Mercurial > hg
view mercurial/bundlerepo.py @ 25550:3e9049876ace
revset: gratuitous code move in '_children'
As 'cs' is empty as the time of the conditional, we can just return an empty
'baseset' and create the variable later.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Thu, 11 Jun 2015 14:27:52 -0700 |
parents | 86c0b5c09ee6 |
children | 5418dd5be8ac |
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# bundlerepo.py - repository class for viewing uncompressed bundles # # Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. """Repository class for viewing uncompressed bundles. This provides a read-only repository interface to bundles as if they were part of the actual repository. """ from node import nullid from i18n import _ import os, tempfile, shutil import changegroup, util, mdiff, discovery, cmdutil, scmutil, exchange import localrepo, changelog, manifest, filelog, revlog, error, phases, bundle2 import pathutil class bundlerevlog(revlog.revlog): def __init__(self, opener, indexfile, bundle, linkmapper): # How it works: # To retrieve a revision, we need to know the offset of the revision in # the bundle (an unbundle object). We store this offset in the index # (start). The base of the delta is stored in the base field. # # To differentiate a rev in the bundle from a rev in the revlog, we # check revision against repotiprev. opener = scmutil.readonlyvfs(opener) revlog.revlog.__init__(self, opener, indexfile) self.bundle = bundle n = len(self) self.repotiprev = n - 1 chain = None self.bundlerevs = set() # used by 'bundle()' revset expression while True: chunkdata = bundle.deltachunk(chain) if not chunkdata: break node = chunkdata['node'] p1 = chunkdata['p1'] p2 = chunkdata['p2'] cs = chunkdata['cs'] deltabase = chunkdata['deltabase'] delta = chunkdata['delta'] size = len(delta) start = bundle.tell() - size link = linkmapper(cs) if node in self.nodemap: # this can happen if two branches make the same change chain = node self.bundlerevs.add(self.nodemap[node]) continue for p in (p1, p2): if p not in self.nodemap: raise error.LookupError(p, self.indexfile, _("unknown parent")) if deltabase not in self.nodemap: raise LookupError(deltabase, self.indexfile, _('unknown delta base')) baserev = self.rev(deltabase) # start, size, full unc. size, base (unused), link, p1, p2, node e = (revlog.offset_type(start, 0), size, -1, baserev, link, self.rev(p1), self.rev(p2), node) self.index.insert(-1, e) self.nodemap[node] = n self.bundlerevs.add(n) chain = node n += 1 def _chunk(self, rev): # Warning: in case of bundle, the diff is against what we stored as # delta base, not against rev - 1 # XXX: could use some caching if rev <= self.repotiprev: return revlog.revlog._chunk(self, rev) self.bundle.seek(self.start(rev)) return self.bundle.read(self.length(rev)) def revdiff(self, rev1, rev2): """return or calculate a delta between two revisions""" if rev1 > self.repotiprev and rev2 > self.repotiprev: # hot path for bundle revb = self.index[rev2][3] if revb == rev1: return self._chunk(rev2) elif rev1 <= self.repotiprev and rev2 <= self.repotiprev: return revlog.revlog.revdiff(self, rev1, rev2) return mdiff.textdiff(self.revision(self.node(rev1)), self.revision(self.node(rev2))) def revision(self, nodeorrev): """return an uncompressed revision of a given node or revision number. """ if isinstance(nodeorrev, int): rev = nodeorrev node = self.node(rev) else: node = nodeorrev rev = self.rev(node) if node == nullid: return "" text = None chain = [] iterrev = rev # reconstruct the revision if it is from a changegroup while iterrev > self.repotiprev: if self._cache and self._cache[1] == iterrev: text = self._cache[2] break chain.append(iterrev) iterrev = self.index[iterrev][3] if text is None: text = self.baserevision(iterrev) while chain: delta = self._chunk(chain.pop()) text = mdiff.patches(text, [delta]) self._checkhash(text, node, rev) self._cache = (node, rev, text) return text def baserevision(self, nodeorrev): # Revlog subclasses may override 'revision' method to modify format of # content retrieved from revlog. To use bundlerevlog with such class one # needs to override 'baserevision' and make more specific call here. return revlog.revlog.revision(self, nodeorrev) def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): raise NotImplementedError def addgroup(self, revs, linkmapper, transaction): raise NotImplementedError def strip(self, rev, minlink): raise NotImplementedError def checksize(self): raise NotImplementedError class bundlechangelog(bundlerevlog, changelog.changelog): def __init__(self, opener, bundle): changelog.changelog.