rebase: remove experimental option from 'rebase' config section
Changeset
f0e9f38d250f introduced a guard against case where obsolete changesets
are included in the rebase in a way this will result in divergence (because
rebase create new successors for changeset which already have successors). In
the same go a 'rebase.allowdivergence' option was introduced to control that
behavior.
We rename this config option to 'experimental.allowdivergence' for multiple
reasons:
* First this behavior is attached to changeset evolution, a feature still
experimental.
* Second, there was no 'rebase' section in config before we introduced this
option. I would like to avoid proliferation of micro config section and
therefore would like to avoid the creation of this new section just for an
experimental feature.
* Third, this guard (warning the user about a history rewriting operation that
will create divergence) will very likely be generalised to all history
rewriting operations, making this not rebase specific.
* Finally, because this will likely be a general guard present a bit everywhere
in the UI we'll likely end up with something better than a config option to
control this behavior, so having the current config option living in
experimental will allow us make it disappear in the future.
So we banish this config option back to the experimental section where it
belongs, killing the newly born 'rebase' config section in the process.
# sshpeer.py - ssh repository proxy class for mercurial
#
# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import re
from .i18n import _
from . import (
error,
util,
wireproto,
)
class remotelock(object):
def __init__(self, repo):
self.repo = repo
def release(self):
self.repo.unlock()
self.repo = None
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
if self.repo:
self.release()
def __del__(self):
if self.repo:
self.release()
def _serverquote(s):
if not s:
return s
'''quote a string for the remote shell ... which we assume is sh'''
if re.match('[a-zA-Z0-9@%_+=:,./-]*$', s):
return s
return "'%s'" % s.replace("'", "'\\''")
def _forwardoutput(ui, pipe):
"""display all data currently available on pipe as remote output.
This is non blocking."""
s = util.readpipe(pipe)
if s:
for l in s.splitlines():
ui.status(_("remote: "), l, '\n')
class doublepipe(object):
"""Operate a side-channel pipe in addition of a main one
The side-channel pipe contains server output to be forwarded to the user
input. The double pipe will behave as the "main" pipe, but will ensure the
content of the "side" pipe is properly processed while we wait for blocking
call on the "main" pipe.
If large amounts of data are read from "main", the forward will cease after
the first bytes start to appear. This simplifies the implementation
without affecting actual output of sshpeer too much as we rarely issue
large read for data not yet emitted by the server.
The main pipe is expected to be a 'bufferedinputpipe' from the util module
that handle all the os specific bites. This class lives in this module
because it focus on behavior specific to the ssh protocol."""
def __init__(self, ui, main, side):
self._ui = ui
self._main = main
self._side = side
def _wait(self):
"""wait until some data are available on main or side
return a pair of boolean (ismainready, issideready)
(This will only wait for data if the setup is supported by `util.poll`)
"""
if getattr(self._main, 'hasbuffer', False): # getattr for classic pipe
return (True, True) # main has data, assume side is worth poking at.
fds = [self._main.fileno(), self._side.fileno()]
try:
act = util.poll(fds)
except NotImplementedError:
# non supported yet case, assume all have data.
act = fds
return (self._main.fileno() in act, self._side.fileno() in act)
def write(self, data):
return self._call('write', data)
def read(self, size):
return self._call('read', size)
def readline(self):
return self._call('readline')
def _call(self, methname, data=None):
"""call <methname> on "main", forward output of "side" while blocking
"""
# data can be '' or 0
if (data is not None and not data) or self._main.closed:
_forwardoutput(self._ui, self._side)
return ''
while True:
mainready, sideready = self._wait()
if sideready:
_forwardoutput(self._ui, self._side)
if mainready:
meth = getattr(self._main, methname)
if data is None:
return meth()
else:
return meth(data)
def close(self):
return self._main.close()
def flush(self):
return self._main.flush()
class sshpeer(wireproto.wirepeer):
def __init__(self, ui, path, create=False):
self._url = path
self.ui = ui
self.pipeo = self.pipei = self.pipee = None
u = util.url(path, parsequery=False, parsefragment=False)
if u.scheme != 'ssh' or not u.host or u.path is None:
self._abort(error.RepoError(_("couldn't parse location %s") % path))
self.user = u.user
if u.passwd is not None:
self._abort(error.RepoError(_("password in URL not supported")))
self.host = u.host
self.port = u.port
self.path = u.path or "."
