage cv+    (target, cwd) <- case cv of+      CabalVersion cabalVer -> do+        tmp <- getTemporaryDirectory+        return $ ("Cabal-"++showVersion cabalVer, tmp)+      CabalHEAD (_commitid, CabalSourceDir srcdir) -> do+        return (".", srcdir)+    CabalInstallVersion {..} <- cabalInstallVersion+    cabal_opts <- return $ concat+        [ if cabalInstallVer >= Version [1,20] []+             then ["--no-require-sandbox"]+             else []+        , [ if cabalInstallVer >= Version [2,4] []+              then "v2-install"+              else "new-install"+          ]+        , cabalV2WithGHCProgOpts+        , [ "--package-env=" ++ env_file+          , "--lib"+          , target+          ]+        , if | ?verbose 3 -> ["-v2"]+             | ?verbose 4 -> ["-v3"]+             | otherwise -> []+        ]+    callProcessStderr (Just cwd) [] (cabalProgram ?progs) cabal_opts+    hPutStrLn stderr "done"+++cabalV2WithGHCProgOpts :: Progs => [String]+cabalV2WithGHCProgOpts = concat+  [ [ "--with-compiler=" ++ ghcProgram ?progs ]+  , if ghcPkgProgram ?progs /= ghcPkgProgram defaultPrograms+      then [ "--with-hc-pkg=" ++ ghcPkgProgram ?progs ]+      else []+  ]++planPackages :: CP.PlanJson -> IO [Package ('Cabal 'CV2)]+planPackages plan = do+    fmap Map.elems $+      mapM mkPackage $+      groupByMap $ Map.elems $+      Map.filter ((==CP.UnitTypeLocal) . CP.uType) $+      CP.pjUnits plan+  where+    groupByMap = Map.fromListWith (<>) . map (CP.uPId &&& (:|[]))++    mkPackage :: NonEmpty CP.Unit -> IO (Package ('Cabal 'CV2))+    mkPackage units@(unit :| _) =+      case unit of+       CP.Unit+        { uPkgSrc=Just (CP.LocalUnpackedPackage pkgdir)+        } -> do+          cabal_file <- Cabal.complainIfNoCabalFile pkgdir =<< Cabal.findCabalFile pkgdir+          let pkg = Package+                { pPackageName =+                    let CP.PkgId (CP.PkgName pkg_name) _ = CP.uPId unit+                    in Text.unpack pkg_name+                , pSourceDir = pkgdir+                , pCabalFile = CabalFile cabal_file+                , pFlags = []+                , pUnits = fmap (\u -> fixBackpackUnit u $ mkUnit pkg { pUnits = () } u) units+                }+          return pkg+       _ -> panicIO "planPackages.mkPackage: Got non-unpacked package src!"++    takeBackpackIndefUnitId :: CP.Unit -> Maybe CP.UnitId+    takeBackpackIndefUnitId CP.Unit {uId=CP.UnitId uid}+      | Text.any (=='+') uid = Just $ CP.UnitId $ Text.takeWhile (/='+') uid+      | otherwise = Nothing++    findUnitsDependingOn :: CP.UnitId -> [CP.Unit]+    findUnitsDependingOn uid = Map.elems $+      Map.filter (any (Set.member uid . CP.ciLibDeps) . Map.elems . CP.uComps) $+      CP.pjUnits plan++    -- Horrible workaround for https://github.com/haskell/cabal/issues/6201+    fixBackpackUnit plan_unit ch_unit+      | Just indef_uid <- takeBackpackIndefUnitId plan_unit = do+        let deps = findUnitsDependingOn indef_uid+        ch_unit { uImpl = (uImpl ch_unit)+          { uiV2Components = concatMap unitTargets deps+          , uiV2OnlyDependencies = True+          } }+      | otherwise =+        ch_unit++    unitTargets :: CP.Unit -> [String]+    unitTargets CP.Unit {uComps, uPId=CP.PkgId pkg_name _} =+      map (Text.unpack . (((coerce pkg_name) <> ":") <>) . CP.dispCompNameTarget pkg_name) $+      Map.keys uComps++    mkUnit :: Package' () -> CP.Unit -> Unit ('Cabal 'CV2)+    mkUnit pkg u@CP.Unit+      { uDistDir=Just distdirv1+      , uComps=comps+      , uPId=CP.PkgId pkg_name _+      , uId+      } =+        Unit+          { uUnitId     = UnitId $ Text.unpack (coerce uId)+          , uPackage    = pkg+          , uDistDir    = DistDirLib distdirv1+          , uImpl       =+            let+              comp_names = Map.keys comps+              uiV2ComponentNames = map cpCompNameToChComponentName comp_names+              uiV2Components = unitTargets u+              uiV2OnlyDependencies = False+            in UnitImplV2 {..}+          }+    mkUnit _ _ =+      error "planPackages.mkUnit: Got package without distdir!"++cpCompNameToChComponentName :: CP.CompName -> ChComponentName+cpCompNameToChComponentName cn =+    case cn of+      CP.CompNameSetup         -> ChSetupHsName+      CP.CompNameLib           -> ChLibName     ChMainLibName+      (CP.CompNameSubLib name) -> ChLibName   $ ChSubLibName $ Text.unpack name+      (CP.CompNameFLib name)   -> ChFLibName  $ Text.unpack name+      (CP.CompNameExe name)    -> ChExeName   $ Text.unpack name+      (CP.CompNameTest name)   -> ChTestName  $ Text.unpack name+      (CP.CompNameBench name)  -> ChBenchName $ Text.unpack name++data CabalInstallCommand+    = CIConfigure+    | CIBuild++doCabalInstallCmd+    :: (QueryEnvI c ('Cabal cpt) -> CallProcessWithCwdAndEnv a)+    -> QueryEnvI c ('Cabal cpt)+    -> Maybe FilePath -> CabalInstallCommand -> [String] -> IO a+doCabalInstallCmd procfn qe mcwd cmd args = do+  case (cmd, projTypeOfQueryEnv qe) of+    (CIConfigure, SCabal SCV1) ->+      run "v1-configure" cabalProjArgs cabalUnitArgs []+    (CIBuild, SCabal SCV1) ->+      run "v1-build" cabalProjArgs [] []+    (_, SCabal SCV2) ->+      run "v2-build" cabalProjArgs cabalUnitArgs []+  where+    Programs{..} = qePrograms qe+    run cmdarg before aftercmd after  = procfn qe mcwd [] cabalProgram $+      before ++ [cmdarg] ++ aftercmd ++ args ++ after++readCabalInstallCmd+    :: QueryEnvI c ('Cabal cpt)+    -> Maybe FilePath -> CabalInstallCommand -> [String] -> IO String+callCabalInstallCmd+    :: QueryEnvI c ('Cabal cpt)+    -> Maybe FilePath -> CabalInstallCommand -> [String] -> IO ()++readCabalInstallCmd = doCabalInstallCmd (\qe -> qeReadProcess qe "")+callCabalInstallCmd = doCabalInstallCmd qeCallProcess

@@ -0,0 +1,155 @@+-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-|+Module      : CabalHelper.Compiletime.Program.GHC+Description : GHC program interface+License     : Apache-2.0+-}++module CabalHelper.Compiletime.Program.GHC where++import Control.Monad+import Control.Monad.Trans.Maybe+import Control.Monad.IO.Class+import Data.Char+import Data.List+import Data.Maybe+import Data.Version+import System.Exit+import System.FilePath+import System.Directory++import CabalHelper.Shared.Common+  (parseVer, trim, appCacheDir, parsePkgId)+import CabalHelper.Compiletime.Types+import CabalHelper.Compiletime.Cabal+  ( ResolvedCabalVersion, showResolvedCabalVersion, UnpackedCabalVersion+  , unpackedToResolvedCabalVersion, CabalVersion'(..) )+import CabalHelper.Compiletime.Process+import CabalHelper.Compiletime.Log++data GhcPackageSource+    = GPSAmbient+    | GPSPackageDBs ![PackageDbDir]+    | GPSPackageEnv !PackageEnvFile++data GhcInvocation = GhcInvocation+    { giOutDir          :: !FilePath+    , giOutput          :: !FilePath+    , giCPPOptions      :: ![String]+    , giPackageSource   :: !GhcPackageSource+    , giIncludeDirs     :: ![FilePath]+    , giHideAllPackages :: !Bool+    , giPackages        :: ![String]+    , giWarningFlags    :: ![String]+    , giInputs          :: ![String]+    }++newtype GhcVersion = GhcVersion { unGhcVersion :: Version }+    deriving (Eq, Ord, Read, Show)++showGhcVersion :: GhcVersion -> String+showGhcVersion (GhcVersion v) = showVersion v++ghcVersion :: (Verbose, Progs) => IO GhcVersion+ghcVersion = GhcVersion .+  parseVer . trim <$> readProcess' (ghcProgram ?progs) ["--numeric-version"] ""++ghcPkgVersion :: (Verbose, Progs) => IO Version+ghcPkgVersion =+  parseVer . trim . dropWhile (not . isDigit)+    <$> readProcess' (ghcPkgProgram ?progs) ["--version"] ""++createPkgDb :: (Verbose, Progs) => UnpackedCabalVersion -> IO PackageDbDir+createPkgDb cabalVer = do+  db@(PackageDbDir db_path)+    <- getPrivateCabalPkgDb $ unpackedToResolvedCabalVersion cabalVer+  exists <- doesDirectoryExist db_path+  when (not exists) $+       callProcessStderr Nothing [] (ghcPkgProgram ?progs) ["init", db_path]+  return db++getPrivateCabalPkgDb :: (Verbose, Progs) => ResolvedCabalVersion -> IO PackageDbDir+getPrivateCabalPkgDb cabalVer = do+  appdir <- appCacheDir+  ghcVer <- ghcVersion+  let db_path =+        appdir </> "ghc-" ++ showGhcVersion ghcVer ++ ".package-dbs"+               </> "Cabal-" ++ showResolvedCabalVersion cabalVer+  return $ PackageDbDir db_path++getPrivateCabalPkgEnv+    :: Verbose => GhcVersion -> ResolvedCabalVersion -> IO PackageEnvFile+getPrivateCabalPkgEnv ghcVer cabalVer = do+  appdir <- appCacheDir+  let env_path =+        appdir </> "ghc-" ++ showGhcVersion ghcVer ++ ".package-envs"+               </> "Cabal-" ++ showResolvedCabalVersion cabalVer ++ ".package-env"+  return $ PackageEnvFile env_path++listCabalVersions+    :: (Verbose, Progs) => Maybe PackageDbDir -> MaybeT IO [Version]+listCabalVersions mdb = do+  let mdb_path = unPackageDbDir <$> mdb+  exists <- fromMaybe True <$>+    traverse (liftIO . doesDirectoryExist) mdb_path+  case exists of+    True -> MaybeT $ logIOError "listCabalVersions" $ Just <$> do+      let mdbopt = ("--package-conf="++) <$> mdb_path+          args = ["list", "--simple-output", "Cabal"] ++ maybeToList mdbopt+      catMaybes . map (fmap snd . parsePkgId) . words+               <$> readProcess' (ghcPkgProgram ?progs) args ""+    _ -> mzero++cabalVersionExistsInPkgDb+    :: (Verbose, Progs) => CabalVersion' a -> PackageDbDir -> IO Bool+cabalVersionExistsInPkgDb cabalVer db@(PackageDbDir db_path) = do+  fromMaybe False <$> runMaybeT (do+    vers <- listCabalVersions (Just db)+    return $+      case (cabalVer, vers) of+        (CabalVersion ver, _) -> ver `elem` vers+        (CabalHEAD _, []) -> False+        (CabalHEAD _, [_headver]) -> True+        (CabalHEAD _, _) ->+          error $ msg ++ db_path)+  where+    msg = "\+\Multiple Cabal versions in a HEAD package-db!\n\+\This shouldn't happen. However you can manually delete the following\n\+\directory to resolve this:\n    "++invokeGhc :: Env => GhcInvocation -> IO (Either ExitCode FilePath)+invokeGhc GhcInvocation {..} = do+    rv <- callProcessStderr' (Just "/") [] (ghcProgram ?progs) $ concat+      [ [ "-outputdir", giOutDir+        , "-o", giOutput+        ]+      , map ("-optP"++) giCPPOptions+      , if giHideAllPackages then ["-hide-all-packages"] else []+      , let packageFlags = concatMap (\p -> ["-package", p]) giPackages in+        case giPackageSource of+          GPSAmbient -> packageFlags+          GPSPackageDBs dbs -> concat+            [ map ("-package-conf="++) $ unPackageDbDir <$> dbs+            , packageFlags+            ]+          GPSPackageEnv env -> [ "-package-env=" ++ unPackageEnvFile env ]+      , map ("-i"++) $ nub $ "" : giIncludeDirs+      , giWarningFlags+      , ["--make"]+      , giInputs+      ]+    return $+      case rv of+        ExitSuccess -> Right giOutput+        e@(ExitFailure _) -> Left e

