Fix ifBuildable

[ghc-hetmet.git] / libraries / ifBuildable.hs

diff --git a/libraries/ifBuildable.hs b/libraries/ifBuildable.hs
index 3f8813b..7364a11 100644 (file)
--- a/libraries/ifBuildable.hs
+++ b/libraries/ifBuildable.hs
@@ -12,25 +12,29 @@ import System.IO
 main :: IO ()
 main = do args <- getArgs
           case args of
-              [bootPackagesFile, package] ->
-                  doit bootPackagesFile package
+              [packagesFile, package] ->
+                  doit packagesFile package
               _ ->
-                  error "Syntax: ifBuildable <boot-packages-file> <package>"
+                  error "Syntax: ifBuildable <packages-file> <package>"
 
 doit :: FilePath -> String -> IO ()
-doit bootPackagesFile package
+doit packagesFile package
  = do setCurrentDirectory package
       unbuildable <- doesFileExist "unbuildable"
       if not unbuildable
          then exitWith ExitSuccess
-         else do mustBeBuildables <- getMustBeBuildables bootPackagesFile
+         else do mustBeBuildables <- getMustBeBuildables packagesFile
                  if package `elem` mustBeBuildables
                      then exitWith ExitSuccess
                      else do hPutStrLn stderr "Warning: Package is unbuildable"
                              exitWith (ExitFailure 1)
 
 getMustBeBuildables :: FilePath -> IO [String]
-getMustBeBuildables bootPackagesFile
- = do xs <- readFile bootPackagesFile
-      return $ filter ("editline" /=) $ lines xs
+getMustBeBuildables packagesFile
+ = do xs <- readFile packagesFile
+      let nonCommentLines = filter (("#" /=) . take 1) $ lines xs
+          requiredLines = filter ((2 == ) . length) $ map words nonCommentLines
+          requiredLibraries = [ x | 'l':'i':'b':'r':'a':'r':'i':'e':'s':'/':x
+                                    <- map head requiredLines ]
+      return $ filter ("editline" /=) requiredLibraries