|
|
# changegroup.py - Mercurial changegroup manipulation functions
|
|
|
#
|
|
|
# Copyright 2006 Matt Mackall <mpm@selenic.com>
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
|
|
|
from __future__ import absolute_import
|
|
|
|
|
|
import os
|
|
|
import struct
|
|
|
import tempfile
|
|
|
import weakref
|
|
|
|
|
|
from .i18n import _
|
|
|
from .node import (
|
|
|
hex,
|
|
|
nullrev,
|
|
|
short,
|
|
|
)
|
|
|
|
|
|
from . import (
|
|
|
dagutil,
|
|
|
discovery,
|
|
|
error,
|
|
|
mdiff,
|
|
|
phases,
|
|
|
pycompat,
|
|
|
util,
|
|
|
)
|
|
|
|
|
|
_CHANGEGROUPV1_DELTA_HEADER = "20s20s20s20s"
|
|
|
_CHANGEGROUPV2_DELTA_HEADER = "20s20s20s20s20s"
|
|
|
_CHANGEGROUPV3_DELTA_HEADER = ">20s20s20s20s20sH"
|
|
|
|
|
|
def readexactly(stream, n):
|
|
|
'''read n bytes from stream.read and abort if less was available'''
|
|
|
s = stream.read(n)
|
|
|
if len(s) < n:
|
|
|
raise error.Abort(_("stream ended unexpectedly"
|
|
|
" (got %d bytes, expected %d)")
|
|
|
% (len(s), n))
|
|
|
return s
|
|
|
|
|
|
def getchunk(stream):
|
|
|
"""return the next chunk from stream as a string"""
|
|
|
d = readexactly(stream, 4)
|
|
|
l = struct.unpack(">l", d)[0]
|
|
|
if l <= 4:
|
|
|
if l:
|
|
|
raise error.Abort(_("invalid chunk length %d") % l)
|
|
|
return ""
|
|
|
return readexactly(stream, l - 4)
|
|
|
|
|
|
def chunkheader(length):
|
|
|
"""return a changegroup chunk header (string)"""
|
|
|
return struct.pack(">l", length + 4)
|
|
|
|
|
|
def closechunk():
|
|
|
"""return a changegroup chunk header (string) for a zero-length chunk"""
|
|
|
return struct.pack(">l", 0)
|
|
|
|
|
|
def combineresults(results):
|
|
|
"""logic to combine 0 or more addchangegroup results into one"""
|
|
|
changedheads = 0
|
|
|
result = 1
|
|
|
for ret in results:
|
|
|
# If any changegroup result is 0, return 0
|
|
|
if ret == 0:
|
|
|
result = 0
|
|
|
break
|
|
|
if ret < -1:
|
|
|
changedheads += ret + 1
|
|
|
elif ret > 1:
|
|
|
changedheads += ret - 1
|
|
|
if changedheads > 0:
|
|
|
result = 1 + changedheads
|
|
|
elif changedheads < 0:
|
|
|
result = -1 + changedheads
|
|
|
return result
|
|
|
|
|
|
def writechunks(ui, chunks, filename, vfs=None):
|
|
|
"""Write chunks to a file and return its filename.
|
|
|
|
|
|
The stream is assumed to be a bundle file.
|
|
|
Existing files will not be overwritten.
|
|
|
If no filename is specified, a temporary file is created.
|
|
|
"""
|
|
|
fh = None
|
|
|
cleanup = None
|
|
|
try:
|
|
|
if filename:
|
|
|
if vfs:
|
|
|
fh = vfs.open(filename, "wb")
|
|
|
else:
|
|
|
# Increase default buffer size because default is usually
|
|
|
# small (4k is common on Linux).
|
|
|
fh = open(filename, "wb", 131072)
|
|
|
else:
|
|
|
fd, filename = tempfile.mkstemp(prefix="hg-bundle-", suffix=".hg")
|
|
|
fh = os.fdopen(fd, pycompat.sysstr("wb"))
|
|
|
cleanup = filename
|
|
|
for c in chunks:
|
|
|
fh.write(c)
|
|
|
cleanup = None
|
|
|
return filename
|
|
|
finally:
|
|
|
if fh is not None:
|
|
|
fh.close()
|
|
|
if cleanup is not None:
|
|
|
if filename and vfs:
|
|
|
vfs.unlink(cleanup)
|
|
|
else:
|
|
|
os.unlink(cleanup)
|
|
|
|
|
|
class cg1unpacker(object):
|
|
|
"""Unpacker for cg1 changegroup streams.
|
|
|
|
|
|
A changegroup unpacker handles the framing of the revision data in
|
|
|
the wire format. Most consumers will want to use the apply()
|
|
|
method to add the changes from the changegroup to a repository.
|
|
|
|
|
|
If you're forwarding a changegroup unmodified to another consumer,
|
|
|
use getchunks(), which returns an iterator of changegroup
|
|
|
chunks. This is mostly useful for cases where you need to know the
|
|
|
data stream has ended by observing the end of the changegroup.
|
|
|
|
|
|
deltachunk() is useful only if you're applying delta data. Most
|
|
|
consumers should prefer apply() instead.
|
|
|
|
|
|
A few other public methods exist. Those are used only for
|
|
|
bundlerepo and some debug commands - their use is discouraged.
