56 lines
1.9 KiB
Haskell
56 lines
1.9 KiB
Haskell
|
-- ghc-mod: Making Haskell development *more* fun
|
||
|
|
-- Copyright (C) 2015 Nikolay Yakimov <root@livid.pp.ru>
|
||
|
|
--
|
||
|
|
-- This program is free software: you can redistribute it and/or modify
|
||
|
|
-- it under the terms of the GNU Affero General Public License as published by
|
||
|
|
-- the Free Software Foundation, either version 3 of the License, or
|
||
|
|
-- (at your option) any later version.
|
||
|
|
--
|
||
|
|
-- This program is distributed in the hope that it will be useful,
|
||
|
|
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
-- GNU Affero General Public License for more details.
|
||
|
|
--
|
||
|
|
-- You should have received a copy of the GNU Affero General Public License
|
||
|
|
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
module GHCMod.Options.ShellEscape (parseCmdLine) where
|
||
|
|
|
||
|
|
import Data.Char
|
||
|
|
import Data.Maybe
|
||
|
|
|
||
|
|
isQuote :: Char -> Bool
|
||
|
|
isQuote = (`elem` "\"'")
|
||
|
|
|
||
|
|
isEscapeChar :: Char -> Bool
|
||
|
|
isEscapeChar = (==) '\\'
|
||
|
|
|
||
|
|
isEscapable :: Char -> Bool
|
||
|
|
isEscapable c = any ($ c) [isSpace, isQuote, isEscapeChar]
|
||
|
|
|
||
|
|
go :: String -> String -> [String] -> Maybe Char -> [String]
|
||
|
|
-- result
|
||
|
|
go [] curarg accargs _ = reverse $ reverse curarg : accargs
|
||
|
|
-- escaped character
|
||
|
|
go (esc:c:cl) curarg accargs quote
|
||
|
|
| isEscapeChar esc
|
||
|
|
= if isEscapable c
|
||
|
|
then go cl (c:curarg) accargs quote
|
||
|
|
else go (c:cl) ('\\':curarg) accargs quote
|
||
|
|
-- quote character -- opens quotes
|
||
|
|
go (c:cl) curarg accargs Nothing
|
||
|
|
| isQuote c = go cl curarg accargs (Just c)
|
||
|
|
-- close quotes
|
||
|
|
go (c:cl) curarg accargs (Just q)
|
||
|
|
| c == q = go cl curarg accargs Nothing
|
||
|
|
go (c:cl) curarg accargs quotes
|
||
|
|
-- space separates argumetns outside quotes
|
||
|
|
| isSpace c && isNothing quotes
|
||
|
|
= if null curarg
|
||
|
|
then go cl curarg accargs quotes
|
||
|
|
else go cl [] (reverse curarg : accargs) quotes
|
||
|
|
-- general character
|
||
|
|
| otherwise = go cl (c:curarg) accargs quotes
|
||
|
|
|
||
|
|
parseCmdLine :: String -> [String]
|
||
|
|
parseCmdLine comline = go comline [] [] Nothing
|