@@ -0,0 +1,141 @@+-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-|+Module      : CabalHelper.Compiletime.Program.Stack+Description : Stack program interface+License     : Apache-2.0+-}++{-# LANGUAGE GADTs, DataKinds #-}++module CabalHelper.Compiletime.Program.Stack where++import Control.Exception (handle, throwIO)+import Control.Monad+import Control.Monad.Trans.Maybe+import Control.Monad.IO.Class+import Data.Char+import Data.List hiding (filter)+import Data.List.NonEmpty (NonEmpty(..))+import Data.String+import Data.Maybe+import Data.Function+import Data.Version+import System.Directory (findExecutable)+import System.FilePath hiding ((<.>))+import System.IO (hPutStrLn, stderr)+import Text.Printf (printf)+import Prelude++import CabalHelper.Compiletime.Types+import CabalHelper.Compiletime.Types.RelativePath+import CabalHelper.Shared.Common++getPackage :: QueryEnvI c 'Stack -> CabalFile -> IO (Package 'Stack)+getPackage qe cabal_file@(CabalFile cabal_file_path) = do+  let pkgdir = takeDirectory cabal_file_path+  -- this is kind of a hack but works even for unicode package names and+  -- besides stack even enforces this naming convention unlike cabal. This+  -- is the error you get if the names don't match:+  --+  -- cabal file path foo-bla.cabal does not match the package name it defines.+  -- Please rename the file to: foo.cabal+  -- For more information, see:+  --  https://github.com/commercialhaskell/stack/issues/317+  let pkg_name = dropExtension $ takeFileName cabal_file_path+  look <- paths qe pkgdir+  let distdirv1_rel = look "dist-dir:"+  let pkg = Package+        { pPackageName = pkg_name+        , pSourceDir = pkgdir+        , pCabalFile = cabal_file+        , pFlags = []+        , pUnits = (:|[]) $ Unit+          { uUnitId     = UnitId pkg_name+          , uDistDir    = DistDirLib $ pkgdir </> distdirv1_rel+          , uPackage    = pkg { pUnits = () }+          , uImpl       = UnitImplStack+          }+        }+  return pkg++projPaths :: QueryEnvI c 'Stack -> IO StackProjPaths+projPaths qe@QueryEnv {qeProjLoc} = do+  look <- paths qe $ plStackProjectDir qeProjLoc+  return StackProjPaths+    { sppGlobalPkgDb = PackageDbDir $ look "global-pkg-db:"+    , sppSnapPkgDb   = PackageDbDir $ look "snapshot-pkg-db:"+    , sppLocalPkgDb  = PackageDbDir $ look "local-pkg-db:"+    , sppCompExe     = look "compiler-exe:"+    }++paths :: QueryEnvI c 'Stack -> FilePath -> IO (String -> FilePath)+paths qe@QueryEnv{qeProjLoc=ProjLocStackYaml stack_yaml} cwd+  = do+  out <- readStackCmd qe (Just cwd) $+    workdirArg qe ++ [ "path", "--stack-yaml="++stack_yaml ]+  return $ \k -> let Just x = lookup k $ map split $ lines out in x+  where+    split l = let (key, ' ' : val) = span (not . isSpace) l in (key, val)++listPackageCabalFiles :: QueryEnvI c 'Stack -> IO [CabalFile]+listPackageCabalFiles qe@QueryEnv{qeProjLoc}+  = handle ioerror $ do+  let projdir = plStackProjectDir qeProjLoc+  out <- readStackCmd qe (Just projdir)+    [ "ide", "packages", "--cabal-files", "--stdout" ]+  return $ map CabalFile $ lines out+  where+    ioerror :: IOError -> IO a+    ioerror ioe = (fromMaybe (throwIO ioe) =<<) $ runMaybeT $ do+      stack_exe <- MaybeT $ findExecutable $ stackProgram $ qePrograms qe+      stack_ver_str+        <- liftIO $ trim <$> readStackCmd qe Nothing ["--numeric-version"]+      stack_ver <- MaybeT $ return $ parseVerMay stack_ver_str+      guard $ stack_ver < makeVersion [1,9,4]++      let prog_cfg = show $ qePrograms qe++      liftIO $ hPutStrLn stderr $ printf+        "\nerror: stack version too old!\+        \\n\n\+        \You have '%s' installed but cabal-helper needs at least\n\+        \stack version 1.9.4+.\n\+        \\n\+        \FYI cabal-helper is using the following `stack` executable:\n\+        \  %s\n\+        \\n\+        \Additional debugging info: QueryEnv qePrograms =\n\+        \  %s\n" stack_ver_str stack_exe prog_cfg+      mzero++workdirArg :: QueryEnvI c 'Stack -> [String]+workdirArg QueryEnv{qeDistDir=DistDirStack mworkdir} =+  maybeToList $ ("--work-dir="++) . unRelativePath <$> mworkdir++doStackCmd :: (QueryEnvI c 'Stack -> CallProcessWithCwdAndEnv a)+           -> QueryEnvI c 'Stack+           -> Maybe FilePath -> [String] -> IO a+doStackCmd procfn qe mcwd args =+  let Programs{..} = qePrograms qe in+  procfn qe mcwd stackEnv stackProgram $+    stackProjArgs ++ args ++ stackUnitArgs++readStackCmd :: QueryEnvI c 'Stack -> Maybe FilePath -> [String] -> IO String+callStackCmd :: QueryEnvI c 'Stack -> Maybe FilePath -> [String] -> IO ()++readStackCmd = doStackCmd (\qe -> qeReadProcess qe "")+callStackCmd = doStackCmd qeCallProcess++patchCompPrograms :: StackProjPaths -> Programs -> Programs+patchCompPrograms StackProjPaths{sppCompExe} progs =+  progs { ghcProgram = sppCompExe }

@@ -0,0 +1,70 @@+-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2015-2017  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-|+Module      : CabalHelper.Shared.Sandbox+Description : Extracting information from @cabal.sandbox.config@ files+License     : Apache-2.0+-}++module CabalHelper.Compiletime.Sandbox where++import Control.Applicative+import Data.Char+import Data.Maybe+import Data.List+import System.FilePath+import Prelude++import qualified Data.Traversable as T++import CabalHelper.Shared.Common+import CabalHelper.Compiletime.Program.GHC+    ( GhcVersion (..), showGhcVersion )++-- | Get the path to the sandbox package-db in a project+getSandboxPkgDb :: String+             -- ^ Cabal build platform, i.e. @buildPlatform@+             -> GhcVersion+             -- ^ GHC version (@cProjectVersion@ is your friend)+             -> FilePath+             -- ^ Path to the cabal package root directory (containing the+             -- @cabal.sandbox.config@ file)+             -> IO (Maybe FilePath)+getSandboxPkgDb platform ghcVer projdir = do+  mConf <-+      T.traverse readFile =<< mightExist (projdir </> "cabal.sandbox.config")+  return $ fixPkgDbVer <$> (extractSandboxDbDir =<< mConf)++ where+   fixPkgDbVer dir =+       case takeFileName dir == ghcSandboxPkgDbDir platform ghcVer of+         True -> dir+         False -> takeDirectory dir </> ghcSandboxPkgDbDir platform ghcVer++ghcSandboxPkgDbDir :: String -> GhcVersion -> String+ghcSandboxPkgDbDir platform ghcVer =+   platform ++ "-ghc-" ++ showGhcVersion ghcVer ++ "-packages.conf.d"++-- | Extract the sandbox package db directory from the cabal.sandbox.config+-- file. Exception is thrown if the sandbox config file is broken.+extractSandboxDbDir :: String -> Maybe FilePath+extractSandboxDbDir conf = extractValue <$> parse conf+  where+    key = "package-db:"+    keyLen = length key++    parse = listToMaybe . filter (key `isPrefixOf`) . lines+    extractValue = CabalHelper.Compiletime.Sandbox.dropWhileEnd isSpace . dropWhile isSpace . drop keyLen++-- dropWhileEnd is not provided prior to base 4.5.0.0.+dropWhileEnd :: (a -> Bool) -> [a] -> [a]+dropWhileEnd p = foldr (\x xs -> if p x && null xs then [] else x : xs) []

@@ -1,42 +1,595 @@ -- cabal-helper: Simple interface to Cabal's configuration state -- Copyright (C) 2015-2018  Daniel Gröber <cabal-helper@dxld.at> ----- This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- (at your option) any later version.+-- SPDX-License-Identifier: Apache-2.0 ----- This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at ----- You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.+--     http://www.apache.org/licenses/LICENSE-2.0 -{-# LANGUAGE DeriveGeneric, DeriveDataTypeable, DefaultSignatures #-}+{-# LANGUAGE DeriveGeneric, DeriveDataTypeable, DefaultSignatures,+  StandaloneDeriving, GADTs, DataKinds, KindSignatures, RankNTypes, PolyKinds #-}  {-| Module      : CabalHelper.Compiletime.Types Description : Types used throughout-License     : GPL-3+License     : Apache-2.0 -}  module CabalHelper.Compiletime.Types where +import Cabal.Plan+  ( PlanJson )+import Data.ByteString (ByteString)+import Data.IORef import Data.Version+import Data.Typeable+import GHC.Generics+import System.FilePath (takeDirectory)+import System.Posix.Types+import CabalHelper.Compiletime.Types.RelativePath+import CabalHelper.Shared.InterfaceTypes -data Options = Options {-          oHelp          :: Bool-        , oVerbose       :: Bool-        , oGhcProgram    :: FilePath-        , oGhcPkgProgram :: FilePath-        , oCabalProgram  :: FilePath-        , oCabalVersion  :: Maybe Version-        , oCabalPkgDb    :: Maybe PackageDbDir-}+import Data.List.NonEmpty (NonEmpty)+--import qualified Data.List.NonEmpty as NonEmpty+import Data.Map.Strict (Map)+--import qualified Data.Map.Strict as Strict -newtype PackageDbDir = PackageDbDir { unPackageDbDir :: FilePath }+-- | The kind of project being managed by a 'QueryEnv' (pun intended). Used+-- as a phantom-type variable throughout to make the project type being+-- passed into various functions correspond to the correct implementation.+data ProjType+    = Cabal CabalProjType -- ^ @cabal@ project.+    | Stack -- ^ @stack@ project.+      deriving (Eq, Ord, Show, Read) -defaultOptions :: Options-defaultOptions = Options False False "ghc" "ghc-pkg" "cabal" Nothing Nothing+-- | The kind of a @cabal@ project.+data CabalProjType+    = CV1 -- ^ @cabal v1-build@ project.+    | CV2 -- ^ @cabal v2-build@ project.+      deriving (Eq, Ord, Show, Read)++-- | A "singleton" datatype for 'ProjType' which allows us to establish a+-- correspondence between a runtime representation of 'ProjType' to the+-- compile-time value at the type level.+--+-- If you just want to know the runtime 'ProjType' use 'demoteSProjType' to+-- convert to that.+data SProjType pt where+    SCabal :: !(SCabalProjType pt) -> SProjType ('Cabal pt)+    SStack :: SProjType 'Stack++deriving instance Show (SProjType pt)++-- | This is a singleton, like 'SProjType', but restricted to just the+-- Cabal project types. We use this to restrict some functions which don't+-- make sense for Stack to just the Cabal project types.+data SCabalProjType pt where+    SCV1 :: SCabalProjType 'CV1+    SCV2 :: SCabalProjType 'CV2++deriving instance Show (SCabalProjType pt)++demoteSProjType :: SProjType pt -> ProjType+demoteSProjType (SCabal SCV1) = Cabal CV1+demoteSProjType (SCabal SCV2) = Cabal CV2+demoteSProjType SStack = Stack++-- | Location of a project context. This is usually just the path project's+-- top-level source code directory together with an optional project-type+-- specific config file path.+--+-- To find any recognized default project contexts in a given directory+-- use 'Distribution.Helper.Discover.findProjects'.+--+-- Build tools usually allow the user to specify the location of their+-- project config files manually, so we also support passing this path here+-- with the @*File@ constructors.+--+-- === Correspondence between Project and Package Source Directories+--+-- Note that the project's source directory does not necessarily correspond+-- to the directory containing the project config file, though in some+-- cases it does.+--+-- For example @cabal v2-build@ allows the @cabal.project@ file to be+-- positively anywhere in the filesystem when specified via the+-- @--cabal-project@ command-line flag, corresponding to the+-- 'ProjLocV2File' constructor here. This config file can then refer to+-- package directories with absolute paths in the @packages:@ declaration.+--+-- Hence it isn't actually possible to find /one/ directory which contains+-- the whole project's source code but rather we have to consider each+-- package's source directory individually, see 'Package.pSourceDir'+data ProjLoc (pt :: ProjType) where+    -- | A fully specified @cabal v1-build@ project context. Here you can+    -- specify both the path to the @.cabal@ file and the source directory+    -- of the package. The cabal file path corresponds to the+    -- @--cabal-file=PATH@ flag on the @cabal@ command line.+    --+    -- Note that more than one such files existing in a package directory+    -- is a user error and while cabal will still complain about that we+    -- won't.+    --+    -- Also note that for this project type the concepts of project and+    -- package coincide.+    ProjLocV1CabalFile :: { plCabalFile :: !FilePath, plProjectDirV1 :: !FilePath } -> ProjLoc ('Cabal 'CV1)++    -- | A @cabal v1-build@ project context. Essentially the same as+    -- 'ProjLocV1CabalFile' but this will dynamically search for the cabal+    -- file for you as cabal-install does by default.+    --+    -- If more than one @.cabal@ file is found in the given directory we+    -- will shamelessly throw a obscure exception so prefer+    -- 'ProjLocV1CabalFile' if you don't want that to happen. This mainly+    -- exists for easy upgrading from the @cabal-helper-0.8@ series.+    ProjLocV1Dir :: { plProjectDirV1 :: !FilePath } -> ProjLoc ('Cabal 'CV1)++    -- | A @cabal v2-build@ project context. The path to the+    -- @cabal.project@ file, though you can call it whatever you like. This+    -- configuration file then points to the packages that make up this+    -- project. This corresponds to the @--cabal-project=PATH@ flag on the+    -- @cabal@ command line.+    ProjLocV2File    :: { plCabalProjectFile :: !FilePath, plProjectDirV2 :: !FilePath } -> ProjLoc ('Cabal 'CV2)++    -- | This is equivalent to 'ProjLocV2File' but using the default+    -- @cabal.project@ file name in the given directory.+    ProjLocV2Dir     :: { plProjectDirV2 :: !FilePath } -> ProjLoc ('Cabal 'CV2)++    -- | A @stack@ project context. Specify the path to the @stack.yaml@+    -- file here. This configuration file then points to the packages that+    -- make up this project. Corresponds to @stack@'s @--stack-yaml=PATH@+    -- command line flag if different from the default name, @stack.yaml@.+    --+    -- Note: with Stack the invariant @takeDirectory plStackYaml == projdir@ holds.