|
|
|
"""
|
|
|
deltaheader = _CHANGEGROUPV1_DELTA_HEADER
|
|
|
deltaheadersize = struct.calcsize(deltaheader)
|
|
|
version = '01'
|
|
|
_grouplistcount = 1 # One list of files after the manifests
|
|
|
|
|
|
def __init__(self, fh, alg, extras=None):
|
|
|
if alg is None:
|
|
|
alg = 'UN'
|
|
|
if alg not in util.compengines.supportedbundletypes:
|
|
|
raise error.Abort(_('unknown stream compression type: %s')
|
|
|
% alg)
|
|
|
if alg == 'BZ':
|
|
|
alg = '_truncatedBZ'
|
|
|
|
|
|
compengine = util.compengines.forbundletype(alg)
|
|
|
self._stream = compengine.decompressorreader(fh)
|
|
|
self._type = alg
|
|
|
self.extras = extras or {}
|
|
|
self.callback = None
|
|
|
|
|
|
# These methods (compressed, read, seek, tell) all appear to only
|
|
|
# be used by bundlerepo, but it's a little hard to tell.
|
|
|
def compressed(self):
|
|
|
return self._type is not None and self._type != 'UN'
|
|
|
def read(self, l):
|
|
|
return self._stream.read(l)
|
|
|
def seek(self, pos):
|
|
|
return self._stream.seek(pos)
|
|
|
def tell(self):
|
|
|
return self._stream.tell()
|
|
|
def close(self):
|
|
|
return self._stream.close()
|
|
|
|
|
|
def _chunklength(self):
|
|
|
d = readexactly(self._stream, 4)
|
|
|
l = struct.unpack(">l", d)[0]
|
|
|
if l <= 4:
|
|
|
if l:
|
|
|
raise error.Abort(_("invalid chunk length %d") % l)
|
|
|
return 0
|
|
|
if self.callback:
|
|
|
self.callback()
|
|
|
return l - 4
|
|
|
|
|
|
def changelogheader(self):
|
|
|
"""v10 does not have a changelog header chunk"""
|
|
|
return {}
|
|
|
|
|
|
def manifestheader(self):
|
|
|
"""v10 does not have a manifest header chunk"""
|
|
|
return {}
|
|
|
|
|
|
def filelogheader(self):
|
|
|
"""return the header of the filelogs chunk, v10 only has the filename"""
|
|
|
l = self._chunklength()
|
|
|
if not l:
|
|
|
return {}
|
|
|
fname = readexactly(self._stream, l)
|
|
|
return {'filename': fname}
|
|
|
|
|
|
def _deltaheader(self, headertuple, prevnode):
|
|
|
node, p1, p2, cs = headertuple
|
|
|
if prevnode is None:
|
|
|
deltabase = p1
|
|
|
else:
|
|
|
deltabase = prevnode
|
|
|
flags = 0
|
|
|
return node, p1, p2, deltabase, cs, flags
|
|
|
|
|
|
def deltachunk(self, prevnode):
|
|
|
l = self._chunklength()
|
|
|
if not l:
|
|
|
return {}
|
|
|
headerdata = readexactly(self._stream, self.deltaheadersize)
|
|
|
header = struct.unpack(self.deltaheader, headerdata)
|
|
|
delta = readexactly(self._stream, l - self.deltaheadersize)
|
|
|
node, p1, p2, deltabase, cs, flags = self._deltaheader(header, prevnode)
|
|
|
return {'node': node, 'p1': p1, 'p2': p2, 'cs': cs,
|
|
|
'deltabase': deltabase, 'delta': delta, 'flags': flags}
|
|
|
|
|
|
def getchunks(self):
|
|
|
"""returns all the chunks contains in the bundle
|
|
|
|
|
|
Used when you need to forward the binary stream to a file or another
|
|
|
network API. To do so, it parse the changegroup data, otherwise it will
|
|
|
block in case of sshrepo because it don't know the end of the stream.
|
|
|
"""
|
|
|
# an empty chunkgroup is the end of the changegroup
|
|
|
# a changegroup has at least 2 chunkgroups (changelog and manifest).
|
|
|
# after that, changegroup versions 1 and 2 have a series of groups
|
|
|
# with one group per file. changegroup 3 has a series of directory
|
|
|
# manifests before the files.
|
|
|
count = 0
|
|
|
emptycount = 0
|
|
|
while emptycount < self._grouplistcount:
|
|
|
empty = True
|
|
|
count += 1
|
|
|
while True:
|
|
|
chunk = getchunk(self)
|
|
|
if not chunk:
|
|
|
if empty and count > 2:
|
|
|
emptycount += 1
|
|
|
break
|
|
|
empty = False
|
|
|
yield chunkheader(len(chunk))
|
|
|
pos = 0
|
|
|
while pos < len(chunk):
|
|
|
next = pos + 2**20
|
|
|
yield chunk[pos:next]
|
|
|
pos = next
|
|
|
yield closechunk()
|
|
|
|
|
|
def _unpackmanifests(self, repo, revmap, trp, prog, numchanges):
|
|
|
# We know that we'll never have more manifests than we had
|
|
|
# changesets.
|
|
|
self.callback = prog(_('manifests'), numchanges)
|
|
|
# no need to check for empty manifest group here:
|
|
|
# if the result of the merge of 1 and 2 is the same in 3 and 4,
|
|
|
# no new manifest will be created and the manifest group will
|
|
|
# be empty during the pull
|
|
|
self.manifestheader()
|
|
|
repo.manifestlog._revlog.addgroup(self, revmap, trp)
|
|
|
repo.ui.progress(_('manifests'), None)
|
|
|
self.callback = None
|
|
|
|
|
|
def apply(self, repo, srctype, url, emptyok=False,
|
|
|
targetphase=phases.draft, expectedtotal=None):
|
|
|
"""Add the changegroup returned by source.read() to this repo.
|
|
|
srctype is a string like 'push', 'pull', or 'unbundle'. url is
|
|
|
the URL of the repo where this changegroup is coming from.
