diff options
Diffstat (limited to 'Annex/Branch.hs')
| -rw-r--r-- | Annex/Branch.hs | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/Annex/Branch.hs b/Annex/Branch.hs index 5214df627..5f3c71b1a 100644 --- a/Annex/Branch.hs +++ b/Annex/Branch.hs @@ -1,6 +1,6 @@ {- management of the git-annex branch - - - Copyright 2011-2016 Joey Hess <id@joeyh.name> + - Copyright 2011-2017 Joey Hess <id@joeyh.name> - - Licensed under the GNU GPL version 3 or higher. -} @@ -23,8 +23,9 @@ module Annex.Branch ( forceCommit, getBranch, files, - withIndex, + graftTreeish, performTransitions, + withIndex, ) where import qualified Data.ByteString.Lazy as L @@ -46,6 +47,7 @@ import qualified Git.Sha import qualified Git.Branch import qualified Git.UnionMerge import qualified Git.UpdateIndex +import qualified Git.Tree import Git.LsTree (lsTreeParams) import qualified Git.HashObject import Annex.HashObject @@ -614,3 +616,25 @@ getMergedRefs' = do parse l = let (s, b) = separate (== '\t') l in (Ref s, Ref b) + +{- Grafts a treeish into the branch at the specified location, + - and then removes it. This ensures that the treeish won't get garbage + - collected, and will always be available as long as the git-annex branch + - is available. -} +graftTreeish :: Git.Ref -> TopFilePath -> Annex () +graftTreeish treeish graftpoint = lockJournal $ \jl -> do + branchref <- getBranch + updateIndex jl branchref + Git.Tree.Tree t <- inRepo $ Git.Tree.getTree branchref + t' <- inRepo $ Git.Tree.recordTree $ Git.Tree.Tree $ + Git.Tree.RecordedSubTree graftpoint treeish [] : t + c <- inRepo $ Git.Branch.commitTree Git.Branch.AutomaticCommit + "graft" [branchref] t' + origtree <- inRepo $ Git.Tree.recordTree (Git.Tree.Tree t) + c' <- inRepo $ Git.Branch.commitTree Git.Branch.AutomaticCommit + "graft cleanup" [c] origtree + inRepo $ Git.Branch.update' fullname c' + -- The tree in c' is the same as the tree in branchref, + -- and the index was updated to that above, so it's safe to + -- say that the index contains c'. + setIndexSha c' |