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add git ls-tree --long parser

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Not yet used, but allows getting the size of items in the tree fairly
cheaply.

I noticed that CmdLine.Seek uses ls-tree and the feeds the files into
another long-running process to check their size. That would be an
example of a place that might be sped up by using this. Although in that
particular case, it only needs to know the size of unlocked files, not
locked. And since enabling --long probably doubles the ls-tree runtime
or more, the overhead of using it there may outwweigh the benefit.
This commit is contained in:
Joey Hess 2021-03-23 12:44:29 -04:00
parent d89a9b0f78
commit a8b837aaef
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GPG key ID: DB12DB0FF05F8F38
13 changed files with 97 additions and 56 deletions
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5
Git/Repair.hs
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@ -351,8 +351,9 @@ verifyTree :: MissingObjects -> Sha -> Repo -> IO Bool
verifyTree missing treesha r
| S.member treesha missing = return False
| otherwise = do
(ls, cleanup) <- pipeNullSplit (LsTree.lsTreeParams LsTree.LsTreeRecursive treesha []) r
let objshas = mapMaybe (LsTree.sha <$$> eitherToMaybe . LsTree.parseLsTree) ls
let nolong = LsTree.LsTreeLong False
(ls, cleanup) <- pipeNullSplit (LsTree.lsTreeParams LsTree.LsTreeRecursive nolong treesha []) r
let objshas = mapMaybe (LsTree.sha <$$> eitherToMaybe . LsTree.parseLsTree nolong) ls
if any (`S.member` missing) objshas
then do
void cleanup