+    ProjLocStackYaml :: { plStackYaml :: !FilePath } -> ProjLoc 'Stack++deriving instance Show (ProjLoc pt)++plV1Dir :: ProjLoc ('Cabal 'CV1) -> FilePath+plV1Dir ProjLocV1CabalFile {plProjectDirV1} = plProjectDirV1+plV1Dir ProjLocV1Dir {plProjectDirV1} = plProjectDirV1++plCabalProjectDir :: ProjLoc ('Cabal cpt) -> FilePath+plCabalProjectDir ProjLocV1CabalFile {plProjectDirV1} = plProjectDirV1+plCabalProjectDir ProjLocV1Dir  {plProjectDirV1} = plProjectDirV1+plCabalProjectDir ProjLocV2File {plProjectDirV2} = plProjectDirV2+plCabalProjectDir ProjLocV2Dir  {plProjectDirV2} = plProjectDirV2++plStackProjectDir :: ProjLoc 'Stack -> FilePath+plStackProjectDir ProjLocStackYaml {plStackYaml} = takeDirectory plStackYaml++projTypeOfProjLoc :: ProjLoc pt -> SProjType pt+projTypeOfProjLoc ProjLocV1CabalFile{} = SCabal SCV1+projTypeOfProjLoc ProjLocV1Dir{}       = SCabal SCV1+projTypeOfProjLoc ProjLocV2File{}      = SCabal SCV2+projTypeOfProjLoc ProjLocV2Dir{}       = SCabal SCV2+projTypeOfProjLoc ProjLocStackYaml{}   = SStack++-- | A build directory for a certain project type. The @pt@ type variable+-- must be compatible with the 'ProjLoc' used. This is enforced by the type+-- system so you can't get this wrong.+data DistDir (pt :: ProjType) where+    -- | A build-directory for cabal, aka. dist-dir in Cabal+    -- terminology. 'SCabalProjType' specifies whether we should use+    -- /v2-build/ or /v1-build/. This choice must correspond to+    -- 'ProjLoc' \'s project type.+    DistDirCabal :: !(SCabalProjType pt) -> !FilePath -> DistDir ('Cabal pt)++    -- | A build-directory for stack, aka. /work-dir/. Optionally override+    -- Stack's /work-dir/. If you just want to use Stack's default set to+    -- @Nothing@+    DistDirStack :: !(Maybe RelativePath) -> DistDir 'Stack++deriving instance Show (DistDir pt)++projTypeOfDistDir :: DistDir pt -> SProjType pt+projTypeOfDistDir (DistDirCabal pt _) = SCabal pt+projTypeOfDistDir DistDirStack{} = SStack++-- | General purpose existential wrapper. Useful for hiding a phantom type+-- argument.+--+-- Say you have:+--+-- @+-- {-\# LANGUAGE DataKinds, GADTS \#-}+-- data K = A | B | ...+-- data Q k where+--   QA :: ... -> Q 'A+--   QB :: ... -> Q 'B+-- @+--+-- and you want a list of @Q@. You can use @Ex@ to hide the phantom type+-- argument and recover it later by matching on the GADT constructors:+--+-- @+-- qa :: Q A+-- qa = QA+--+-- qb :: Q B+-- qb = QB+--+-- mylist :: [Ex Q]+-- mylist = [Ex qa, Ex qb]+-- @+data Ex a = forall x. Ex (a x)++-- | Environment for running a 'Query'. The constructor is not exposed in the+-- API to allow extending it with more fields without breaking user code.+--+-- To create a 'QueryEnv' use the 'mkQueryEnv' smart constructor instead. Some+-- field accessors are exported and may be used to override the defaults filled+-- in by 'mkQueryEnv'. See below.+--+-- Note that this environment contains an 'IORef' used as a cache. If you want+-- to take advantage of this you should not simply discard the value returned by+-- the smart constructor after one use.+type QueryEnv pt = QueryEnvI QueryCache pt++data QueryEnvI c (pt :: ProjType) = QueryEnv+    { qeReadProcess :: !ReadProcessWithCwdAndEnv+    -- ^ Field accessor for 'QueryEnv'. Function used to to start processes+    -- and capture output. Useful if you need to, for example, redirect+    -- standard error output of programs started by cabal-helper.++    , qeCallProcess :: !(CallProcessWithCwdAndEnv ())+    -- ^ Field accessor for 'QueryEnv'. Function used to to start processes+    -- without capturing output. See also 'qeReadProcess'.++    , qePrograms     :: !Programs+    -- ^ Field accessor for 'QueryEnv'. Paths to various programs we use.++    , qeProjLoc      :: !(ProjLoc pt)+    -- ^ Field accessor for 'QueryEnv'. Defines path to the project directory,+    -- i.e. a directory containing a @cabal.project@ file++    , qeDistDir      :: !(DistDir pt)+    -- ^ Field accessor for 'QueryEnv'. Defines path to the @dist/@ or+    -- @dist-newstyle/@ directory, aka. /builddir/ in Cabal terminology.++    , qeCacheRef     :: !(IORef (c pt))+    -- ^ Cache for query results, only accessible when type parameter @c@ is+    -- instantiated with 'QueryCache'. This is the case wherever the type alias+    -- 'QueryEnv' is used.++    , qeCacheKeys    :: IORef (CacheKeyCache pt)+    }++projTypeOfQueryEnv :: QueryEnvI c pt -> SProjType pt+projTypeOfQueryEnv = projTypeOfProjLoc . qeProjLoc++type ReadProcessWithCwdAndEnv   =+  String -> CallProcessWithCwdAndEnv String++type CallProcessWithCwdAndEnv a =+  Maybe FilePath -> [(String, EnvOverride)] -> FilePath -> [String] -> IO a++-- | Full instansiation of 'QueryCacheI', with all cache fields visible+type QueryCache+  = QueryCacheI+      PreInfo+      Programs+      ProjInfo+      UnitInfo++-- | 'QueryCacheI', only instantiated with 'PreInfo' cache.+type QCPreInfo progs proj_info unit_info+  = QueryCacheI+      PreInfo+      progs+      proj_info+      unit_info++-- | 'QueryCacheI', only instantiated with 'PreInfo' and configured+-- 'Programs' cache.+type QCProgs proj_info unit_info+  = QueryCacheI+      PreInfo+      Programs+      proj_info+      unit_info++data QueryCacheI pre_info progs proj_info unit_info pt = QueryCache+    { qcPreInfo+        :: !(Maybe ((ProjConf pt, ProjConfModTimes), pre_info pt))+    , qcConfProgs :: !(Maybe (Programs, progs))+    , qcProjInfo+        :: !(Maybe ((ProjConf pt, ProjConfModTimes), proj_info pt))+    , qcUnitInfos :: !(Map DistDirLib unit_info)+    }++data CacheKeyCache pt = CacheKeyCache+    { ckcProjConf :: !(Maybe (ProjConf pt, ProjConfModTimes))+    }++newtype DistDirLib = DistDirLib FilePath+    deriving (Eq, Ord, Read, Show)++type Package pt = Package' (NonEmpty (Unit pt))++-- | A 'Package' is a named collection of many 'Unit's.+data Package' units = Package+    { pPackageName :: !String+    , pSourceDir   :: !FilePath+    , pCabalFile   :: !CabalFile+    , pFlags       :: ![(String, Bool)]+    -- | Cabal flags to set when configuring and building this package.+    , pUnits       :: !units+    } deriving (Show)++-- | A 'Unit' is essentially a "build target". It is used to refer to a set+-- of components (exes, libs, tests etc.) which are managed by a certain+-- instance of the Cabal build-system[1]. We may get information on the+-- components in a unit by retriving the corresponding 'UnitInfo'.+--+-- \[1]: No I'm not talking about the cabal-install /build-tool/, I'm+-- talking about the Cabal /build-system/. Note the distinction. Both+-- cabal-install and Stack use the Cabal build-system (aka @lib:Cabal@)+-- underneath.+--+-- Note that a 'Unit' value is only valid within the 'QueryEnv' context it+-- was created in, this is however this is not enforced by the+-- API. Furthermore if the user changes the underlying project+-- configuration while your application is running even a properly scoped+-- 'Unit' could become invalid because the component it belongs to was+-- removed from the cabal file.+data Unit pt = Unit+    { uUnitId      :: !UnitId+    , uPackage     :: !(Package' ())+    , uDistDir     :: !DistDirLib+    , uImpl        :: !(UnitImpl pt)+    } deriving (Show)++data UnitImpl pt where+  UnitImplV1 :: UnitImpl ('Cabal 'CV1)++  UnitImplV2 ::+    { uiV2ComponentNames :: ![ChComponentName]+    , uiV2Components     :: ![String]+    , uiV2OnlyDependencies :: !Bool+    } -> UnitImpl ('Cabal 'CV2)++  UnitImplStack :: UnitImpl 'Stack++deriving instance Show (UnitImpl pt)++-- | This returns the component a 'Unit' corresponds to. This information is+-- only available if the correspondence happens to be unique and known before+-- querying setup-config for the respective project type. Currently this only+-- applies to @pt=@'V2'.+--+-- This is intended to be used as an optimization, to allow reducing the number+-- of helper invocations for clients that don't need to know the entire project+-- structure.+uComponentName :: Unit pt -> Maybe ChComponentName+uComponentName Unit { uImpl=UnitImplV2 { uiV2ComponentNames=[comp] } } =+    Just comp+uComponentName _ =+    Nothing++-- | The @setup-config@ header. Note that Cabal writes all the package names in+-- the header using 'Data.ByteString.Char8' and hence all characters are+-- truncated from Unicode codepoints to 8-bit Latin-1.+--+-- We can be fairly confident that 'uhSetupId' and 'uhCompilerId' won\'t have+-- names that cause trouble here so it's ok to look at them but user packages+-- are free to have any unicode name.+data UnitHeader = UnitHeader+    { uhPackageId  :: !(ByteString, Version)+      -- ^ Name and version of the source package. This is only going to be+      -- usable for unicode package names starting with @Cabal-3.0.0.0@. See+      -- 'uiPackageId' for an alternative that always works.+    , uhSetupId    :: !(ByteString, Version)+      -- ^ Name and version of the @Setup.hs@ implementation. We expect+      -- @"Cabal"@ here, naturally.+    , uhCompilerId :: !(ByteString, Version)+      -- ^ Name and version of the compiler that was used to build+      -- Setup.hs. WARNING: This does not identify the GHC version the project+      -- is configured to use!+    } deriving (Eq, Ord, Read, Show)++newtype UnitId = UnitId String+    deriving (Eq, Ord, Read, Show)++-- | The information extracted from a 'Unit'\'s on-disk configuration cache.+data UnitInfo = UnitInfo+    { uiUnitId                :: !UnitId+    -- ^ A unique identifier of this unit within the originating project.++    , uiPackageId             :: !(String, Version)+    -- ^ The package-name and version this unit belongs to.++    , uiComponents            :: !(Map ChComponentName ChComponentInfo)+    -- ^ The components of the unit: libraries, executables, test-suites,+    -- benchmarks and so on.++    , uiCompilerId            :: !(String, Version)+    -- ^ The version of GHC the unit is configured to use++    , uiPackageFlags          :: !([(String, Bool)])+    -- ^ Flag definitions from cabal file++    , uiConfigFlags           :: ![(String, Bool)]+    -- ^ Flag assignments from active configuration++    , uiNonDefaultConfigFlags :: ![(String, Bool)]+    -- ^ Flag assignments from setup-config which differ from the default+    -- setting. This can also include flags which cabal decided to modify,+    -- i.e. don't rely on these being the flags set by the user directly.++    , uiModTimes              :: !UnitModTimes+    -- ^ Key for cache invalidation. When this is not equal to the value+    -- returned by 'getUnitModTimes' this 'UnitInfo' is considered invalid.+    } deriving (Eq, Ord, Read, Show)++-- | Files relevant to the project-scope configuration. We gather them here so+-- we can refer to their paths conveniently throughout the code. These files are+-- not necessarily guaranteed to even exist.+data ProjConf pt where+  ProjConfV1 ::+    { pcV1CabalFile :: !FilePath+    } -> ProjConf ('Cabal 'CV1)++  ProjConfV2 ::+    { pcV2CabalProjFile       :: !FilePath+    , pcV2CabalProjLocalFile  :: !FilePath+    , pcV2CabalProjFreezeFile :: !FilePath+    } -> ProjConf ('Cabal 'CV2)++  ProjConfStack ::+    { pcStackYaml :: !FilePath+    } -> ProjConf 'Stack++projTypeOfProjConf :: ProjConf pt -> SProjType pt+projTypeOfProjConf ProjConfV1{}    = SCabal SCV1+projTypeOfProjConf ProjConfV2{}    = SCabal SCV2+projTypeOfProjConf ProjConfStack{} = SStack+++-- This is supposed to be opaque, as it's only meant to be used only for cache+-- invalidation.+newtype ProjConfModTimes = ProjConfModTimes [(FilePath, EpochTime)]+    deriving (Eq, Show)++-- | Project-scope information cache.+data ProjInfo pt = ProjInfo+  { piCabalVersion     :: !Version+  , piPackages         :: !(NonEmpty (Package pt))+  , piImpl             :: !(ProjInfoImpl pt)+  , piProjConfModTimes :: !ProjConfModTimes+  -- ^ Key for cache invalidation. When this is not equal to the return+  -- value of 'getProjConfModTime' this 'ProjInfo' is considered invalid.+  } deriving (Show)++data ProjInfoImpl pt where+  ProjInfoV1 ::+    { piV1SetupHeader :: !UnitHeader+    } -> ProjInfoImpl ('Cabal 'CV1)++  ProjInfoV2 ::+    { piV2Plan        :: !PlanJson+    , piV2PlanModTime :: !EpochTime+    , piV2CompilerId  :: !(String, Version)+    } -> ProjInfoImpl ('Cabal 'CV2)++  ProjInfoStack :: ProjInfoImpl 'Stack++instance Show (ProjInfoImpl pt) where+    show ProjInfoV1 {..} = concat+      [ "ProjInfoV1 {"+      , "piV1SetupHeader = ", show piV1SetupHeader, ", "+      , "}"+      ]+    show ProjInfoV2 {..