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# bundlerepo.py - repository class for viewing uncompressed bundles
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#
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# Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.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 viewing uncompressed bundles.
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This provides a read-only repository interface to bundles as if they
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were part of the actual repository.
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"""
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from node import nullid
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from i18n import _
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import os, tempfile, shutil
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import changegroup, util, mdiff, discovery, cmdutil, scmutil
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import localrepo, changelog, manifest, filelog, revlog, error
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class bundlerevlog(revlog.revlog):
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def __init__(self, opener, indexfile, bundle, linkmapper):
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# How it works:
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# To retrieve a revision, we need to know the offset of the revision in
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# the bundle (an unbundle object). We store this offset in the index
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# (start). The base of the delta is stored in the base field.
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#
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# To differentiate a rev in the bundle from a rev in the revlog, we
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# 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.bundle = bundle
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n = len(self)
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self.repotiprev = n - 1
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chain = None
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self.bundlerevs = set() # used by 'bundle()' revset expression
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while True:
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chunkdata = bundle.deltachunk(chain)
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if not chunkdata:
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break
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node = chunkdata['node']
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p1 = chunkdata['p1']
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p2 = chunkdata['p2']
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cs = chunkdata['cs']
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deltabase = chunkdata['deltabase']
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delta = chunkdata['delta']
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size = len(delta)
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start = bundle.tell() - size
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link = linkmapper(cs)
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if node in self.nodemap:
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# this can happen if two branches make the same change
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chain = node
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self.bundlerevs.add(self.nodemap[node])
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continue
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for p in (p1, p2):
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if p not in self.nodemap:
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raise error.LookupError(p, self.indexfile,
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_("unknown parent"))
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if deltabase not in self.nodemap:
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raise LookupError(deltabase, self.indexfile,
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_('unknown delta base'))
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baserev = self.rev(deltabase)
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# start, size, full unc. size, base (unused), link, p1, p2, node
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e = (revlog.offset_type(start, 0), size, -1, baserev, link,
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self.rev(p1), self.rev(p2), 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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chain = node
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n += 1
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def _chunk(self, rev):
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# Warning: in case of bundle, the diff is against what we stored as
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# delta base, not against rev - 1
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# XXX: could use some caching
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if rev <= self.repotiprev:
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return revlog.revlog._chunk(self, rev)
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self.bundle.seek(self.start(rev))
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return self.bundle.read(self.length(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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# hot path for bundle
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revb = self.index[rev2][3]
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if revb == rev1:
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return self._chunk(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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text = None
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chain = []
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iterrev = rev
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# reconstruct the revision if it is from a changegroup
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while iterrev > self.repotiprev:
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if self._cache and self._cache[1] == iterrev:
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text = self._cache[2]
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break
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chain.append(iterrev)
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iterrev = self.index[iterrev][3]
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if text is None:
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text = revlog.revlog.revision(self, iterrev)
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while chain:
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delta = self._chunk(chain.pop())
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text = mdiff.patches(text, [delta])
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self._checkhash(text, node, rev)
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self._cache = (node, rev, text)
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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 bundlechangelog(bundlerevlog, changelog.changelog):
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def __init__(self, opener, bundle):
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changelog.changelog.__init__(self, opener)
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linkmapper = lambda x: x
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bundlerevlog.__init__(self, opener, self.indexfile, bundle,
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linkmapper)
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class bundlemanifest(bundlerevlog, manifest.manifest):
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def __init__(self, opener, bundle, linkmapper):
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manifest.manifest.__init__(self, opener)
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bundlerevlog.__init__(self, opener, self.indexfile, bundle,
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linkmapper)
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class bundlefilelog(bundlerevlog, filelog.filelog):
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def __init__(self, opener, path, bundle, linkmapper, repo):
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filelog.filelog.__init__(self, opener, path)
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bundlerevlog.__init__(self, opener, self.indexfile, bundle,
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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 bundlepeer(localrepo.localpeer):
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def canpush(self):
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return False
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class bundlerepository(localrepo.localrepository):
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def __init__(self, ui, path, bundlename):
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self._tempparent = None
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try:
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localrepo.localrepository.__init__(self, ui, path)
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except error.RepoError:
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self._tempparent = tempfile.mkdtemp()
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localrepo.instance(ui, self._tempparent, 1)
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localrepo.localrepository.__init__(self, ui, self._tempparent)
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self.ui.setconfig('phases', 'publish', False)
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if path:
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self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename
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else:
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self._url = 'bundle:' + bundlename
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self.tempfile = None
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f = util.posixfile(bundlename, "rb")
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self.bundle = changegroup.readbundle(f, bundlename)
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if self.bundle.compressed():
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fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-",
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suffix=".hg10un", dir=self.path)
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self.tempfile = temp
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fptemp = os.fdopen(fdtemp, 'wb')
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try:
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fptemp.write("HG10UN")
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while True:
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chunk = self.bundle.read(2**18)
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if not chunk:
