hspec-stack-rerun (empty) → 0.1.0.0

raw patch · 4 files changed

+118/−0 lines, 4 filesdep +basedep +directorydep +hspecsetup-changed

Dependencies added: base, directory, hspec, safe, strict

Files

LICENSE +30/−0
Setup.hs +2/−0
hspec-stack-rerun.cabal +19/−0
src/Rerun.hs +67/−0

+ LICENSE view

@@ -0,0 +1,30 @@+Copyright Mark Wotton (c) 2016++All rights reserved.++Redistribution and use in source and binary forms, with or without+modification, are permitted provided that the following conditions are met:++    * Redistributions of source code must retain the above copyright+      notice, this list of conditions and the following disclaimer.++    * Redistributions in binary form must reproduce the above+      copyright notice, this list of conditions and the following+      disclaimer in the documentation and/or other materials provided+      with the distribution.++    * Neither the name of Mark Wotton nor the names of other+      contributors may be used to endorse or promote products derived+      from this software without specific prior written permission.++THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+ Setup.hs view

@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain

+ hspec-stack-rerun.cabal view

@@ -0,0 +1,19 @@+name:                hspec-stack-rerun+version:             0.1.0.0+synopsis:            Simple project template from stack+description:         Please see README.md+homepage:            https://github.com/mwotton/hspec-stack-rerun#readme+license:             BSD3+license-file:        LICENSE+author:              Mark Wotton+maintainer:          mwotton@gmail.com+copyright:           AllRightsReserved+category:            Web+build-type:          Simple+cabal-version:       >=1.10++library+  hs-source-dirs:      src+  default-language:    Haskell2010+  build-depends:       base >= 4.7 && < 5, hspec, strict, directory, safe+  exposed-modules:     Rerun

+ src/Rerun.hs view

@@ -0,0 +1,67 @@+{-# LANGUAGE ScopedTypeVariables #-}+module Rerun where++import Test.Hspec.Runner+import Control.Exception+import Prelude+import System.Environment+import System.IO.Strict+import System.IO(withFile,IOMode(ReadMode))+import System.Directory(removeFile)+import Safe (lastMay)+import Control.Monad(when)++-- | We wrap this so that we can stash HSPEC_FAILURES in a file (which+--   comes from HSPEC_FAILURES_FILE).++main clientSpec = do+  stashFile <- lookupEnv "HSPEC_FAILURES_FILE"+  alreadySet <- lookupEnv "HSPEC_FAILURES"+  print ("startup", stashFile, alreadySet)+  case (stashFile,alreadySet) of+    (Just stash,Just failures) -> do+      -- if there's no stash set, we might as well write it so+      -- we have a starting point. it might get overwritten later,+      -- that's fine+      print ("writing stash optimistically", failures)+      writeFile stash failures+    (Just stash,Nothing) -> do+      print ("reading", stash)+      f <- safeReadFile stash+      print ("read", stash)+      case f of+        Nothing -> print ("couldn't read stash", stash)+        -- this should read all of contents, thereby closing the+        -- filehandle. Lazy IO is the devil.+        Just contents ->  do+          when (contents /= "") $ do+            print ("read stash, setting env", contents)+            setEnv "HSPEC_FAILURES" contents+    _ -> return ()+  clientSpec `finally` do+    print "done with tests!"+    -- we don't remove the file until now, so that if ghcid gets+    -- interrupted, we still have the failures to run first.+    -- small race condition, obviously, but the worst case is that+    -- we run more tests than we should.+    case stashFile of+      Just stash -> logAndIgnore () $ removeFile stash+      Nothing -> return ()++    newSet <- lookupEnv "HSPEC_FAILURES"+    print ("spec failures", newSet,stashFile,alreadySet)+    case (stashFile,alreadySet,newSet) of+      -- only care if there is a stash file, the var wasn't set before,+      -- and there is a new value: here, we write the file+      (Just stash,Nothing,Just newset) ->+        writeFile stash newset+      _ -> return ()++-- LAZY IO IS THE DEVIL+safeReadFile :: FilePath -> IO (Maybe String)+safeReadFile fs = logAndIgnore Nothing $ do+  f <- withFile fs ReadMode (\h -> hGetContents h >>= \x -> seq (lastMay x) (return x))+  print ("saferead got", f)+  return (Just f)++logAndIgnore def f  =   handle (\(e::IOException) -> print ("saferead failed", e) >> return def) f