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# changegroup.py - Mercurial changegroup manipulation functions
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#
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# Copyright 2006 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import os
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import struct
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import weakref
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from .i18n import _
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from .node import (
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hex,
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nullid,
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nullrev,
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short,
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)
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from .thirdparty import (
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attr,
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)
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from . import (
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dagutil,
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error,
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match as matchmod,
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mdiff,
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phases,
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pycompat,
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repository,
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revlog,
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util,
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)
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from .utils import (
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stringutil,
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)
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_CHANGEGROUPV1_DELTA_HEADER = struct.Struct("20s20s20s20s")
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_CHANGEGROUPV2_DELTA_HEADER = struct.Struct("20s20s20s20s20s")
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_CHANGEGROUPV3_DELTA_HEADER = struct.Struct(">20s20s20s20s20sH")
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LFS_REQUIREMENT = 'lfs'
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readexactly = util.readexactly
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def getchunk(stream):
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"""return the next chunk from stream as a string"""
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d = readexactly(stream, 4)
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l = struct.unpack(">l", d)[0]
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if l <= 4:
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if l:
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raise error.Abort(_("invalid chunk length %d") % l)
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return ""
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return readexactly(stream, l - 4)
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def chunkheader(length):
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"""return a changegroup chunk header (string)"""
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return struct.pack(">l", length + 4)
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def closechunk():
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"""return a changegroup chunk header (string) for a zero-length chunk"""
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return struct.pack(">l", 0)
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def _fileheader(path):
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"""Obtain a changegroup chunk header for a named path."""
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return chunkheader(len(path)) + path
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def writechunks(ui, chunks, filename, vfs=None):
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"""Write chunks to a file and return its filename.
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The stream is assumed to be a bundle file.
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Existing files will not be overwritten.
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If no filename is specified, a temporary file is created.
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"""
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fh = None
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cleanup = None
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try:
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if filename:
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if vfs:
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fh = vfs.open(filename, "wb")
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else:
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# Increase default buffer size because default is usually
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# small (4k is common on Linux).
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fh = open(filename, "wb", 131072)
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else:
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fd, filename = pycompat.mkstemp(prefix="hg-bundle-", suffix=".hg")
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fh = os.fdopen(fd, r"wb")
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cleanup = filename
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for c in chunks:
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fh.write(c)
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cleanup = None
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return filename
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finally:
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if fh is not None:
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fh.close()
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if cleanup is not None:
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if filename and vfs:
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vfs.unlink(cleanup)
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else:
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os.unlink(cleanup)
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class cg1unpacker(object):
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"""Unpacker for cg1 changegroup streams.
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A changegroup unpacker handles the framing of the revision data in
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the wire format. Most consumers will want to use the apply()
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method to add the changes from the changegroup to a repository.
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If you're forwarding a changegroup unmodified to another consumer,
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use getchunks(), which returns an iterator of changegroup
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chunks. This is mostly useful for cases where you need to know the
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data stream has ended by observing the end of the changegroup.
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deltachunk() is useful only if you're applying delta data. Most
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consumers should prefer apply() instead.
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A few other public methods exist. Those are used only for
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bundlerepo and some debug commands - their use is discouraged.
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"""
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deltaheader = _CHANGEGROUPV1_DELTA_HEADER
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deltaheadersize = deltaheader.size
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version = '01'
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_grouplistcount = 1 # One list of files after the manifests
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def __init__(self, fh, alg, extras=None):
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if alg is None:
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alg = 'UN'
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if alg not in util.compengines.supportedbundletypes:
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raise error.Abort(_('unknown stream compression type: %s')
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% alg)
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if alg == 'BZ':
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alg = '_truncatedBZ'
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compengine = util.compengines.forbundletype(alg)
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self._stream = compengine.decompressorreader(fh)
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self._type = alg
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self.extras = extras or {}
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self.callback = None
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# These methods (compressed, read, seek, tell) all appear to only
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# be used by bundlerepo, but it's a little hard to tell.
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def compressed(self):
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return self._type is not None and self._type != 'UN'
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def read(self, l):
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return self._stream.read(l)
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def seek(self, pos):
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return self._stream.seek(pos)
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def tell(self):
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return self._stream.tell()
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def close(self):
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return self._stream.close()
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def _chunklength(self):
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d = readexactly(self._stream, 4)
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l = struct.unpack(">l", d)[0]
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if l <= 4:
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if l:
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raise error.Abort(_("invalid chunk length %d") % l)
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return 0
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if self.callback:
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self.callback()
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return l - 4
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def changelogheader(self):
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"""v10 does not have a changelog header chunk"""
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return {}
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def manifestheader(self):
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"""v10 does not have a manifest header chunk"""
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return {}
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def filelogheader(self):
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"""return the header of the filelogs chunk, v10 only has the filename"""
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l = self._chunklength()
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if not l:
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return {}
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fname = readexactly(self._stream, l)
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return {'filename': fname}
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def _deltaheader(self, headertuple, prevnode):
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node, p1, p2, cs = headertuple
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if prevnode is None:
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deltabase = p1
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else:
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deltabase = prevnode
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flags = 0
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return node, p1, p2, deltabase, cs, flags
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def deltachunk(self, prevnode):
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l = self._chunklength()
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if not l:
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return {}
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headerdata = readexactly(self._stream, self.deltaheadersize)
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header = self.deltaheader.unpack(headerdata)
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delta = readexactly(self._stream, l - self.deltaheadersize)
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node, p1, p2, deltabase, cs, flags = self._deltaheader(header, prevnode)
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return (node, p1, p2, cs, deltabase, delta, flags)
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def getchunks(self):
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"""returns all the chunks contains in the bundle
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Used when you need to forward the binary stream to a file or another
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network API. To do so, it parse the changegroup data, otherwise it will
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block in case of sshrepo because it don't know the end of the stream.
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"""
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# For changegroup 1 and 2, we expect 3 parts: changelog, manifestlog,
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# and a list of filelogs. For changegroup 3, we expect 4 parts:
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# changelog, manifestlog, a list of tree manifestlogs, and a list of
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# filelogs.
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#
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# Changelog and manifestlog parts are terminated with empty chunks. The
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# tree and file parts are a list of entry sections. Each entry section
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# is a series of chunks terminating in an empty chunk. The list of these
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# entry sections is terminated in yet another empty chunk, so we know
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# we've reached the end of the tree/file list when we reach an empty
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# chunk that was proceeded by no non-empty chunks.
