git-annex/Command/Help.hs

{- git-annex command
 -
 - Copyright 2012 Joey Hess <joey@kitenet.net>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

module Command.Help where

import Common.Annex
import Command
import qualified Command.Init
import qualified Command.Add
import qualified Command.Drop
import qualified Command.Get
import qualified Command.Move
import qualified Command.Copy
import qualified Command.Sync
import qualified Command.Whereis
import qualified Command.Fsck
import GitAnnex.Options

import System.Console.GetOpt

def :: [Command]
def = [noCommit $ noRepo showGeneralHelp $ dontCheck repoExists $
	command "help" paramNothing seek SectionQuery "display help"]

seek :: [CommandSeek]
seek = [withWords start]

start :: [String] -> CommandStart
start ["options"] = do
	liftIO showCommonOptions
	stop
start _ = do
	liftIO showGeneralHelp
	stop

showCommonOptions :: IO ()
showCommonOptions = putStrLn $ usageInfo "Common options:" options

showGeneralHelp :: IO ()
showGeneralHelp = putStrLn $ unlines
	[ "The most frequently used git-annex commands are:"
	, unlines $ map cmdline $ concat
		[ Command.Init.def
		, Command.Add.def
		, Command.Drop.def
		, Command.Get.def
		, Command.Move.def
		, Command.Copy.def
		, Command.Sync.def
		, Command.Whereis.def
		, Command.Fsck.def
		]
	, "Run 'git-annex' for a complete command list."
	, "Run 'git-annex command --help' for help on a specific command."
	, "Run `git annex help options' for a list of common options."
	]
  where
	cmdline c = "\t" ++ cmdname c ++ "\t" ++ cmddesc c