} = concat+      [ "ProjInfoV2 {"+      , "piV2Plan = ", show piV2Plan, ", "+      , "piV2PlanModTime = ", show piV2PlanModTime, ", "+      , "piV2CompilerId = ", show piV2CompilerId+      , "}"+      ]+    show ProjInfoStack{} = concat+      [ "ProjInfoStack {"+      , "}"+      ]++data UnitModTimes = UnitModTimes+    { umtPkgYaml     :: !(Maybe (FilePath, EpochTime))+    , umtCabalFile   :: !(FilePath, EpochTime)+    , umtSetupConfig :: !(Maybe (FilePath, EpochTime))+    } deriving (Eq, Ord, Read, Show)+data PreInfo pt where+  PreInfoCabal :: PreInfo ('Cabal cpt)+  PreInfoStack ::+    { piStackProjPaths :: !StackProjPaths+    } -> PreInfo 'Stack++instance Show (PreInfo pt) where+    show PreInfoCabal{} = concat+      [ "PreInfoCabal {"+      , "}"+      ]+    show PreInfoStack {..} = concat+      [ "PreInfoStack {"+      , "piStackProjPaths = ", show piStackProjPaths+      , "}"+      ]++newtype CabalFile = CabalFile FilePath+    deriving (Show)++data StackProjPaths = StackProjPaths+    { sppGlobalPkgDb :: !PackageDbDir+    , sppSnapPkgDb   :: !PackageDbDir+    , sppLocalPkgDb  :: !PackageDbDir+    , sppCompExe     :: !FilePath+    } deriving (Show)+++-- Beware: GHC 8.0.2 doesn't like these being recursively defined for some+-- reason so just keep them unrolled.+type Verbose = (?verbose :: Word -> Bool)+type Env     = ( ?progs :: Programs+               , ?verbose :: Word -> Bool)+type Progs   = (?progs :: Programs)++-- | Configurable paths to various programs we use.+data Programs = Programs+    { cabalProgram    :: !FilePath+      -- ^ The path to the @cabal@ program.+    , cabalProjArgs   :: ![String]+    , cabalUnitArgs   :: ![String]++    , stackProgram    :: !FilePath+      -- ^ The path to the @stack@ program.+    , stackProjArgs   :: ![String]+    , stackUnitArgs   :: ![String]+    , stackEnv        :: ![(String, EnvOverride)]+      --  ^ TODO: Stack doesn't support passing the compiler as a+      --  commandline option so we meddle with PATH instead. We should+      --  patch that upstream.++    , ghcProgram    :: !FilePath+    -- ^ The path to the @ghc@ program.++    , ghcPkgProgram :: !FilePath+    -- ^ The path to the @ghc-pkg@ program. If not changed it will be derived+    -- from the path to 'ghcProgram'.++    , haddockProgram :: !FilePath+    -- ^ The path to the @haddock@ program. If not changed it will be+    -- derived from the path to 'ghcProgram'.+    } deriving (Eq, Ord, Show, Read, Generic, Typeable)++-- | By default all programs use their unqualified names, i.e. they will be+-- searched for on @PATH@.+defaultPrograms :: Programs+defaultPrograms =+  Programs "cabal" [] []  "stack" [] [] [] "ghc" "ghc-pkg" "haddock"++data EnvOverride+    = EnvPrepend String+    | EnvAppend String+    | EnvReplace String+      deriving (Eq, Ord, Show, Read, Generic, Typeable)++data CompileOptions = CompileOptions+    { oVerbose       :: Bool+    , oCabalPkgDb    :: Maybe PackageDbDir+    , oCabalVersion  :: Maybe Version+    , oPrograms      :: Programs+    }++oCabalProgram :: Env => FilePath+oCabalProgram = cabalProgram ?progs++defaultCompileOptions :: CompileOptions+defaultCompileOptions =+    CompileOptions False Nothing Nothing defaultPrograms++newtype PackageDbDir = PackageDbDir { unPackageDbDir :: FilePath }+    deriving (Show)+newtype PackageEnvFile = PackageEnvFile { unPackageEnvFile :: FilePath }+    deriving (Show)

@@ -0,0 +1,51 @@+-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-|+Module      : CabalHelper.Compiletime.Types.RelativePath+License     : Apache-2.0+-}++module CabalHelper.Compiletime.Types.RelativePath+    ( RelativePath+    , mkRelativePath+    , unRelativePath+    ) where++import System.FilePath++-- | A path guaranteed to be relative and not escape the base path. The+-- constructor is not exposed, use the 'mkRelativePath' smart constructor.+newtype RelativePath = RelativePath { unRelativePath :: FilePath }+    deriving (Show)++-- | Smart constructor for 'RelativePath'. Checks if the given path+-- satisfies the constraints and throws 'UserError' if not.+mkRelativePath :: FilePath -> RelativePath+mkRelativePath dir+  | isAbsolute dir =+    error $ "mkRelativePath: the path given was absolute! got: " ++ dir+  | doesRelativePathEscapeCWD dir =+    error $ "mkRelativePath: the path given escapes the base dir! got: " ++ dir+  | otherwise =+    RelativePath dir++doesRelativePathEscapeCWD :: FilePath -> Bool+doesRelativePathEscapeCWD path =+    go [] $ splitDirectories $ normalise path+       -- normalise collapses '.' in path, this is very important or this+       -- check would be traivial to defeat. For example './../' would be+       -- able to escape.+  where+    go (_:xs) ("..":ys) = go xs ys+    go    []  ("..":__) = True+    go    xs  (y   :ys) = go (y:xs) ys+    go    _         []  = False

@@ -1,227 +0,0 @@--- cabal-helper: Simple interface to Cabal's configuration state--- Copyright (C) 2015-2018  Daniel Gröber <cabal-helper@dxld.at>------ This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- (at your option) any later version.------ This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.------ You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.-{-# LANGUAGE RecordWildCards, NamedFieldPuns, FlexibleContexts, ViewPatterns #-}-module Main where--import Cabal.Plan-import Control.Applicative-import Control.Monad-import Data.Char-import Data.List-import Data.Maybe-import Data.String-import Text.Printf-import Text.Show.Pretty-import System.Console.GetOpt-import System.Environment-import System.Directory-import System.FilePath-import System.Process-import System.Exit-import System.IO-import Prelude--import qualified Data.Text as Text-import qualified Data.Map.Strict as Map--import Distribution.System (buildPlatform)-import Distribution.Text (display)-import Distribution.Verbosity (silent, deafening)-import Distribution.Package (packageName, packageVersion)-import Distribution.Simple.GHC as GHC (configure)--import Paths_cabal_helper (version)-import CabalHelper.Compiletime.Compat.ProgramDb-    ( defaultProgramDb, programPath, lookupProgram, ghcProgram, ghcPkgProgram)-import CabalHelper.Compiletime.Compat.Version-import CabalHelper.Compiletime.Compile-import CabalHelper.Compiletime.Types-import CabalHelper.Shared.Common-import CabalHelper.Shared.InterfaceTypes--usage :: IO ()-usage = do-  prog <- getProgName-  hPutStr stderr $ "Usage: " ++ prog ++ " " ++ usageMsg- where-   usageMsg = "\-\( print-appcachedir\n\-\| print-build-platform\n\-\| [--verbose]\n\-\  [--with-ghc=GHC_PATH]\n\-\  [--with-ghc-pkg=GHC_PKG_PATH]\n\-\  [--with-cabal=CABAL_PATH]\n\-\  [--with-cabal-version=VERSION]\n\-\  [--with-cabal-pkg-db=PKG_DB]\n\-\  v1-style PROJ_DIR DIST_DIR \n\-\      ( print-exe | package-id | [CABAL_HELPER_ARGS...] )\n\-\  v2-style PROJ_DIR DIST_NEWSTYLE_DIR DIST_DIR\n\-\      ( print-exe | package-id | [CABAL_HELPER_ARGS...] )\n\-\)\n"--globalArgSpec :: [OptDescr (Options -> Options)]-globalArgSpec =-      [ option "h" ["help"] "Display help message" $-              NoArg $ \o -> o { oHelp = True }-      , option "" ["verbose"] "Be more verbose" $-              NoArg $ \o -> o { oVerbose = True }--      , option "" ["with-ghc"] "GHC executable to use" $-              reqArg "PROG" $ \p o -> o { oGhcProgram = p }--      , option "" ["with-ghc-pkg"] "ghc-pkg executable to use (only needed when guessing from GHC path fails)" $-              reqArg "PROG" $ \p o -> o { oGhcPkgProgram = p }--      , option "" ["with-cabal"] "cabal-install executable to use" $-               reqArg "PROG" $ \p o -> o { oCabalProgram = p }--      , option "" ["with-cabal-version"] "Cabal library version to use" $-               reqArg "VERSION" $ \p o -> o { oCabalVersion = Just $ parseVer p }--      , option "" ["with-cabal-pkg-db"] "package database to look for Cabal library in" $-               reqArg "PKG_DB" $ \p o -> o { oCabalPkgDb = Just (PackageDbDir p) }--      ]- where-   option :: [Char] -> [String] -> String -> ArgDescr a -> OptDescr a-   option s l udsc dsc = Option s l dsc udsc--   reqArg :: String -> (String -> a) -> ArgDescr a-   reqArg udsc dsc = ReqArg dsc udsc--parseCommandArgs :: Options -> [String] -> (Options, [String])-parseCommandArgs opts argv-    = case getOpt RequireOrder globalArgSpec argv of-        (o,r,[])   -> (foldr id opts o, r)-        (_,_,errs) ->-            panic $ "Parsing command options failed:\n" ++ concat errs--guessProgramPaths :: Options -> IO Options-guessProgramPaths opts = do-    let v | oVerbose opts = deafening-          | otherwise     = silent--        mGhcPath0    | same oGhcProgram opts dopts = Nothing-                     | otherwise = Just $ oGhcProgram opts-        mGhcPkgPath0 | same oGhcPkgProgram opts dopts = Nothing-                     | otherwise = Just $ oGhcPkgProgram opts--    (_compiler, _mplatform, progdb)-        <- GHC.configure-               v-               mGhcPath0-               mGhcPkgPath0-               defaultProgramDb--    let mghcPath1    = programPath <$> lookupProgram ghcProgram progdb-        mghcPkgPath1 = programPath <$> lookupProgram ghcPkgProgram progdb--    return $ opts { oGhcProgram    = fromMaybe (oGhcProgram opts) mghcPath1-                  , oGhcPkgProgram = fromMaybe (oGhcProgram opts) mghcPkgPath1-                  }- where-   same f o o'  = f o == f o'-   dopts = defaultOptions--overrideVerbosityEnvVar :: Options -> IO Options-overrideVerbosityEnvVar opts = do-  x <- lookup  "CABAL_HELPER_DEBUG" <$> getEnvironment-  return $ case x of-    Just _  -> opts { oVerbose = True }-    Nothing -> opts--main :: IO ()-main = handlePanic $ do-  (opts', args) <- parseCommandArgs defaultOptions <$> getArgs-  opts <- overrideVerbosityEnvVar =<< guessProgramPaths opts'-  case args of-    _ | oHelp opts -> usage-    [] -> usage-    "help":[] -> usage-    "version":[] -> putStrLn $ showVersion version-    "print-appdatadir":[] -> putStrLn =<< appCacheDir-    "print-appcachedir":[] -> putStrLn =<< appCacheDir-    "print-build-platform":[] -> putStrLn $ display buildPlatform--    _:projdir:_distdir:"package-id":[] -> do-      let v | oVerbose opts = deafening-            | otherwise    = silent-      -- ghc-mod will catch multiple cabal files existing before we get here-      [cfile] <- filter isCabalFile <$> getDirectoryContents projdir-      gpd <- readPackageDescription v (projdir </> cfile)-      putStrLn $ show $-        [Just $ ChResponseVersion (display (packageName gpd)) (toDataVersion $ packageVersion gpd)]--    "v2-style":projdir:distdir_newstyle:unitid':args' -> do-      let unitid = UnitId $ Text.pack unitid'-      let plan_path = distdir_newstyle </> "cache" </> "plan.json"-      plan@PlanJson {pjCabalLibVersion=Ver (makeDataVersion -> pjCabalLibVersion) }-          <- decodePlanJson plan_path-      case oCabalVersion opts of-        Just ver | pjCabalLibVersion /= ver -> let-            sver = showVersion ver-            spjVer = showVersion pjCabalLibVersion-          in panic $ printf "\-\Cabal version %s was requested but plan.json was written by version %s" sver spjVer-        _ -> case Map.lookup unitid $ pjUnits plan of-               Just u@Unit {uType} | uType /= UnitTypeLocal -> do-                 panic $ "\-\UnitId '"++ unitid' ++"' points to non-local unit: " ++ ppShow u-               Just Unit {uDistDir=Nothing} -> panic $ printf "\-\plan.json doesn't contain 'dist-dir' for UnitId '"++ unitid' ++"'"-               Just Unit {uType=UnitTypeLocal, uDistDir=Just distdir} ->-                 runHelper opts projdir (Just (plan, distdir_newstyle)) distdir pjCabalLibVersion args'-               _ -> let-                   units = map (\(UnitId u) -> Text.unpack u)-                         $ Map.keys-                         $ Map.filter ((==UnitTypeLocal) . uType)-                         $ pjUnits plan--                   units_list = unlines $ map ("  "++) units-                 in-                   panic $ "\-\UnitId '"++ unitid' ++"' not found in plan.json, available local units:\n" ++ units_list--    "v1-style":projdir:distdir:args' -> do-      cfgf <- canonicalizePath (distdir </> "setup-config")-      mhdr <- getCabalConfigHeader cfgf-      case (mhdr, oCabalVersion opts) of-        (Nothing, _) -> panic $ printf "\-\Could not read Cabal's persistent setup configuration header\n\-\- Check first line of: %s\n\-\- Maybe try: $ cabal configure" cfgf-        (Just (hdrCabalVersion, _), Just ver)-          | hdrCabalVersion /= ver -> panic $ printf "\-\Cabal version %s was requested but setup configuration was\n\-\written by version %s" (showVersion ver) (showVersion hdrCabalVersion)-        (Just (hdrCabalVersion, _), _) ->-          runHelper opts projdir Nothing distdir hdrCabalVersion args'-    _ -> do-      hPutStrLn stderr "Invalid command line!"-      usage-      exitWith $ ExitFailure 1--runHelper :: Options -> FilePath -> Maybe (PlanJson, FilePath) -> FilePath -> DataVersion -> [String] -> IO ()-runHelper opts projdir mnewstyle distdir cabal_ver args' = do-  eexe <- compileHelper opts cabal_ver projdir mnewstyle distdir-  case eexe of-      Left e -> exitWith e-      Right exe -> do-        case args' of-          "print-exe":_ -> putStrLn exe-          _ -> do-            (_,_,_,h) <- createProcess $ proc exe $ projdir : distdir : args'-            exitWith =<< waitForProcess h

