dirstate: do not write an empty dirstate just for backup
This will get in the way when we get more strict about holding the lock when
writing the dirstate.
Instead, we simply don't copy dirstate files around if there are None at backup
time.
A couple of tests are impacted they no longer need to backup such "empty"
dirstate.
# cvs.py: CVS conversion code inspired by hg-cvs-import and git-cvsimport
#
# Copyright 2005-2009 Olivia Mackall <olivia@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.
import errno
import os
import re
import socket
from mercurial.i18n import _
from mercurial.pycompat import (
getattr,
open,
)
from mercurial import (
encoding,
error,
util,
)
from mercurial.utils import (
dateutil,
procutil,
)
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, b"CVS")
if not os.path.exists(cvs):
raise NoRepo(_(b"%s does not look like a CVS checkout") % path)
checktool(b'cvs')
self.changeset = None
self.files = {}
self.tags = {}
self.lastbranch = {}
self.socket = None
self.cvsroot = open(os.path.join(cvs, b"Root"), b'rb').read()[:-1]
self.cvsrepo = open(os.path.join(cvs, b"Repository"), b'rb').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(
_(
b'cvs source does not support specifying '
b'multiple revs'
)
)
# TODO: handle tags
try:
# patchset number?
maxrev = int(self.revs[0])
except ValueError:
raise error.Abort(
_(b'revision %s is not a patchset number') % self.revs[0]
)
d = encoding.getcwd()
try:
os.chdir(self.path)
cache = b'update'
if not self.ui.configbool(b'convert', b'cvsps.cache'):
cache = None
db = cvsps.createlog(self.ui, cache=cache)
db = cvsps.createchangeset(
self.ui,
db,
fuzz=int(self.ui.config(b'convert', b'cvsps.fuzz')),
mergeto=self.ui.config(b'convert', b'cvsps.mergeto'),
mergefrom=self.ui.config(b'convert', b'cvsps.mergefrom'),
)
for cs in db:
if maxrev and cs.id > maxrev:
break
id = b"%d" % cs.id
cs.author = self.recode(cs.author)
self.lastbranch[cs.branch] = id
cs.comment = self.recode(cs.comment)
if self.ui.configbool(b'convert', b'localtimezone'):
cs.date = makedatetimestamp(cs.date[0])
date = dateutil.datestr(cs.date, b'%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] = b"%s%s" % (
b'.'.join([(b"%d" % x) for x in f.revision]),
[b'', b'(DEAD)'][f.dead],
)
# add current commit to set
c = commit(
author=cs.author,
date=date,
parents=[(b"%d" % p.id) for p in cs.parents],
desc=cs.comment,
branch=cs.branch or b'',
)
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 = [b'cvs', b'server']
self.ui.status(_(b"connecting to %s\n") % root)
if root.startswith(b":pserver:"):
root = root[9:]
m = re.match(
br'(?:(.*?)(?::(.*?))?@)?([^:/]*)(?::(\d*))?(.*)', root
)
if m:
conntype = b"pserver"
user, passw, serv, port, root = m.groups()
if not user:
user = b"anonymous"
if not port:
port = 2401
else:
port = int(port)
format0 = b":pserver:%s@%s:%s" % (user, serv, root)
format1 = b":pserver:%s@%s:%d%s" % (user, serv, port, root)
if not passw:
passw = b"A"
cvspass = os.path.expanduser(b"~/.cvspass")
try:
pf = open(cvspass, b'rb')
for line in pf.read().splitlines():
part1, part2 = line.split(b' ', 1)
# /1 :pserver:user@example.com:2401/cvsroot/foo
# Ah<Z
if part1 == b'/1':
part1, part2 = part2.split(b' ', 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(
b"\n".join(
[
b"BEGIN AUTH REQUEST",
root,
user,
passw,
b"END AUTH REQUEST",
b"",
]
)
)
if sck.recv(128) != b"I LOVE YOU\n":
raise error.Abort(_(b"CVS pserver authentication failed"))
self.writep = self.readp = sck.makefile('rwb')
if not conntype and root.startswith(b":local:"):
conntype = b"local"
root = root[7:]
if not conntype:
# :ext:user@host/home/user/path/to/cvsroot
if root.startswith(b":ext:"):
root = root[5:]
m = re.match(br'(?:([^@:/]+)@)?([^:/]+):?(.*)', root)
# Do not take Windows path "c:\foo\bar" for a connection strings
if os.path.isdir(root) or not m:
conntype = b"local"
else:
conntype = b"rsh"
user, host, root = m.group(1), m.group(2), m.group(3)
if conntype != b"pserver":
if conntype == b"rsh":
rsh = encoding.environ.get(b"CVS_RSH") or b"ssh"
if user:
cmd = [rsh, b'-l', user, host] + cmd
else:
cmd = [rsh, host] + cmd
# popen2 does not support argument lists under Windows
cmd = b' '.join(procutil.shellquote(arg) for arg in cmd)
self.writep, self.readp = procutil.popen2(cmd)
self.realroot = root
self.writep.write(b"Root %s\n" % root)
self.writep.write(
b"Valid-responses ok error Valid-requests Mode"
b" M Mbinary E Checked-in Created Updated"
b" Merged Removed\n"
)
self.writep.write(b"valid-requests\n")
self.writep.flush()
r = self.readp.readline()
if not r.startswith(b"Valid-requests"):
raise error.Abort(
_(
b'unexpected response from CVS server '
b'(expected "Valid-requests", but got %r)'
)
% r
)
if b"UseUnchanged" in r:
self.writep.write(b"UseUnchanged\n")
self.writep.flush()
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(
_(b"%d bytes missing from remote file") % count
)
count -= len(data)
output.write(data)
return output.getvalue()
self._parse()
if rev.endswith(b"(DEAD)"):
return None, None
args = (b"-N -P -kk -r %s --" % rev).split()
args.append(self.cvsrepo + b'/' + name)
for x in args:
self.writep.write(b"Argument %s\n" % x)
self.writep.write(b"Directory .\n%s\nco\n" % self.realroot)
self.writep.flush()
data = b""
mode = None
while True:
line = self.readp.readline()
if line.startswith(b"Created ") or line.startswith(b"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(b" "):
data += line[1:]
elif line.startswith(b"M "):
pass
elif line.startswith(b"Mbinary "):
count = int(self.readp.readline()[:-1])
data = chunkedread(self.readp, count)
else:
if line == b"ok\n":
if mode is None:
raise error.Abort(_(b'malformed response from CVS'))
return (data, b"x" in mode and b"x" or b"")
elif line.startswith(b"E "):
self.ui.warn(_(b"cvs server: %s\n") % line[2:])
elif line.startswith(b"Remove"):
self.readp.readline()
else:
raise error.Abort(_(b"unknown CVS response: %s") % line)
def getchanges(self, rev, full):
if full:
raise error.Abort(_(b"convert from cvs does not support --full"))
self._parse()
return sorted(self.files[rev].items()), {}, 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])