rebase: mention --rev in the help
This changeset adds a small mention of it in the help to prevent
confusion. This small addition references online help that is easier to
update and improve at release time.
Following Wagner Bruna's advice, this is added in a plain new paragraph
to not invalidate current translation this close to the release.
# 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
import localrepo, changelog, manifest, filelog, revlog, error
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).
#
# basemap is indexed with revisions coming from the bundle, and it
# maps to the revision that is the base of the corresponding delta.
#
# To differentiate a rev in the bundle from a rev in the revlog, we
# check revision against basemap.
opener = scmutil.readonlyvfs(opener)
revlog.revlog.__init__(self, opener, indexfile)
self.bundle = bundle
self.basemap = {} # mapping rev to delta base rev
n = len(self)
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, -1, link,
self.rev(p1), self.rev(p2), node)
self.basemap[n] = baserev
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 self.basemap,
# not against rev - 1
# XXX: could use some caching
if rev not in self.basemap:
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 in self.basemap and rev2 in self.basemap:
# hot path for bundle
revb = self.basemap[rev2]
if revb == rev1:
return self._chunk(rev2)
elif rev1 not in self.basemap and rev2 not in self.basemap:
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 in self.basemap:
if self._cache and self._cache[1] == iterrev:
text = self._cache[2]
break
chain.append(iterrev)
iterrev = self.basemap[iterrev]
if text is None:
text = revlog.revlog.revision(self, 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 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)
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, repo):
filelog.filelog.__init__(self, opener, path)
bundlerevlog.__init__(self, opener, self.indexfile, bundle,
linkmapper)
self._repo = repo
def _file(self, f):
self._repo.file(f)
class bundlepeer(localrepo.localpeer):
def canpush(self):
return False
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)
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 True:
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 = {}
@localrepo.unfilteredpropertycache
def changelog(self):
# consume the header if it exists
self.bundle.changelogheader()
c = bundlechangelog(self.sopener, 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.sopener, 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.sopener, f, self.bundle,
self.changelog.rev, self)
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 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 = 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, 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
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')
bundletype = localrepo and "HG10BZ" or "HG10UN"
fname = bundle = changegroup.writebundle(cg, bundlename, bundletype)
# keep written bundle?
if bundlename:
bundle = None
if not localrepo:
# use the created uncompressed bundlerepo
localrepo = bundlerepo = bundlerepository(ui, repo.root, fname)
# this repo contains local and other now, so filter out local again
common = repo.heads()
csets = localrepo.changelog.findmissing(common, rheads)
def cleanup():
if bundlerepo:
bundlerepo.close()
if bundle:
os.unlink(bundle)
other.close()
return (localrepo, csets, cleanup)