Mercurial > public > mercurial-scm > hg-stable
diff mercurial/utils/storageutil.py @ 40006:1d97a332c6d9
storageutil: extract copy metadata retrieval out of filelog
As part of implementing an alternate storage backend, I found myself
reinventing this wheel.
Let's create a utility function for doing the work.
Differential Revision: https://phab.mercurial-scm.org/D4800
| author | Gregory Szorc <gregory.szorc@gmail.com> |
|---|---|
| date | Fri, 28 Sep 2018 11:37:49 -0700 |
| parents | fa3dc85a747e |
| children | 422beffd71ba |
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--- a/mercurial/utils/storageutil.py Fri Sep 28 11:29:05 2018 -0700 +++ b/mercurial/utils/storageutil.py Fri Sep 28 11:37:49 2018 -0700 @@ -89,6 +89,25 @@ offset = text.index(b'\x01\n', 2) return text[offset + 2:] +def filerevisioncopied(store, node): + """Resolve file revision copy metadata. + + Returns ``False`` if the file has no copy metadata. Otherwise a + 2-tuple of the source filename and node. + """ + if store.parents(node)[0] != nullid: + return False + + meta = parsemeta(store.revision(node))[0] + + # copy and copyrev occur in pairs. In rare cases due to old bugs, + # one can occur without the other. So ensure both are present to flag + # as a copy. + if meta and b'copy' in meta and b'copyrev' in meta: + return meta[b'copy'], bin(meta[b'copyrev']) + + return False + def iterrevs(storelen, start=0, stop=None): """Iterate over revision numbers in a store.""" step = 1