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parts = 0
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while parts < 2 + self._grouplistcount:
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noentries = True
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while True:
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chunk = getchunk(self)
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if not chunk:
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# The first two empty chunks represent the end of the
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# changelog and the manifestlog portions. The remaining
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# empty chunks represent either A) the end of individual
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# tree or file entries in the file list, or B) the end of
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# the entire list. It's the end of the entire list if there
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# were no entries (i.e. noentries is True).
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if parts < 2:
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parts += 1
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elif noentries:
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parts += 1
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break
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noentries = False
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yield chunkheader(len(chunk))
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pos = 0
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while pos < len(chunk):
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next = pos + 2**20
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yield chunk[pos:next]
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pos = next
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yield closechunk()
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def _unpackmanifests(self, repo, revmap, trp, prog):
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self.callback = prog.increment
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# no need to check for empty manifest group here:
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# if the result of the merge of 1 and 2 is the same in 3 and 4,
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# no new manifest will be created and the manifest group will
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# be empty during the pull
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self.manifestheader()
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deltas = self.deltaiter()
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repo.manifestlog.addgroup(deltas, revmap, trp)
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prog.complete()
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self.callback = None
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def apply(self, repo, tr, srctype, url, targetphase=phases.draft,
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expectedtotal=None):
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"""Add the changegroup returned by source.read() to this repo.
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srctype is a string like 'push', 'pull', or 'unbundle'. url is
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the URL of the repo where this changegroup is coming from.
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Return an integer summarizing the change to this repo:
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- nothing changed or no source: 0
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- more heads than before: 1+added heads (2..n)
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- fewer heads than before: -1-removed heads (-2..-n)
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- number of heads stays the same: 1
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"""
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repo = repo.unfiltered()
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def csmap(x):
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repo.ui.debug("add changeset %s\n" % short(x))
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return len(cl)
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def revmap(x):
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return cl.rev(x)
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changesets = files = revisions = 0
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try:
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# The transaction may already carry source information. In this
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# case we use the top level data. We overwrite the argument
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# because we need to use the top level value (if they exist)
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# in this function.
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srctype = tr.hookargs.setdefault('source', srctype)
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url = tr.hookargs.setdefault('url', url)
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repo.hook('prechangegroup',
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throw=True, **pycompat.strkwargs(tr.hookargs))
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# write changelog data to temp files so concurrent readers
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# will not see an inconsistent view
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cl = repo.changelog
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cl.delayupdate(tr)
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oldheads = set(cl.heads())
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trp = weakref.proxy(tr)
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# pull off the changeset group
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repo.ui.status(_("adding changesets\n"))
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clstart = len(cl)
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progress = repo.ui.makeprogress(_('changesets'), unit=_('chunks'),
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total=expectedtotal)
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self.callback = progress.increment
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efiles = set()
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def onchangelog(cl, node):
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efiles.update(cl.readfiles(node))
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self.changelogheader()
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deltas = self.deltaiter()
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cgnodes = cl.addgroup(deltas, csmap, trp, addrevisioncb=onchangelog)
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efiles = len(efiles)
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if not cgnodes:
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repo.ui.develwarn('applied empty changegroup',
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config='warn-empty-changegroup')
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clend = len(cl)
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changesets = clend - clstart
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progress.complete()
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self.callback = None
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# pull off the manifest group
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repo.ui.status(_("adding manifests\n"))
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# We know that we'll never have more manifests than we had
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# changesets.
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progress = repo.ui.makeprogress(_('manifests'), unit=_('chunks'),
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total=changesets)
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self._unpackmanifests(repo, revmap, trp, progress)
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needfiles = {}
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if repo.ui.configbool('server', 'validate'):
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cl = repo.changelog
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ml = repo.manifestlog
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# validate incoming csets have their manifests
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for cset in pycompat.xrange(clstart, clend):
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mfnode = cl.changelogrevision(cset).manifest
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mfest = ml[mfnode].readdelta()
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# store file cgnodes we must see
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for f, n in mfest.iteritems():
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needfiles.setdefault(f, set()).add(n)
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# process the files
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repo.ui.status(_("adding file changes\n"))
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newrevs, newfiles = _addchangegroupfiles(
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repo, self, revmap, trp, efiles, needfiles)
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revisions += newrevs
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files += newfiles
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deltaheads = 0
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if oldheads:
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heads = cl.heads()
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deltaheads = len(heads) - len(oldheads)
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for h in heads:
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if h not in oldheads and repo[h].closesbranch():
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deltaheads -= 1
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htext = ""
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if deltaheads:
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htext = _(" (%+d heads)") % deltaheads
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repo.ui.status(_("added %d changesets"
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" with %d changes to %d files%s\n")
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% (changesets, revisions, files, htext))
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repo.invalidatevolatilesets()
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if changesets > 0:
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if 'node' not in tr.hookargs:
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tr.hookargs['node'] = hex(cl.node(clstart))
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tr.hookargs['node_last'] = hex(cl.node(clend - 1))
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hookargs = dict(tr.hookargs)
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else:
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hookargs = dict(tr.hookargs)
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hookargs['node'] = hex(cl.node(clstart))
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hookargs['node_last'] = hex(cl.node(clend - 1))
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repo.hook('pretxnchangegroup',
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throw=True, **pycompat.strkwargs(hookargs))
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added = [cl.node(r) for r in pycompat.xrange(clstart, clend)]
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phaseall = None
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if srctype in ('push', 'serve'):
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# Old servers can not push the boundary themselves.
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# New servers won't push the boundary if changeset already
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# exists locally as secret
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#
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# We should not use added here but the list of all change in
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# the bundle
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if repo.publishing():
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targetphase = phaseall = phases.public
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else:
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# closer target phase computation
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# Those changesets have been pushed from the
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# outside, their phases are going to be pushed
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# alongside. Therefor `targetphase` is
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# ignored.
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targetphase = phaseall = phases.draft
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if added:
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phases.registernew(repo, tr, targetphase, added)
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if phaseall is not None:
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phases.advanceboundary(repo, tr, phaseall, cgnodes)
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if changesets > 0:
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def runhooks():
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# These hooks run when the lock releases, not when the
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# transaction closes. So it's possible for the changelog
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# to have changed since we last saw it.
