comparison mercurial/localrepo.py @ 14270:d6907a5674a2

revlog: support writing generaldelta revlogs

With generaldelta switched on, deltas are always computed against the first
parent when adding revisions. This is done regardless of what revision the
incoming bundle, if any, is deltaed against.

The exact delta building strategy is subject to change, but this will not
affect compatibility.

Generaldelta is switched off by default.

14269:66257848c154

propertycache = util.propertycache

class localrepository(repo.repository):
    capabilities = set(('lookup', 'changegroupsubset', 'branchmap', 'pushkey',
                        'known', 'getbundle'))
    supportedformats = set(('revlogv1',))
    supported = supportedformats | set(('store', 'fncache', 'shared',
                                        'dotencode'))

    def __init__(self, baseui, path=None, create=0):
        repo.repository.__init__(self)

                    self.opener.append(
                        "00changelog.i",
                        '\0\0\0\2' # represents revlogv2
                        ' dummy changelog to prevent using the old repo layout'
                    )
            else:
                raise error.RepoError(_("repository %s not found") % path)
        elif create:
            raise error.RepoError(_("repository %s already exists") % path)
        else:

        self._transref = self._lockref = self._wlockref = None

    def _applyrequirements(self, requirements):
        self.requirements = requirements
        self.sopener.options = {}

    def _writerequirements(self):
        reqfile = self.opener("requires", "w")
        for r in self.requirements:
            reqfile.write("%s\n" % r)

14270:d6907a5674a2

propertycache = util.propertycache

class localrepository(repo.repository):
    capabilities = set(('lookup', 'changegroupsubset', 'branchmap', 'pushkey',
                        'known', 'getbundle'))
    supportedformats = set(('revlogv1', 'generaldelta'))
    supported = supportedformats | set(('store', 'fncache', 'shared',
                                        'dotencode'))

    def __init__(self, baseui, path=None, create=0):
        repo.repository.__init__(self)

                    self.opener.append(
                        "00changelog.i",
                        '\0\0\0\2' # represents revlogv2
                        ' dummy changelog to prevent using the old repo layout'
                    )
                if self.ui.configbool('format', 'generaldelta', False):
                    requirements.append("generaldelta")
            else:
                raise error.RepoError(_("repository %s not found") % path)
        elif create:
            raise error.RepoError(_("repository %s already exists") % path)
        else:

        self._transref = self._lockref = self._wlockref = None

    def _applyrequirements(self, requirements):
        self.requirements = requirements
        self.sopener.options = {}
        if 'generaldelta' in requirements:
            self.sopener.options['generaldelta'] = 1

    def _writerequirements(self):
        reqfile = self.opener("requires", "w")
        for r in self.requirements:
            reqfile.write("%s\n" % r)