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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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encoding,
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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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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(object):
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"""Represents the union of data in 2 repositories.
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Instances are not usable if constructed directly. Use ``instance()``
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or ``makeunionrepository()`` to create a usable instance.
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"""
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def __init__(self, repo2, url):
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self.repo2 = repo2
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self._url = url
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self.ui.setconfig('phases', 'publish', False, 'unionrepo')
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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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@localrepo.unfilteredpropertycache
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def manifestlog(self):
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rootstore = unionmanifest(self.svfs, self.repo2.svfs,
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self.unfiltered()._clrev)
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return manifest.manifestlog(self.svfs, self, rootstore)
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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 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 encoding.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(encoding.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 = encoding.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 makeunionrepository(ui, repopath, repopath2)
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def makeunionrepository(ui, repopath1, repopath2):
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"""Make a union repository object from 2 local repo paths."""
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repo1 = localrepo.instance(ui, repopath1, create=False)
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repo2 = localrepo.instance(ui, repopath2, create=False)
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url = 'union:%s+%s' % (util.expandpath(repopath1),
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util.expandpath(repopath2))
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class derivedunionrepository(unionrepository, repo1.__class__):
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pass
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repo = repo1
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repo.__class__ = derivedunionrepository
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unionrepository.__init__(repo1, repo2, url)
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return repo
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