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if clstart >= len(repo):
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return
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repo.hook("changegroup", **pycompat.strkwargs(hookargs))
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for n in added:
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args = hookargs.copy()
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args['node'] = hex(n)
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del args['node_last']
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repo.hook("incoming", **pycompat.strkwargs(args))
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newheads = [h for h in repo.heads()
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if h not in oldheads]
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repo.ui.log("incoming",
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"%d incoming changes - new heads: %s\n",
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len(added),
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', '.join([hex(c[:6]) for c in newheads]))
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tr.addpostclose('changegroup-runhooks-%020i' % clstart,
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lambda tr: repo._afterlock(runhooks))
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finally:
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repo.ui.flush()
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# never return 0 here:
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if deltaheads < 0:
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ret = deltaheads - 1
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else:
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ret = deltaheads + 1
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return ret
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def deltaiter(self):
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"""
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returns an iterator of the deltas in this changegroup
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Useful for passing to the underlying storage system to be stored.
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|
|
"""
|
|
|
chain = None
|
|
|
for chunkdata in iter(lambda: self.deltachunk(chain), {}):
|
|
|
# Chunkdata: (node, p1, p2, cs, deltabase, delta, flags)
|
|
|
yield chunkdata
|
|
|
chain = chunkdata[0]
|
|
|
|
|
|
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 = deltaheader.size
|
|
|
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 = deltaheader.size
|
|
|
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):
|
|
|
super(cg3unpacker, self)._unpackmanifests(repo, revmap, trp, prog)
|
|
|
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)
|
|
|
deltas = self.deltaiter()
|
|
|
if not dirlog.addgroup(deltas, 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)
|
|
|
|
|
|
@attr.s(slots=True, frozen=True)
|
|
|
class revisiondeltarequest(object):
|
|
|
"""Describes a request to construct a revision delta.
|
|
|
|
|
|
Instances are converted into ``revisiondelta`` later.
|
|
|
"""
|
|
|
# Revision whose delta will be generated.
|
|
|
node = attr.ib()
|
|
|
|
|
|
# Linknode value.
|
|
|
linknode = attr.ib()
|
|
|
|
|
|
# Parent revisions to record in ``revisiondelta`` instance.
|
|
|
p1node = attr.ib()
|
|
|
p2node = attr.ib()
|
|
|
|
|
|
# Base revision that delta should be generated against. If nullid,
|
|
|
# the full revision data should be populated. If None, the delta
|
|
|
# may be generated against any base revision that is an ancestor of
|
|
|
# this revision. If any other value, the delta should be produced
|
|
|
# against that revision.
|
|
|
basenode = attr.ib()
|
|
|
|
|
|
# Whether this should be marked as an ellipsis revision.
|
|
|
ellipsis = attr.ib(default=False)
|
|
|
|
|
|
@attr.s(slots=True, frozen=True)
|
|
|
class revisiondelta(object):
|
|
|
"""Describes a delta entry in a changegroup.
|
|
|
|
|
|
Captured data is sufficient to serialize the delta into multiple
|
|
|
formats.
|
|
|
|
|
|
``revision`` and ``delta`` are mutually exclusive.
|
|
|
"""
|
|
|
# 20 byte node of this revision.
|
|
|
node = attr.ib()
|
|
|
# 20 byte nodes of parent revisions.
|
|
|
p1node = attr.ib()
|
|
|
p2node = attr.ib()
|
|
|
# 20 byte node of node this delta is against.
|
|
|
basenode = attr.ib()
|
|
|
# 20 byte node of changeset revision this delta is associated with.
|
|
|
linknode = attr.ib()
|
|
|
# 2 bytes of flags to apply to revision data.
|
|
|
flags = attr.ib()
|
|
|
# Size of base revision this delta is against. May be None if
|
|
|
# basenode is nullid.
|
|
|
baserevisionsize = attr.ib()
|
|
|
# Raw fulltext revision data.
|
|
|
revision = attr.ib()
|
|
|
# Delta between the basenode and node.
|
|
|
delta = attr.ib()
|
|
|
|
|
|
def _revisiondeltatochunks(delta, headerfn):
|
|
|
"""Serialize a revisiondelta to changegroup chunks."""
|
|
|
|
|
|
# The captured revision delta may be encoded as a delta against
|
|
|
# a base revision or as a full revision. The changegroup format
|
|
|
# requires that everything on the wire be deltas. So for full
|
|
|
# revisions, we need to invent a header that says to rewrite
|
|
|
# data.
|
|
|
|
|
|
if delta.delta is not None:
|
|
|
prefix, data = b'', delta.delta
|
|
|
elif delta.basenode == nullid:
|
|
|
data = delta.revision
|
|
|
prefix = mdiff.trivialdiffheader(len(data))
|
|
|
else:
|
|
|
data = delta.revision
|
|
|
prefix = mdiff.replacediffheader(delta.baserevisionsize,
|
|
|
len(data))
|
|
|
|
|
|
meta = headerfn(delta)
|
|
|
|
|
|
yield chunkheader(len(meta) + len(prefix) + len(data))
|
|
|
yield meta
|
|
|
if prefix:
|
|
|
yield prefix
|
|
|
yield data
|
|
|
|
|
|
def _sortnodesnormal(store, nodes, reorder):
|
|
|
"""Sort nodes for changegroup generation and turn into revnums."""
|
|
|
# for generaldelta revlogs, we linearize the revs; this will both be
|
|
|
# much quicker and generate a much smaller bundle
|
|
|
if (store._generaldelta and reorder is None) or reorder:
|
|
|
dag = dagutil.revlogdag(store)
|
|
|
return dag.linearize(set(store.rev(n) for n in nodes))
|
|
|
else:
|
|
|
return sorted([store.rev(n) for n in nodes])
|
|
|
|
|
|
def _sortnodesellipsis(store, nodes, cl, lookup):
|
|
|
"""Sort nodes for changegroup generation and turn into revnums."""
|
|
|
# Ellipses serving mode.
|
|
|
#
|
|
|
# In a perfect world, we'd generate better ellipsis-ified graphs
|
|
|
# for non-changelog revlogs. In practice, we haven't started doing
|
|
|
# that yet, so the resulting DAGs for the manifestlog and filelogs
|
|
|
# are actually full of bogus parentage on all the ellipsis
|
|
|
# nodes. This has the side effect that, while the contents are
|
|
|
# correct, the individual DAGs might be completely out of whack in
|
|
|
# a case like 882681bc3166 and its ancestors (back about 10
|
|
|
# revisions or so) in the main hg repo.
|
|
|
#
|
|
|
# The one invariant we *know* holds is that the new (potentially
|
|
|
# bogus) DAG shape will be valid if we order the nodes in the
|
|
|
# order that they're introduced in dramatis personae by the
|
|
|
# changelog, so what we do is we sort the non-changelog histories
|
|
|
# by the order in which they are used by the changelog.
|
|
|
key = lambda n: cl.rev(lookup(n))
|
|
|
return [store.rev(n) for n in sorted(nodes, key=key)]
|
|
|
|
|
|
def _handlerevisiondeltarequest(store, request, prevnode):
|
|
|
"""Obtain a revisiondelta from a revisiondeltarequest"""
|
|
|
|
|
|
node = request.node
|
|
|
rev = store.rev(node)
|
|
|
|
|
|
# Requesting a full revision.
|
|
|
if request.basenode == nullid:
|
|
|
baserev = nullrev
|
|
|
# Requesting an explicit revision.
|
|
|
elif request.basenode is not None:
|
|
|
baserev = store.rev(request.basenode)
|
|
|
# Allowing us to choose.
|
|
|
else:
|
|
|
p1, p2 = store.parentrevs(rev)
|
|
|
dp = store.deltaparent(rev)
|
|
|
|
|
|
if dp == nullrev and store.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.
