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|
{- git-annex recent views log
-
- The most recently accessed view comes first.
-
- This file is stored locally in .git/annex/, not in the git-annex branch.
-
- Copyright 2014 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Logs.View (
currentView,
setView,
removeView,
recentViews,
branchView,
is_branchView,
prop_branchView_legal,
) where
import Annex.Common
import Types.View
import Types.MetaData
import qualified Git
import qualified Git.Branch
import qualified Git.Ref
import Git.Types
import Logs.File
import qualified Data.Set as S
import Data.Char
setView :: View -> Annex ()
setView v = do
old <- take 99 . filter (/= v) <$> recentViews
writeViews (v : old)
writeViews :: [View] -> Annex ()
writeViews l = do
f <- fromRepo gitAnnexViewLog
writeLogFile f $ unlines $ map show l
removeView :: View -> Annex ()
removeView v = writeViews =<< filter (/= v) <$> recentViews
recentViews :: Annex [View]
recentViews = do
f <- fromRepo gitAnnexViewLog
liftIO $ mapMaybe readish . lines <$> catchDefaultIO [] (readFile f)
{- Gets the currently checked out view, if there is one. -}
currentView :: Annex (Maybe View)
currentView = go =<< inRepo Git.Branch.current
where
go (Just b) | branchViewPrefix `isPrefixOf` fromRef b =
headMaybe . filter (\v -> branchView v == b) <$> recentViews
go _ = return Nothing
branchViewPrefix :: String
branchViewPrefix = "refs/heads/views"
{- Generates a git branch name for a View.
-
- There is no guarantee that each view gets a unique branch name,
- but the branch name is used to express the view as well as possible.
-}
branchView :: View -> Git.Branch
branchView view
| null name = Git.Ref branchViewPrefix
| otherwise = Git.Ref $ branchViewPrefix ++ "/" ++ name
where
name = intercalate ";" $ map branchcomp (viewComponents view)
branchcomp c
| viewVisible c = branchcomp' c
| otherwise = "(" ++ branchcomp' c ++ ")"
branchcomp' (ViewComponent metafield viewfilter _) =concat
[ forcelegal (fromMetaField metafield)
, branchvals viewfilter
]
branchvals (FilterValues set) = '=' : branchset set
branchvals (FilterGlob glob) = '=' : forcelegal glob
branchvals (ExcludeValues set) = "!=" ++ branchset set
branchset = intercalate ","
. map (forcelegal . fromMetaValue)
. S.toList
forcelegal s
| Git.Ref.legal True s = s
| otherwise = map (\c -> if isAlphaNum c then c else '_') s
is_branchView :: Git.Branch -> Bool
is_branchView (Ref b)
| b == branchViewPrefix = True
| otherwise = (branchViewPrefix ++ "/") `isPrefixOf` b
prop_branchView_legal :: View -> Bool
prop_branchView_legal = Git.Ref.legal False . fromRef . branchView
|