|
|
|
|
|
|
Return an integer summarizing the change to this repo:
|
|
|
- nothing changed or no source: 0
|
|
|
- more heads than before: 1+added heads (2..n)
|
|
|
- fewer heads than before: -1-removed heads (-2..-n)
|
|
|
- number of heads stays the same: 1
|
|
|
"""
|
|
|
repo = repo.unfiltered()
|
|
|
def csmap(x):
|
|
|
repo.ui.debug("add changeset %s\n" % short(x))
|
|
|
return len(cl)
|
|
|
|
|
|
def revmap(x):
|
|
|
return cl.rev(x)
|
|
|
|
|
|
changesets = files = revisions = 0
|
|
|
|
|
|
try:
|
|
|
with repo.transaction("\n".join([srctype,
|
|
|
util.hidepassword(url)])) as tr:
|
|
|
# The transaction could have been created before and already
|
|
|
# carries source information. In this case we use the top
|
|
|
# level data. We overwrite the argument because we need to use
|
|
|
# the top level value (if they exist) in this function.
|
|
|
srctype = tr.hookargs.setdefault('source', srctype)
|
|
|
url = tr.hookargs.setdefault('url', url)
|
|
|
repo.hook('prechangegroup', throw=True, **tr.hookargs)
|
|
|
|
|
|
# write changelog data to temp files so concurrent readers
|
|
|
# will not see an inconsistent view
|
|
|
cl = repo.changelog
|
|
|
cl.delayupdate(tr)
|
|
|
oldheads = set(cl.heads())
|
|
|
|
|
|
trp = weakref.proxy(tr)
|
|
|
# pull off the changeset group
|
|
|
repo.ui.status(_("adding changesets\n"))
|
|
|
clstart = len(cl)
|
|
|
class prog(object):
|
|
|
def __init__(self, step, total):
|
|
|
self._step = step
|
|
|
self._total = total
|
|
|
self._count = 1
|
|
|
def __call__(self):
|
|
|
repo.ui.progress(self._step, self._count,
|
|
|
unit=_('chunks'), total=self._total)
|
|
|
self._count += 1
|
|
|
self.callback = prog(_('changesets'), expectedtotal)
|
|
|
|
|
|
efiles = set()
|
|
|
def onchangelog(cl, node):
|
|
|
efiles.update(cl.readfiles(node))
|
|
|
|
|
|
self.changelogheader()
|
|
|
srccontent = cl.addgroup(self, csmap, trp,
|
|
|
addrevisioncb=onchangelog)
|
|
|
efiles = len(efiles)
|
|
|
|
|
|
if not (srccontent or emptyok):
|
|
|
raise error.Abort(_("received changelog group is empty"))
|
|
|
clend = len(cl)
|
|
|
changesets = clend - clstart
|
|
|
repo.ui.progress(_('changesets'), None)
|
|
|
self.callback = None
|
|
|
|
|
|
# pull off the manifest group
|
|
|
repo.ui.status(_("adding manifests\n"))
|
|
|
self._unpackmanifests(repo, revmap, trp, prog, changesets)
|
|
|
|
|
|
needfiles = {}
|
|
|
if repo.ui.configbool('server', 'validate', default=False):
|
|
|
cl = repo.changelog
|
|
|
ml = repo.manifestlog
|
|
|
# validate incoming csets have their manifests
|
|
|
for cset in xrange(clstart, clend):
|
|
|
mfnode = cl.changelogrevision(cset).manifest
|
|
|
mfest = ml[mfnode].readdelta()
|
|
|
# store file nodes we must see
|
|
|
for f, n in mfest.iteritems():
|
|
|
needfiles.setdefault(f, set()).add(n)
|
|
|
|
|
|
# process the files
|
|
|
repo.ui.status(_("adding file changes\n"))
|
|
|
newrevs, newfiles = _addchangegroupfiles(
|
|
|
repo, self, revmap, trp, efiles, needfiles)
|
|
|
revisions += newrevs
|
|
|
files += newfiles
|
|
|
|
|
|
dh = 0
|
|
|
if oldheads:
|
|
|
heads = cl.heads()
|
|
|
dh = len(heads) - len(oldheads)
|
|
|
for h in heads:
|
|
|
if h not in oldheads and repo[h].closesbranch():
|
|
|
dh -= 1
|
|
|
htext = ""
|
|
|
if dh:
|
|
|
htext = _(" (%+d heads)") % dh
|
|
|
|
|
|
repo.ui.status(_("added %d changesets"
|
|
|
" with %d changes to %d files%s\n")
|
|
|
% (changesets, revisions, files, htext))
|
|
|
repo.invalidatevolatilesets()
|
|
|
|
|
|
if changesets > 0:
|
|
|
if 'node' not in tr.hookargs:
|
|
|
tr.hookargs['node'] = hex(cl.node(clstart))
|
|
|
tr.hookargs['node_last'] = hex(cl.node(clend - 1))
|
|
|
hookargs = dict(tr.hookargs)
|
|
|
else:
|
|
|
hookargs = dict(tr.hookargs)
|
|
|
hookargs['node'] = hex(cl.node(clstart))
|
|
|
hookargs['node_last'] = hex(cl.node(clend - 1))
|
|
|
repo.hook('pretxnchangegroup', throw=True, **hookargs)
|
|
|
|
|
|
added = [cl.node(r) for r in xrange(clstart, clend)]
|
|
|
publishing = repo.publishing()
|
|
|
if srctype in ('push', 'serve'):
|
|
|
# Old servers can not push the boundary themselves.
|
|
|
# New servers won't push the boundary if changeset already
|
|
|
# exists locally as secret
|
|
|
#
|
|
|
# We should not use added here but the list of all change in
|
|
|
# the bundle
|
|
|
if publishing:
|
|
|
phases.advanceboundary(repo, tr, phases.public,
|
|
|
srccontent)
|
|
|
else:
|
|
|
# Those changesets have been pushed from the
|
|
|
# outside, their phases are going to be pushed
|
|
|
# alongside. Therefor `targetphase` is
|
|
|
# ignored.
|
|
|
phases.advanceboundary(repo, tr, phases.draft,
|
|
|
srccontent)
|
|
|
phases.retractboundary(repo, tr, phases.draft, added)
|
|
|
elif srctype != 'strip':
|
|
|
# publishing only alter behavior during push
|
|
|
#
|
|
|
# strip should not touch boundary at all
|
|
|
phases.retractboundary(repo, tr, targetphase, added)
|
|
|
|
|
|
if changesets > 0:
|
|
|
|
|
|
def runhooks():
