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b1b3c4c469
With XDG support so firmly ingrained now, it's about time we stop hard-coding the configuration path in the docs.
104 lines
3.1 KiB
Haskell
104 lines
3.1 KiB
Haskell
-----------------------------------------------------------------------------
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-- |
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-- Module : XMonad.Prompt.Man
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-- Description : A manual page prompt.
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-- Copyright : (c) 2007 Valery V. Vorotyntsev
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-- License : BSD3-style (see LICENSE)
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--
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-- Maintainer : Valery V. Vorotyntsev <valery.vv@gmail.com>
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-- Portability : non-portable (uses "manpath" and "bash")
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--
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-- A manual page prompt for XMonad window manager.
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--
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-- TODO
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--
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-- * narrow completions by section number, if the one is specified
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-- (like @\/etc\/bash_completion@ does)
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-----------------------------------------------------------------------------
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module XMonad.Prompt.Man (
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-- * Usage
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-- $usage
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manPrompt
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, getCommandOutput
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, Man
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) where
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import XMonad
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import XMonad.Prelude
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import XMonad.Prompt
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import XMonad.Util.Run
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import XMonad.Prompt.Shell (split)
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import System.Directory
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import System.FilePath (dropExtensions, (</>))
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import System.IO
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import System.Process
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import qualified Control.Exception as E
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-- $usage
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-- 1. In your @xmonad.hs@:
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--
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-- > import XMonad.Prompt
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-- > import XMonad.Prompt.Man
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--
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-- 2. In your keybindings add something like:
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--
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-- > , ((modm, xK_F1), manPrompt def)
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--
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-- For detailed instruction on editing the key binding see
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-- <https://xmonad.org/TUTORIAL.html#customizing-xmonad the tutorial>.
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data Man = Man
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instance XPrompt Man where
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showXPrompt Man = "Manual page: "
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-- | Query for manual page to be displayed.
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manPrompt :: XPConfig -> X ()
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manPrompt c = do
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mans <- io getMans
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mkXPrompt Man c (manCompl c mans) $ runInTerm "" . (++) "man "
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getMans :: IO [String]
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getMans = do
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paths <- do
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let getout cmd = getCommandOutput cmd `E.catch` \E.SomeException{} -> return ""
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-- one of these combinations should give some output
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p1 <- getout "manpath -g 2>/dev/null"
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p2 <- getout "manpath 2>/dev/null"
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return $ intercalate ":" $ lines $ p1 ++ p2
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let sects = ["man" ++ show n | n <- [1..9 :: Int]]
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dirs = [d </> s | d <- split ':' paths, s <- sects]
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mans <- forM (nub dirs) $ \d -> do
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exists <- doesDirectoryExist d
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if exists
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then map dropExtensions <$> getDirectoryContents d
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else return []
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return $ uniqSort $ concat mans
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manCompl :: XPConfig -> [String] -> String -> IO [String]
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manCompl c mans s | s == "" || last s == ' ' = return []
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| otherwise = do
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-- XXX readline instead of bash's compgen?
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f <- lines <$> getCommandOutput ("bash -c 'compgen -A file " ++ s ++ "'")
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mkComplFunFromList c (f ++ mans) s
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-- | Run a command using shell and return its output.
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--
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-- XXX Merge into "XMonad.Util.Run"?
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--
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-- (Ask \"gurus\" whether @evaluate (length ...)@ approach is
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-- better\/more idiomatic.)
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getCommandOutput :: String -> IO String
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getCommandOutput s = do
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-- we can ignore the process handle because we ignor SIGCHLD
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(pin, pout, perr, _) <- runInteractiveCommand s
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hClose pin
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output <- hGetContents pout
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E.evaluate (length output)
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hClose perr
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return output
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