__init__(self, opener) linkmapper = lambda x: x bundlerevlog.__init__(self, opener, self.indexfile, bundle, linkmapper) def baserevision(self, nodeorrev): # Although changelog doesn't override 'revision' method, some extensions # may replace this class with another that does. Same story with # manifest and filelog classes. # This bypasses filtering on changelog.node() and rev() because we need # revision text of the bundle base even if it is hidden. oldfilter = self.filteredrevs try: self.filteredrevs = () return changelog.changelog.revision(self, nodeorrev) finally: self.filteredrevs = oldfilter class bundlemanifest(bundlerevlog, manifest.manifest): def __init__(self, opener, bundle, linkmapper): manifest.manifest.__init__(self, opener) bundlerevlog.__init__(self, opener, self.indexfile, bundle, linkmapper) def baserevision(self, nodeorrev): return manifest.manifest.revision(self, nodeorrev) class bundlefilelog(bundlerevlog, filelog.filelog): def __init__(self, opener, path, bundle, linkmapper): filelog.filelog.__init__(self, opener, path) bundlerevlog.__init__(self, opener, self.indexfile, bundle, linkmapper) def baserevision(self, nodeorrev): return filelog.filelog.revision(self, nodeorrev) class bundlepeer(localrepo.localpeer): def canpush(self): return False class bundlephasecache(phases.phasecache): def __init__(self, *args, **kwargs): super(bundlephasecache, self).__init__(*args, **kwargs) if util.safehasattr(self, 'opener'): self.opener = scmutil.readonlyvfs(self.opener) def write(self): raise NotImplementedError def _write(self, fp): raise NotImplementedError def _updateroots(self, phase, newroots, tr): self.phaseroots[phase] = newroots self.invalidate() self.dirty = True class bundlerepository(localrepo.localrepository): def __init__(self, ui, path, bundlename): self._tempparent = None try: localrepo.localrepository.__init__(self, ui, path) except error.RepoError: self._tempparent = tempfile.mkdtemp() localrepo.instance(ui, self._tempparent, 1) localrepo.localrepository.__init__(self, ui, self._tempparent) self.ui.setconfig('phases', 'publish', False, 'bundlerepo') if path: self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename else: self._url = 'bundle:' + bundlename self.tempfile = None f = util.posixfile(bundlename, "rb") self.bundlefile = self.bundle = exchange.readbundle(ui, f, bundlename) if self.bundle.compressed(): fdtemp, temp = self.vfs.mkstemp(prefix="hg-bundle-", suffix=".hg10un") self.tempfile = temp fptemp = os.fdopen(fdtemp, 'wb') try: fptemp.write("HG10UN") while True: chunk = self.bundle.read(2**18) if not chunk: break fptemp.write(chunk) finally: fptemp.close() f = self.vfs.open(self.tempfile, mode="rb") self.bundlefile = self.bundle = exchange.readbundle(ui, f, bundlename, self.vfs) if isinstance(self.bundle, bundle2.unbundle20): cgparts = [part for part in self.bundle.iterparts() if (part.type == 'changegroup') and (part.params.get('version', '01') in changegroup.packermap)] if not cgparts: raise util.Abort('No changegroups found') version = cgparts[0].params.get('version', '01') cgparts = [p for p in cgparts if p.params.get('version', '01') == version] if len(cgparts) > 1: raise NotImplementedError("Can't process multiple changegroups") part = cgparts[0] part.seek(0) self.bundle = changegroup.packermap[version][1](part, 'UN') # dict with the mapping 'filename' -> position in the bundle self.bundlefilespos = {} self.firstnewrev = self.changelog.repotiprev + 1 phases.retractboundary(self, None, phases.draft, [ctx.node() for ctx in self[self.firstnewrev:]]) @localrepo.unfilteredpropertycache def _phasecache(self): return bundlephasecache(self, self._phasedefaults) @localrepo.unfilteredpropertycache def changelog(self): # consume the header if it exists self.bundle.changelogheader() c = bundlechangelog(self.svfs, self.bundle) self.manstart = self.bundle.tell() return c @localrepo.unfilteredpropertycache def manifest(self): self.bundle.seek(self.manstart) # consume the header if it exists self.bundle.manifestheader() m = bundlemanifest(self.svfs, self.bundle, self.changelog.rev) self.filestart = self.bundle.tell() return m @localrepo.unfilteredpropertycache def manstart(self): self.changelog return self.manstart @localrepo.unfilteredpropertycache def filestart(self): self.manifest return self.filestart def url(self): return self._url def file(self, f): if not self.bundlefilespos: