Mercurial > hg > mercurial-crew-with-dirclash
diff mercurial/localrepo.py @ 4168:bbfe5a3fc80c
Add a features list to branches.cache to detect caches of old hg versions.
The leading space in the written file makes sure that the feature list never
can match an existing version, even if the first feature can be read as hex.
Additionally old hg versions display the id with --debug, too.
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 09 Mar 2007 19:12:03 +0100 |
| parents | 4574a8cb080f |
| children | ac9e891f2c0f 7b5723c95a82 |
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--- a/mercurial/localrepo.py +++ b/mercurial/localrepo.py @@ -17,6 +17,7 @@ demandload(globals(), "os revlog time ut class localrepository(repo.repository): capabilities = ('lookup', 'changegroupsubset') supported = ('revlogv1', 'store') + branchcache_features = ('unnamed',) def __del__(self): self.transhandle = None @@ -376,6 +377,22 @@ class localrepository(repo.repository): f = self.opener("branches.cache") lines = f.read().split('\n') f.close() + features = lines.pop(0).strip() + if not features.startswith('features: '): + raise ValueError(_('branch cache: no features specified')) + features = features.split(' ', 1)[1].split() + missing_features = [] + for feature in self.branchcache_features: + try: + features.remove(feature) + except ValueError, inst: + missing_features.append(feature) + if missing_features: + raise ValueError(_('branch cache: missing features: %s') + % ', '.join(missing_features)) + if features: + raise ValueError(_('branch cache: unknown features: %s') + % ', '.join(features)) last, lrev = lines.pop(0).split(" ", 1) last, lrev = bin(last), int(lrev) if not (lrev < self.changelog.count() and @@ -397,6 +414,7 @@ class localrepository(repo.repository): def _writebranchcache(self, branches, tip, tiprev): try: f = self.opener("branches.cache", "w") + f.write(" features: %s\n" % ' '.join(self.branchcache_features)) f.write("%s %s\n" % (hex(tip), tiprev)) for label, node in branches.iteritems(): f.write("%s %s\n" % (hex(node), label))