72 lines
2.3 KiB
Haskell
72 lines
2.3 KiB
Haskell
{- git repository configuration handling
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-
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- Copyright 2010,2011 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Git.Config where
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import System.Posix.Directory
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import Control.Exception (bracket_)
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import qualified Data.Map as M
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import Common
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import Git
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import Git.Types
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import qualified Git.Construct
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{- Returns a single git config setting, or a default value if not set. -}
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get :: String -> String -> Repo -> String
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get key defaultValue repo = M.findWithDefault defaultValue key (config repo)
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{- Returns a single git config setting, if set. -}
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getMaybe :: String -> Repo -> Maybe String
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getMaybe key repo = M.lookup key (config repo)
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{- Runs git config and populates a repo with its config. -}
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read :: Repo -> IO Repo
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read repo@(Repo { location = Dir d }) = bracketcd d $
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{- Cannot use pipeRead because it relies on the config having
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been already read. Instead, chdir to the repo. -}
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pOpen ReadFromPipe "git" ["config", "--null", "--list"] $ hRead repo
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where
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bracketcd to a = bracketcd' to a =<< getCurrentDirectory
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bracketcd' to a cwd
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| dirContains to cwd = a
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| otherwise = bracket_ (changeWorkingDirectory to) (changeWorkingDirectory cwd) a
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read r = assertLocal r $
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error $ "internal error; trying to read config of " ++ show r
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{- Reads git config from a handle and populates a repo with it. -}
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hRead :: Repo -> Handle -> IO Repo
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hRead repo h = do
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val <- hGetContentsStrict h
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store val repo
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{- Stores a git config into a repo, returning the new version of the repo.
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- The git config may be multiple lines, or a single line. Config settings
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- can be updated inrementally. -}
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store :: String -> Repo -> IO Repo
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store s repo = do
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let c = parse s
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let repo' = repo
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{ config = (M.map Prelude.head c) `M.union` config repo
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, fullconfig = M.unionWith (++) c (fullconfig repo)
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}
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rs <- Git.Construct.fromRemotes repo'
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return $ repo' { remotes = rs }
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{- Parses git config --list or git config --null --list output into a
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- config map. -}
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parse :: String -> M.Map String [String]
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parse [] = M.empty
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parse s
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-- --list output will have an = in the first line
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| all ('=' `elem`) (take 1 ls) = sep '=' ls
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-- --null --list output separates keys from values with newlines
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| otherwise = sep '\n' $ split "\0" s
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where
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ls = lines s
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sep c = M.fromListWith (++) . map (\(k,v) -> (k, [v])) .
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map (separate (== c))
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