|
|
|
baserev = store.rev(prevnode)
|
|
|
elif dp == nullrev:
|
|
|
# revlog is configured to use full snapshot for a reason,
|
|
|
# stick to full snapshot.
|
|
|
baserev = nullrev
|
|
|
elif dp not in (p1, p2, store.rev(prevnode)):
|
|
|
# Pick prev when we can't be sure remote has the base revision.
|
|
|
baserev = store.rev(prevnode)
|
|
|
else:
|
|
|
baserev = dp
|
|
|
|
|
|
if baserev != nullrev and not store.candelta(baserev, rev):
|
|
|
baserev = nullrev
|
|
|
|
|
|
revision = None
|
|
|
delta = None
|
|
|
baserevisionsize = None
|
|
|
|
|
|
if store.iscensored(baserev) or store.iscensored(rev):
|
|
|
try:
|
|
|
revision = store.revision(node, raw=True)
|
|
|
except error.CensoredNodeError as e:
|
|
|
revision = e.tombstone
|
|
|
|
|
|
if baserev != nullrev:
|
|
|
baserevisionsize = store.rawsize(baserev)
|
|
|
|
|
|
elif baserev == nullrev:
|
|
|
revision = store.revision(node, raw=True)
|
|
|
else:
|
|
|
delta = store.revdiff(baserev, rev)
|
|
|
|
|
|
extraflags = revlog.REVIDX_ELLIPSIS if request.ellipsis else 0
|
|
|
|
|
|
return revisiondelta(
|
|
|
node=node,
|
|
|
p1node=request.p1node,
|
|
|
p2node=request.p2node,
|
|
|
linknode=request.linknode,
|
|
|
basenode=store.node(baserev),
|
|
|
flags=store.flags(rev) | extraflags,
|
|
|
baserevisionsize=baserevisionsize,
|
|
|
revision=revision,
|
|
|
delta=delta,
|
|
|
)
|
|
|
|
|
|
def _makenarrowdeltarequest(cl, store, ischangelog, rev, node, linkrev,
|
|
|
linknode, clrevtolocalrev, fullclnodes,
|
|
|
precomputedellipsis):
|
|
|
linkparents = precomputedellipsis[linkrev]
|
|
|
def local(clrev):
|
|
|
"""Turn a changelog revnum into a local revnum.
|
|
|
|
|
|
The ellipsis dag is stored as revnums on the changelog,
|
|
|
but when we're producing ellipsis entries for
|
|
|
non-changelog revlogs, we need to turn those numbers into
|
|
|
something local. This does that for us, and during the
|
|
|
changelog sending phase will also expand the stored
|
|
|
mappings as needed.
|
|
|
"""
|
|
|
if clrev == nullrev:
|
|
|
return nullrev
|
|
|
|
|
|
if ischangelog:
|
|
|
return clrev
|
|
|
|
|
|
# Walk the ellipsis-ized changelog breadth-first looking for a
|
|
|
# change that has been linked from the current revlog.
|
|
|
#
|
|
|
# For a flat manifest revlog only a single step should be necessary
|
|
|
# as all relevant changelog entries are relevant to the flat
|
|
|
# manifest.
|
|
|
#
|
|
|
# For a filelog or tree manifest dirlog however not every changelog
|
|
|
# entry will have been relevant, so we need to skip some changelog
|
|
|
# nodes even after ellipsis-izing.
|
|
|
walk = [clrev]
|
|
|
while walk:
|
|
|
p = walk[0]
|
|
|
walk = walk[1:]
|
|
|
if p in clrevtolocalrev:
|
|
|
return clrevtolocalrev[p]
|
|
|
elif p in fullclnodes:
|
|
|
walk.extend([pp for pp in cl.parentrevs(p)
|
|
|
if pp != nullrev])
|
|
|
elif p in precomputedellipsis:
|
|
|
walk.extend([pp for pp in precomputedellipsis[p]
|
|
|
if pp != nullrev])
|
|
|
else:
|
|
|
# In this case, we've got an ellipsis with parents
|
|
|
# outside the current bundle (likely an
|
|
|
# incremental pull). We "know" that we can use the
|
|
|
# value of this same revlog at whatever revision
|
|
|
# is pointed to by linknode. "Know" is in scare
|
|
|
# quotes because I haven't done enough examination
|
|
|
# of edge cases to convince myself this is really
|
|
|
# a fact - it works for all the (admittedly
|
|
|
# thorough) cases in our testsuite, but I would be
|
|
|
# somewhat unsurprised to find a case in the wild
|
|
|
# where this breaks down a bit. That said, I don't
|
|
|
# know if it would hurt anything.
|
|
|
for i in pycompat.xrange(rev, 0, -1):
|
|
|
if store.linkrev(i) == clrev:
|
|
|
return i
|
|
|
# We failed to resolve a parent for this node, so
|
|
|
# we crash the changegroup construction.
|
|
|
raise error.Abort(
|
|
|
'unable to resolve parent while packing %r %r'
|
|
|
' for changeset %r' % (store.indexfile, rev, clrev))
|
|
|
|
|
|
return nullrev
|
|
|
|
|
|
if not linkparents or (
|
|
|
store.parentrevs(rev) == (nullrev, nullrev)):
|
|
|
p1, p2 = nullrev, nullrev
|
|
|
elif len(linkparents) == 1:
|
|
|
p1, = sorted(local(p) for p in linkparents)
|
|
|
p2 = nullrev
|
|
|
else:
|
|
|
p1, p2 = sorted(local(p) for p in linkparents)
|
|
|
|
|
|
p1node, p2node = store.node(p1), store.node(p2)
|
|
|
|
|
|
# TODO: try and actually send deltas for ellipsis data blocks
|
|
|
return revisiondeltarequest(
|
|
|
node=node,
|
|
|
p1node=p1node,
|
|
|
p2node=p2node,
|
|
|
linknode=linknode,
|
|
|
basenode=nullid,
|
|
|
ellipsis=True,
|
|
|
)
|
|
|
|
|
|
def deltagroup(repo, revs, store, ischangelog, lookup, forcedeltaparentprev,
|
|
|
units=None,
|
|
|
ellipses=False, clrevtolocalrev=None, fullclnodes=None,
|
|
|
precomputedellipsis=None):
|
|
|
"""Calculate deltas for a set of revisions.
