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assistant: Deal with upcoming git's refusal to merge unrelated histories by default

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git 2.8.1 (or perhaps 2.9.0) is going to prevent git merge from merging in
unrelated branches. Since the webapp's pairing etc features often combine
together repositories with unrelated histories, work around this behavior
change by setting GIT_MERGE_ALLOW_UNRELATED_HISTORIES when the assistant
merges.

Note though that this is not done for git annex sync's merges, so
it will follow git's default or configured behavior.
This commit is contained in:
Joey Hess 2016-04-22 14:26:44 -04:00
parent 8ab27235ea
commit 46e3319995
Failed to extract signature
9 changed files with 90 additions and 46 deletions
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8
Annex/AutoMerge.hs
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@ -43,16 +43,16 @@ import qualified Data.ByteString.Lazy as L
- Callers should use Git.Branch.changed first, to make sure that
- there are changes from the current branch to the branch being merged in.
-}
autoMergeFrom :: Git.Ref -> Maybe Git.Ref -> Git.Branch.CommitMode -> Annex Bool
autoMergeFrom branch currbranch commitmode = do
autoMergeFrom :: Git.Ref -> Maybe Git.Ref -> [Git.Merge.MergeConfig] -> Git.Branch.CommitMode -> Annex Bool
autoMergeFrom branch currbranch mergeconfig commitmode = do
showOutput
case currbranch of
Nothing -> go Nothing
Just b -> go =<< inRepo (Git.Ref.sha b)
where
go old = ifM isDirect
( mergeDirect currbranch old branch (resolveMerge old branch False) commitmode
, inRepo (Git.Merge.mergeNonInteractive branch commitmode)
( mergeDirect currbranch old branch (resolveMerge old branch False) mergeconfig commitmode
, inRepo (Git.Merge.merge branch mergeconfig commitmode)
<||> (resolveMerge old branch False <&&> commitResolvedMerge commitmode)
)