diff options
Diffstat (limited to 'Git/Ref.hs')
| -rw-r--r-- | Git/Ref.hs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Git/Ref.hs b/Git/Ref.hs index 02adf0547..3f7613726 100644 --- a/Git/Ref.hs +++ b/Git/Ref.hs @@ -37,6 +37,13 @@ exists :: Ref -> Repo -> IO Bool exists ref = runBool "show-ref" [Param "--verify", Param "-q", Param $ show ref] +{- Checks if HEAD exists. It generally will, except for in a repository + - that was just created. -} +headExists :: Repo -> IO Bool +headExists repo = do + ls <- lines <$> pipeReadStrict [Param "show-ref", Param "--head"] repo + return $ any (" HEAD" `isSuffixOf`) ls + {- Get the sha of a fully qualified git ref, if it exists. -} sha :: Branch -> Repo -> IO (Maybe Sha) sha branch repo = process <$> showref repo |