|
|
|
|
|
|
Is a generator of ``revisiondelta`` instances.
|
|
|
|
|
|
If units is not None, progress detail will be generated, units specifies
|
|
|
the type of revlog that is touched (changelog, manifest, etc.).
|
|
|
"""
|
|
|
if not revs:
|
|
|
return
|
|
|
|
|
|
# We perform two passes over the revisions whose data we will emit.
|
|
|
#
|
|
|
# In the first pass, we obtain information about the deltas that will
|
|
|
# be generated. This involves computing linknodes and adjusting the
|
|
|
# request to take shallow fetching into account. The end result of
|
|
|
# this pass is a list of "request" objects stating which deltas
|
|
|
# to obtain.
|
|
|
#
|
|
|
# The second pass is simply resolving the requested deltas.
|
|
|
|
|
|
cl = repo.changelog
|
|
|
|
|
|
# In the first pass, collect info about the deltas we'll be
|
|
|
# generating.
|
|
|
requests = []
|
|
|
|
|
|
# Add the parent of the first rev.
|
|
|
revs.insert(0, store.parentrevs(revs[0])[0])
|
|
|
|
|
|
for i in pycompat.xrange(len(revs) - 1):
|
|
|
prev = revs[i]
|
|
|
curr = revs[i + 1]
|
|
|
|
|
|
node = store.node(curr)
|
|
|
linknode = lookup(node)
|
|
|
p1node, p2node = store.parents(node)
|
|
|
|
|
|
if ellipses:
|
|
|
linkrev = cl.rev(linknode)
|
|
|
clrevtolocalrev[linkrev] = curr
|
|
|
|
|
|
# This is a node to send in full, because the changeset it
|
|
|
# corresponds to was a full changeset.
|
|
|
if linknode in fullclnodes:
|
|
|
requests.append(revisiondeltarequest(
|
|
|
node=node,
|
|
|
p1node=p1node,
|
|
|
p2node=p2node,
|
|
|
linknode=linknode,
|
|
|
basenode=None,
|
|
|
))
|
|
|
|
|
|
elif linkrev not in precomputedellipsis:
|
|
|
pass
|
|
|
else:
|
|
|
requests.append(_makenarrowdeltarequest(
|
|
|
cl, store, ischangelog, curr, node, linkrev, linknode,
|
|
|
clrevtolocalrev, fullclnodes,
|
|
|
precomputedellipsis))
|
|
|
else:
|
|
|
requests.append(revisiondeltarequest(
|
|
|
node=node,
|
|
|
p1node=p1node,
|
|
|
p2node=p2node,
|
|
|
linknode=linknode,
|
|
|
basenode=store.node(prev) if forcedeltaparentprev else None,
|
|
|
))
|
|
|
|
|
|
# We expect the first pass to be fast, so we only engage the progress
|
|
|
# meter for constructing the revision deltas.
|
|
|
progress = None
|
|
|
if units is not None:
|
|
|
progress = repo.ui.makeprogress(_('bundling'), unit=units,
|
|
|
total=len(requests))
|
|
|
|
|
|
prevnode = store.node(revs[0])
|
|
|
for i, request in enumerate(requests):
|
|
|
if progress:
|
|
|
progress.update(i + 1)
|
|
|
|
|
|
delta = _handlerevisiondeltarequest(store, request, prevnode)
|
|
|
|
|
|
yield delta
|
|
|
|
|
|
prevnode = request.node
|
|
|
|
|
|
if progress:
|
|
|
progress.complete()
|
|
|
|
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class cgpacker(object):
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def __init__(self, repo, filematcher, version, allowreorder,
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|
builddeltaheader, manifestsend,
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|
forcedeltaparentprev=False,
|
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|
bundlecaps=None, ellipses=False,
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|
shallow=False, ellipsisroots=None, fullnodes=None):
|
|
|
"""Given a source repo, construct a bundler.
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|
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filematcher is a matcher that matches on files to include in the
|
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|
changegroup. Used to facilitate sparse changegroups.
|
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|
|
allowreorder controls whether reordering of revisions is allowed.
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|
This value is used when ``bundle.reorder`` is ``auto`` or isn't
|
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|
set.
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|
|
|
forcedeltaparentprev indicates whether delta parents must be against
|
|
|
the previous revision in a delta group. This should only be used for
|
|
|
compatibility with changegroup version 1.
|
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|
|
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|
builddeltaheader is a callable that constructs the header for a group
|
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|
delta.
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manifestsend is a chunk to send after manifests have been fully emitted.
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|
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ellipses indicates whether ellipsis serving mode is enabled.
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|
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|
bundlecaps is optional and can be used to specify the set of
|
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|
capabilities which can be used to build the bundle. While bundlecaps is
|
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|
unused in core Mercurial, extensions rely on this feature to communicate
|
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|
capabilities to customize the changegroup packer.
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|
shallow indicates whether shallow data might be sent. The packer may
|
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|
need to pack file contents not introduced by the changes being packed.
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fullnodes is the set of changelog nodes which should not be ellipsis
|
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|
nodes. We store this rather than the set of nodes that should be
|
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|
ellipsis because for very large histories we expect this to be
|
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|
significantly smaller.
|
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|
"""
|
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assert filematcher
|
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self._filematcher = filematcher
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self.version = version
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self._forcedeltaparentprev = forcedeltaparentprev
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self._builddeltaheader = builddeltaheader
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self._manifestsend = manifestsend
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self._ellipses = ellipses
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# Set of capabilities we can use to build the bundle.
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if bundlecaps is None:
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bundlecaps = set()
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self._bundlecaps = bundlecaps
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self._isshallow = shallow
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self._fullclnodes = fullnodes
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# Maps ellipsis revs to their roots at the changelog level.
