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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 tempfile
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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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nullrev,
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short,
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)
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from . import (
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dagutil,
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error,
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mdiff,
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phases,
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pycompat,
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util,
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)
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_CHANGEGROUPV1_DELTA_HEADER = "20s20s20s20s"
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_CHANGEGROUPV2_DELTA_HEADER = "20s20s20s20s20s"
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_CHANGEGROUPV3_DELTA_HEADER = ">20s20s20s20s20sH"
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def readexactly(stream, n):
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'''read n bytes from stream.read and abort if less was available'''
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s = stream.read(n)
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if len(s) < n:
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raise error.Abort(_("stream ended unexpectedly"
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" (got %d bytes, expected %d)")
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% (len(s), n))
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return s
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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 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 = tempfile.mkstemp(prefix="hg-bundle-", suffix=".hg")
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fh = os.fdopen(fd, pycompat.sysstr("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 = struct.calcsize(deltaheader)
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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 = struct.unpack(self.deltaheader, 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, numchanges):
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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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self.callback = prog(_('manifests'), numchanges)
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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._revlog.addgroup(deltas, revmap, trp)
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repo.ui.progress(_('manifests'), None)
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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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class prog(object):
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def __init__(self, step, total):
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self._step = step
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self._total = total
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self._count = 1
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def __call__(self):
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repo.ui.progress(self._step, self._count, unit=_('chunks'),
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total=self._total)
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self._count += 1
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self.callback = prog(_('changesets'), expectedtotal)
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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='empty-changegroup')
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clend = len(cl)
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changesets = clend - clstart
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repo.ui.progress(_('changesets'), None)
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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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self._unpackmanifests(repo, revmap, trp, prog, changesets)
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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 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 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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"%s 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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"""
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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 = 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)
|
|
|
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)
|
|
|
|
|
|
class cg1packer(object):
|
|
|
deltaheader = _CHANGEGROUPV1_DELTA_HEADER
|
|
|
version = '01'
|
|
|
def __init__(self, repo, bundlecaps=None):
|
|
|
"""Given a source repo, construct a bundler.
|
|
|
|
|
|
bundlecaps is optional and can be used to specify the set of
|
|
|
capabilities which can be used to build the bundle. While bundlecaps is
|
|
|
unused in core Mercurial, extensions rely on this feature to communicate
|
|
|
capabilities to customize the changegroup packer.
|
|
|
"""
|
|
|
# Set of capabilities we can use to build the bundle.
|
|
|
if bundlecaps is None:
|
|
|
bundlecaps = set()
|
|
|
self._bundlecaps = bundlecaps
|
|
|
# experimental config: bundle.reorder
|
|
|
reorder = repo.ui.config('bundle', 'reorder')
|
|
|
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, source):
|
|
|
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, source):
|
|
|
"""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
|
|
|
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, bundlecaps=None):
|
|
|
super(cg2packer, self).__init__(repo, bundlecaps)
|
|
|
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 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):
|
|
|
assert version in supportedoutgoingversions(repo)
|
|
|
return _packermap[version][0](repo, bundlecaps)
|
|
|
|
|
|
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):
|
|
|
bundler = getbundler(version, repo, bundlecaps=bundlecaps)
|
|
|
|
|
|
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
|
|
|
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:
|
|
|
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 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
|
|
|
|