|
|
|
# These hooks run when the lock releases, not when the
|
|
|
# transaction closes. So it's possible for the changelog
|
|
|
# to have changed since we last saw it.
|
|
|
if clstart >= len(repo):
|
|
|
return
|
|
|
|
|
|
repo.hook("changegroup", **hookargs)
|
|
|
|
|
|
for n in added:
|
|
|
args = hookargs.copy()
|
|
|
args['node'] = hex(n)
|
|
|
del args['node_last']
|
|
|
repo.hook("incoming", **args)
|
|
|
|
|
|
newheads = [h for h in repo.heads()
|
|
|
if h not in oldheads]
|
|
|
repo.ui.log("incoming",
|
|
|
"%s incoming changes - new heads: %s\n",
|
|
|
len(added),
|
|
|
', '.join([hex(c[:6]) for c in newheads]))
|
|
|
|
|
|
tr.addpostclose('changegroup-runhooks-%020i' % clstart,
|
|
|
lambda tr: repo._afterlock(runhooks))
|
|
|
finally:
|
|
|
repo.ui.flush()
|
|
|
# never return 0 here:
|
|
|
if dh < 0:
|
|
|
return dh - 1
|
|
|
else:
|
|
|
return dh + 1
|
|
|
|
|
|
class cg2unpacker(cg1unpacker):
|
|
|
"""Unpacker for cg2 streams.
|
|
|
|
|
|
cg2 streams add support for generaldelta, so the delta header
|
|
|
format is slightly different. All other features about the data
|
|
|
remain the same.
|
|
|
"""
|
|
|
deltaheader = _CHANGEGROUPV2_DELTA_HEADER
|
|
|
deltaheadersize = struct.calcsize(deltaheader)
|
|
|
version = '02'
|
|
|
|
|
|
def _deltaheader(self, headertuple, prevnode):
|
|
|
node, p1, p2, deltabase, cs = headertuple
|
|
|
flags = 0
|
|
|
return node, p1, p2, deltabase, cs, flags
|
|
|
|
|
|
class cg3unpacker(cg2unpacker):
|
|
|
"""Unpacker for cg3 streams.
|
|
|
|
|
|
cg3 streams add support for exchanging treemanifests and revlog
|
|
|
flags. It adds the revlog flags to the delta header and an empty chunk
|
|
|
separating manifests and files.
|
|
|
"""
|
|
|
deltaheader = _CHANGEGROUPV3_DELTA_HEADER
|
|
|
deltaheadersize = struct.calcsize(deltaheader)
|
|
|
version = '03'
|
|
|
_grouplistcount = 2 # One list of manifests and one list of files
|
|
|
|
|
|
def _deltaheader(self, headertuple, prevnode):
|
|
|
node, p1, p2, deltabase, cs, flags = headertuple
|
|
|
return node, p1, p2, deltabase, cs, flags
|
|
|
|
|
|
def _unpackmanifests(self, repo, revmap, trp, prog, numchanges):
|
|
|
super(cg3unpacker, self)._unpackmanifests(repo, revmap, trp, prog,
|
|
|
numchanges)
|
|
|
for chunkdata in iter(self.filelogheader, {}):
|
|
|
# If we get here, there are directory manifests in the changegroup
|
|
|
d = chunkdata["filename"]
|
|
|
repo.ui.debug("adding %s revisions\n" % d)
|
|
|
dirlog = repo.manifestlog._revlog.dirlog(d)
|
|
|
if not dirlog.addgroup(self, revmap, trp):
|
|
|
raise error.Abort(_("received dir revlog group is empty"))
|
|
|
|
|
|
class headerlessfixup(object):
|
|
|
def __init__(self, fh, h):
|
|
|
self._h = h
|
|
|
self._fh = fh
|
|
|
def read(self, n):
|
|
|
if self._h:
|
|
|
d, self._h = self._h[:n], self._h[n:]
|
|
|
if len(d) < n:
|
|
|
d += readexactly(self._fh, n - len(d))
|
|
|
return d
|
|
|
return readexactly(self._fh, n)
|
|
|
|
|
|
class cg1packer(object):
|
|
|
deltaheader = _CHANGEGROUPV1_DELTA_HEADER
|
|
|
version = '01'
|
|
|
def __init__(self, repo):
|
|
|
"""Given a source repo, construct a bundler.
|
|
|
"""
|
|
|
# experimental config: bundle.reorder
|
|
|
reorder = repo.ui.config('bundle', 'reorder', 'auto')
|
|
|
if reorder == 'auto':
|
|
|
reorder = None
|
|
|
else:
|
|
|
reorder = util.parsebool(reorder)
|
|
|
self._repo = repo
|
|
|
self._reorder = reorder
|
|
|
self._progress = repo.ui.progress
|
|
|
if self._repo.ui.verbose and not self._repo.ui.debugflag:
|
|
|
self._verbosenote = self._repo.ui.note
|
|
|
else:
|
|
|
self._verbosenote = lambda s: None
|
|
|
|
|
|
def close(self):
|
|
|
return closechunk()
|
|
|
|
|
|
def fileheader(self, fname):
|
|
|
return chunkheader(len(fname)) + fname
|
|
|
|
|
|
# Extracted both for clarity and for overriding in extensions.
|
|
|
def _sortgroup(self, revlog, nodelist, lookup):
|
|
|
"""Sort nodes for change group and turn them into revnums."""
|
|
|
# for generaldelta revlogs, we linearize the revs; this will both be
|
|
|
# much quicker and generate a much smaller bundle
|
|
|
if (revlog._generaldelta and self._reorder is None) or self._reorder:
|
|
|
dag = dagutil.revlogdag(revlog)
|
|
|
return dag.linearize(set(revlog.rev(n) for n in nodelist))
|
|
|
else:
|
|
|
return sorted([revlog.rev(n) for n in nodelist])
|
|
|
|
|
|
def group(self, nodelist, revlog, lookup, units=None):
|
|
|
"""Calculate a delta group, yielding a sequence of changegroup chunks
|
|
|
(strings).
|
|
|
|
|
|
Given a list of changeset revs, return a set of deltas and
|
|
|
metadata corresponding to nodes. The first delta is
|
|
|
first parent(nodelist[0]) -> nodelist[0], the receiver is
|
|
|
guaranteed to have this parent as it has all history before
|
|
|
these changesets. In the case firstparent is nullrev the
|
|
|
changegroup starts with a full revision.