@@ -0,0 +1,228 @@+-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2015-2018  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-# LANGUAGE CPP, BangPatterns, RecordWildCards, RankNTypes, ViewPatterns,+  TupleSections #-}+{-# OPTIONS_GHC -fno-warn-unused-imports #-}++#ifdef MIN_VERSION_Cabal+#undef CH_MIN_VERSION_Cabal+#define CH_MIN_VERSION_Cabal MIN_VERSION_Cabal+#endif++module CabalHelper.Runtime.Compat+    ( UnitId+    , componentNameToCh+    , unUnqualComponentName'+    , componentNameFromComponent+    , componentOutDir+    , internalPackageDBPath+    ) where++import System.FilePath++import Distribution.PackageDescription+  ( PackageDescription+  , GenericPackageDescription(..)+  , Flag(..)+  , FlagName+  , FlagAssignment+  , Executable(..)+  , Library(..)+  , TestSuite(..)+  , Benchmark(..)+  , BuildInfo(..)+  , TestSuiteInterface(..)+  , BenchmarkInterface(..)+  , withLib+  )+import Distribution.Simple.LocalBuildInfo+  ( ComponentName(..)+  , Component(..)+  , LocalBuildInfo(..)+  )+++#if CH_MIN_VERSION_Cabal(1,24,0)+import Distribution.Package (UnitId)+#else+import Distribution.Package (InstalledPackageId)+#endif++#if CH_MIN_VERSION_Cabal(1,25,0)+-- >=1.25+import Distribution.PackageDescription+  ( unFlagName+  -- , mkFlagName+  )+import Distribution.Types.ForeignLib+  ( ForeignLib(..)+  )+import Distribution.Types.UnqualComponentName+  ( UnqualComponentName+  , unUnqualComponentName+  )+#else+-- <1.25+import Distribution.PackageDescription+  ( FlagName(FlagName)+  )+#endif++#if CH_MIN_VERSION_Cabal(2,0,0)+-- CPP >= 2.0+import Distribution.Simple.LocalBuildInfo+  ( allLibModules+  , componentBuildDir+  )+import Distribution.Simple.Register+  ( internalPackageDBPath+  )+import Distribution.Backpack+  ( OpenUnitId(..),+    OpenModule(..)+  )+import Distribution.ModuleName+  ( ModuleName+  )+import Distribution.Types.ComponentId+  ( unComponentId+  )+import Distribution.Types.ComponentLocalBuildInfo+  ( maybeComponentInstantiatedWith+  )+import Distribution.Types.ModuleRenaming+  ( ModuleRenaming(..),+    isDefaultRenaming+  )+import Distribution.Types.MungedPackageId+  ( MungedPackageId+  )+import Distribution.Types.UnitId+  ( UnitId+  , unDefUnitId+  , unUnitId+  )+import Distribution.Types.UnitId+  ( DefUnitId+  )+import Distribution.Utils.NubList+  ( toNubListR+  )+import Distribution.Version+  ( versionNumbers+  , mkVersion+  )+import qualified Distribution.InstalledPackageInfo as Installed+#endif++#if CH_MIN_VERSION_Cabal(2,2,0)+import Distribution.Types.GenericPackageDescription+  ( unFlagAssignment+  )+#endif++#if CH_MIN_VERSION_Cabal(2,5,0)+import Distribution.Types.LibraryName+  ( LibraryName (..)+  )+#endif+++import CabalHelper.Shared.Common+import CabalHelper.Shared.InterfaceTypes++++++++#if !CH_MIN_VERSION_Cabal(1,24,0)+type UnitId = InstalledPackageId+#endif++++componentNameToCh :: ComponentName -> ChComponentName+#if CH_MIN_VERSION_Cabal(2,5,0)+componentNameToCh (CLibName LMainLibName) = ChLibName ChMainLibName+componentNameToCh (CLibName (LSubLibName n)) = ChLibName $ ChSubLibName (unUnqualComponentName' n)+#elif CH_MIN_VERSION_Cabal(2,0,0)+componentNameToCh CLibName = ChLibName ChMainLibName+componentNameToCh (CSubLibName n) = ChLibName $ ChSubLibName (unUnqualComponentName' n)+#else+componentNameToCh CLibName = ChLibName ChMainLibName+#endif+#if CH_MIN_VERSION_Cabal(2,0,0)+componentNameToCh (CFLibName n) = ChFLibName (unUnqualComponentName' n)+#endif+componentNameToCh (CExeName n) = ChExeName (unUnqualComponentName' n)+componentNameToCh (CTestName n) = ChTestName (unUnqualComponentName' n)+componentNameToCh (CBenchName n) = ChBenchName (unUnqualComponentName' n)+++#if CH_MIN_VERSION_Cabal(1,25,0)+-- CPP >= 1.25+unUnqualComponentName' :: UnqualComponentName -> String+unUnqualComponentName' = unUnqualComponentName+#else+unUnqualComponentName' :: a -> a+unUnqualComponentName' = id+#endif+++componentNameFromComponent :: Component -> ComponentName+#if CH_MIN_VERSION_Cabal(2,5,0)+componentNameFromComponent (CLib Library { libName = n }) = CLibName n+componentNameFromComponent (CFLib ForeignLib {..}) = CFLibName foreignLibName+#elif CH_MIN_VERSION_Cabal(1,25,0)+-- CPP >= 1.25 (redundant)+componentNameFromComponent (CLib Library { libName = Nothing }) = CLibName+componentNameFromComponent (CLib Library { libName = Just n })  = CSubLibName n+componentNameFromComponent (CFLib ForeignLib {..}) = CFLibName foreignLibName+#else+-- CPP < 1.25+componentNameFromComponent (CLib Library {}) = CLibName+#endif+componentNameFromComponent (CExe Executable {..}) = CExeName exeName+componentNameFromComponent (CTest TestSuite {..}) = CTestName testName+componentNameFromComponent (CBench Benchmark {..}) = CBenchName benchmarkName+++componentOutDir :: LocalBuildInfo -> Component -> FilePath+componentOutDir lbi (CLib Library {..})=+    buildDir lbi+#if CH_MIN_VERSION_Cabal(2,0,0)+componentOutDir lbi (CFLib ForeignLib {..}) =+    componentOutDir' lbi (unUnqualComponentName foreignLibName)+#endif+componentOutDir lbi (CExe Executable {..}) =+    componentOutDir' lbi (unUnqualComponentName' exeName)+componentOutDir lbi (CTest TestSuite { testInterface = TestSuiteLibV09 _ _, ..}) =+    componentOutDir' lbi (unUnqualComponentName' testName ++ "Stub")+componentOutDir lbi (CTest TestSuite { testInterface = _, ..}) =+    componentOutDir' lbi (unUnqualComponentName' testName)+componentOutDir lbi (CBench Benchmark { benchmarkInterface = _, ..})=+    componentOutDir' lbi (unUnqualComponentName' benchmarkName)++componentOutDir' :: LocalBuildInfo -> String -> FilePath+componentOutDir' lbi compName' =+  ----- Copied from Distribution/Simple/GHC.hs:buildOrReplExe+  let targetDir = (buildDir lbi) </> compName'+      compDir    = targetDir </> (compName' ++ "-tmp")+  in compDir++#if !CH_MIN_VERSION_Cabal(2,0,0)+internalPackageDBPath :: LocalBuildInfo -> FilePath -> FilePath+internalPackageDBPath lbi distPref =+  distPref </> "package.conf.inplace"+#endif

@@ -0,0 +1,519 @@+-- cabal-helper: Simple interface to Cabal's configuration state+-- Copyright (C) 2015-2018  Daniel Gröber <cabal-helper@dxld.at>+--+-- SPDX-License-Identifier: Apache-2.0+--+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at+--+--     http://www.apache.org/licenses/LICENSE-2.0++{-# LANGUAGE CPP, BangPatterns, RecordWildCards, RankNTypes, ViewPatterns,+  TupleSections #-}+{-# OPTIONS_GHC -fno-warn-unused-imports #-}+{-  # OPTIONS_GHC -Wno-missing-signatures #-}+{-  # OPTIONS_GHC -fno-warn-incomplete-patterns #-}++#ifdef MIN_VERSION_Cabal+#undef CH_MIN_VERSION_Cabal+#define CH_MIN_VERSION_Cabal MIN_VERSION_Cabal+#endif++module CabalHelper.Runtime.HelperMain (helper_main) where++import Distribution.Simple.Utils (cabalVersion)+import Distribution.Simple.Configure+import Distribution.Package+  ( PackageIdentifier+  , PackageId+  , packageName+  , packageVersion+  )+import Distribution.PackageDescription+  ( PackageDescription+  , GenericPackageDescription(..)+  , Flag(..)+  , FlagName+  , FlagAssignment+  , Executable(..)+  , Library(..)+  , TestSuite(..)+  , Benchmark(..)+  , BuildInfo(..)+  , TestSuiteInterface(..)+  , BenchmarkInterface(..)+  , withLib+  )+import Distribution.PackageDescription.Configuration+  ( flattenPackageDescription+  )+import Distribution.Simple.Program+  ( requireProgram+  , ghcProgram+  )+import Distribution.Simple.Program.Types+  ( ConfiguredProgram(..)+  )+import Distribution.Simple.Configure+  ( getPersistBuildConfig+  )+import Distribution.Simple.LocalBuildInfo+  ( LocalBuildInfo(..)+  , Component(..)+  , ComponentName(..)+  , ComponentLocalBuildInfo(..)+  , componentBuildInfo+  , withAllComponentsInBuildOrder+  , withLibLBI+  , withExeLBI+  )+import Distribution.Simple.GHC+  ( componentGhcOptions+  )+import Distribution.Simple.Program.GHC+  ( GhcOptions(..)+  , renderGhcOptions+  )+import Distribution.Simple.Setup+  ( ConfigFlags(..)+  , Flag(..)+  , fromFlagOrDefault+  )+import Distribution.Simple.Build+  ( initialBuildSteps+  )+import Distribution.Simple.BuildPaths+  ( cppHeaderName+  )+import Distribution.Simple.Compiler+  ( PackageDB(..)+  , compilerId+  )+import Distribution.Compiler+  ( CompilerId(..)+  )+import Distribution.ModuleName+  ( components+  )+import qualified Distribution.ModuleName as C+  ( ModuleName+  )+import Distribution.Text+  ( display+  )+import Distribution.Verbosity+  ( Verbosity+  , silent+  , deafening+  , normal+  )+import Distribution.Version+  ( Version+  )++#if CH_MIN_VERSION_Cabal(1,22,0)+-- CPP >= 1.22+import Distribution.Utils.NubList+#endif++#if CH_MIN_VERSION_Cabal(1,23,0)+-- >= 1.23+import Distribution.Simple.LocalBuildInfo+  ( localUnitId+  )+#else+-- <= 1.22+import Distribution.Simple.LocalBuildInfo+  ( inplacePackageId+  )+#endif++#if CH_MIN_VERSION_Cabal(1,25,0)+-- >=1.25+import Distribution.PackageDescription+  ( unFlagName+  -- , mkFlagName+  )+import Distribution.Types.ForeignLib+  ( ForeignLib(..)+  )+import Distribution.Types.UnqualComponentName+  ( UnqualComponentName+  , unUnqualComponentName+  )+#else+-- <1.25+import Distribution.PackageDescription+  ( FlagName(FlagName)+  )+#endif++#if CH_MIN_VERSION_Cabal(2,0,0)+-- CPP >= 2.0+import Distribution.Simple.LocalBuildInfo+  ( allLibModules+  , componentBuildDir+  )+import Distribution.Backpack+  ( OpenUnitId(..),+    OpenModule(..)+  )+import Distribution.ModuleName+  ( ModuleName+  )+import Distribution.Types.ComponentId+  ( unComponentId+  )+import Distribution.Types.ComponentLocalBuildInfo+  ( maybeComponentInstantiatedWith+  )+import Distribution.Types.ModuleRenaming+  ( ModuleRenaming(..),+    isDefaultRenaming+  )+import Distribution.Types.MungedPackageId+  ( MungedPackageId+  )+import Distribution.Types.UnitId+  ( UnitId+  , unDefUnitId+  , unUnitId+  )+import Distribution.Types.UnitId+  ( DefUnitId+  )+import Distribution.Utils.NubList+  ( toNubListR+  )+import Distribution.Version+  ( versionNumbers+  , mkVersion+  )+import qualified Distribution.InstalledPackageInfo as Installed+#endif++#if CH_MIN_VERSION_Cabal(2,2,0)+import Distribution.Types.GenericPackageDescription+  ( unFlagAssignment+  )+#endif++import Control.Applicative ((<$>), (<*>), ZipList(..))+import Control.Arrow (first, second, (&&&))+import Control.Monad+import Control.Exception (catch, PatternMatchFail(..))+import Data.List+import qualified Data.Map.Strict as Map+import Data.Maybe+import Data.Monoid+import Data.IORef+import qualified Data.Version as DataVersion+import System.Environment+import System.Directory+import System.FilePath+import System.Exit+import System.IO+import System.IO.Unsafe (unsafeInterleaveIO, unsafePerformIO)+import Text.Printf++import CabalHelper.Shared.Common+import CabalHelper.Shared.InterfaceTypes+import CabalHelper.Runtime.Compat++usage :: IO ()+usage = do+  prog <- getProgName+  hPutStr stderr $ "Usage: " ++ prog ++ " " ++ usageMsg+ where+   usageMsg = ""+     ++"PROJ_DIR DIST_DIR (v1|v2)\n"+     ++"  ( version\n"+     ++"  | flags\n"+     ++"  | config-flags\n"+     ++"  | non-default-config-flags\n"+     ++"  | write-autogen-files\n"+     ++"  | compiler-id\n"+     ++"  | component-info\n"+     ++"  | print-lbi [--human]\n"+     ++"  ) ...