self.bundle.seek(self.filestart) while True: chunkdata = self.bundle.filelogheader() if not chunkdata: break fname = chunkdata['filename'] self.bundlefilespos[fname] = self.bundle.tell() while True: c = self.bundle.deltachunk(None) if not c: break if f in self.bundlefilespos: self.bundle.seek(self.bundlefilespos[f]) return bundlefilelog(self.svfs, f, self.bundle, self.changelog.rev) else: return filelog.filelog(self.svfs, f) def close(self): """Close assigned bundle file immediately.""" self.bundlefile.close() if self.tempfile is not None: self.vfs.unlink(self.tempfile) if self._tempparent: shutil.rmtree(self._tempparent, True) def cancopy(self): return False def peer(self): return bundlepeer(self) def getcwd(self): return os.getcwd() # always outside the repo def instance(ui, path, create): if create: raise util.Abort(_('cannot create new bundle repository')) parentpath = ui.config("bundle", "mainreporoot", "") if not parentpath: # try to find the correct path to the working directory repo parentpath = cmdutil.findrepo(os.getcwd()) if parentpath is None: parentpath = '' if parentpath: # Try to make the full path relative so we get a nice, short URL. # In particular, we don't want temp dir names in test outputs. cwd = os.getcwd() if parentpath == cwd: parentpath = '' else: cwd = pathutil.normasprefix(cwd) if parentpath.startswith(cwd): parentpath = parentpath[len(cwd):] u = util.url(path) path = u.localpath() if u.scheme == 'bundle': s = path.split("+", 1) if len(s) == 1: repopath, bundlename = parentpath, s[0] else: repopath, bundlename = s else: repopath, bundlename = parentpath, path return bundlerepository(ui, repopath, bundlename) class bundletransactionmanager(object): def transaction(self): return None def close(self): raise NotImplementedError def release(self): raise NotImplementedError def getremotechanges(ui, repo, other, onlyheads=None, bundlename=None, force=False): '''obtains a bundle of changes incoming from other "onlyheads" restricts the returned changes to those reachable from the specified heads. "bundlename", if given, stores the bundle to this file path permanently; otherwise it's stored to a temp file and gets deleted again when you call the returned "cleanupfn". "force" indicates whether to proceed on unrelated repos. Returns a tuple (local, csets, cleanupfn): "local" is a local repo from which to obtain the actual incoming changesets; it is a bundlerepo for the obtained bundle when the original "other" is remote. "csets" lists the incoming changeset node ids. "cleanupfn" must be called without arguments when you're done processing the changes; it closes both the original "other" and the one returned here. ''' tmp = discovery.findcommonincoming(repo, other, heads=onlyheads, force=force) common, incoming, rheads = tmp if not incoming: try: if bundlename: os.unlink(bundlename) except OSError: pass return repo, [], other.close commonset = set(common) rheads = [x for x in rheads if x not in commonset] bundle = None bundlerepo = None localrepo = other.local() if bundlename or not localrepo: # create a bundle (uncompressed if other repo is not local) if other.capable('getbundle'): cg = other.getbundle('incoming', common=common, heads=rheads) elif onlyheads is None and not other.capable('changegroupsubset'): # compat with older servers when pulling all remote heads cg = other.changegroup(incoming, "incoming") rheads = None else: cg = other.changegroupsubset(incoming, rheads, 'incoming') if localrepo: bundletype = "HG10BZ" else: bundletype = "HG10UN" fname = bundle = changegroup.writebundle(ui, cg, bundlename, bundletype) # keep written bundle? if bundlename: bundle = None if not localrepo: # use the created uncompressed bundlerepo localrepo = bundlerepo = bundlerepository(repo.baseui, repo.root, fname) # this repo contains local and other now, so filter out local again common = repo.heads() if localrepo: # Part of common may be remotely filtered # So use an unfiltered version # The discovery process probably need cleanup to avoid that localrepo = localrepo.unfiltered() csets = localrepo.changelog.findmissing(common, rheads) if bundlerepo: reponodes = [ctx.node() for ctx in bundlerepo[bundlerepo.firstnewrev:]] remotephases = other.listkeys('phases') pullop = exchange.pulloperation(bundlerepo, other, heads=reponodes) pullop.trmanager = bundletransactionmanager() exchange._pullapplyphases(pullop, remotephases) def cleanup(): if bundlerepo: bundlerepo.close() if bundle: os.unlink(bundle) other.close() return (localrepo, csets, cleanup)