diff options
Diffstat (limited to 'Git/Ref.hs')
| -rw-r--r-- | Git/Ref.hs | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/Git/Ref.hs b/Git/Ref.hs index 954b61a2e..6ce1b8784 100644 --- a/Git/Ref.hs +++ b/Git/Ref.hs @@ -29,17 +29,42 @@ base = Ref . remove "refs/heads/" . remove "refs/remotes/" . show | prefix `isPrefixOf` s = drop (length prefix) s | otherwise = s +{- Given a directory and any ref, takes the basename of the ref and puts + - it under the directory. -} +under :: String -> Ref -> Ref +under dir r = Ref $ dir ++ "/" ++ + (reverse $ takeWhile (/= '/') $ reverse $ show r) + {- Given a directory such as "refs/remotes/origin", and a ref such as - refs/heads/master, yields a version of that ref under the directory, - such as refs/remotes/origin/master. -} -under :: String -> Ref -> Ref -under dir r = Ref $ dir </> show (base r) +underBase :: String -> Ref -> Ref +underBase dir r = Ref $ dir ++ "/" ++ show (base r) + +{- A Ref that can be used to refer to a file in the repository, as staged + - in the index. + - + - Prefixing the file with ./ makes this work even if in a subdirectory + - of a repo. + -} +fileRef :: FilePath -> Ref +fileRef f = Ref $ ":./" ++ f + +{- A Ref that can be used to refer to a file in the repository as it + - appears in a given Ref. -} +fileFromRef :: Ref -> FilePath -> Ref +fileFromRef (Ref r) f = let (Ref fr) = fileRef f in Ref (r ++ fr) {- Checks if a ref exists. -} exists :: Ref -> Repo -> IO Bool exists ref = runBool [Param "show-ref", Param "--verify", Param "-q", Param $ show ref] +{- The file used to record a ref. (Git also stores some refs in a + - packed-refs file.) -} +file :: Ref -> Repo -> FilePath +file ref repo = localGitDir repo </> show ref + {- Checks if HEAD exists. It generally will, except for in a repository - that was just created. -} headExists :: Repo -> IO Bool |