git-annex/Git/Version.hs
Joey Hess e213ef310f git-annex (5.20140717) unstable; urgency=high
* Fix minor FD leak in journal code. Closes: #754608
  * direct: Fix handling of case where a work tree subdirectory cannot
    be written to due to permissions.
  * migrate: Avoid re-checksumming when migrating from hashE to hash backend.
  * uninit: Avoid failing final removal in some direct mode repositories
    due to file modes.
  * S3: Deal with AWS ACL configurations that do not allow creating or
    checking the location of a bucket, but only reading and writing content to
    it.
  * resolvemerge: New plumbing command that runs the automatic merge conflict
    resolver.
  * Deal with change in git 2.0 that made indirect mode merge conflict
    resolution leave behind old files.
  * sync: Fix git sync with local git remotes even when they don't have an
    annex.uuid set. (The assistant already did so.)
  * Set gcrypt-publish-participants when setting up a gcrypt repository,
    to avoid unncessary passphrase prompts.
    This is a security/usability tradeoff. To avoid exposing the gpg key
    ids who can decrypt the repository, users can unset
    gcrypt-publish-participants.
  * Install nautilus hooks even when ~/.local/share/nautilus/ does not yet
    exist, since it is not automatically created for Gnome 3 users.
  * Windows: Move .vbs files out of git\bin, to avoid that being in the
    PATH, which caused some weird breakage. (Thanks, divB)
  * Windows: Fix locking issue that prevented the webapp starting
    (since 5.20140707).

# imported from the archive
2014-07-17 11:27:25 -04:00

43 lines
1.1 KiB
Haskell

{- git versions
-
- Copyright 2011, 2013 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Git.Version where
import Common
data GitVersion = GitVersion String Integer
deriving (Eq)
instance Ord GitVersion where
compare (GitVersion _ x) (GitVersion _ y) = compare x y
instance Show GitVersion where
show (GitVersion s _) = s
installed :: IO GitVersion
installed = normalize . extract <$> readProcess "git" ["--version"]
where
extract s = case lines s of
[] -> ""
(l:_) -> unwords $ drop 2 $ words l
{- To compare dotted versions like 1.7.7 and 1.8, they are normalized to
- a somewhat arbitrary integer representation. -}
normalize :: String -> GitVersion
normalize v = GitVersion v $
sum $ mult 1 $ reverse $ extend precision $ take precision $
map readi $ split "." v
where
extend n l = l ++ replicate (n - length l) 0
mult _ [] = []
mult n (x:xs) = (n*x) : mult (n*10^width) xs
readi :: String -> Integer
readi s = case reads s of
((x,_):_) -> x
_ -> 0
precision = 10 -- number of segments of the version to compare
width = length "yyyymmddhhmmss" -- maximum width of a segment