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split: new extension to split changesets...
split: new extension to split changesets This diff introduces an experimental split extension to split changesets. The implementation is largely inspired by Laurent Charignon's implementation for mutable-history (changeset 9603aa1ecdfd54b0d86e262318a72e0a2ffeb6cc [1]) This version contains various improvements: - Rebase by default. This is more friendly for new users. Split won't lead to merge conflicts so a rebase won't give the user more trouble. This has been on by default at Facebook for months now and seems to be a good UX improvement. The rebase skips obsoleted or orphaned changesets, which can avoid issues like allowdivergence, merge conflicts, etc. This is more flexible because the user can decide what to do next (see the last test case in test-split.t) - Remove "Done split? [y/n]" prompt. That could be detected by checking `repo.status()` instead. - Works with obsstore disabled. Without obsstore, split uses strip to clean up old nodes, and it can even handle split a non-head changeset with "allowunstable" disabled, since it runs a rebase to solve the "unstable" issue in a same transaction. - More friendly editor text. Put what has been already split into the editor text so users won't lost track about where they are. [1]: https://bitbucket.org/marmoute/mutable-history/commits/9603aa1ecdfd54b Differential Revision: https://phab.mercurial-scm.org/D1082

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cvs.py
297 lines | 10.5 KiB | text/x-python | PythonLexer
# cvs.py: CVS conversion code inspired by hg-cvs-import and git-cvsimport
#
# Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import errno
import os
import re
import socket
from mercurial.i18n import _
from mercurial import (
encoding,
error,
pycompat,
util,
)
from . import (
common,
cvsps,
)
stringio = util.stringio
checktool = common.checktool
commit = common.commit
converter_source = common.converter_source
makedatetimestamp = common.makedatetimestamp
NoRepo = common.NoRepo
class convert_cvs(converter_source):
def __init__(self, ui, repotype, path, revs=None):
super(convert_cvs, self).__init__(ui, repotype, path, revs=revs)
cvs = os.path.join(path, "CVS")
if not os.path.exists(cvs):
raise NoRepo(_("%s does not look like a CVS checkout") % path)
checktool('cvs')
self.changeset = None
self.files = {}
self.tags = {}
self.lastbranch = {}
self.socket = None
self.cvsroot = open(os.path.join(cvs, "Root")).read()[:-1]
self.cvsrepo = open(os.path.join(cvs, "Repository")).read()[:-1]
self.encoding = encoding.encoding
self._connect()
def _parse(self):
if self.changeset is not None:
return
self.changeset = {}
maxrev = 0
if self.revs:
if len(self.revs) > 1:
raise error.Abort(_('cvs source does not support specifying '
'multiple revs'))
# TODO: handle tags
try:
# patchset number?
maxrev = int(self.revs[0])
except ValueError:
raise error.Abort(_('revision %s is not a patchset number')
% self.revs[0])
d = pycompat.getcwd()
try:
os.chdir(self.path)
id = None
cache = 'update'
if not self.ui.configbool('convert', 'cvsps.cache'):
cache = None
db = cvsps.createlog(self.ui, cache=cache)
db = cvsps.createchangeset(self.ui, db,
fuzz=int(self.ui.config('convert', 'cvsps.fuzz')),
mergeto=self.ui.config('convert', 'cvsps.mergeto'),
mergefrom=self.ui.config('convert', 'cvsps.mergefrom'))
for cs in db:
if maxrev and cs.id > maxrev:
break
id = str(cs.id)
cs.author = self.recode(cs.author)
self.lastbranch[cs.branch] = id
cs.comment = self.recode(cs.comment)
if self.ui.configbool('convert', 'localtimezone'):
cs.date = makedatetimestamp(cs.date[0])
date = util.datestr(cs.date, '%Y-%m-%d %H:%M:%S %1%2')
self.tags.update(dict.fromkeys(cs.tags, id))
files = {}
for f in cs.entries:
files[f.file] = "%s%s" % ('.'.join([str(x)
for x in f.revision]),
['', '(DEAD)'][f.dead])
# add current commit to set
c = commit(author=cs.author, date=date,
parents=[str(p.id) for p in cs.parents],
desc=cs.comment, branch=cs.branch or '')
self.changeset[id] = c
self.files[id] = files
self.heads = self.lastbranch.values()
finally:
os.chdir(d)
def _connect(self):
root = self.cvsroot
conntype = None
user, host = None, None
cmd = ['cvs', 'server']
self.ui.status(_("connecting to %s\n") % root)
if root.startswith(":pserver:"):
root = root[9:]
