Account for cpp-options and ghc-options

CHANGES.markdown

@@ -1,6 +1,7 @@
 # 0.3.1
  * Dropped support for GHC 8.2
- * Add `--ghc-arg` as a command line argument, allowing users to pass additional arguments to GHC used to parse Haddock.
+ * Add `--ghc-arg` as a command line argument, allowing users to pass additional arguments to GHC used to parse Haddock. ([#71](https://github.com/martijnbastiaan/doctest-parallel/issues/71))
+ * CPP options and GHC options (Cabal fields: `cpp-options` and `ghc-options`) are now passed to GHC when parsing source files ([#71](https://github.com/martijnbastiaan/doctest-parallel/issues/71))
 
 # 0.3.0.1
  * Add support for GHC 9.6

doctest-parallel.cabal

@@ -184,6 +184,7 @@ test-suite spectests
       MainSpec
       OptionsSpec
       ParseSpec
+      ProjectsSpec
       PropertySpec
       Runner.ExampleSpec
       RunnerSpec

src/Test/DocTest/Helpers.hs

@@ -29,7 +29,8 @@ import Distribution.Types.UnqualComponentName ( unUnqualComponentName )
 import Distribution.PackageDescription
   ( GenericPackageDescription (condLibrary)
   , exposedModules, libBuildInfo, hsSourceDirs, defaultExtensions, package
-  , packageDescription, condSubLibraries, includeDirs, autogenModules, ConfVar(..) )
+  , packageDescription, condSubLibraries, includeDirs, autogenModules
+  , ConfVar(..), BuildInfo (cppOptions), hcOptions )
 
 import Distribution.Compiler (CompilerFlavor(GHC))
 import Distribution.Pretty (prettyShow)
@@ -69,6 +70,8 @@ data Library = Library
     -- ^ Exposed modules
   , libDefaultExtensions :: [Extension]
     -- ^ Extensions enabled by default
+  , libFlags :: [String]
+    -- ^ Flags found in 'cpp-options' and 'gcc-options'
   }
   deriving (Show)
 
@@ -79,6 +82,7 @@ mergeLibraries libs = Library
   , libCSourceDirectories = concatMap libCSourceDirectories libs
   , libModules = concatMap libModules libs
   , libDefaultExtensions = concatMap libDefaultExtensions libs
+  , libFlags = concatMap libFlags libs
   }
 
 -- | Convert a "Library" to arguments suitable to be passed to GHCi.
@@ -88,7 +92,7 @@ libraryToGhciArgs Library{..} = (hsSrcArgs <> cSrcArgs, modArgs, extArgs)
   hsSrcArgs = map ("-i" <>) libSourceDirectories
   cSrcArgs = map ("-I" <>) libCSourceDirectories
   modArgs = map prettyShow libModules
-  extArgs = map showExt libDefaultExtensions
+  extArgs = map showExt libDefaultExtensions <> libFlags
 
   showExt = \case
     EnableExtension ext -> "-X" <> show ext
@@ -230,6 +234,7 @@ extractSpecificCabalLibrary maybeLibName pkgPath = do
     , libCSourceDirectories = map (root </>) cSourceDirs
     , libModules = exposedModules lib `rmList` autogenModules buildInfo
     , libDefaultExtensions = defaultExtensions buildInfo
+    , libFlags = cppOptions buildInfo <> hcOptions GHC buildInfo
     }
    where
     buildInfo = libBuildInfo lib

