Mercurial > hg
view mercurial/bundlerepo.py @ 14077:c285bdb0572a
util.url: copy urllib.unquote() into util to improve startup times
The ui class uses util.hasscheme() in a couple of places, causing hg
to import urllib even when it doesn't need to. This copies
urllib.unquote() to avoid that import.
perfstartup time before the URL refactoring (8796fb6af67e):
! wall 0.050692 comb 0.000000 user 0.000000 sys 0.000000 (best of 100)
before this change:
! wall 0.064742 comb 0.000000 user 0.000000 sys 0.000000 (best of 100)
after this change:
! wall 0.052126 comb 0.000000 user 0.000000 sys 0.000000 (best of 100
author | Brodie Rao <brodie@bitheap.org> |
---|---|
date | Sat, 30 Apr 2011 09:43:23 -0700 |
parents | 924c82157d46 |
children | cb91ea6af733 |
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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, struct, tempfile, shutil import changegroup, util, mdiff, discovery import localrepo, changelog, manifest, filelog, revlog, error class bundlerevlog(revlog.revlog): def __init__(self, opener, indexfile, bundle, linkmapper=None): # 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), to differentiate a # rev in the bundle and from a rev in the revlog, we check # len(index[r]). If the tuple is bigger than 7, it is a bundle # (it is bigger since we store the node to which the delta is) # revlog.revlog.__init__(self, opener, indexfile) self.bundle = bundle self.basemap = {} def chunkpositer(): while 1: chunk = bundle.chunk() if not chunk: break pos = bundle.tell() yield chunk, pos - len(chunk) n = len(self) prev = None for chunk, start in chunkpositer(): size = len(chunk) if size < 80: raise util.Abort(_("invalid changegroup")) start += 80 size -= 80 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80]) if node in self.nodemap: prev = node continue for p in (p1, p2): if not p in self.nodemap: raise error.LookupError(p, self.indexfile, _("unknown parent")) if linkmapper is None: link = n else: link = linkmapper(cs) if not prev: prev = p1 # start, size, full unc. size, base (unused), link, p1, p2, node e = (revlog.offset_type(start, 0), size, -1, -1, link, self.rev(p1), self.rev(p2), node) self.basemap[n] = prev self.index.insert(-1, e) self.nodemap[node] = n prev = node n += 1 def inbundle(self, rev): """is rev from the bundle""" if rev < 0: return False return rev in self.basemap def bundlebase(self, rev): return self.basemap[rev] def _chunk(self, rev): # Warning: in case of bundle, the diff is against bundlebase, # not against rev - 1 # XXX: could use some caching if not self.inbundle(rev): 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 self.inbundle(rev1) and self.inbundle(rev2): # hot path for bundle revb = self.rev(self.bundlebase(rev2)) if revb == rev1: return self._chunk(rev2) elif not self.inbundle(rev1) and not self.inbundle(rev2): return revlog.revlog.revdiff(self, rev1, rev2) return mdiff.textdiff(self.revision(self.node(rev1)), self.revision(self.node(rev2))) def revision(self, node): """return an uncompressed revision of a given""" if node == nullid: return "" text = None chain = [] iter_node = node rev = self.rev(iter_node) # reconstruct the revision if it is from a changegroup while self.inbundle(rev): if self._cache and self._cache[0] == iter_node: text = self._cache[2] break chain.append(rev) iter_node = self.bundlebase(rev) rev = self.rev(iter_node) if text is None: text = revlog.revlog.revision(self, iter_node) while chain: delta = self._chunk(chain.pop()) text = mdiff.patches(text, [delta]) p1, p2 = self.parents(node) if node != revlog.hash(text, p1, p2): raise error.RevlogError(_("integrity check failed on %s:%d") % (self.datafile, self.rev(node))) self._cache = (node, self.rev(node), text) return text 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) bundlerevlog.__init__(self, opener, self.indexfile, bundle) class bundlemanifest(bundlerevlog, manifest.manifest): def __init__(self, opener, bundle, linkmapper): manifest.manifest.__init__(self, opener) bundlerevlog.__init__(self, opener, self.indexfile, bundle, linkmapper) 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) 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) if path: self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename else: self._url = 'bundle:' + bundlename self.tempfile = None f = util.posixfile(bundlename, "rb") self.bundle = changegroup.readbundle(f, bundlename) if self.bundle.compressed(): fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-", suffix=".hg10un", dir=self.path) self.tempfile = temp fptemp = os.fdopen(fdtemp, 'wb') try: fptemp.write("HG10UN") while 1: chunk = self.bundle.read(2**18) if not chunk: break fptemp.write(chunk) finally: fptemp.close() f = util.posixfile(self.tempfile, "rb") self.bundle = changegroup.readbundle(f, bundlename) # dict with the mapping 'filename' -> position in the bundle self.bundlefilespos = {} @util.propertycache def changelog(self): c = bundlechangelog(self.sopener, self.bundle) self.manstart = self.bundle.tell() return c @util.propertycache def manifest(self): self.bundle.seek(self.manstart) m = bundlemanifest(self.sopener, self.bundle, self.changelog.rev) self.filestart = self.bundle.tell() return m @util.propertycache def manstart(self): self.changelog return self.manstart @util.propertycache 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 1: chunk = self.bundle.chunk() if not chunk: break self.bundlefilespos[chunk] = self.bundle.tell() while 1: c = self.bundle.chunk() if not c: break if f[0] == '/': f = f[1:] if f in self.bundlefilespos: self.bundle.seek(self.bundlefilespos[f]) return bundlefilelog(self.sopener, f, self.bundle, self.changelog.rev) else: return filelog.filelog(self.sopener, f) def close(self): """Close assigned bundle file immediately.""" self.bundle.close() if self.tempfile is not None: os.unlink(self.tempfile) if self._tempparent: shutil.rmtree(self._tempparent, True) def cancopy(self): return False 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 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 = os.path.join(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) def getremotechanges(ui, repo, other, revs=None, bundlename=None, force=False): tmp = discovery.findcommonincoming(repo, other, heads=revs, force=force) common, incoming, rheads = tmp if not incoming: try: os.unlink(bundlename) except OSError: pass return other, None, None, None bundle = None if bundlename or not other.local(): # create a bundle (uncompressed if other repo is not local) if revs is None and other.capable('changegroupsubset'): revs = rheads if other.capable('getbundle'): cg = other.getbundle('incoming', common=common, heads=revs) elif revs is None: cg = other.changegroup(incoming, "incoming") else: cg = other.changegroupsubset(incoming, revs, 'incoming') bundletype = other.local() and "HG10BZ" or "HG10UN" fname = bundle = changegroup.writebundle(cg, bundlename, bundletype) # keep written bundle? if bundlename: bundle = None if not other.local(): # use the created uncompressed bundlerepo other = bundlerepository(ui, repo.root, fname) return (other, common, incoming, bundle)