mercurial/unionrepo.py
author Augie Fackler <augie@google.com>
Wed, 12 Sep 2018 11:38:46 -0400
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parent 39549 089fc0db0954
child 39605 23f2299e9e53
permissions -rw-r--r--
tests: handle Python 3 not quoting non-empty-directory error I assume this happens on Windows too, so I did the same regex on both versions of the output. The whole message printed by these aborts comes from Python, so if we want to exert control over the quoting here it'll be a bit of a pain. Differential Revision: https://phab.mercurial-scm.org/D4546
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# unionrepo.py - repository class for viewing union of repository changesets
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#
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# Derived from bundlerepo.py
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# Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com>
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# Copyright 2013 Unity Technologies, Mads Kiilerich <madski@unity3d.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""Repository class for "in-memory pull" of one local repository to another,
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allowing operations like diff and log with revsets.
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"""
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from __future__ import absolute_import
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from .i18n import _
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from .node import nullid
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from . import (
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    changelog,
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    cmdutil,
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    error,
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    filelog,
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    localrepo,
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    manifest,
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    mdiff,
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    pathutil,
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    pycompat,
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    revlog,
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    util,
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    vfs as vfsmod,
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)
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class unionrevlog(revlog.revlog):
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    def __init__(self, opener, indexfile, revlog2, linkmapper):
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        # How it works:
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        # To retrieve a revision, we just need to know the node id so we can
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        # look it up in revlog2.
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        #
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        # To differentiate a rev in the second revlog from a rev in the revlog,
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        # we check revision against repotiprev.
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        opener = vfsmod.readonlyvfs(opener)
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        revlog.revlog.__init__(self, opener, indexfile)
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        self.revlog2 = revlog2
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        n = len(self)
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        self.repotiprev = n - 1
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        self.bundlerevs = set() # used by 'bundle()' revset expression
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        for rev2 in self.revlog2:
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            rev = self.revlog2.index[rev2]
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            # rev numbers - in revlog2, very different from self.rev
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            _start, _csize, rsize, base, linkrev, p1rev, p2rev, node = rev
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            flags = _start & 0xFFFF
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            if linkmapper is None: # link is to same revlog
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                assert linkrev == rev2 # we never link back
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                link = n
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            else: # rev must be mapped from repo2 cl to unified cl by linkmapper
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                link = linkmapper(linkrev)
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            if linkmapper is not None: # link is to same revlog
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                base = linkmapper(base)
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            if node in self.nodemap:
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                # this happens for the common revlog revisions
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                self.bundlerevs.add(self.nodemap[node])
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                continue
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            p1node = self.revlog2.node(p1rev)
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            p2node = self.revlog2.node(p2rev)
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            # TODO: it's probably wrong to set compressed length to None, but
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            # I have no idea if csize is valid in the base revlog context.
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            e = (flags, None, rsize, base,
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                 link, self.rev(p1node), self.rev(p2node), node)
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            self.index.append(e)
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            self.nodemap[node] = n
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            self.bundlerevs.add(n)
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            n += 1
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    def _chunk(self, rev):
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        if rev <= self.repotiprev:
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            return revlog.revlog._chunk(self, rev)
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        return self.revlog2._chunk(self.node(rev))
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    def revdiff(self, rev1, rev2):
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        """return or calculate a delta between two revisions"""
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        if rev1 > self.repotiprev and rev2 > self.repotiprev:
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            return self.revlog2.revdiff(
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                self.revlog2.rev(self.node(rev1)),
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                self.revlog2.rev(self.node(rev2)))
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        elif rev1 <= self.repotiprev and rev2 <= self.repotiprev:
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            return self.baserevdiff(rev1, rev2)
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        return mdiff.textdiff(self.revision(rev1), self.revision(rev2))
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    def revision(self, nodeorrev, _df=None, raw=False):
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        """return an uncompressed revision of a given node or revision
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        number.
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        """
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        if isinstance(nodeorrev, int):
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            rev = nodeorrev
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            node = self.node(rev)
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        else:
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            node = nodeorrev
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            rev = self.rev(node)
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        if node == nullid:
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            return ""
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        if rev > self.repotiprev:
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            text = self.revlog2.revision(node)
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            self._cache = (node, rev, text)
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        else:
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            text = self.baserevision(rev)
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            # already cached
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        return text
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    def baserevision(self, nodeorrev):
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        # Revlog subclasses may override 'revision' method to modify format of
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        # content retrieved from revlog. To use unionrevlog with such class one
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        # needs to override 'baserevision' and make more specific call here.
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        return revlog.revlog.revision(self, nodeorrev)
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    def baserevdiff(self, rev1, rev2):
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        # Exists for the same purpose as baserevision.