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|
self._precomputedellipsis = ellipsisroots
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# experimental config: bundle.reorder
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reorder = repo.ui.config('bundle', 'reorder')
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if reorder == 'auto':
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self._reorder = allowreorder
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else:
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self._reorder = stringutil.parsebool(reorder)
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self._repo = repo
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if self._repo.ui.verbose and not self._repo.ui.debugflag:
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self._verbosenote = self._repo.ui.note
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else:
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self._verbosenote = lambda s: None
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def generate(self, commonrevs, clnodes, fastpathlinkrev, source):
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"""Yield a sequence of changegroup byte chunks."""
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repo = self._repo
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cl = repo.changelog
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self._verbosenote(_('uncompressed size of bundle content:\n'))
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size = 0
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clstate, deltas = self._generatechangelog(cl, clnodes)
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for delta in deltas:
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for chunk in _revisiondeltatochunks(delta, self._builddeltaheader):
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size += len(chunk)
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|
yield chunk
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close = closechunk()
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size += len(close)
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|
yield closechunk()
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|
self._verbosenote(_('%8.i (changelog)\n') % size)
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clrevorder = clstate['clrevorder']
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|
mfs = clstate['mfs']
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|
changedfiles = clstate['changedfiles']
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# We need to make sure that the linkrev in the changegroup refers to
|
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|
# the first changeset that introduced the manifest or file revision.
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|
# The fastpath is usually safer than the slowpath, because the filelogs
|
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|
# are walked in revlog order.
|
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|
#
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|
# When taking the slowpath with reorder=None and the manifest revlog
|
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|
# uses generaldelta, the manifest may be walked in the "wrong" order.
|
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|
# 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.
|
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|
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)
|
|
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|
|
|
fnodes = {} # needed file nodes
|
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|
|
|
|
size = 0
|
|
|
it = self.generatemanifests(
|
|
|
commonrevs, clrevorder, fastpathlinkrev, mfs, fnodes, source,
|
|
|
clstate['clrevtomanifestrev'])
|
|
|
|
|
|
for dir, deltas in it:
|
|
|
if dir:
|
|
|
assert self.version == b'03'
|
|
|
chunk = _fileheader(dir)
|
|
|
size += len(chunk)
|
|
|
yield chunk
|
|
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|
|
|
for delta in deltas:
|
|
|
chunks = _revisiondeltatochunks(delta, self._builddeltaheader)
|
|
|
for chunk in chunks:
|
|
|
size += len(chunk)
|
|
|
yield chunk
|
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|
|
|
close = closechunk()
|
|
|
size += len(close)
|
|
|
yield close
|
|
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|
|
|
self._verbosenote(_('%8.i (manifests)\n') % size)
|
|
|
yield self._manifestsend
|
|
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|
|
|
mfdicts = None
|
|
|
if self._ellipses and self._isshallow:
|
|
|
mfdicts = [(self._repo.manifestlog[n].read(), lr)
|
|
|
for (n, lr) in mfs.iteritems()]
|
|
|
|
|
|
mfs.clear()
|
|
|
clrevs = set(cl.rev(x) for x in clnodes)
|
|
|
|
|
|
it = self.generatefiles(changedfiles, commonrevs,
|
|
|
source, mfdicts, fastpathlinkrev,
|
|
|
fnodes, clrevs)
|
|
|
|
|
|
for path, deltas in it:
|
|
|
h = _fileheader(path)
|
|
|
size = len(h)
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|
|
yield h
|
|
|
|
|
|
for delta in deltas:
|
|
|
chunks = _revisiondeltatochunks(delta, self._builddeltaheader)
|
|
|
for chunk in chunks:
|
|
|
size += len(chunk)
|
|
|
yield chunk
|
|
|
|
|
|
close = closechunk()
|
|
|
size += len(close)
|
|
|
yield close
|
|
|
|
|
|
self._verbosenote(_('%8.i %s\n') % (size, path))
|
|
|
|
|
|
yield closechunk()
|
|
|
|
|
|
if clnodes:
|
|
|
repo.hook('outgoing', node=hex(clnodes[0]), source=source)
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|
|
|
|
|
def _generatechangelog(self, cl, nodes):
|
|
|
"""Generate data for changelog chunks.
|
|
|
|
|
|
Returns a 2-tuple of a dict containing state and an iterable of
|
|
|
byte chunks. The state will not be fully populated until the
|
|
|
chunk stream has been fully consumed.
|
|
|
"""
|
|
|
clrevorder = {}
|
|
|
mfs = {} # needed manifests
|
|
|
mfl = self._repo.manifestlog
|
|
|
# TODO violates storage abstraction.
|
|
|
mfrevlog = mfl._revlog
|
|
|
changedfiles = set()
|
|
|
clrevtomanifestrev = {}
|
|
|
|
|
|
# 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)
|
|
|
|
|
|
if self._ellipses:
|
|
|
# Only update mfs if x is going to be sent. Otherwise we
|
|
|
# end up with bogus linkrevs specified for manifests and
|
|
|
# we skip some manifest nodes that we should otherwise
|
|
|
# have sent.
|
|
|
if (x in self._fullclnodes
|
|
|
or cl.rev(x) in self._precomputedellipsis):
|
|
|
n = c[0]
|
|
|
# Record the first changeset introducing this manifest
|
|
|
# version.
|
|
|
mfs.setdefault(n, x)
|
|
|
# Set this narrow-specific dict so we have the lowest
|
|
|
# manifest revnum to look up for this cl revnum. (Part of
|
|
|
# mapping changelog ellipsis parents to manifest ellipsis
|
|
|
# parents)
|
|
|
clrevtomanifestrev.setdefault(cl.rev(x), mfrevlog.rev(n))
|
|
|
# We can't trust the changed files list in the changeset if the
|
|
|
# client requested a shallow clone.
|
|
|
if self._isshallow:
|
|
|
changedfiles.update(mfl[c[0]].read().keys())
|
|
|
else:
|
|
|
changedfiles.update(c[3])
|
|
|
else:
|
|
|
|
|
|
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
|
|
|
|
|
|
# Changelog doesn't benefit from reordering revisions. So send out
|
|
|
# revisions in store order.
|
|
|
revs = sorted(cl.rev(n) for n in nodes)
|
|
|
|
|
|
state = {
|
|
|
'clrevorder': clrevorder,
|
|
|
'mfs': mfs,
|
|
|
'changedfiles': changedfiles,
|
|
|
'clrevtomanifestrev': clrevtomanifestrev,
|
|
|
}
|
|
|
|
|
|
gen = deltagroup(
|
|
|
self._repo, revs, cl, True, lookupcl,
|
|
|
self._forcedeltaparentprev,
|
|
|
ellipses=self._ellipses,
|
|
|
units=_('changesets'),
|
|
|
clrevtolocalrev={},
|
|
|
fullclnodes=self._fullclnodes,
|
|
|
precomputedellipsis=self._precomputedellipsis)
|
|
|
|
|
|
return state, gen
|
|
|
|
|
|
def generatemanifests(self, commonrevs, clrevorder, fastpathlinkrev, mfs,
|
|
|
fnodes, source, clrevtolocalrev):
|
|
|
"""Returns an iterator of changegroup chunks containing manifests.
