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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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import os
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from mercurial.node import nullid
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from mercurial.i18n import _
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from mercurial import util, mdiff, cmdutil, scmutil
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from mercurial import localrepo, changelog, manifest, filelog, revlog
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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 = scmutil.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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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 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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e = (None, None, None, None,
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link, self.rev(p1node), self.rev(p2node), node)
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self.index.insert(-1, 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 revlog.revlog.revdiff(self, rev1, rev2)
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return mdiff.textdiff(self.revision(self.node(rev1)),
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self.revision(self.node(rev2)))
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def revision(self, nodeorrev):
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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 = revlog.revlog.revision(self, rev)
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# already cached
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return text
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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, revs, linkmapper, transaction):
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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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class unionmanifest(unionrevlog, manifest.manifest):
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def __init__(self, opener, opener2, linkmapper):
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manifest.manifest.__init__(self, opener)
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manifest2 = manifest.manifest(opener2)
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unionrevlog.__init__(self, opener, self.indexfile, manifest2,
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linkmapper)
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class unionfilelog(unionrevlog, 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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unionrevlog.__init__(self, opener, self.indexfile, filelog2,
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linkmapper)
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self._repo = repo
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def _file(self, f):
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self._repo.file(f)
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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)
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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.sopener, self.repo2.sopener)
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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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@localrepo.unfilteredpropertycache
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def manifest(self):
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return unionmanifest(self.sopener, self.repo2.sopener,
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self._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.sopener, f, self.repo2.sopener,
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self._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 os.getcwd() # always outside the repo
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def instance(ui, path, create):
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if create:
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raise util.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(os.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 = os.getcwd()
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if parentpath == cwd:
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parentpath = ''
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else:
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cwd = os.path.join(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)
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