annotate hgext/narrow/narrowrepo.py @ 36089:e14821b290eb

narrowrepo: make repo requirement include the string 'experimental'

We can just move to "narrow" or similar when we finalize the
format. I'm not sure what the migration process from one requirement
to another should look like, but we're about to cross that bridge at
Google once this change lands, so hopefully we'll know soon.

Differential Revision: https://phab.mercurial-scm.org/D2007

# narrowrepo.py - repository which supports narrow revlogs, lazy loading
#
# Copyright 2017 Google, 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

from mercurial import (
    bundlerepo,
    localrepo,
    match as matchmod,
    scmutil,
)

from .. import (
    share,
)

from . import (
    narrowrevlog,
    narrowspec,
)

# When narrowing is finalized and no longer subject to format changes,
# we should move this to just "narrow" or similar.
REQUIREMENT = 'narrowhg-experimental'

def wrappostshare(orig, sourcerepo, destrepo, **kwargs):
    orig(sourcerepo, destrepo, **kwargs)
    if REQUIREMENT in sourcerepo.requirements:
        with destrepo.wlock():
            with destrepo.vfs('shared', 'a') as fp:
                fp.write(narrowspec.FILENAME + '\n')

def unsharenarrowspec(orig, ui, repo, repopath):
    if (REQUIREMENT in repo.requirements
        and repo.path == repopath and repo.shared()):
        srcrepo = share._getsrcrepo(repo)
        with srcrepo.vfs(narrowspec.FILENAME) as f:
            spec = f.read()
        with repo.vfs(narrowspec.FILENAME, 'w') as f:
            f.write(spec)
    return orig(ui, repo, repopath)

def wraprepo(repo, opts_narrow):
    """Enables narrow clone functionality on a single local repository."""

    cacheprop = localrepo.storecache
    if isinstance(repo, bundlerepo.bundlerepository):
        # We have to use a different caching property decorator for
        # bundlerepo because storecache blows up in strange ways on a
        # bundlerepo. Fortunately, there's no risk of data changing in
        # a bundlerepo.
        cacheprop = lambda name: localrepo.unfilteredpropertycache

    class narrowrepository(repo.__class__):

        def _constructmanifest(self):
            manifest = super(narrowrepository, self)._constructmanifest()
            narrowrevlog.makenarrowmanifestrevlog(manifest, repo)
            return manifest

        @cacheprop('00manifest.i')
        def manifestlog(self):
            mfl = super(narrowrepository, self).manifestlog
            narrowrevlog.makenarrowmanifestlog(mfl, self)
            return mfl

        def file(self, f):
            fl = super(narrowrepository, self).file(f)
            narrowrevlog.makenarrowfilelog(fl, self.narrowmatch())
            return fl

        @localrepo.repofilecache(narrowspec.FILENAME)
        def narrowpats(self):
            return narrowspec.load(self)

        @localrepo.repofilecache(narrowspec.FILENAME)
        def _narrowmatch(self):
            include, exclude = self.narrowpats
            if not opts_narrow and not include and not exclude:
                return matchmod.always(self.root, '')
            return narrowspec.match(self.root, include=include, exclude=exclude)

        # TODO(martinvonz): make this property-like instead?
        def narrowmatch(self):
            return self._narrowmatch

        def setnarrowpats(self, newincludes, newexcludes):
            narrowspec.save(self, newincludes, newexcludes)
            self.invalidate(clearfilecache=True)

        # I'm not sure this is the right place to do this filter.
        # context._manifestmatches() would probably be better, or perhaps
        # move it to a later place, in case some of the callers do want to know
        # which directories changed. This seems to work for now, though.
        def status(self, *args, **kwargs):
            s = super(narrowrepository, self).status(*args, **kwargs)
            narrowmatch = self.narrowmatch()
            modified = filter(narrowmatch, s.modified)
            added = filter(narrowmatch, s.added)
            removed = filter(narrowmatch, s.removed)
            deleted = filter(narrowmatch, s.deleted)
            unknown = filter(narrowmatch, s.unknown)
            ignored = filter(narrowmatch, s.ignored)
            clean = filter(narrowmatch, s.clean)
            return scmutil.status(modified, added, removed, deleted, unknown,
                                  ignored, clean)

    repo.__class__ = narrowrepository