bazel-runfiles (empty) → 0.7.0.0
raw patch · 5 files changed
+347/−0 lines, 5 filesdep +basedep +bazel-runfilesdep +directory
Dependencies added: base, bazel-runfiles, directory, filepath
Files
- LICENSE +201/−0
- README.md +19/−0
- bazel-runfiles.cabal +53/−0
- bin/Bin.hs +12/−0
- src/Bazel/Runfiles.hs +62/−0
+ LICENSE view
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+ README.md view
@@ -0,0 +1,19 @@+# Bazel Runfiles++This is a small utility to enable discovery of the Bazel runfiles location. This is useful in tests for example.++```haskell+module Main (main) where++import qualified Bazel.Runfiles as Runfiles+import Control.Monad (when)+import System.Process (callProcess)++main :: IO ()+main = do+ r <- Runfiles.create+ foo <- readFile (Runfiles.rlocation r "io_tweag_rules_haskell/tools/runfiles/test-data.txt")+ when (lines foo /= ["foo"]) -- ignore trailing newline+ $ error $ "Incorrect contents: got: " ++ show foo+ callProcess (Runfiles.rlocation r "io_tweag_rules_haskell/tools/runfiles/bin") []+```
+ bazel-runfiles.cabal view
@@ -0,0 +1,53 @@+-- This file has been generated from package.yaml by hpack version 0.28.2.+--+-- see: https://github.com/sol/hpack+--+-- hash: 2450630b07cf519c172182a5ebfcd5ba04c7f1358a6314f0cee822f222b31243++name: bazel-runfiles+version: 0.7.0.0+synopsis: Locate Bazel runfiles location+description: Please see the README on GitHub at <https://github.com/tweag/rules_haskell/tools/runfiles#readme>+category: Build Tool+homepage: https://github.com/tweag/rules_haskell#readme+bug-reports: https://github.com/tweag/rules_haskell/issues+author: Tweag I/O Limited+maintainer: m@tweag.io+copyright: 2018 Tweag I/O Limited+license: Apache-2.0+license-file: LICENSE+build-type: Simple+cabal-version: >= 1.10+extra-source-files:+ LICENSE+ README.md++source-repository head+ type: git+ location: https://github.com/tweag/rules_haskell++library+ exposed-modules:+ Bazel.Runfiles+ other-modules:+ Paths_bazel_runfiles+ hs-source-dirs:+ src+ build-depends:+ base >=4.7 && <5+ , directory+ , filepath+ default-language: Haskell2010++executable bazel-runfiles-exe+ main-is: Bin.hs+ other-modules:+ Paths_bazel_runfiles+ hs-source-dirs:+ bin+ ghc-options: -threaded -rtsopts -with-rtsopts=-N+ build-depends:+ base+ , bazel-runfiles+ , filepath+ default-language: Haskell2010
+ bin/Bin.hs view
@@ -0,0 +1,12 @@+module Main (main) where++import qualified Bazel.Runfiles as Runfiles+import Control.Monad (when)+import System.FilePath ((</>))++main :: IO ()+main = do+ r <- Runfiles.create+ bar <- readFile (Runfiles.rlocation r "io_tweag_rules_haskell/tools/runfiles/bin-data.txt")+ when (lines bar /= ["bar"]) -- ignore trailing newline+ $ error $ "Incorrect contents: got: " ++ show bar
+ src/Bazel/Runfiles.hs view
@@ -0,0 +1,62 @@+-- | This module enables finding data dependencies ("runfiles") of Haskell+-- binaries at runtime.+--+-- For more information, see: https://github.com/bazelbuild/bazel/issues/4460+--+-- Note: this does not currently support the RUNFILES_MANIFEST environmental+-- variable. However, that's only necessary on Windows, which rules_haskell+-- doesn't support yet.+--+-- Additionally, this is not yet supported by the REPL.+module Bazel.Runfiles+ ( Runfiles+ , create+ , rlocation+ , env+ ) where++import System.Directory (doesDirectoryExist)+import System.Environment (getExecutablePath, lookupEnv)+import System.FilePath (FilePath, (</>), (<.>))++-- | A path to a directory tree containing runfiles for the given+newtype Runfiles = Runfiles FilePath+ deriving Show++-- | Construct a path to a data dependency within the given runfiles.+--+-- For example: @rlocation \"myworkspace/mypackage/myfile.txt\"@+rlocation :: Runfiles -> FilePath -> FilePath+rlocation (Runfiles f) g = f </> g++-- | Set environmental variables for locating the given runfiles directory.+--+-- Note that Bazel will set these automatically when it runs tests+-- (@bazel test@). However, it will not automatically set them+-- during "bazel run"; thus, non-test binaries should set the+-- environment manually for processes that they call.+env :: Runfiles -> [(String, String)]+env (Runfiles f) = [(runfilesDirEnv, f)]++runfilesDirEnv :: String+runfilesDirEnv = "RUNFILES_DIR"++-- | Locate the runfiles directory for the current binary.+--+-- This behaves according to the specification in:+-- https://docs.google.com/document/d/e/2PACX-1vSDIrFnFvEYhKsCMdGdD40wZRBX3m3aZ5HhVj4CtHPmiXKDCxioTUbYsDydjKtFDAzER5eg7OjJWs3V/pub+--+-- Note: it does not currently support the @RUNFILES_MANIFEST@ environmental+-- variable. However, that's only necessary on Windows, which rules_haskell+-- doesn't support yet anyway.+create :: IO Runfiles+create = do+ exeRunfilesPath <- fmap (<.> "runfiles") getExecutablePath+ exeRunfilesExists <- doesDirectoryExist exeRunfilesPath+ if exeRunfilesExists+ then return $ Runfiles exeRunfilesPath+ else do+ envDir <- lookupEnv runfilesDirEnv+ case envDir of+ Just f -> return $ Runfiles f+ Nothing -> error "Unable to locate runfiles directory"