Mercurial > hg
view hgext/lfs/pointer.py @ 36744:33275ab5e837 stable
revlog: do not use delta for lfs revisions
This is similar to what we have done for changegroups. It is needed to make
sure the delta application code path can assume deltas are always against
vanilla (ex. non-LFS) rawtext so the next fix becomes possible.
Differential Revision: https://phab.mercurial-scm.org/D2068
author | Jun Wu <quark@fb.com> |
---|---|
date | Tue, 13 Feb 2018 11:35:32 -0800 |
parents | b8e5fb8d2389 |
children | 95bd9e396774 |
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# pointer.py - Git-LFS pointer serialization # # Copyright 2017 Facebook, Inc. # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import re from mercurial.i18n import _ from mercurial import ( error, ) class InvalidPointer(error.RevlogError): pass class gitlfspointer(dict): VERSION = 'https://git-lfs.github.com/spec/v1' def __init__(self, *args, **kwargs): self['version'] = self.VERSION super(gitlfspointer, self).__init__(*args, **kwargs) @classmethod def deserialize(cls, text): try: return cls(l.split(' ', 1) for l in text.splitlines()).validate() except ValueError: # l.split returns 1 item instead of 2 raise InvalidPointer(_('cannot parse git-lfs text: %r') % text) def serialize(self): sortkeyfunc = lambda x: (x[0] != 'version', x) items = sorted(self.validate().iteritems(), key=sortkeyfunc) return ''.join('%s %s\n' % (k, v) for k, v in items) def oid(self): return self['oid'].split(':')[-1] def size(self): return int(self['size']) # regular expressions used by _validate # see https://github.com/git-lfs/git-lfs/blob/master/docs/spec.md _keyre = re.compile(r'\A[a-z0-9.-]+\Z') _valuere = re.compile(r'\A[^\n]*\Z') _requiredre = { 'size': re.compile(r'\A[0-9]+\Z'), 'oid': re.compile(r'\Asha256:[0-9a-f]{64}\Z'), 'version': re.compile(r'\A%s\Z' % re.escape(VERSION)), } def validate(self): """raise InvalidPointer on error. return self if there is no error""" requiredcount = 0 for k, v in self.iteritems(): if k in self._requiredre: if not self._requiredre[k].match(v): raise InvalidPointer(_('unexpected value: %s=%r') % (k, v)) requiredcount += 1 elif not self._keyre.match(k): raise InvalidPointer(_('unexpected key: %s') % k) if not self._valuere.match(v): raise InvalidPointer(_('unexpected value: %s=%r') % (k, v)) if len(self._requiredre) != requiredcount: miss = sorted(set(self._requiredre.keys()).difference(self.keys())) raise InvalidPointer(_('missed keys: %s') % ', '.join(miss)) return self deserialize = gitlfspointer.deserialize