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authorNishanth Amuluru2011-01-11 22:41:51 +0530
committerNishanth Amuluru2011-01-11 22:41:51 +0530
commitb03203c8cb991c16ac8a3d74c8c4078182d0bb48 (patch)
tree7cf13b2deacbfaaec99edb431b83ddd5ea734a52 /eggs/mercurial-1.7.3-py2.6-linux-x86_64.egg/mercurial/bundlerepo.py
parent0c50203cd9eb94b819883c3110922e873f003138 (diff)
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diff --git a/eggs/mercurial-1.7.3-py2.6-linux-x86_64.egg/mercurial/bundlerepo.py b/eggs/mercurial-1.7.3-py2.6-linux-x86_64.egg/mercurial/bundlerepo.py
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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 = open(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 = open(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)
-
- def __del__(self):
- del self.bundle
- 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):]
- path = util.drop_scheme('file', path)
- if path.startswith('bundle:'):
- path = util.drop_scheme('bundle', path)
- 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:
- pass
- return other, 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 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, incoming, bundle)
-
generated by cgit (git 2.34.1) at 2025-03-20 22:33:18 +0000