Mercurial > public > mercurial-scm > hg
comparison mercurial/utils/storageutil.py @ 40005:1d97a332c6d9
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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| 40004:fa3dc85a747e | 40005:1d97a332c6d9 |
|---|---|
| 87 return text | 87 return text |
| 88 | 88 |
| 89 offset = text.index(b'\x01\n', 2) | 89 offset = text.index(b'\x01\n', 2) |
| 90 return text[offset + 2:] | 90 return text[offset + 2:] |
| 91 | 91 |
| 92 def filerevisioncopied(store, node): | |
| 93 """Resolve file revision copy metadata. | |
| 94 | |
| 95 Returns ``False`` if the file has no copy metadata. Otherwise a | |
| 96 2-tuple of the source filename and node. | |
| 97 """ | |
| 98 if store.parents(node)[0] != nullid: | |
| 99 return False | |
| 100 | |
| 101 meta = parsemeta(store.revision(node))[0] | |
| 102 | |
| 103 # copy and copyrev occur in pairs. In rare cases due to old bugs, | |
| 104 # one can occur without the other. So ensure both are present to flag | |
| 105 # as a copy. | |
| 106 if meta and b'copy' in meta and b'copyrev' in meta: | |
| 107 return meta[b'copy'], bin(meta[b'copyrev']) | |
| 108 | |
| 109 return False | |
| 110 | |
| 92 def iterrevs(storelen, start=0, stop=None): | 111 def iterrevs(storelen, start=0, stop=None): |
| 93 """Iterate over revision numbers in a store.""" | 112 """Iterate over revision numbers in a store.""" |
| 94 step = 1 | 113 step = 1 |
| 95 | 114 |
| 96 if stop is not None: | 115 if stop is not None: |