m = re.match(r'(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?(.*)',
root)
if m:
conntype = "pserver"
user, passw, serv, port, root = m.groups()
if not user:
user = "anonymous"
if not port:
port = 2401
else:
port = int(port)
format0 = ":pserver:%s@%s:%s" % (user, serv, root)
format1 = ":pserver:%s@%s:%d%s" % (user, serv, port, root)
if not passw:
passw = "A"
cvspass = os.path.expanduser("~/.cvspass")
try:
pf = open(cvspass)
for line in pf.read().splitlines():
part1, part2 = line.split(' ', 1)
# /1 :pserver:user@example.com:2401/cvsroot/foo
# Ah<Z
if part1 == '/1':
part1, part2 = part2.split(' ', 1)
format = format1
# :pserver:user@example.com:/cvsroot/foo Ah<Z
else:
format = format0
if part1 == format:
passw = part2
break
pf.close()
except IOError as inst:
if inst.errno != errno.ENOENT:
if not getattr(inst, 'filename', None):
inst.filename = cvspass
raise
sck = socket.socket()
sck.connect((serv, port))
sck.send("\n".join(["BEGIN AUTH REQUEST", root, user, passw,
"END AUTH REQUEST", ""]))
if sck.recv(128) != "I LOVE YOU\n":
raise error.Abort(_("CVS pserver authentication failed"))
self.writep = self.readp = sck.makefile('r+')
if not conntype and root.startswith(":local:"):
conntype = "local"
root = root[7:]
if not conntype:
# :ext:user@host/home/user/path/to/cvsroot
if root.startswith(":ext:"):
root = root[5:]
m = re.match(r'(?:([^@:/]+)@)?([^:/]+):?(.*)', root)
# Do not take Windows path "c:\foo\bar" for a connection strings
if os.path.isdir(root) or not m:
conntype = "local"
else:
conntype = "rsh"
user, host, root = m.group(1), m.group(2), m.group(3)
if conntype != "pserver":
if conntype == "rsh":
rsh = encoding.environ.get("CVS_RSH") or "ssh"
if user:
cmd = [rsh, '-l', user, host] + cmd
else:
cmd = [rsh, host] + cmd
# popen2 does not support argument lists under Windows
cmd = [util.shellquote(arg) for arg in cmd]
cmd = util.quotecommand(' '.join(cmd))
self.writep, self.readp = util.popen2(cmd)
self.realroot = root
self.writep.write("Root %s\n" % root)
self.writep.write("Valid-responses ok error Valid-requests Mode"
" M Mbinary E Checked-in Created Updated"
" Merged Removed\n")
self.writep.write("valid-requests\n")
self.writep.flush()
r = self.readp.readline()
if not r.startswith("Valid-requests"):
raise error.Abort(_('unexpected response from CVS server '
'(expected "Valid-requests", but got %r)')
% r)
if "UseUnchanged" in r:
self.writep.write("UseUnchanged\n")
self.writep.flush()
r = self.readp.readline()
def getheads(self):
self._parse()
return self.heads
def getfile(self, name, rev):
def chunkedread(fp, count):
# file-objects returned by socket.makefile() do not handle
# large read() requests very well.
chunksize = 65536
output = stringio()
while count > 0:
data = fp.read(min(count, chunksize))
if not data:
raise error.Abort(_("%d bytes missing from remote file")
% count)
count -= len(data)
output.write(data)
return output.getvalue()
self._parse()
if rev.endswith("(DEAD)"):
return None, None
args = ("-N -P -kk -r %s --" % rev).split()
args.append(self.cvsrepo + '/' + name)
for x in args:
self.writep.write("Argument %s\n" % x)
self.writep.write("Directory .\n%s\nco\n" % self.realroot)
self.writep.flush()
data = ""
mode = None
while True:
line = self.readp.readline()
if line.startswith("Created ") or line.startswith("Updated "):
self.readp.readline() # path
self.readp.readline() # entries
mode = self.readp.readline()[:-1]
count = int(self.readp.readline()[:-1])
data = chunkedread(self.readp, count)
elif line.startswith(" "):
data += line[1:]
elif line.startswith("M "):
pass
elif line.startswith("Mbinary "):
count = int(self.readp.readline()[:-1])
data = chunkedread(self.readp, count)
else:
if line == "ok\n":
if mode is None:
raise error.Abort(_('malformed response from CVS'))
return (data, "x" in mode and "x" or "")
elif line.startswith("E "):
self.ui.warn(_("cvs server: %s\n") % line[2:])
elif line.startswith("Remove"):
self.readp.readline()
else:
raise error.Abort(_("unknown CVS response: %s") % line)
def getchanges(self, rev, full):
if full:
raise error.Abort(_("convert from cvs does not support --full"))
self._parse()
return sorted(self.files[rev].iteritems()), {}, set()
def getcommit(self, rev):
self._parse()
return self.changeset[rev]
def gettags(self):
self._parse()
return self.tags
def getchangedfiles(self, rev, i):
self._parse()
return sorted(self.files[rev])