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break
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fptemp.write(chunk)
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finally:
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fptemp.close()
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f = util.posixfile(self.tempfile, "rb")
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self.bundle = changegroup.readbundle(f, bundlename)
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# dict with the mapping 'filename' -> position in the bundle
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self.bundlefilespos = {}
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@localrepo.unfilteredpropertycache
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def changelog(self):
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# consume the header if it exists
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self.bundle.changelogheader()
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c = bundlechangelog(self.sopener, self.bundle)
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self.manstart = self.bundle.tell()
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return c
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@localrepo.unfilteredpropertycache
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def manifest(self):
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self.bundle.seek(self.manstart)
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# consume the header if it exists
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self.bundle.manifestheader()
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m = bundlemanifest(self.sopener, self.bundle, self.changelog.rev)
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self.filestart = self.bundle.tell()
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return m
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@localrepo.unfilteredpropertycache
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def manstart(self):
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self.changelog
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return self.manstart
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@localrepo.unfilteredpropertycache
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def filestart(self):
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self.manifest
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return self.filestart
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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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if not self.bundlefilespos:
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self.bundle.seek(self.filestart)
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while True:
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chunkdata = self.bundle.filelogheader()
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if not chunkdata:
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break
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fname = chunkdata['filename']
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self.bundlefilespos[fname] = self.bundle.tell()
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while True:
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c = self.bundle.deltachunk(None)
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if not c:
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break
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if f in self.bundlefilespos:
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self.bundle.seek(self.bundlefilespos[f])
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return bundlefilelog(self.sopener, f, self.bundle,
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self.changelog.rev, self)
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else:
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return filelog.filelog(self.sopener, f)
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def close(self):
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"""Close assigned bundle file immediately."""
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self.bundle.close()
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if self.tempfile is not None:
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os.unlink(self.tempfile)
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if self._tempparent:
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shutil.rmtree(self._tempparent, True)
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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 bundlepeer(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 bundle 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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u = util.url(path)
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path = u.localpath()
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if u.scheme == 'bundle':
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s = path.split("+", 1)
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if len(s) == 1:
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repopath, bundlename = parentpath, s[0]
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else:
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repopath, bundlename = s
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else:
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repopath, bundlename = parentpath, path
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return bundlerepository(ui, repopath, bundlename)
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def getremotechanges(ui, repo, other, onlyheads=None, bundlename=None,
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force=False):
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'''obtains a bundle of changes incoming from other
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"onlyheads" restricts the returned changes to those reachable from the
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specified heads.
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"bundlename", if given, stores the bundle to this file path permanently;
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otherwise it's stored to a temp file and gets deleted again when you call
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the returned "cleanupfn".
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"force" indicates whether to proceed on unrelated repos.
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Returns a tuple (local, csets, cleanupfn):
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"local" is a local repo from which to obtain the actual incoming
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changesets; it is a bundlerepo for the obtained bundle when the
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original "other" is remote.
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"csets" lists the incoming changeset node ids.
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"cleanupfn" must be called without arguments when you're done processing
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the changes; it closes both the original "other" and the one returned
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here.
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'''
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tmp = discovery.findcommonincoming(repo, other, heads=onlyheads,
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force=force)
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common, incoming, rheads = tmp
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if not incoming:
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try:
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if bundlename:
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os.unlink(bundlename)
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except OSError:
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pass
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return repo, [], other.close
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bundle = None
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bundlerepo = None
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localrepo = other.local()
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if bundlename or not localrepo:
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# create a bundle (uncompressed if other repo is not local)
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if other.capable('getbundle'):
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cg = other.getbundle('incoming', common=common, heads=rheads)
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elif onlyheads is None and not other.capable('changegroupsubset'):
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# compat with older servers when pulling all remote heads
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cg = other.changegroup(incoming, "incoming")
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rheads = None
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else:
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cg = other.changegroupsubset(incoming, rheads, 'incoming')
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bundletype = localrepo and "HG10BZ" or "HG10UN"
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fname = bundle = changegroup.writebundle(cg, bundlename, bundletype)
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# keep written bundle?
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if bundlename:
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bundle = None
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if not localrepo:
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# use the created uncompressed bundlerepo
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localrepo = bundlerepo = bundlerepository(repo.baseui, repo.root,
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fname)
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# this repo contains local and other now, so filter out local again
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common = repo.heads()
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if localrepo:
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# Part of common may be remotely filtered
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# So use an unfiltered version
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# The discovery process probably need cleanup to avoid that
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localrepo = localrepo.unfiltered()
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csets = localrepo.changelog.findmissing(common, rheads)
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def cleanup():
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if bundlerepo:
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bundlerepo.close()
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if bundle:
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os.unlink(bundle)
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other.close()
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return (localrepo, csets, cleanup)
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