|
|
|
|
|
|
`source` is unused here, but is used by extensions like remotefilelog to
|
|
|
change what is sent based in pulls vs pushes, etc.
|
|
|
"""
|
|
|
repo = self._repo
|
|
|
cl = repo.changelog
|
|
|
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, nodes):
|
|
|
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 = nodes[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
|
|
|
|
|
|
while tmfnodes:
|
|
|
dir, nodes = tmfnodes.popitem()
|
|
|
store = dirlog(dir)
|
|
|
|
|
|
if not self._filematcher.visitdir(store._dir[:-1] or '.'):
|
|
|
prunednodes = []
|
|
|
else:
|
|
|
frev, flr = store.rev, store.linkrev
|
|
|
prunednodes = [n for n in nodes
|
|
|
if flr(frev(n)) not in commonrevs]
|
|
|
|
|
|
if dir and not prunednodes:
|
|
|
continue
|
|
|
|
|
|
lookupfn = makelookupmflinknode(dir, nodes)
|
|
|
|
|
|
if self._ellipses:
|
|
|
revs = _sortnodesellipsis(store, prunednodes, cl,
|
|
|
lookupfn)
|
|
|
else:
|
|
|
revs = _sortnodesnormal(store, prunednodes,
|
|
|
self._reorder)
|
|
|
|
|
|
deltas = deltagroup(
|
|
|
self._repo, revs, store, False, lookupfn,
|
|
|
self._forcedeltaparentprev,
|
|
|
ellipses=self._ellipses,
|
|
|
units=_('manifests'),
|
|
|
clrevtolocalrev=clrevtolocalrev,
|
|
|
fullclnodes=self._fullclnodes,
|
|
|
precomputedellipsis=self._precomputedellipsis)
|
|
|
|
|
|
yield dir, deltas
|
|
|
|
|
|
# The 'source' parameter is useful for extensions
|
|
|
def generatefiles(self, changedfiles, commonrevs, source,
|
|
|
mfdicts, fastpathlinkrev, fnodes, clrevs):
|
|
|
changedfiles = list(filter(self._filematcher, changedfiles))
|
|
|
|
|
|
if not fastpathlinkrev:
|
|
|
def normallinknodes(unused, fname):
|
|
|
return fnodes.get(fname, {})
|
|
|
else:
|
|
|
cln = self._repo.changelog.node
|
|
|
|
|
|
def normallinknodes(store, fname):
|
|
|
flinkrev = store.linkrev
|
|
|
fnode = store.node
|
|
|
revs = ((r, flinkrev(r)) for r in store)
|
|
|
return dict((fnode(r), cln(lr))
|
|
|
for r, lr in revs if lr in clrevs)
|
|
|
|
|
|
clrevtolocalrev = {}
|
|
|
|
|
|
if self._isshallow:
|
|
|
# In a shallow clone, the linknodes callback needs to also include
|
|
|
# those file nodes that are in the manifests we sent but weren't
|
|
|
# introduced by those manifests.
|
|
|
commonctxs = [self._repo[c] for c in commonrevs]
|
|
|
clrev = self._repo.changelog.rev
|
|
|
|
|
|
# Defining this function has a side-effect of overriding the
|
|
|
# function of the same name that was passed in as an argument.
|
|
|
# TODO have caller pass in appropriate function.
|
|
|
def linknodes(flog, fname):
|
|
|
for c in commonctxs:
|
|
|
try:
|
|
|
fnode = c.filenode(fname)
|
|
|
clrevtolocalrev[c.rev()] = flog.rev(fnode)
|
|
|
except error.ManifestLookupError:
|
|
|
pass
|
|
|
links = normallinknodes(flog, fname)
|
|
|
if len(links) != len(mfdicts):
|
|
|
for mf, lr in mfdicts:
|
|
|
fnode = mf.get(fname, None)
|
|
|
if fnode in links:
|
|
|
links[fnode] = min(links[fnode], lr, key=clrev)
|
|
|
elif fnode:
|
|
|
links[fnode] = lr
|
|
|
return links
|
|
|
else:
|
|
|
linknodes = normallinknodes
|
|
|
|
|
|
repo = self._repo
|
|
|
cl = repo.changelog
|
|
|
progress = repo.ui.makeprogress(_('bundling'), unit=_('files'),
|
|
|
total=len(changedfiles))
|
|
|
for i, fname in enumerate(sorted(changedfiles)):
|
|
|
filerevlog = repo.file(fname)
|
|
|
if not filerevlog:
|
|
|
raise error.Abort(_("empty or missing file data for %s") %
|
|
|
fname)
|
|
|
|
|
|
clrevtolocalrev.clear()
|
|
|
|
|
|
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]
|
|
|
|
|
|
frev, flr = filerevlog.rev, filerevlog.linkrev
|
|
|
filenodes = [n for n in linkrevnodes
|
|
|
if flr(frev(n)) not in commonrevs]
|
|
|
|
|
|
if not filenodes:
|
|
|
continue
|
|
|
|
|
|
if self._ellipses:
|
|
|
revs = _sortnodesellipsis(filerevlog, filenodes,
|
|
|
cl, lookupfilelog)
|
|
|
else:
|
|
|
revs = _sortnodesnormal(filerevlog, filenodes,
|
|
|
self._reorder)
|
|
|
|
|
|
progress.update(i + 1, item=fname)
|
|
|
|
|
|
deltas = deltagroup(
|
|
|
self._repo, revs, filerevlog, False, lookupfilelog,
|
|
|
self._forcedeltaparentprev,
|
|
|
ellipses=self._ellipses,
|
|
|
clrevtolocalrev=clrevtolocalrev,
|
|
|
fullclnodes=self._fullclnodes,
|
|
|
precomputedellipsis=self._precomputedellipsis)
|
|
|
|
|
|
yield fname, deltas
|
|
|
|
|
|
progress.complete()
|
|
|
|
|
|
def _makecg1packer(repo, filematcher, bundlecaps, ellipses=False,
|
|
|
shallow=False, ellipsisroots=None, fullnodes=None):
|
|
|
builddeltaheader = lambda d: _CHANGEGROUPV1_DELTA_HEADER.pack(
|
|
|
d.node, d.p1node, d.p2node, d.linknode)
|
|
|
|
|
|
return cgpacker(repo, filematcher, b'01',
|
|
|
allowreorder=None,
|
|
|
builddeltaheader=builddeltaheader,
|
|
|
manifestsend=b'',
|
|
|
forcedeltaparentprev=True,
|
|
|
bundlecaps=bundlecaps,
|
|
|
ellipses=ellipses,
|
|
|
shallow=shallow,
|
|
|
ellipsisroots=ellipsisroots,
|
|
|
fullnodes=fullnodes)
|
|
|
|
|
|
def _makecg2packer(repo, filematcher, bundlecaps, ellipses=False,
|
|
|
shallow=False, ellipsisroots=None, fullnodes=None):
|
|
|
builddeltaheader = lambda d: _CHANGEGROUPV2_DELTA_HEADER.pack(
|
|
|
d.node, d.p1node, d.p2node, d.basenode, d.linknode)