\n"++commands :: [String]+commands = [ "flags"+           , "config-flags"+           , "non-default-config-flags"+           , "write-autogen-files"+           , "compiler-id"+           , "package-db-stack"+           , "component-info"+           , "print-lbi"+           ]++helper_main :: [String] -> IO [Maybe ChResponse]+helper_main args = do+  cfile : distdir : pt : args'+    <- case args of+         [] -> usage >> exitFailure+         _ -> return args++  ddexists <- doesDirectoryExist distdir+  when (not ddexists) $ do+         errMsg $ "distdir '"++distdir++"' does not exist"+         exitFailure++  v <- maybe silent (const deafening) . lookup  "CABAL_HELPER_DEBUG" <$> getEnvironment+  lbi <- unsafeInterleaveIO $ getPersistBuildConfig distdir+  gpd <- unsafeInterleaveIO $ readPackageDescription v cfile+  let pd = localPkgDescr lbi+  let lvd = (lbi, v, distdir)++  let+      -- a =<< b $$ c   ==  (a =<< b) $$ c+      infixr 2 $$+      ($$) = ($)++      collectCmdOptions :: [String] -> [[String]]+      collectCmdOptions =+          reverse . map reverse . foldl f [] . dropWhile isOpt+       where+         isOpt = ("--" `isPrefixOf`)+         f [] x = [[x]]+         f (a:as) x+             | isOpt x = (x:a):as+             | otherwise = [x]:(a:as)++  let cmds = collectCmdOptions args'++  flip mapM cmds $$ \x -> do+  case x of+    "version":[] ->+      return $ Just $ ChResponseVersion ("Cabal", toDataVersion cabalVersion)++    "package-id":[] ->+      return $ Just $ ChResponseVersion $ (,)+        (display (packageName gpd))+        (toDataVersion (packageVersion gpd))++    "flags":[] -> do+      return $ Just $ ChResponseFlags $ sort $+        map (flagName' &&& flagDefault) $ genPackageFlags gpd++    "config-flags":[] -> do+      return $ Just $ ChResponseFlags $ sort $+        map (first unFlagName)+#if CH_MIN_VERSION_Cabal(2,2,0)+          $ unFlagAssignment $ configConfigurationsFlags+#else+          $ configConfigurationsFlags+#endif+          $ configFlags lbi++    "non-default-config-flags":[] -> do+      let flagDefinitons = genPackageFlags gpd+          flagAssgnments =+#if CH_MIN_VERSION_Cabal(2,2,0)+            unFlagAssignment $ configConfigurationsFlags+#else+            configConfigurationsFlags+#endif+              $ configFlags lbi+          nonDefaultFlags =+              [ (flag_name, val)+              | MkFlag {flagName=(unFlagName -> flag_name'), flagDefault=def_val} <- flagDefinitons+              , (unFlagName -> flag_name, val) <- flagAssgnments+              , flag_name == flag_name'+              , val /= def_val+              ]+      return $ Just $ ChResponseFlags $ sort nonDefaultFlags++    "write-autogen-files":[] -> do+      initialBuildStepsForAllComponents distdir pd lbi v+      return Nothing++    "compiler-id":[] -> do+      let CompilerId comp ver = compilerId $ compiler lbi+      return $ Just $ ChResponseVersion $ (,) (show comp) (toDataVersion ver)++    "component-info":[] -> do+      res <- componentsInfo lvd pt+      return $ Just $ ChResponseComponentsInfo res++    "print-lbi":flags ->+      case flags of+        ["--human"] -> print lbi >> return Nothing+        _           -> return $ Just $ ChResponseLbi $ show lbi++    cmd:_ | not (cmd `elem` commands) ->+            errMsg ("Unknown command: " ++ cmd) >> usage >> exitFailure+    _ ->+            errMsg "Invalid usage!" >> usage >> exitFailure++type ProjectType = String -- either "v1" or "v2"++componentsInfo+    :: (LocalBuildInfo, Verbosity, FilePath)+    -> ProjectType+    -> IO (Map.Map ChComponentName ChComponentInfo)+componentsInfo lvd@(lbi, v, distdir) pt = do+      let mod_ghc_opts opts+            | pt == "v1" = opts {+                ghcOptPackageDBs =+                  -- c.f. Simple/Build.hs createInternalPackageDB call+                  ghcOptPackageDBs opts +++                  [SpecificPackageDB $ internalPackageDBPath lbi distdir]+                }+            | pt == "v2" = opts+            | otherwise = error $ "Unknown project-type '"++pt++"'!"++      ciGhcOptions <- componentOptions lvd mod_ghc_opts++      ciSourceDirs <- componentsMap lbi v distdir $ \_ _ bi -> return $ hsSourceDirs bi++      ciEntrypoints <- componentsMap lbi v distdir $ \c _clbi _bi ->+               return $ componentEntrypoints c++      let comp_name = map fst ciGhcOptions+          uiComponents = Map.fromList+                      $ map (ciComponentName &&& id)+                      $ getZipList+                      $ ChComponentInfo+                     <$> ZipList comp_name+                     <*> ZipList (map snd ciGhcOptions)+                     <*> ZipList (map snd ciSourceDirs)+                     <*> ZipList (map snd ciEntrypoints)++      return uiComponents+++flagName' :: Distribution.PackageDescription.Flag -> String+flagName' = unFlagName . flagName++componentsMap :: LocalBuildInfo+              -> Verbosity+              -> FilePath+              -> (   Component+                  -> ComponentLocalBuildInfo+                  -> BuildInfo+                  -> IO a)+              -> IO [(ChComponentName, a)]+componentsMap lbi _v _distdir f = do+    let pd = localPkgDescr lbi++    lr <- newIORef []++    -- withComponentsLBI is deprecated but also exists in very old versions+    -- it's equivalent to withAllComponentsInBuildOrder in newer versions+    withAllComponentsInBuildOrder pd lbi $ \c clbi -> do+        let bi = componentBuildInfo c+            name = componentNameToCh $ componentNameFromComponent c++        l' <- readIORef lr+        r <- f c clbi bi+        writeIORef lr $ (name, r) : l'++    reverse <$> readIORef lr++componentOptions'+    :: (LocalBuildInfo, Verbosity, FilePath)+    -> (LocalBuildInfo -> Verbosity -> GhcOptions -> IO a)+    -> (GhcOptions -> GhcOptions)+    -> IO [(ChComponentName, a)]+componentOptions' (lbi, v, distdir) rf f = do+  componentsMap lbi v distdir $ \c clbi bi ->+         let+           outdir = componentOutDir lbi c+           opts = componentGhcOptions normal lbi bi clbi outdir++         in rf lbi v $ f opts++componentOptions :: (LocalBuildInfo, Verbosity, FilePath)+                 -> (GhcOptions -> GhcOptions)+                 -> IO [(ChComponentName, [String])]+componentOptions (lbi, v, distdir) f =+    componentOptions' (lbi, v, distdir) renderGhcOptions' f++gmModuleName :: C.ModuleName -> ChModuleName+gmModuleName = ChModuleName . intercalate "." . components+++initialBuildStepsForAllComponents+    :: FilePath+    -> PackageDescription+    -> LocalBuildInfo+    -> Verbosity+    -> IO ()+initialBuildStepsForAllComponents distdir pd lbi v =+  initialBuildSteps distdir pd lbi v++++#if !CH_MIN_VERSION_Cabal(1,25,0)+-- CPP < 1.25+unFlagName :: FlagName -> String+unFlagName (FlagName n) = n+-- mkFlagName n = FlagName n+#endif++toDataVersion :: Version -> DataVersion.Version+--fromDataVersion :: DataVersion.Version -> Version+#if CH_MIN_VERSION_Cabal(2,0,0)+toDataVersion v = DataVersion.Version (versionNumbers v) []+--fromDataVersion (DataVersion.Version vs _) = mkVersion vs+#else+toDataVersion = id+--fromDataVersion = id+#endif++++componentEntrypoints :: Component -> ChEntrypoint+componentEntrypoints (CLib Library {..})+    = ChLibEntrypoint+        (map gmModuleName exposedModules)+        (map gmModuleName $ otherModules libBuildInfo)+#if CH_MIN_VERSION_Cabal(2,0,0)+        (map gmModuleName signatures)+#else+        [] -- no signatures prior to Cabal 2.0+#endif+#if CH_MIN_VERSION_Cabal(2,0,0)+componentEntrypoints (CFLib (ForeignLib{..}))+    = ChLibEntrypoint+        []+        (map gmModuleName $ otherModules foreignLibBuildInfo)+        []+#endif+componentEntrypoints (CExe Executable {..})+    = ChExeEntrypoint+        modulePath+        (map gmModuleName $ otherModules buildInfo)+componentEntrypoints (CTest TestSuite { testInterface = TestSuiteExeV10 _ fp, ..})+    = ChExeEntrypoint fp (map gmModuleName $ otherModules testBuildInfo)+componentEntrypoints (CTest TestSuite { testInterface = TestSuiteLibV09 _ mn, ..})+    = ChLibEntrypoint [gmModuleName mn] (map gmModuleName $ otherModules testBuildInfo) []+componentEntrypoints (CTest TestSuite {})+    = ChLibEntrypoint [] [] []+componentEntrypoints (CBench Benchmark { benchmarkInterface = BenchmarkExeV10 _  fp, ..})+    = ChExeEntrypoint fp (map gmModuleName $ otherModules benchmarkBuildInfo)+componentEntrypoints (CBench Benchmark {})+    = ChLibEntrypoint [] [] []++renderGhcOptions' :: LocalBuildInfo+                  -> Verbosity+                  -> GhcOptions+                  -> IO [String]+#if !CH_MIN_VERSION_Cabal(1,20,0)+renderGhcOptions' lbi v opts = do+-- CPP < 1.20+  (ghcProg, _) <- requireProgram v ghcProgram (withPrograms lbi)+  let Just ghcVer = programVersion ghcProg+  return $ renderGhcOptions ghcVer opts+#elif CH_MIN_VERSION_Cabal(1,20,0) && !CH_MIN_VERSION_Cabal(1,24,0)+renderGhcOptions' lbi _v opts = do+-- CPP >= 1.20 && < 1.24+  return $ renderGhcOptions (compiler lbi) opts+#else+renderGhcOptions' lbi _v opts = do+-- CPP >= 1.24+  return $ renderGhcOptions (compiler lbi) (hostPlatform lbi) opts+#endif

@@ -1,841 +1,16 @@ -- cabal-helper: Simple interface to Cabal's configuration state--- Copyright (C) 2015-2018  Daniel Gröber <cabal-helper@dxld.at>+-- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at> ----- This program is free software: you can redistribute it and/or modify--- it under the terms of the GNU General Public License as published by--- the Free Software Foundation, either version 3 of the License, or--- (at your option) any later version.+-- SPDX-License-Identifier: Apache-2.0 ----- This program is distributed in the hope that it will be useful,--- but WITHOUT ANY WARRANTY; without even the implied warranty of--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the--- GNU General Public License for more details.+-- Licensed under the Apache License, Version 2.0 (the "License");+-- you may not use this file except in compliance with the License.+-- You may obtain a copy of the License at ----- You should have received a copy of the GNU General Public License--- along with this program.  If not, see <http://www.gnu.org/licenses/>.--{-# LANGUAGE CPP, BangPatterns, RecordWildCards, RankNTypes, ViewPatterns #-}--#ifdef MIN_VERSION_Cabal-#undef CH_MIN_VERSION_Cabal-#define CH_MIN_VERSION_Cabal MIN_VERSION_Cabal-#endif--import Distribution.Simple.Utils (cabalVersion)-import Distribution.Simple.Configure-import Distribution.Package-  ( PackageIdentifier-  , InstalledPackageId-  , PackageId-  , packageName-  , packageVersion-  )-import Distribution.PackageDescription-  ( PackageDescription-  , GenericPackageDescription(..)-  , Flag(..)-  , FlagName(..)-  , FlagAssignment-  , Executable(..)-  , Library(..)-  , TestSuite(..)-  , Benchmark(..)-  , BuildInfo(..)-  , TestSuiteInterface(..)-  , BenchmarkInterface(..)-  , withLib-  )-import Distribution.PackageDescription.Configuration-  ( flattenPackageDescription-  )-import Distribution.Simple.Program-  ( requireProgram-  , ghcProgram-  )-import Distribution.Simple.Program.Types-  ( ConfiguredProgram(..)-  )-import Distribution.Simple.Configure-  ( getPersistBuildConfig-  )-import Distribution.Simple.LocalBuildInfo-  ( LocalBuildInfo(..)-  , Component(..)-  , ComponentName(..)-  , ComponentLocalBuildInfo(..)-  , componentBuildInfo-  , externalPackageDeps-  , withComponentsLBI-  , withLibLBI-  , withExeLBI-  )-import Distribution.Simple.GHC-  ( componentGhcOptions-  )-import Distribution.Simple.Program.GHC-  ( GhcOptions(..)-  , renderGhcOptions-  )-import Distribution.Simple.Setup-  ( ConfigFlags(..)-  , Flag(..)-  , fromFlagOrDefault-  )-import Distribution.Simple.Build-  ( initialBuildSteps-  )-import Distribution.Simple.BuildPaths-  ( autogenModuleName-  , cppHeaderName-  )-import Distribution.Simple.Compiler-  ( PackageDB(..)-  , compilerId-  )-import Distribution.Compiler-  ( CompilerId(..)-  )-import Distribution.ModuleName-  ( components-  )-import qualified Distribution.ModuleName as C-  ( ModuleName-  )-import Distribution.Text-  ( display-  )-import Distribution.Verbosity-  ( Verbosity-  , silent-  , deafening-  , normal-  )-import Distribution.Version-  ( Version-  )--#if CH_MIN_VERSION_Cabal(1,22,0)--- CPP >= 1.22-import Distribution.Utils.NubList-#endif--#if CH_MIN_VERSION_Cabal(1,23,0)--- >= 1.23-import Distribution.Simple.LocalBuildInfo-  ( localUnitId-  )-#else--- <= 1.22-import Distribution.Simple.LocalBuildInfo-  ( inplacePackageId-  )-#endif--#if CH_MIN_VERSION_Cabal(1,25,0)--- >=1.25-import Distribution.PackageDescription-  ( unFlagName-  -- , mkFlagName-  )-import Distribution.Types.ForeignLib-  ( ForeignLib(..)