sshcmd = self.ui.config("ui", "ssh", "ssh")
remotecmd = self.ui.config("ui", "remotecmd", "hg")
args = util.sshargs(sshcmd,
_serverquote(self.host),
_serverquote(self.user),
_serverquote(self.port))
if create:
cmd = '%s %s %s' % (sshcmd, args,
util.shellquote("%s init %s" %
(_serverquote(remotecmd), _serverquote(self.path))))
ui.debug('running %s\n' % cmd)
res = ui.system(cmd)
if res != 0:
self._abort(error.RepoError(_("could not create remote repo")))
self._validaterepo(sshcmd, args, remotecmd)
def url(self):
return self._url
def _validaterepo(self, sshcmd, args, remotecmd):
# cleanup up previous run
self.cleanup()
cmd = '%s %s %s' % (sshcmd, args,
util.shellquote("%s -R %s serve --stdio" %
(_serverquote(remotecmd), _serverquote(self.path))))
self.ui.debug('running %s\n' % cmd)
cmd = util.quotecommand(cmd)
# while self.subprocess isn't used, having it allows the subprocess to
# to clean up correctly later
#
# no buffer allow the use of 'select'
# feel free to remove buffering and select usage when we ultimately
# move to threading.
sub = util.popen4(cmd, bufsize=0)
self.pipeo, self.pipei, self.pipee, self.subprocess = sub
self.pipei = util.bufferedinputpipe(self.pipei)
self.pipei = doublepipe(self.ui, self.pipei, self.pipee)
self.pipeo = doublepipe(self.ui, self.pipeo, self.pipee)
# skip any noise generated by remote shell
self._callstream("hello")
r = self._callstream("between", pairs=("%s-%s" % ("0"*40, "0"*40)))
lines = ["", "dummy"]
max_noise = 500
while lines[-1] and max_noise:
l = r.readline()
self.readerr()
if lines[-1] == "1\n" and l == "\n":
break
if l:
self.ui.debug("remote: ", l)
lines.append(l)
max_noise -= 1
else:
self._abort(error.RepoError(_('no suitable response from '
'remote hg')))
self._caps = set()
for l in reversed(lines):
if l.startswith("capabilities:"):
self._caps.update(l[:-1].split(":")[1].split())
break
def _capabilities(self):
return self._caps
def readerr(self):
_forwardoutput(self.ui, self.pipee)
def _abort(self, exception):
self.cleanup()
raise exception
def cleanup(self):
if self.pipeo is None:
return
self.pipeo.close()
self.pipei.close()
try:
# read the error descriptor until EOF
for l in self.pipee:
self.ui.status(_("remote: "), l)
except (IOError, ValueError):
pass
self.pipee.close()
__del__ = cleanup
def _callstream(self, cmd, **args):
self.ui.debug("sending %s command\n" % cmd)
self.pipeo.write("%s\n" % cmd)
_func, names = wireproto.commands[cmd]
keys = names.split()
wireargs = {}
for k in keys:
if k == '*':
wireargs['*'] = args
break
else:
wireargs[k] = args[k]
del args[k]
for k, v in sorted(wireargs.iteritems()):
self.pipeo.write("%s %d\n" % (k, len(v)))
if isinstance(v, dict):
for dk, dv in v.iteritems():
self.pipeo.write("%s %d\n" % (dk, len(dv)))
self.pipeo.write(dv)
else:
self.pipeo.write(v)
self.pipeo.flush()
return self.pipei
def _callcompressable(self, cmd, **args):
return self._callstream(cmd, **args)
def _call(self, cmd, **args):
self._callstream(cmd, **args)
return self._recv()
def _callpush(self, cmd, fp, **args):
r = self._call(cmd, **args)
if r:
return '', r
while True:
d = fp.read(4096)
if not d:
break
self._send(d)
self._send("", flush=True)
r = self._recv()
if r:
return '', r
return self._recv(), ''
def _calltwowaystream(self, cmd, fp, **args):
r = self._call(cmd, **args)
if r:
# XXX needs to be made better
raise error.Abort('unexpected remote reply: %s' % r)
while True:
d = fp.read(4096)
if not d:
break
self._send(d)
self._send("", flush=True)
return self.pipei
def _recv(self):
l = self.pipei.readline()
if l == '\n':
self.readerr()
msg = _('check previous remote output')
self._abort(error.OutOfBandError(hint=msg))
self.readerr()
try:
l = int(l)
except ValueError:
self._abort(error.ResponseError(_("unexpected response:"), l))
return self.pipei.read(l)
def _send(self, data, flush=False):
self.pipeo.write("%d\n" % len(data))
if data:
self.pipeo.write(data)
if flush:
self.pipeo.flush()
self.readerr()
def lock(self):
self._call("lock")
return remotelock(self)
def unlock(self):
self._call("unlock")
def addchangegroup(self, cg, source, url, lock=None):
'''Send a changegroup to the remote server. Return an integer
similar to unbundle(). DEPRECATED, since it requires locking the
remote.'''
d = self._call("addchangegroup")
if d:
self._abort(error.RepoError(_("push refused: %s") % d))
while True:
d = cg.read(4096)
if not d:
break
self.pipeo.write(d)
self.readerr()
self.pipeo.flush()
self.readerr()
r = self._recv()
if not r:
return 1
try:
return int(r)
except ValueError:
self._abort(error.ResponseError(_("unexpected response:"), r))
instance = sshpeer