|
|
|
|
|
|
If units is not None, progress detail will be generated, units specifies
|
|
|
the type of revlog that is touched (changelog, manifest, etc.).
|
|
|
"""
|
|
|
# if we don't have any revisions touched by these changesets, bail
|
|
|
if len(nodelist) == 0:
|
|
|
yield self.close()
|
|
|
return
|
|
|
|
|
|
revs = self._sortgroup(revlog, nodelist, lookup)
|
|
|
|
|
|
# add the parent of the first rev
|
|
|
p = revlog.parentrevs(revs[0])[0]
|
|
|
revs.insert(0, p)
|
|
|
|
|
|
# build deltas
|
|
|
total = len(revs) - 1
|
|
|
msgbundling = _('bundling')
|
|
|
for r in xrange(len(revs) - 1):
|
|
|
if units is not None:
|
|
|
self._progress(msgbundling, r + 1, unit=units, total=total)
|
|
|
prev, curr = revs[r], revs[r + 1]
|
|
|
linknode = lookup(revlog.node(curr))
|
|
|
for c in self.revchunk(revlog, curr, prev, linknode):
|
|
|
yield c
|
|
|
|
|
|
if units is not None:
|
|
|
self._progress(msgbundling, None)
|
|
|
yield self.close()
|
|
|
|
|
|
# filter any nodes that claim to be part of the known set
|
|
|
def prune(self, revlog, missing, commonrevs):
|
|
|
rr, rl = revlog.rev, revlog.linkrev
|
|
|
return [n for n in missing if rl(rr(n)) not in commonrevs]
|
|
|
|
|
|
def _packmanifests(self, dir, mfnodes, lookuplinknode):
|
|
|
"""Pack flat manifests into a changegroup stream."""
|
|
|
assert not dir
|
|
|
for chunk in self.group(mfnodes, self._repo.manifestlog._revlog,
|
|
|
lookuplinknode, units=_('manifests')):
|
|
|
yield chunk
|
|
|
|
|
|
def _manifestsdone(self):
|
|
|
return ''
|
|
|
|
|
|
def generate(self, commonrevs, clnodes, fastpathlinkrev, source):
|
|
|
'''yield a sequence of changegroup chunks (strings)'''
|
|
|
repo = self._repo
|
|
|
cl = repo.changelog
|
|
|
|
|
|
clrevorder = {}
|
|
|
mfs = {} # needed manifests
|
|
|
fnodes = {} # needed file nodes
|
|
|
changedfiles = set()
|
|
|
|
|
|
# Callback for the changelog, used to collect changed files and manifest
|
|
|
# nodes.
|
|
|
# Returns the linkrev node (identity in the changelog case).
|
|
|
def lookupcl(x):
|
|
|
c = cl.read(x)
|
|
|
clrevorder[x] = len(clrevorder)
|
|
|
n = c[0]
|
|
|
# record the first changeset introducing this manifest version
|
|
|
mfs.setdefault(n, x)
|
|
|
# Record a complete list of potentially-changed files in
|
|
|
# this manifest.
|
|
|
changedfiles.update(c[3])
|
|
|
return x
|
|
|
|
|
|
self._verbosenote(_('uncompressed size of bundle content:\n'))
|
|
|
size = 0
|
|
|
for chunk in self.group(clnodes, cl, lookupcl, units=_('changesets')):
|
|
|
size += len(chunk)
|
|
|
yield chunk
|
|
|
self._verbosenote(_('%8.i (changelog)\n') % size)
|
|
|
|
|
|
# We need to make sure that the linkrev in the changegroup refers to
|
|
|
# the first changeset that introduced the manifest or file revision.
|
|
|
# The fastpath is usually safer than the slowpath, because the filelogs
|
|
|
# are walked in revlog order.
|
|
|
#
|
|
|
# When taking the slowpath with reorder=None and the manifest revlog
|
|
|
# uses generaldelta, the manifest may be walked in the "wrong" order.
|
|
|
# Without 'clrevorder', we would get an incorrect linkrev (see fix in
|
|
|
# cc0ff93d0c0c).
|
|
|
#
|
|
|
# When taking the fastpath, we are only vulnerable to reordering
|
|
|
# of the changelog itself. The changelog never uses generaldelta, so
|
|
|
# it is only reordered when reorder=True. To handle this case, we
|
|
|
# simply take the slowpath, which already has the 'clrevorder' logic.
|
|
|
# This was also fixed in cc0ff93d0c0c.
|
|
|
fastpathlinkrev = fastpathlinkrev and not self._reorder
|
|
|
# Treemanifests don't work correctly with fastpathlinkrev
|
|
|
# either, because we don't discover which directory nodes to
|
|
|
# send along with files. This could probably be fixed.
|
|
|
fastpathlinkrev = fastpathlinkrev and (
|
|
|
'treemanifest' not in repo.requirements)
|
|
|
|
|
|
for chunk in self.generatemanifests(commonrevs, clrevorder,
|
|
|
fastpathlinkrev, mfs, fnodes):
|
|
|
yield chunk
|
|
|
mfs.clear()
|
|
|
clrevs = set(cl.rev(x) for x in clnodes)
|
|
|
|
|
|
if not fastpathlinkrev:
|
|
|
def linknodes(unused, fname):
|
|
|
return fnodes.get(fname, {})
|
|
|
else:
|
|
|
cln = cl.node
|
|
|
def linknodes(filerevlog, fname):
|
|
|
llr = filerevlog.linkrev
|
|
|
fln = filerevlog.node
|
|
|
revs = ((r, llr(r)) for r in filerevlog)
|
|
|
return dict((fln(r), cln(lr)) for r, lr in revs if lr in clrevs)
|
|
|
|
|
|
for chunk in self.generatefiles(changedfiles, linknodes, commonrevs,
|
|
|
source):
|
|
|
yield chunk
|
|
|
|
|
|
yield self.close()
|
|
|
|
|
|
if clnodes:
|
|
|
repo.hook('outgoing', node=hex(clnodes[0]), source=source)
|
|
|
|
|
|
def generatemanifests(self, commonrevs, clrevorder, fastpathlinkrev, mfs,
|
|
|
fnodes):
