Moved man page creation out of Setup.hs.

* MakeManPage.hs has been transformed into
  man/make-pandoc-man-pages.hs.
* There is now a cabal stanza for this, so the dependencies are
  handled by cabal.
* Special treatment in Setup.hs ensures that this never gets installed;
  it is built and used to create the man pages.
* Setup.hs cleaned up.

1 files changed, 14 insertions, 56 deletions

diff --git a/Setup.hs b/Setup.hs
index 324142a30..4c50ec209 100644
--- a/Setup.hs
+++ b/Setup.hs
@@ -3,26 +3,16 @@
 import Distribution.Simple
 import Distribution.Simple.Setup
          (copyDest, copyVerbosity, fromFlag, installVerbosity, BuildFlags(..))
-import Distribution.PackageDescription
-         (PackageDescription(..), Executable(..), BuildInfo(..))
+import Distribution.PackageDescription (PackageDescription(..), Executable(..))
 import Distribution.Simple.LocalBuildInfo
          (LocalBuildInfo(..), absoluteInstallDirs)
 import Distribution.Verbosity ( Verbosity, silent )
-import Distribution.Simple.GHC (ghcPackageDbOptions)
-import Distribution.Simple.InstallDirs (mandir, bindir, CopyDest (NoCopyDest))
+import Distribution.Simple.InstallDirs (mandir, CopyDest (NoCopyDest))
 import Distribution.Simple.Utils (installOrdinaryFiles)
 import Prelude hiding (catch)
-import Control.Exception ( bracket_, catch )
-import Control.Monad ( unless )
-import System.Process ( rawSystem, runCommand, waitForProcess )
+import System.Process ( rawSystem )
 import System.FilePath ( (</>) )
-import System.Directory
 import System.Exit
-import System.Time
-import System.IO.Error ( isDoesNotExistError )
-import Data.Maybe ( catMaybes )
-import Data.List ( (\\) )
-import Data.Time.Clock (UTCTime(..))
 
 main :: IO ()
 main = do
@@ -33,39 +23,22 @@ main = do
               (fromFlag $ copyDest flags)
     , postInst = \ _ flags pkg lbi ->
          installManpages pkg lbi (fromFlag $ installVerbosity flags) NoCopyDest
+    , copyHook = \pkgdescr ->
+         (copyHook simpleUserHooks) pkgdescr{ executables =
+            [x | x <- executables pkgdescr, exeName x /= "make-pandoc-man-pages"] }
+    , instHook = \pkgdescr ->
+         (instHook simpleUserHooks) pkgdescr{ executables =
+            [x | x <- executables pkgdescr, exeName x /= "make-pandoc-man-pages"] }
     }
   exitWith ExitSuccess
 
 -- | Build man pages from markdown sources in man/
 makeManPages :: Args -> BuildFlags -> PackageDescription -> LocalBuildInfo -> IO ()
-makeManPages _ flags _ lbi = do
-  ds1 <- modifiedDependencies (manDir </> "man1" </> "pandoc.1")
-    ["README", manDir </> "man1" </> "pandoc.1.template"]
-  ds2 <- modifiedDependencies (manDir </> "man5" </> "pandoc_markdown.5")
-    ["README", manDir </> "man5" </> "pandoc_markdown.5.template"]
-
-  let distPref  = fromFlag (buildDistPref flags)
-      packageDB =
-          withPackageDB lbi
-           ++ [SpecificPackageDB $ distPref </> "package.conf.inplace"]
-
-      verbosity = fromFlag $ buildVerbosity flags
-
-      args = makeGhcArgs (ghcPackageDbOptions packageDB)
-             ++ ["MakeManPage.hs"]
-      args' = if verbosity == silent
-                then args
-                else args ++ ["--verbose"]
-  -- Don't run MakeManPage.hs unless we have to
-  unless (null ds1 && null ds2) $ do
-    rawSystem "runghc" args' >>= exitWith
-
--- format arguments to runghc that we wish to pass to ghc
--- normally runghc gets it right, unless the argument does
--- not begin with a '-' charecter, so we need to give clear
--- directions.
-makeGhcArgs :: [String] -> [String]
-makeGhcArgs = map ("--ghc-arg="++)
+makeManPages _ flags _ _ = do
+  let verbosity = fromFlag $ buildVerbosity flags
+  let args = ["--verbose" | verbosity /= silent]
+  rawSystem ("dist" </> "build" </> "make-pandoc-man-pages" </> "make-pandoc-man-pages")
+      args >>= exitWith
 
 manpages :: [FilePath]
 manpages = ["man1" </> "pandoc.1"
@@ -80,18 +53,3 @@ installManpages pkg lbi verbosity copy =
   installOrdinaryFiles verbosity (mandir (absoluteInstallDirs pkg lbi copy))
              (zip (repeat manDir) manpages)
 
--- | Returns a list of 'dependencies' that have been modified after 'file'.
-modifiedDependencies :: FilePath -> [FilePath] -> IO [FilePath]
-modifiedDependencies file dependencies = do
-  fileModTime <- catch (getModificationTime file) $
-                 \e -> if isDoesNotExistError e
-#if __GLASGOW_HASKELL__ >= 706
-                          then return (UTCTime (toEnum 0) 0)   -- the minimum ClockTime
-#else
-                          then return (TOD 0 0)   -- the minimum ClockTime
-#endif
-                          else ioError e
-  depModTimes <- mapM getModificationTime dependencies
-  let modified = zipWith (\dep time -> if time > fileModTime then Just dep else Nothing) dependencies depModTimes
-  return $ catMaybes modified
-