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        return revlog.revlog.revdiff(self, rev1, rev2)
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    def addrevision(self, text, transaction, link, p1=None, p2=None, d=None):
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        raise NotImplementedError
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    def addgroup(self, deltas, transaction, addrevisioncb=None):
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        raise NotImplementedError
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    def strip(self, rev, minlink):
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        raise NotImplementedError
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    def checksize(self):
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        raise NotImplementedError
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class unionchangelog(unionrevlog, changelog.changelog):
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    def __init__(self, opener, opener2):
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        changelog.changelog.__init__(self, opener)
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        linkmapper = None
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        changelog2 = changelog.changelog(opener2)
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        unionrevlog.__init__(self, opener, self.indexfile, changelog2,
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                             linkmapper)
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    def baserevision(self, nodeorrev):
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        # Although changelog doesn't override 'revision' method, some extensions
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        # may replace this class with another that does. Same story with
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        # manifest and filelog classes.
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        return changelog.changelog.revision(self, nodeorrev)
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    def baserevdiff(self, rev1, rev2):
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        return changelog.changelog.revdiff(self, rev1, rev2)
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class unionmanifest(unionrevlog, manifest.manifestrevlog):
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    def __init__(self, opener, opener2, linkmapper):
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        manifest.manifestrevlog.__init__(self, opener)
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        manifest2 = manifest.manifestrevlog(opener2)
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        unionrevlog.__init__(self, opener, self.indexfile, manifest2,
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                             linkmapper)
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    def baserevision(self, nodeorrev):
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        return manifest.manifestrevlog.revision(self, nodeorrev)
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    def baserevdiff(self, rev1, rev2):
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        return manifest.manifestrevlog.revdiff(self, rev1, rev2)
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class unionfilelog(filelog.filelog):
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    def __init__(self, opener, path, opener2, linkmapper, repo):
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        filelog.filelog.__init__(self, opener, path)
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        filelog2 = filelog.filelog(opener2, path)
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        self._revlog = unionrevlog(opener, self.indexfile,
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                                   filelog2._revlog, linkmapper)
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        self._repo = repo
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        self.repotiprev = self._revlog.repotiprev
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        self.revlog2 = self._revlog.revlog2
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    def baserevision(self, nodeorrev):
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        return filelog.filelog.revision(self, nodeorrev)
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    def baserevdiff(self, rev1, rev2):
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        return filelog.filelog.revdiff(self, rev1, rev2)
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    def iscensored(self, rev):
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        """Check if a revision is censored."""
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        if rev <= self.repotiprev:
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            return filelog.filelog.iscensored(self, rev)
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        node = self.node(rev)
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        return self.revlog2.iscensored(self.revlog2.rev(node))
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class unionpeer(localrepo.localpeer):
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    def canpush(self):
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        return False
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class unionrepository(localrepo.localrepository):
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    def __init__(self, ui, path, path2):
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        localrepo.localrepository.__init__(self, ui, path)
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        self.ui.setconfig('phases', 'publish', False, 'unionrepo')
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        self._url = 'union:%s+%s' % (util.expandpath(path),
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                                     util.expandpath(path2))
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        self.repo2 = localrepo.localrepository(ui, path2)
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    @localrepo.unfilteredpropertycache
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    def changelog(self):
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        return unionchangelog(self.svfs, self.repo2.svfs)
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    def _clrev(self, rev2):
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        """map from repo2 changelog rev to temporary rev in self.changelog"""
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        node = self.repo2.changelog.node(rev2)
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        return self.changelog.rev(node)
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    def _constructmanifest(self):
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        return unionmanifest(self.svfs, self.repo2.svfs,
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                             self.unfiltered()._clrev)
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    def url(self):
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        return self._url
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    def file(self, f):
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        return unionfilelog(self.svfs, f, self.repo2.svfs,
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                            self.unfiltered()._clrev, self)
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    def close(self):
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        self.repo2.close()
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    def cancopy(self):
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        return False
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    def peer(self):
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        return unionpeer(self)
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    def getcwd(self):
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        return pycompat.getcwd() # always outside the repo
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def instance(ui, path, create, intents=None, createopts=None):
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    if create:
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        raise error.Abort(_('cannot create new union repository'))
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    parentpath = ui.config("bundle", "mainreporoot")
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    if not parentpath:
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        # try to find the correct path to the working directory repo
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        parentpath = cmdutil.findrepo(pycompat.getcwd())
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        if parentpath is None:
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            parentpath = ''
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    if parentpath:
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        # Try to make the full path relative so we get a nice, short URL.
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        # In particular, we don't want temp dir names in test outputs.
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        cwd = pycompat.getcwd()
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        if parentpath == cwd:
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            parentpath = ''
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        else:
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            cwd = pathutil.normasprefix(cwd)
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            if parentpath.startswith(cwd):
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                parentpath = parentpath[len(cwd):]
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    if path.startswith('union:'):
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        s = path.split(":", 1)[1].split("+", 1)
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        if len(s) == 1:
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            repopath, repopath2 = parentpath, s[0]
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        else:
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            repopath, repopath2 = s
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    else:
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        repopath, repopath2 = parentpath, path
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    return unionrepository(ui, repopath, repopath2)