|
|
|
repo = self._repo
|
|
|
mfl = repo.manifestlog
|
|
|
dirlog = mfl._revlog.dirlog
|
|
|
tmfnodes = {'': mfs}
|
|
|
|
|
|
# Callback for the manifest, used to collect linkrevs for filelog
|
|
|
# revisions.
|
|
|
# Returns the linkrev node (collected in lookupcl).
|
|
|
def makelookupmflinknode(dir):
|
|
|
if fastpathlinkrev:
|
|
|
assert not dir
|
|
|
return mfs.__getitem__
|
|
|
|
|
|
def lookupmflinknode(x):
|
|
|
"""Callback for looking up the linknode for manifests.
|
|
|
|
|
|
Returns the linkrev node for the specified manifest.
|
|
|
|
|
|
SIDE EFFECT:
|
|
|
|
|
|
1) fclnodes gets populated with the list of relevant
|
|
|
file nodes if we're not using fastpathlinkrev
|
|
|
2) When treemanifests are in use, collects treemanifest nodes
|
|
|
to send
|
|
|
|
|
|
Note that this means manifests must be completely sent to
|
|
|
the client before you can trust the list of files and
|
|
|
treemanifests to send.
|
|
|
"""
|
|
|
clnode = tmfnodes[dir][x]
|
|
|
mdata = mfl.get(dir, x).readfast(shallow=True)
|
|
|
for p, n, fl in mdata.iterentries():
|
|
|
if fl == 't': # subdirectory manifest
|
|
|
subdir = dir + p + '/'
|
|
|
tmfclnodes = tmfnodes.setdefault(subdir, {})
|
|
|
tmfclnode = tmfclnodes.setdefault(n, clnode)
|
|
|
if clrevorder[clnode] < clrevorder[tmfclnode]:
|
|
|
tmfclnodes[n] = clnode
|
|
|
else:
|
|
|
f = dir + p
|
|
|
fclnodes = fnodes.setdefault(f, {})
|
|
|
fclnode = fclnodes.setdefault(n, clnode)
|
|
|
if clrevorder[clnode] < clrevorder[fclnode]:
|
|
|
fclnodes[n] = clnode
|
|
|
return clnode
|
|
|
return lookupmflinknode
|
|
|
|
|
|
size = 0
|
|
|
while tmfnodes:
|
|
|
dir = min(tmfnodes)
|
|
|
nodes = tmfnodes[dir]
|
|
|
prunednodes = self.prune(dirlog(dir), nodes, commonrevs)
|
|
|
if not dir or prunednodes:
|
|
|
for x in self._packmanifests(dir, prunednodes,
|
|
|
makelookupmflinknode(dir)):
|
|
|
size += len(x)
|
|
|
yield x
|
|
|
del tmfnodes[dir]
|
|
|
self._verbosenote(_('%8.i (manifests)\n') % size)
|
|
|
yield self._manifestsdone()
|
|
|
|
|
|
# The 'source' parameter is useful for extensions
|
|
|
def generatefiles(self, changedfiles, linknodes, commonrevs, source):
|
|
|
repo = self._repo
|
|
|
progress = self._progress
|
|
|
msgbundling = _('bundling')
|
|
|
|
|
|
total = len(changedfiles)
|
|
|
# for progress output
|
|
|
msgfiles = _('files')
|
|
|
for i, fname in enumerate(sorted(changedfiles)):
|
|
|
filerevlog = repo.file(fname)
|
|
|
if not filerevlog:
|
|
|
raise error.Abort(_("empty or missing revlog for %s") % fname)
|
|
|
|
|
|
linkrevnodes = linknodes(filerevlog, fname)
|
|
|
# Lookup for filenodes, we collected the linkrev nodes above in the
|
|
|
# fastpath case and with lookupmf in the slowpath case.
|
|
|
def lookupfilelog(x):
|
|
|
return linkrevnodes[x]
|
|
|
|
|
|
filenodes = self.prune(filerevlog, linkrevnodes, commonrevs)
|
|
|
if filenodes:
|
|
|
progress(msgbundling, i + 1, item=fname, unit=msgfiles,
|
|
|
total=total)
|
|
|
h = self.fileheader(fname)
|
|
|
size = len(h)
|
|
|
yield h
|
|
|
for chunk in self.group(filenodes, filerevlog, lookupfilelog):
|
|
|
size += len(chunk)
|
|
|
yield chunk
|
|
|
self._verbosenote(_('%8.i %s\n') % (size, fname))
|
|
|
progress(msgbundling, None)
|
|
|
|
|
|
def deltaparent(self, revlog, rev, p1, p2, prev):
|
|
|
return prev
|
|
|
|
|
|
def revchunk(self, revlog, rev, prev, linknode):
|
|
|
node = revlog.node(rev)
|
|
|
p1, p2 = revlog.parentrevs(rev)
|
|
|
base = self.deltaparent(revlog, rev, p1, p2, prev)
|
|
|
|
|
|
prefix = ''
|
|
|
if revlog.iscensored(base) or revlog.iscensored(rev):
|
|
|
try:
|
|
|
delta = revlog.revision(node, raw=True)
|
|
|
except error.CensoredNodeError as e:
|
|
|
delta = e.tombstone
|
|
|
if base == nullrev:
|
|
|
prefix = mdiff.trivialdiffheader(len(delta))
|
|
|
else:
|
|
|
baselen = revlog.rawsize(base)
|
|
|
prefix = mdiff.replacediffheader(baselen, len(delta))
|
|
|
elif base == nullrev:
|
|
|
delta = revlog.revision(node, raw=True)
|
|
|
prefix = mdiff.trivialdiffheader(len(delta))
|
|
|
else:
|
|
|
delta = revlog.revdiff(base, rev)
|
|
|
p1n, p2n = revlog.parents(node)
|
|
|
basenode = revlog.node(base)
|
|
|
flags = revlog.flags(rev)
|
|
|
meta = self.builddeltaheader(node, p1n, p2n, basenode, linknode, flags)
|
|
|
meta += prefix
|
|
|
l = len(meta) + len(delta)
|
|
|
yield chunkheader(l)
|
|
|
yield meta
|
|
|
yield delta
|
|
|
def builddeltaheader(self, node, p1n, p2n, basenode, linknode, flags):
|
|
|
# do nothing with basenode, it is implicitly the previous one in HG10
|
|
|
# do nothing with flags, it is implicitly 0 for cg1 and cg2
|
|
|
return struct.pack(self.deltaheader, node, p1n, p2n, linknode)
|
|
|
|
|
|
class cg2packer(cg1packer):
|
|
|
version = '02'
|
|
|
deltaheader = _CHANGEGROUPV2_DELTA_HEADER
|
|
|
|
|
|
def __init__(self, repo):
|
|
|
super(cg2packer, self).__init__(repo)
|
|
|
if self._reorder is None:
|
|
|
# Since generaldelta is directly supported by cg2, reordering
|
|
|
# generally doesn't help, so we disable it by default (treating
|
|
|
# bundle.reorder=auto just like bundle.reorder=False).
|
|
|
self._reorder = False
|
|
|
|
|
|
def deltaparent(self, revlog, rev, p1, p2, prev):
|
|
|
dp = revlog.deltaparent(rev)
|
|
|
if dp == nullrev and revlog.storedeltachains:
|
|
|
# Avoid sending full revisions when delta parent is null. Pick prev
|
|
|
# in that case. It's tempting to pick p1 in this case, as p1 will
|
|
|
# be smaller in the common case. However, computing a delta against
|
|
|
# p1 may require resolving the raw text of p1, which could be
|
|
|
# expensive. The revlog caches should have prev cached, meaning
|
|
|
# less CPU for changegroup generation. There is likely room to add
|
|
|
# a flag and/or config option to control this behavior.
|
|
|
return prev
|
|
|
elif dp == nullrev:
|
|
|
# revlog is configured to use full snapshot for a reason,
|
|
|
# stick to full snapshot.
|
|
|
return nullrev
|
|
|
elif dp not in (p1, p2, prev):
|
|
|
# Pick prev when we can't be sure remote has the base revision.
|
|
|
return prev
|
|
|
else:
|
|
|
return dp
|
|
|
|
|
|
def builddeltaheader(self, node, p1n, p2n, basenode, linknode, flags):
|
|
|
# Do nothing with flags, it is implicitly 0 in cg1 and cg2
|
|
|
return struct.pack(self.deltaheader, node, p1n, p2n, basenode, linknode)
|
|
|
|
|
|
class cg3packer(cg2packer):
|
|
|
version = '03'
|
|
|
deltaheader = _CHANGEGROUPV3_DELTA_HEADER
|
|
|
|
|
|
def _packmanifests(self, dir, mfnodes, lookuplinknode):
|
|
|
if dir:
|
|
|
yield self.fileheader(dir)
|
|
|
|
|
|
dirlog = self._repo.manifestlog._revlog.dirlog(dir)
|
|
|
for chunk in self.group(mfnodes, dirlog, lookuplinknode,
|
|
|
units=_('manifests')):
|
|
|
yield chunk
|
|
|
|
|
|
def _manifestsdone(self):
|
|
|
return self.close()
|
|
|
|
|
|
def builddeltaheader(self, node, p1n, p2n, basenode, linknode, flags):
|
|
|
return struct.pack(
|
|
|
self.deltaheader, node, p1n, p2n, basenode, linknode, flags)
|
|
|
|
|
|
_packermap = {'01': (cg1packer, cg1unpacker),
|
|
|
# cg2 adds support for exchanging generaldelta
|
|
|
'02': (cg2packer, cg2unpacker),
|
|
|
# cg3 adds support for exchanging revlog flags and treemanifests
|
|
|
'03': (cg3packer, cg3unpacker),
|
|
|
}
|
|
|
|
|
|
def allsupportedversions(repo):
|
|
|
versions = set(_packermap.keys())
|
|
|
if not (repo.ui.configbool('experimental', 'changegroup3') or
|
|
|
repo.ui.configbool('experimental', 'treemanifest') or
|
|
|
'treemanifest' in repo.requirements):
|
|
|
versions.discard('03')
|
|
|
return versions
|
|
|
|
|
|
# Changegroup versions that can be applied to the repo
|
|
|
def supportedincomingversions(repo):
|
|
|
return allsupportedversions(repo)
|
|
|
|
|
|
# Changegroup versions that can be created from the repo
|
|
|
def supportedoutgoingversions(repo):
|
|
|
versions = allsupportedversions(repo)
|
|
|
if 'treemanifest' in repo.requirements:
|
|
|
# Versions 01 and 02 support only flat manifests and it's just too
|
|
|
# expensive to convert between the flat manifest and tree manifest on
|
|
|
# the fly. Since tree manifests are hashed differently, all of history
|
|
|
# would have to be converted. Instead, we simply don't even pretend to
|
|
|
# support versions 01 and 02.
|
|
|
versions.discard('01')
|
|
|
versions.discard('02')
|
|
|
return versions
|
|
|
|
|
|
def safeversion(repo):