|
|
|
|
|
|
# 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).
|
|
|
return cgpacker(repo, filematcher, b'02',
|
|
|
allowreorder=False,
|
|
|
builddeltaheader=builddeltaheader,
|
|
|
manifestsend=b'',
|
|
|
bundlecaps=bundlecaps,
|
|
|
ellipses=ellipses,
|
|
|
shallow=shallow,
|
|
|
ellipsisroots=ellipsisroots,
|
|
|
fullnodes=fullnodes)
|
|
|
|
|
|
def _makecg3packer(repo, filematcher, bundlecaps, ellipses=False,
|
|
|
shallow=False, ellipsisroots=None, fullnodes=None):
|
|
|
builddeltaheader = lambda d: _CHANGEGROUPV3_DELTA_HEADER.pack(
|
|
|
d.node, d.p1node, d.p2node, d.basenode, d.linknode, d.flags)
|
|
|
|
|
|
return cgpacker(repo, filematcher, b'03',
|
|
|
allowreorder=False,
|
|
|
builddeltaheader=builddeltaheader,
|
|
|
manifestsend=closechunk(),
|
|
|
bundlecaps=bundlecaps,
|
|
|
ellipses=ellipses,
|
|
|
shallow=shallow,
|
|
|
ellipsisroots=ellipsisroots,
|
|
|
fullnodes=fullnodes)
|
|
|
|
|
|
_packermap = {'01': (_makecg1packer, cg1unpacker),
|
|
|
# cg2 adds support for exchanging generaldelta
|
|
|
'02': (_makecg2packer, cg2unpacker),
|
|
|
# cg3 adds support for exchanging revlog flags and treemanifests
|
|
|
'03': (_makecg3packer, 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')
|
|
|
if repository.NARROW_REQUIREMENT in repo.requirements:
|
|
|
# Versions 01 and 02 don't support revlog flags, and we need to
|
|
|
# support that for stripping and unbundling to work.
|
|
|
versions.discard('01')
|
|
|
versions.discard('02')
|
|
|
if LFS_REQUIREMENT in repo.requirements:
|
|
|
# Versions 01 and 02 don't support revlog flags, and we need to
|
|
|
# mark LFS entries with REVIDX_EXTSTORED.
|
|
|
versions.discard('01')
|
|
|
versions.discard('02')
|
|
|
|
|
|
return versions
|
|
|
|
|
|
def localversion(repo):
|
|
|
# Finds the best version to use for bundles that are meant to be used
|
|
|
# locally, such as those from strip and shelve, and temporary bundles.
|
|
|
return max(supportedoutgoingversions(repo))
|
|
|
|
|
|
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, bundlecaps=None, filematcher=None,
|
|
|
ellipses=False, shallow=False, ellipsisroots=None,
|
|
|
fullnodes=None):
|
|
|
assert version in supportedoutgoingversions(repo)
|
|
|
|
|
|
if filematcher is None:
|
|
|
filematcher = matchmod.alwaysmatcher(repo.root, '')
|
|
|
|
|
|
if version == '01' and not filematcher.always():
|
|
|
raise error.ProgrammingError('version 01 changegroups do not support '
|
|
|
'sparse file matchers')
|
|
|
|
|
|
if ellipses and version in (b'01', b'02'):
|
|
|
raise error.Abort(
|
|
|
_('ellipsis nodes require at least cg3 on client and server, '
|
|
|
'but negotiated version %s') % version)
|
|
|
|
|
|
# Requested files could include files not in the local store. So
|
|
|
# filter those out.
|
|
|
filematcher = matchmod.intersectmatchers(repo.narrowmatch(),
|
|
|
filematcher)
|
|
|
|
|
|
fn = _packermap[version][0]
|
|
|
return fn(repo, filematcher, bundlecaps, ellipses=ellipses,
|
|
|
shallow=shallow, ellipsisroots=ellipsisroots,
|
|
|
fullnodes=fullnodes)
|
|
|
|
|
|
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 makechangegroup(repo, outgoing, version, source, fastpath=False,
|
|
|
bundlecaps=None):
|
|
|
cgstream = makestream(repo, outgoing, version, source,
|
|
|
fastpath=fastpath, bundlecaps=bundlecaps)
|
|
|
return getunbundler(version, util.chunkbuffer(cgstream), None,
|
|
|
{'clcount': len(outgoing.missing) })
|
|
|
|
|
|
def makestream(repo, outgoing, version, source, fastpath=False,
|
|
|
bundlecaps=None, filematcher=None):
|
|
|
bundler = getbundler(version, repo, bundlecaps=bundlecaps,
|
|
|
filematcher=filematcher)
|
|
|
|
|
|
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 _addchangegroupfiles(repo, source, revmap, trp, expectedfiles, needfiles):
|
|
|
revisions = 0
|
|
|
files = 0
|
|
|
progress = repo.ui.makeprogress(_('files'), unit=_('files'),
|
|
|
total=expectedfiles)
|
|
|
for chunkdata in iter(source.filelogheader, {}):
|
|
|
files += 1
|
|
|
f = chunkdata["filename"]
|
|
|
repo.ui.debug("adding %s revisions\n" % f)
|
|
|
progress.increment()
|
|
|
fl = repo.file(f)
|
|
|
o = len(fl)
|
|
|
try:
|
|
|
deltas = source.deltaiter()
|
|
|
if not fl.addgroup(deltas, 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 pycompat.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]
|
|
|
progress.complete()
|
|
|
|
|
|
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
|
|
|
|