-  )-import Distribution.Types.UnqualComponentName-  ( unUnqualComponentName-  )-#endif--#if CH_MIN_VERSION_Cabal(2,0,0)--- CPP >= 2.0-import Distribution.Simple.LocalBuildInfo-  ( allLibModules-  , componentBuildDir-  )-import Distribution.Simple.Register-  ( internalPackageDBPath-  )-import Distribution.Backpack-  ( OpenUnitId(..),-    OpenModule(..)-  )-import Distribution.ModuleName-  ( ModuleName-  )-import Distribution.Types.ComponentId-  ( unComponentId-  )-import Distribution.Types.ComponentLocalBuildInfo-  ( maybeComponentInstantiatedWith-  )-import Distribution.Types.ModuleRenaming-  ( ModuleRenaming(..),-    isDefaultRenaming-  )-import Distribution.Types.MungedPackageId-  ( MungedPackageId-  )-import Distribution.Types.UnitId-  ( UnitId-  , unDefUnitId-  , unUnitId-  )-import Distribution.Types.UnitId-  ( DefUnitId-  )-import Distribution.Utils.NubList-  ( toNubListR-  )-import Distribution.Version-  ( versionNumbers-  , mkVersion-  )-import qualified Distribution.InstalledPackageInfo as Installed-#endif--#if CH_MIN_VERSION_Cabal(2,2,0)-import Distribution.Types.GenericPackageDescription-  ( unFlagAssignment-  )-#endif+--     http://www.apache.org/licenses/LICENSE-2.0 -import Control.Applicative ((<$>))-import Control.Arrow (first, second, (&&&))-import Control.Monad-import Control.Exception (catch, PatternMatchFail(..))-import Data.List-import qualified Data.Map as Map-import Data.Maybe-import Data.Monoid-import Data.IORef-import qualified Data.Version as DataVersion+import CabalHelper.Runtime.HelperMain (helper_main) import System.Environment-import System.Directory-import System.FilePath-import System.Exit-import System.IO-import System.IO.Unsafe (unsafeInterleaveIO, unsafePerformIO)-import Text.Printf -import CabalHelper.Shared.Sandbox-import CabalHelper.Shared.Common-import CabalHelper.Shared.InterfaceTypes--usage :: IO ()-usage = do-  prog <- getProgName-  hPutStr stderr $ "Usage: " ++ prog ++ " " ++ usageMsg- where-   usageMsg = ""-     ++"PROJ_DIR DIST_DIR [--with-* ...] (\n"-     ++"    version\n"-     ++"  | print-lbi [--human]\n"-     ++"  | package-id\n"-     ++"  | flags\n"-     ++"  | config-flags\n"-     ++"  | non-default-config-flags\n"-     ++"  | write-autogen-files\n"-     ++"  | compiler-version\n"-     ++"  | ghc-options     [--with-inplace]\n"-     ++"  | ghc-src-options [--with-inplace]\n"-     ++"  | ghc-pkg-options [--with-inplace]\n"-     ++"  | ghc-merged-pkg-options [--with-inplace]\n"-     ++"  | ghc-lang-options [--with-inplace]\n"-     ++"  | package-db-stack\n"-     ++"  | entrypoints\n"-     ++"  | needs-build-output\n"-     ++"  | source-dirs\n"-     ++"  ) ...\n"--commands :: [String]-commands = [ "print-lbi"-           , "package-id"-           , "flags"-           , "config-flags"-           , "non-default-config-flags"-           , "write-autogen-files"-           , "compiler-version"-           , "ghc-options"-           , "ghc-src-options"-           , "ghc-pkg-options"-           , "ghc-lang-options"-           , "package-db-stack"-           , "entrypoints"-           , "needs-build-output"-           , "source-dirs"-           ]- main :: IO ()-main = do-  args <- getArgs--  projdir:distdir:args' <- case args of-                    [] -> usage >> exitFailure-                    _ -> return args--  ddexists <- doesDirectoryExist distdir-  when (not ddexists) $ do-         errMsg $ "distdir '"++distdir++"' does not exist"-         exitFailure--  [cfile] <- filter isCabalFile <$> getDirectoryContents projdir--  v <- maybe silent (const deafening) . lookup  "CABAL_HELPER_DEBUG" <$> getEnvironment-  lbi <- unsafeInterleaveIO $ getPersistBuildConfig distdir-  gpd <- unsafeInterleaveIO $ readPackageDescription v (projdir </> cfile)-  let pd = localPkgDescr lbi-  let lvd = (lbi, v, distdir)--  let-      -- a =<< b $$ c   ==  (a =<< b) $$ c-      infixr 2 $$-      ($$) = ($)--      collectCmdOptions :: [String] -> [[String]]-      collectCmdOptions =-          reverse . map reverse . foldl f [] . dropWhile isOpt-       where-         isOpt = ("--" `isPrefixOf`)-         f [] x = [[x]]-         f (a:as) x-             | isOpt x = (x:a):as-             | otherwise = [x]:(a:as)--  let cmds = collectCmdOptions args'--  if any (["version"] `isPrefixOf`) cmds-    then do-      putStrLn $-       printf "using version %s of the Cabal library" (display cabalVersion)-      exitSuccess-    else return ()--  print =<< flip mapM cmds $$ \x -> do-  case x of-    "flags":[] -> do-      return $ Just $ ChResponseFlags $ sort $-        map (flagName' &&& flagDefault) $ genPackageFlags gpd--    "config-flags":[] -> do-      return $ Just $ ChResponseFlags $ sort $-        map (first unFlagName)-#if CH_MIN_VERSION_Cabal(2,2,0)-          $ unFlagAssignment $ configConfigurationsFlags-#else-          $ configConfigurationsFlags-#endif-          $ configFlags lbi--    "non-default-config-flags":[] -> do-      let flagDefinitons = genPackageFlags gpd-          flagAssgnments =-#if CH_MIN_VERSION_Cabal(2,2,0)-            unFlagAssignment $ configConfigurationsFlags-#else-            configConfigurationsFlags-#endif-              $ configFlags lbi-          nonDefaultFlags =-              [ (flag_name, val)-              | MkFlag {flagName=(unFlagName -> flag_name'), flagDefault=def_val} <- flagDefinitons-              , (unFlagName -> flag_name, val) <- flagAssgnments-              , flag_name == flag_name'-              , val /= def_val-              ]-      return $ Just $ ChResponseFlags $ sort nonDefaultFlags--    "write-autogen-files":[] -> do-      initialBuildStepsForAllComponents distdir pd lbi v-      return Nothing--    "compiler-version":[] -> do-      let CompilerId comp ver = compilerId $ compiler lbi-      return $ Just $ ChResponseVersion (show comp) (toDataVersion ver)--    "ghc-options":flags -> do-      res <- componentOptions lvd True flags id-      return $ Just $ ChResponseCompList (res ++ [(ChSetupHsName, [])])--    "ghc-src-options":flags -> do-      res <- componentOptions lvd False flags $ \opts -> mempty {-               -- Not really needed but "unexpected package db stack: []"-               ghcOptPackageDBs      = [GlobalPackageDB, UserPackageDB],--               ghcOptCppOptions      = ghcOptCppOptions opts,-               ghcOptCppIncludePath  = ghcOptCppIncludePath opts,-               ghcOptCppIncludes     = ghcOptCppIncludes opts,-               ghcOptFfiIncludes     = ghcOptFfiIncludes opts,-               ghcOptSourcePathClear = ghcOptSourcePathClear opts,-               ghcOptSourcePath      = ghcOptSourcePath opts-              }-      return $ Just $ ChResponseCompList (res ++ [(ChSetupHsName, [])])--    "ghc-pkg-options":flags -> do-      res <- componentOptions lvd True flags $ \opts -> mempty {-                       ghcOptPackageDBs = ghcOptPackageDBs opts,-                       ghcOptPackages   = ghcOptPackages opts,-                       ghcOptHideAllPackages = ghcOptHideAllPackages opts-                   }-      return $ Just $ ChResponseCompList (res ++ [(ChSetupHsName, [])])--    "ghc-merged-pkg-options":flags -> do-      res <- mconcat . map snd <$> (componentOptions' lvd True flags (\_ _ o -> return o) $ \opts -> mempty {-                       ghcOptPackageDBs = [],-                       ghcOptHideAllPackages = NoFlag,-                       ghcOptPackages   = ghcOptPackages opts-                   })--      let res' = nubPackageFlags $ res { ghcOptPackageDBs = withPackageDB lbi-                                       , ghcOptHideAllPackages = Flag True-                                       }--      Just . ChResponseList <$> renderGhcOptions' lbi v res'--    "ghc-lang-options":flags -> do-      res <- componentOptions lvd False flags $ \opts -> mempty {-                       ghcOptPackageDBs      = [GlobalPackageDB, UserPackageDB],--                       ghcOptLanguage = ghcOptLanguage opts,-                       ghcOptExtensions = ghcOptExtensions opts,-                       ghcOptExtensionMap = ghcOptExtensionMap opts-                   }-      return $ Just $ ChResponseCompList (res ++ [(ChSetupHsName, [])])--    "package-db-stack":[] -> do-      let-          pkgDb GlobalPackageDB = ChPkgGlobal-          pkgDb UserPackageDB   = ChPkgUser-          pkgDb (SpecificPackageDB s) = ChPkgSpecific s--      -- TODO: Setup.hs has access to the sandbox as well: ghc-mod#478-      return $ Just $ ChResponsePkgDbs $ map pkgDb $ withPackageDB lbi--    "entrypoints":[] -> do-#if CH_MIN_VERSION_Cabal(2,0,0)-      includeDirMap <- recursiveDepInfo lbi v distdir-      eps <- componentsMap lbi v distdir $ \c clbi _bi -> do-               case needsBuildOutput includeDirMap (componentUnitId clbi) of-                 ProduceBuildOutput -> return $ componentEntrypoints c-                 NoBuildOutput -> return seps-                   where (_,_,seps) = recursiveIncludeDirs includeDirMap (componentUnitId clbi)-#else-      eps <- componentsMap lbi v distdir $ \c _clbi _bi ->-               return $ componentEntrypoints c-#endif-      -- MUST append Setup component at the end otherwise CabalHelper gets-      -- confused-      let eps' = eps ++ [(ChSetupHsName, ChSetupEntrypoint)]-      return $ Just $ ChResponseEntrypoints eps'--    "needs-build-output":[] -> do-#if CH_MIN_VERSION_Cabal(2,0,0)-      includeDirMap <- recursiveDepInfo lbi v distdir-      nbs <- componentsMap lbi v distdir $ \c clbi _bi ->-               return $ needsBuildOutput includeDirMap (componentUnitId clbi)-#else-      nbs <- componentsMap lbi v distdir $ \c _clbi _bi ->-               return $ NoBuildOutput-#endif-      return $ Just $ ChResponseNeedsBuild nbs--    "source-dirs":[] -> do-      res <- componentsMap lbi v distdir $$ \_ _ bi -> return $ hsSourceDirs bi-      return $ Just $ ChResponseCompList (res ++ [(ChSetupHsName, [])])--    "print-lbi":flags ->-      case flags of-        ["--human"] -> print lbi >> return Nothing-        []          -> return $ Just $ ChResponseLbi $ show lbi--    cmd:_ | not (cmd `elem` commands) ->-            errMsg ("Unknown command: " ++ cmd) >> usage >> exitFailure-    _ ->-            errMsg "Invalid usage!" >> usage >> exitFailure--flagName' = unFlagName . flagName---- getLibrary :: PackageDescription -> Library--- getLibrary pd = unsafePerformIO $ do---   lr <- newIORef (error "libraryMap: empty IORef")---   withLib pd (writeIORef lr)---   readIORef lr--getLibraryClbi pd lbi = unsafePerformIO $ do-  lr <- newIORef Nothing--  withLibLBI pd lbi $ \ lib clbi ->-      writeIORef lr $ Just (lib,clbi)--  readIORef lr---getExeClbi pd lbi = unsafePerformIO $ do-  lr <- newIORef Nothing--  withExeLBI pd lbi $ \ exe clbi ->-      writeIORef lr $ Just (exe,clbi)--  readIORef lr---componentsMap :: LocalBuildInfo-              -> Verbosity-              -> FilePath-              -> (   Component-                  -> ComponentLocalBuildInfo-                  -> BuildInfo-                  -> IO a)-              -> IO [(ChComponentName, a)]-componentsMap lbi _v _distdir f = do-    let pd = localPkgDescr lbi--    lr <- newIORef []--    -- withComponentsLBI is deprecated but also exists in very old versions-    -- it's equivalent to withAllComponentsInBuildOrder in newer versions-    withComponentsLBI pd lbi $ \c clbi -> do-        let bi = componentBuildInfo c-            name = componentNameFromComponent c--        l' <- readIORef lr-        r <- f c clbi bi-#if CH_MIN_VERSION_Cabal(2,0,0)-        writeIORef lr $ (componentNameToCh (unUnitId $ componentUnitId clbi) name, r):l'-#else-        writeIORef lr $ (componentNameToCh "" name, r):l'-#endif--    reverse <$> readIORef lr--componentOptions' (lbi, v, distdir) inplaceFlag flags rf f = do-  let pd = localPkgDescr lbi-#if CH_MIN_VERSION_Cabal(2,0,0)-  includeDirMap <- recursiveDepInfo lbi v distdir-#endif--  componentsMap lbi v distdir $ \c clbi bi ->-         let-           outdir = componentOutDir lbi c-           (clbi', adopts) = case flags of-                               _ | not inplaceFlag -> (clbi, mempty)-                               ["--with-inplace"] -> (clbi, mempty)-#if CH_MIN_VERSION_Cabal(2,0,0)-                               [] -> removeInplaceDeps v lbi pd clbi includeDirMap-#else-                               [] -> removeInplaceDeps v lbi pd clbi-#endif-           opts = componentGhcOptions normal lbi bi clbi' outdir-           opts' = f opts--         in rf lbi v $ nubPackageFlags $ opts' `mappend` adopts--componentOptions (lbi, v, distdir) inplaceFlag flags f =-    componentOptions' (lbi, v, distdir) inplaceFlag flags renderGhcOptions' f--gmModuleName :: C.ModuleName -> ChModuleName-gmModuleName = ChModuleName . intercalate "." . components--#if CH_MIN_VERSION_Cabal(2,0,0)-removeInplaceDeps :: Verbosity-                  -> LocalBuildInfo-                  -> PackageDescription-                  -> ComponentLocalBuildInfo-                  -> Map.Map UnitId SubDeps-                  -> (ComponentLocalBuildInfo, GhcOptions)-removeInplaceDeps _v lbi pd clbi includeDirs = let-    removeInplace c =-      let-        (ideps, incs) = partition (isInplaceCompInc c) (componentIncludes c)-        hasIdeps' = not $ null ideps-        c' = c { componentPackageDeps  = error "using deprecated field:componentPackageDeps"-               , componentInternalDeps = []-               , componentIncludes     = incs }-      in (hasIdeps',c')--    needsBuild = needsBuildOutput includeDirs (componentUnitId clbi)--    cleanRecursiveOpts :: Component-                       -> BuildInfo -> ComponentLocalBuildInfo -> GhcOptions-    cleanRecursiveOpts comp libbi libclbi =-      let-        liboutdir = componentOutDir lbi comp-        (_,libclbi') = removeInplace libclbi-        (extraIncludes,extraDeps',_ems) = recursiveIncludeDirs includeDirs (componentUnitId libclbi)-        (_,extraDeps) = partition (isInplaceCompInc libclbi) extraDeps'-        opts = (componentGhcOptions normal lbi libbi libclbi' liboutdir) {-                  ghcOptPackageDBs = []-               }--      in-        opts { ghcOptSourcePath = ghcOptSourcePath opts <> toNubListR extraIncludes-             , ghcOptPackages   = ghcOptPackages   opts <> toNubListR extraDeps }--    libopts =-      case (getLibraryClbi pd lbi,getExeClbi pd lbi) of-        (Just (lib, libclbi),_) | hasIdeps ->-          let-            libbi = libBuildInfo lib-            opts = cleanRecursiveOpts (CLib lib) libbi libclbi-          in-            opts { ghcOptInputModules = ghcOptInputModules opts <> (toNubListR $ allLibModules lib libclbi) }-        (_,Just (exe,execlbi)) | hasIdeps ->-          let-            exebi = buildInfo exe-          in-            cleanRecursiveOpts (CExe exe) exebi execlbi-        _ -> mempty--    distDir = fromFlagOrDefault ("." </> "dist") (configDistPref $ configFlags lbi)-    packageDbDir = internalPackageDBPath lbi distDir-    (hasIdeps,clbi') = case needsBuild of-                         NoBuildOutput -> removeInplace clbi-                         ProduceBuildOutput -> (False, clbi)-    libopts' = case needsBuild of-                 NoBuildOutput -> libopts-                 ProduceBuildOutput -> mempty { ghcOptPackageDBs = [SpecificPackageDB packageDbDir] }-  in (clbi', libopts')-#else-removeInplaceDeps :: Verbosity-                  -> LocalBuildInfo-                  -> PackageDescription-                  -> ComponentLocalBuildInfo-                  -> (ComponentLocalBuildInfo, GhcOptions)-removeInplaceDeps _v lbi pd clbi = let-    (ideps, deps) = partition (isInplaceDep lbi) (componentPackageDeps clbi)-    hasIdeps = not $ null ideps-    libopts =-      case getLibraryClbi pd lbi of-        Just (lib, libclbi) | hasIdeps ->-          let-            libbi = libBuildInfo lib-            liboutdir = componentOutDir lbi (CLib lib)-          in-            (componentGhcOptions normal lbi libbi libclbi liboutdir) {-                ghcOptPackageDBs = []-            }-        _ -> mempty-    clbi' = clbi { componentPackageDeps = deps }-  in (clbi', libopts)-#endif---#if CH_MIN_VERSION_Cabal(2,0,0)-recursiveDepInfo lbi v distdir = do-  includeDirs <- componentsMap lbi v distdir $ \c clbi bi -> do-    return (componentUnitId clbi-           , ( SubDeps-                { sdComponentInternalDeps = componentInternalDeps clbi-                , sdHsSourceDirs          = hsSourceDirs bi-                , sdComponentIncludes     = componentIncludes clbi-                , sdComponentEntryPoints  = componentEntrypoints c})  )-  return $ Map.fromList $ map snd includeDirs--data SubDeps = SubDeps-  { sdComponentInternalDeps :: [UnitId]-  , sdHsSourceDirs          :: [FilePath]-  , sdComponentIncludes     :: [(OpenUnitId, ModuleRenaming)]-  , sdComponentEntryPoints  :: ChEntrypoint-  }--recursiveIncludeDirs :: Map.Map UnitId SubDeps-                     -> UnitId -> ([FilePath], [(OpenUnitId, ModuleRenaming)]-                                  , ChEntrypoint)-recursiveIncludeDirs includeDirs unit = go ([],[],Nothing) [unit]-  where-    go (afp,aci,Nothing  ) [] = (afp,aci,error "recursiveIncludeDirs:no ChEntrypoint")-    go (afp,aci,Just amep) [] = (afp,aci,amep)-    go acc@(afp,aci,amep) (u:us) = case Map.lookup u includeDirs of-      Nothing -> go acc us-      Just (SubDeps us' sfp sci sep) -> go (afp++sfp,aci++sci,Just (combineEp amep sep)) (us++us')--needsBuildOutput :: Map.Map UnitId SubDeps -> UnitId -> NeedsBuildOutput-needsBuildOutput includeDirs unit = go [unit]-  where-    isIndef (IndefFullUnitId _ _) = True-    isIndef _                     = False-    go [] = NoBuildOutput-    go (u:us) = case Map.lookup u includeDirs of-      Nothing -> go us-      Just (SubDeps us' sfp sci sep) ->-        if any (isIndef . fst) sci-          then ProduceBuildOutput-          else go (us++us')---- | combineEP is used to combine the entrypoints when recursively chasing--- through the dependencies of a given entry point. The first parameter is the--- current accumulated value, and the second one is the current sub-dependency--- being considered. So the bias should be to preserve the type of entrypoint--- from the first parameter.-combineEp Nothing e = e-combineEp (Just ChSetupEntrypoint) e = e-combineEp (Just (ChLibEntrypoint es1 os1 ss1))   (ChLibEntrypoint es2 os2 ss2) = (ChLibEntrypoint (nub $ es2++es1) (nub $ os2++os1) (nub $ ss2++ss1))-combineEp _                                    e@(ChExeEntrypoint  mi os2)     = error $ "combineEP: cannot have a sub exe:" ++ show e-combineEp (Just (ChExeEntrypoint  mi os1))       (ChLibEntrypoint es2 os2 ss2) = (ChExeEntrypoint mi  (nub $ os1++es2++os2++ss2))---- no, you unconditionally always wrap the result in Just, so instead of `f x = Just y; f x = Just z` do `f x = y; f x = z` and use f as `Just . f`----instantiatedGhcPackage :: (ModuleName,OpenModule) -> [(OpenUnitId, ModuleRenaming)]-instantiatedGhcPackage (_,OpenModule oui@(DefiniteUnitId _) _) = [(oui,DefaultRenaming)]-instantiatedGhcPackage (_, _) = []-#endif--initialBuildStepsForAllComponents distdir pd lbi v =-  initialBuildSteps distdir pd lbi v-------#if !CH_MIN_VERSION_Cabal(1,25,0)--- CPP < 1.25-unFlagName (FlagName n) = n--- mkFlagName n = FlagName n-#endif--toDataVersion :: Version -> DataVersion.Version---fromDataVersion :: DataVersion.Version -> Version-#if CH_MIN_VERSION_Cabal(2,0,0)-toDataVersion v = DataVersion.Version (versionNumbers v) []---fromDataVersion (DataVersion.Version vs _) = mkVersion vs-#else-toDataVersion = id---fromDataVersion = id-#endif--componentNameToCh _uid CLibName = ChLibName-#if CH_MIN_VERSION_Cabal(1,25,0)--- CPP >= 1.25-#if CH_MIN_VERSION_Cabal(2,0,0)-componentNameToCh uid (CSubLibName n) = ChSubLibName uid-#else-componentNameToCh _uid (CSubLibName n) = ChSubLibName (unUnqualComponentName' n)-#endif-componentNameToCh uid (CFLibName   n) = ChFLibName (unUnqualComponentName' n)-#endif-componentNameToCh _uid (CExeName n) = ChExeName (unUnqualComponentName' n)-componentNameToCh _uid (CTestName n) = ChTestName (unUnqualComponentName' n)-componentNameToCh _uid (CBenchName n) = ChBenchName (unUnqualComponentName' n)--#if CH_MIN_VERSION_Cabal(1,25,0)--- CPP >= 1.25-unUnqualComponentName' = unUnqualComponentName-#else-unUnqualComponentName' = id-#endif--#if !CH_MIN_VERSION_Cabal(1,25,0)--- CPP < 1.25-componentNameFromComponent (CLib Library {}) = CLibName-#elif CH_MIN_VERSION_Cabal(1,25,0)--- CPP >= 1.25 (redundant)-componentNameFromComponent (CLib Library { libName = Nothing }) = CLibName-componentNameFromComponent (CLib Library { libName = Just n })  = CSubLibName n-componentNameFromComponent (CFLib ForeignLib {..}) = CFLibName foreignLibName-#endif-componentNameFromComponent (CExe Executable {..}) = CExeName exeName-componentNameFromComponent (CTest TestSuite {..}) = CTestName testName-componentNameFromComponent (CBench Benchmark {..}) = CBenchName benchmarkName--componentOutDir lbi (CLib Library {..})=-    buildDir lbi-#if CH_MIN_VERSION_Cabal(2,0,0)-componentOutDir lbi (CFLib ForeignLib {..}) =-    componentOutDir' lbi (unUnqualComponentName foreignLibName)-#endif-componentOutDir lbi (CExe Executable {..}) =-    componentOutDir' lbi (unUnqualComponentName' exeName)-componentOutDir lbi (CTest TestSuite { testInterface = TestSuiteExeV10 _ _, ..}) =-    componentOutDir' lbi (unUnqualComponentName' testName)-componentOutDir lbi (CTest TestSuite { testInterface = TestSuiteLibV09 _ _, ..}) =-    componentOutDir' lbi (unUnqualComponentName' testName ++ "Stub")-componentOutDir lbi (CBench Benchmark { benchmarkInterface = BenchmarkExeV10 _ _, ..})=-    componentOutDir' lbi (unUnqualComponentName' benchmarkName)--componentOutDir' :: LocalBuildInfo -> String -> FilePath-componentOutDir' lbi compName' =-  ----- Copied from Distribution/Simple/GHC.hs:buildOrReplExe-  let targetDir = (buildDir lbi) </> compName'-      compDir    = targetDir </> (compName' ++ "-tmp")-  in compDir--componentEntrypoints :: Component -> ChEntrypoint-componentEntrypoints (CLib Library {..})-    = ChLibEntrypoint-        (map gmModuleName exposedModules)-        (map gmModuleName $ otherModules libBuildInfo)-#if CH_MIN_VERSION_Cabal(2,0,0)-        (map gmModuleName signatures)-#else-        [] -- no signatures prior to Cabal 2.0-#endif-#if CH_MIN_VERSION_Cabal(2,0,0)-componentEntrypoints (CFLib (ForeignLib{..}))-    = ChLibEntrypoint-        []-        (map gmModuleName $ otherModules foreignLibBuildInfo)-        []-#endif-componentEntrypoints (CExe Executable {..})-    = ChExeEntrypoint-        modulePath-        (map gmModuleName $ otherModules buildInfo)-componentEntrypoints (CTest TestSuite { testInterface = TestSuiteExeV10 _ fp, ..})-    = ChExeEntrypoint fp (map gmModuleName $ otherModules testBuildInfo)-componentEntrypoints (CTest TestSuite { testInterface = TestSuiteLibV09 _ mn, ..})-    = ChLibEntrypoint [gmModuleName mn] (map gmModuleName $ otherModules testBuildInfo) []-componentEntrypoints (CTest TestSuite {})-    = ChLibEntrypoint [] [] []-componentEntrypoints (CBench Benchmark { benchmarkInterface = BenchmarkExeV10 _  fp, ..})-    = ChExeEntrypoint fp (map gmModuleName $ otherModules benchmarkBuildInfo)-componentEntrypoints (CBench Benchmark {})-    = ChLibEntrypoint [] [] []--#if CH_MIN_VERSION_Cabal(2,0,0)-isInplaceCompInc :: ComponentLocalBuildInfo -> (OpenUnitId, ModuleRenaming) -> Bool-isInplaceCompInc clbi (DefiniteUnitId uid, _mr)     = unDefUnitId uid `elem` componentInternalDeps clbi-isInplaceCompInc clbi (IndefFullUnitId uid _, _mmr) = False-#endif--#if CH_MIN_VERSION_Cabal(2,0,0)-isInplaceDep :: LocalBuildInfo -> ComponentLocalBuildInfo -> (UnitId, MungedPackageId) -> Bool-isInplaceDep lbi clbi (uid, _mpid) = uid `elem` componentInternalDeps clbi-#else-isInplaceDep :: LocalBuildInfo -> (InstalledPackageId, PackageId) -> Bool-#  if CH_MIN_VERSION_Cabal(1,23,0)--- CPP >= 1.23-isInplaceDep lbi (ipid, _pid) = localUnitId lbi == ipid-#  else--- CPP <= 1.22-isInplaceDep _lbi (ipid, pid) = inplacePackageId pid == ipid-#  endif-#endif--#if CH_MIN_VERSION_Cabal(1,22,0)--- CPP >= 1.22--- >= 1.22 uses NubListR-nubPackageFlags opts = opts-#else-nubPackageFlags opts = opts { ghcOptPackages = nub $ ghcOptPackages opts }-#endif--renderGhcOptions' :: LocalBuildInfo-                  -> Verbosity-                  -> GhcOptions-                  -> IO [String]-#if !CH_MIN_VERSION_Cabal(1,20,0)-renderGhcOptions' lbi v opts = do--- CPP < 1.20-  (ghcProg, _) <- requireProgram v ghcProgram (withPrograms lbi)-  let Just ghcVer = programVersion ghcProg-  return $ renderGhcOptions ghcVer opts-#elif CH_MIN_VERSION_Cabal(1,20,0) && !CH_MIN_VERSION_Cabal(1,24,0)-renderGhcOptions' lbi _v opts = do--- CPP >= 1.20 && < 1.24-  return $ renderGhcOptions (compiler lbi) opts-#else-renderGhcOptions' lbi _v opts = do--- CPP >= 1.24-  return $ renderGhcOptions (compiler lbi) (hostPlatform lbi) opts-#endif+main = getArgs >>= helper_main >>= print