git-annex/Command/PreCommit.hs
Joey Hess d0fce426c4 pre-commit-annex hook script to automatically extract metadata from lots of types of files
Using the extract(1) program to do the heavy lifting.

Decided to make git-annex run pre-commit-annex when committing. Since
git-annex pre-commit also runs it, it'll be run when git commit is run too,
via the pre-commit hook. This basically gives back the pre-commit hook
that git-annex took away. The implementation avoids repeatedly looking
for the hook script when the assistant is running and committing
repeatedly; only checks if the hook is available once.

To make the script simpler, made git-annex metadata -s field?=value
only set a field when it's not already got a value.

This commit was sponsored by bak.
2014-03-02 20:11:58 -04:00

84 lines
2.2 KiB
Haskell

{- git-annex command
-
- Copyright 2010-2014 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.PreCommit where
import Common.Annex
import Command
import Config
import qualified Command.Add
import qualified Command.Fix
import Annex.Direct
import Annex.Hook
import Annex.View
import Annex.View.ViewedFile
import Logs.View
import Logs.MetaData
import Types.View
import Types.MetaData
import qualified Data.Set as S
def :: [Command]
def = [command "pre-commit" paramPaths seek SectionPlumbing
"run by git pre-commit hook"]
seek :: CommandSeek
seek ps = ifM isDirect
( do
-- update direct mode mappings for committed files
withWords startDirect ps
runAnnexHook preCommitAnnexHook
, do
-- fix symlinks to files being committed
withFilesToBeCommitted (whenAnnexed Command.Fix.start) ps
-- inject unlocked files into the annex
withFilesUnlockedToBeCommitted startIndirect ps
runAnnexHook preCommitAnnexHook
-- committing changes to a view updates metadata
mv <- currentView
case mv of
Nothing -> noop
Just v -> withViewChanges
(addViewMetaData v)
(removeViewMetaData v)
)
startIndirect :: FilePath -> CommandStart
startIndirect f = next $ do
unlessM (callCommandAction $ Command.Add.start f) $
error $ "failed to add " ++ f ++ "; canceling commit"
next $ return True
startDirect :: [String] -> CommandStart
startDirect _ = next $ next $ preCommitDirect
addViewMetaData :: View -> ViewedFile -> Key -> CommandStart
addViewMetaData v f k = do
showStart "metadata" f
next $ next $ changeMetaData k $ fromView v f
removeViewMetaData :: View -> ViewedFile -> Key -> CommandStart
removeViewMetaData v f k = do
showStart "metadata" f
next $ next $ changeMetaData k $ unsetMetaData $ fromView v f
changeMetaData :: Key -> MetaData -> CommandCleanup
changeMetaData k metadata = do
showMetaDataChange metadata
addMetaData k metadata
return True
showMetaDataChange :: MetaData -> Annex ()
showMetaDataChange = showLongNote . unlines . concatMap showmeta . fromMetaData
where
showmeta (f, vs) = map (showmetavalue f) $ S.toList vs
showmetavalue f v = fromMetaField f ++ showset v ++ "=" ++ fromMetaValue v
showset v
| isSet v = "+"
| otherwise = "-"