|
|
|
# Finds the smallest version that it's safe to assume clients of the repo
|
|
|
# will support. For example, all hg versions that support generaldelta also
|
|
|
# support changegroup 02.
|
|
|
versions = supportedoutgoingversions(repo)
|
|
|
if 'generaldelta' in repo.requirements:
|
|
|
versions.discard('01')
|
|
|
assert versions
|
|
|
return min(versions)
|
|
|
|
|
|
def getbundler(version, repo):
|
|
|
assert version in supportedoutgoingversions(repo)
|
|
|
return _packermap[version][0](repo)
|
|
|
|
|
|
def getunbundler(version, fh, alg, extras=None):
|
|
|
return _packermap[version][1](fh, alg, extras=extras)
|
|
|
|
|
|
def _changegroupinfo(repo, nodes, source):
|
|
|
if repo.ui.verbose or source == 'bundle':
|
|
|
repo.ui.status(_("%d changesets found\n") % len(nodes))
|
|
|
if repo.ui.debugflag:
|
|
|
repo.ui.debug("list of changesets:\n")
|
|
|
for node in nodes:
|
|
|
repo.ui.debug("%s\n" % hex(node))
|
|
|
|
|
|
def getsubsetraw(repo, outgoing, bundler, source, fastpath=False):
|
|
|
repo = repo.unfiltered()
|
|
|
commonrevs = outgoing.common
|
|
|
csets = outgoing.missing
|
|
|
heads = outgoing.missingheads
|
|
|
# We go through the fast path if we get told to, or if all (unfiltered
|
|
|
# heads have been requested (since we then know there all linkrevs will
|
|
|
# be pulled by the client).
|
|
|
heads.sort()
|
|
|
fastpathlinkrev = fastpath or (
|
|
|
repo.filtername is None and heads == sorted(repo.heads()))
|
|
|
|
|
|
repo.hook('preoutgoing', throw=True, source=source)
|
|
|
_changegroupinfo(repo, csets, source)
|
|
|
return bundler.generate(commonrevs, csets, fastpathlinkrev, source)
|
|
|
|
|
|
def getsubset(repo, outgoing, bundler, source, fastpath=False):
|
|
|
gengroup = getsubsetraw(repo, outgoing, bundler, source, fastpath)
|
|
|
return getunbundler(bundler.version, util.chunkbuffer(gengroup), None,
|
|
|
{'clcount': len(outgoing.missing)})
|
|
|
|
|
|
def changegroupsubset(repo, roots, heads, source, version='01'):
|
|
|
"""Compute a changegroup consisting of all the nodes that are
|
|
|
descendants of any of the roots and ancestors of any of the heads.
|
|
|
Return a chunkbuffer object whose read() method will return
|
|
|
successive changegroup chunks.
|
|
|
|
|
|
It is fairly complex as determining which filenodes and which
|
|
|
manifest nodes need to be included for the changeset to be complete
|
|
|
is non-trivial.
|
|
|
|
|
|
Another wrinkle is doing the reverse, figuring out which changeset in
|
|
|
the changegroup a particular filenode or manifestnode belongs to.
|
|
|
"""
|
|
|
outgoing = discovery.outgoing(repo, missingroots=roots, missingheads=heads)
|
|
|
bundler = getbundler(version, repo)
|
|
|
return getsubset(repo, outgoing, bundler, source)
|
|
|
|
|
|
def getlocalchangegroupraw(repo, source, outgoing, version='01'):
|
|
|
"""Like getbundle, but taking a discovery.outgoing as an argument.
|
|
|
|
|
|
This is only implemented for local repos and reuses potentially
|
|
|
precomputed sets in outgoing. Returns a raw changegroup generator."""
|
|
|
if not outgoing.missing:
|
|
|
return None
|
|
|
bundler = getbundler(version, repo)
|
|
|
return getsubsetraw(repo, outgoing, bundler, source)
|
|
|
|
|
|
def getchangegroup(repo, source, outgoing, version='01'):
|
|
|
"""Like getbundle, but taking a discovery.outgoing as an argument.
|
|
|
|
|
|
This is only implemented for local repos and reuses potentially
|
|
|
precomputed sets in outgoing."""
|
|
|
if not outgoing.missing:
|
|
|
return None
|
|
|
bundler = getbundler(version, repo)
|
|
|
return getsubset(repo, outgoing, bundler, source)
|
|
|
|
|
|
def getlocalchangegroup(repo, *args, **kwargs):
|
|
|
repo.ui.deprecwarn('getlocalchangegroup is deprecated, use getchangegroup',
|
|
|
'4.3')
|
|
|
return getchangegroup(repo, *args, **kwargs)
|
|
|
|
|
|
def changegroup(repo, basenodes, source):
|
|
|
# to avoid a race we use changegroupsubset() (issue1320)
|
|
|
return changegroupsubset(repo, basenodes, repo.heads(), source)
|
|
|
|
|
|
def _addchangegroupfiles(repo, source, revmap, trp, expectedfiles, needfiles):
|
|
|
revisions = 0
|
|
|
files = 0
|
|
|
for chunkdata in iter(source.filelogheader, {}):
|
|
|
files += 1
|
|
|
f = chunkdata["filename"]
|
|
|
repo.ui.debug("adding %s revisions\n" % f)
|
|
|
repo.ui.progress(_('files'), files, unit=_('files'),
|
|
|
total=expectedfiles)
|
|
|
fl = repo.file(f)
|
|
|
o = len(fl)
|
|
|
try:
|
|
|
if not fl.addgroup(source, revmap, trp):
|
|
|
raise error.Abort(_("received file revlog group is empty"))
|
|
|
except error.CensoredBaseError as e:
|
|
|
raise error.Abort(_("received delta base is censored: %s") % e)
|
|
|
revisions += len(fl) - o
|
|
|
if f in needfiles:
|
|
|
needs = needfiles[f]
|
|
|
for new in xrange(o, len(fl)):
|
|
|
n = fl.node(new)
|
|
|
if n in needs:
|
|
|
needs.remove(n)
|
|
|
else:
|
|
|
raise error.Abort(
|
|
|
_("received spurious file revlog entry"))
|
|
|
if not needs:
|
|
|
del needfiles[f]
|
|
|
repo.ui.progress(_('files'), None)
|
|
|
|
|
|
for f, needs in needfiles.iteritems():
|
|
|
fl = repo.file(f)
|
|
|
for n in needs:
|
|
|
try:
|
|
|
fl.rev(n)
|
|
|
except error.LookupError:
|
|
|
raise error.Abort(
|
|
|
_('missing file data for %s:%s - run hg verify') %
|
|
|
(f, hex(n)))
|
|
|
|
|
|
return revisions, files
|
|
|
|
