ghc-mod/GhcModExe/PkgDoc.hs

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module GhcModExe.PkgDoc (pkgDoc) where
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import Language.Haskell.GhcMod.Types
import Language.Haskell.GhcMod.GhcPkg
import Language.Haskell.GhcMod.Monad
import Language.Haskell.GhcMod.Output
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import Control.Applicative
import Prelude
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-- | Obtaining the package name and the doc path of a module.
pkgDoc :: IOish m => String -> GhcModT m String
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pkgDoc mdl = do
ghcPkg <- getGhcPkgProgram
readProc <- gmReadProcess
pkgDbStack <- getPackageDbStack
pkg <- liftIO $ trim <$> readProc ghcPkg (toModuleOpts pkgDbStack) ""
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if pkg == "" then
return "\n"
else do
htmlpath <- liftIO $ readProc ghcPkg (toDocDirOpts pkg pkgDbStack) ""
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let ret = pkg ++ " " ++ drop 14 htmlpath
return ret
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where
toModuleOpts dbs = ["find-module", mdl, "--simple-output"]
++ ghcPkgDbStackOpts dbs
toDocDirOpts pkg dbs = ["field", pkg, "haddock-html"]
++ ghcPkgDbStackOpts dbs
trim = takeWhile (`notElem` " \n")