test/ProjectsSpec.hs

@@ -0,0 +1,49 @@
+module ProjectsSpec where
+
+import qualified Test.Hspec
+import Test.Hspec hiding (it)
+import Test.HUnit
+
+import Data.List (isInfixOf)
+import Data.Maybe
+import System.Environment
+import System.Exit
+import System.FilePath
+import System.IO.Unsafe
+import System.Process
+import Text.Printf
+
+main :: IO ()
+main = hspec spec
+
+type LibName = String
+type NumberOfTestsExpected = Word
+
+-- | Run 'cabal run doctests' in a project in projects/, expect a number of
+-- succeeded tests.
+runProject :: LibName -> NumberOfTestsExpected -> Assertion
+runProject libName nTests = do
+  (exitCode, _stdout, stderr) <- readCreateProcessWithExitCode process ""
+  assertEqual ("'cabal run doctests' succeeded for " <> libName) exitCode ExitSuccess
+  assertBool ("expected\n\n" <> expect <> "\n\nin\n\n" <> stderr) (expect `isInfixOf` stderr)
+ where
+  expect = printf "Examples: %d  Tried: %d  Errors: 0  Unexpected output: 0" nTests nTests
+  process = (proc "cabal" ["run", "doctests"])
+    { cwd = Just ("test" </> "projects" </> "cpp-options")
+    }
+
+-- | 'it' or 'xit', depending on whether we run in a Nix/Stack context. Nix
+-- doesn't have Cabal available, so the tests will fail. This is mostly a
+-- workaround for CI.
+ignoreIfNixOrStack :: Example a => String -> a -> SpecWith (Arg a)
+ignoreIfNixOrStack = unsafePerformIO $ do
+  stack <- fmap isJust (lookupEnv "STACK_EXE")
+  nix <- fmap isJust (lookupEnv "NIX_BUILD_TOP")
+  if stack || nix
+  then pure Test.Hspec.xit
+  else pure Test.Hspec.it
+
+
+spec :: Spec
+spec = do
+  ignoreIfNixOrStack "cpp-projects" (runProject "cpp-options" 1)

test/Spec.hs

@@ -9,6 +9,7 @@ import qualified LocationSpec
 import qualified MainSpec
 import qualified OptionsSpec
 import qualified ParseSpec
+import qualified ProjectsSpec
 import qualified PropertySpec
 import qualified RunnerSpec
 import qualified RunSpec
@@ -26,6 +27,7 @@ spec = do
   describe "MainSpec"        MainSpec.spec
   describe "OptionsSpec"     OptionsSpec.spec
   describe "ParseSpec"       ParseSpec.spec
+  describe "ProjectsSpec"    ProjectsSpec.spec
   describe "PropertySpec"    PropertySpec.spec
   describe "RunnerSpec"      RunnerSpec.spec
   describe "RunSpec"         RunSpec.spec

test/projects/cpp-options/cabal.project

@@ -0,0 +1,6 @@
+packages:
+  .
+  ../../..
+
+write-ghc-environment-files: always
+

test/projects/cpp-options/cpp-options.cabal

@@ -0,0 +1,23 @@
+cabal-version:      2.0
+name:               cpp-options
+version:            0.1.0.0
+license:            MIT
+author:             Martijn Bastiaan
+maintainer:         [email protected]
+build-type:         Simple
+
+library
+    exposed-modules:  MyLib
+    ghc-options:      -Wall
+    cpp-options:      -DADD=add
+    build-depends:    base
+    hs-source-dirs:   src
+    default-language: Haskell2010
+
+test-suite doctests
+  type:             exitcode-stdio-1.0
+  hs-source-dirs:   test
+  main-is:          doctests.hs
+  ghc-options:      -threaded
+  build-depends:    base, cpp-options, doctest-parallel >= 0.1
+  default-language: Haskell2010

test/projects/cpp-options/src/MyLib.hs

@@ -0,0 +1,13 @@
+{-# LANGUAGE CPP #-}
+
+module MyLib (add, main) where
+
+-- | Adds two 'Int's
+--
+-- >>> ADD 3 5
+-- 8
+add :: Int -> Int -> Int
+add = (+)
+
+main :: IO ()
+main = print (ADD 3 5)

test/projects/cpp-options/test/doctests.hs

@@ -0,0 +1,7 @@
+module Main where
+
+import Test.DocTest (mainFromCabal)
+import System.Environment (getArgs)
+
+main :: IO ()
+main = mainFromCabal "cpp-options" =<< getArgs