git-annex/Git/Config.hs
Joey Hess 0d5c402210 Add annex-trustlevel configuration settings, which can be used to override the trust level of a remote.
This overrides the trust.log, and is overridden by the command-line trust
parameters.

It would have been nicer to have Logs.Trust.trustMap just look up the
configuration for all remotes, but a dependency loop prevented that
(Remotes depends on Logs.Trust in several ways). So instead, look up
the configuration when building remotes, storing it in the same forcetrust
field used for the command-line trust parameters.
2012-01-09 23:31:44 -04:00

70 lines
2.2 KiB
Haskell

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