view mercurial/sshrepo.py @ 8165:78658990c725

convert/bzr: make it work with filemaps (issue1631)

The bzr converter maintains a child -> parents mapping and drop entries
whenever a child is read. It does not work with filemaps, getchangedfiles() may
be called more than once when filtered files belong to merge revisions.
getchanges() still works that way but it is not clear whether a similar issue
can arise when interacting with merges.

# sshrepo.py - ssh repository proxy class for mercurial
#
# Copyright 2005, 2006 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.

from node import bin, hex
from i18n import _
import repo, os, re, util, error

class remotelock(object):
    def __init__(self, repo):
        self.repo = repo
    def release(self):
        self.repo.unlock()
        self.repo = None
    def __del__(self):
        if self.repo:
            self.release()

class sshrepository(repo.repository):
    def __init__(self, ui, path, create=0):
        self._url = path
        self.ui = ui

        m = re.match(r'^ssh://(([^@]+)@)?([^:/]+)(:(\d+))?(/(.*))?$', path)
        if not m:
            self.abort(error.RepoError(_("couldn't parse location %s") % path))

        self.user = m.group(2)
        self.host = m.group(3)
        self.port = m.group(5)
        self.path = m.group(7) or "."

        sshcmd = self.ui.config("ui", "ssh", "ssh")
        remotecmd = self.ui.config("ui", "remotecmd", "hg")

        args = util.sshargs(sshcmd, self.host, self.user, self.port)

        if create:
            cmd = '%s %s "%s init %s"'
            cmd = cmd % (sshcmd, args, remotecmd, self.path)

            ui.note(_('running %s\n') % cmd)
            res = util.system(cmd)
            if res != 0:
                self.abort(error.RepoError(_("could not create remote repo")))

        self.validate_repo(ui, sshcmd, args, remotecmd)

    def url(self):
        return self._url

    def validate_repo(self, ui, sshcmd, args, remotecmd):
        # cleanup up previous run
        self.cleanup()

        cmd = '%s %s "%s -R %s serve --stdio"'
        cmd = cmd % (sshcmd, args, remotecmd, self.path)

        cmd = util.quotecommand(cmd)
        ui.note(_('running %s\n') % cmd)
        self.pipeo, self.pipei, self.pipee = util.popen3(cmd, 'b')

        # skip any noise generated by remote shell
        self.do_cmd("hello")
        r = self.do_cmd("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:
                ui.debug(_("remote: "), l)
            lines.append(l)
            max_noise -= 1
        else:
            self.abort(error.RepoError(_("no suitable response from remote hg")))

        self.capabilities = util.set()
        lines.reverse()
        for l in lines:
            if l.startswith("capabilities:"):
                self.capabilities.update(l[:-1].split(":")[1].split())
                break

    def readerr(self):
        while 1:
            size = util.fstat(self.pipee).st_size
            if size == 0: break
            l = self.pipee.readline()
            if not l: break
            self.ui.status(_("remote: "), l)

    def abort(self, exception):
        self.cleanup()
        raise exception

    def cleanup(self):
        try:
            self.pipeo.close()
            self.pipei.close()
            # read the error descriptor until EOF
            for l in self.pipee:
                self.ui.status(_("remote: "), l)
            self.pipee.close()
        except:
            pass

    __del__ = cleanup

    def do_cmd(self, cmd, **args):
        self.ui.debug(_("sending %s command\n") % cmd)
        self.pipeo.write("%s\n" % cmd)
        for k, v in args.iteritems():
            self.pipeo.write("%s %d\n" % (k, len(v)))
            self.pipeo.write(v)
        self.pipeo.flush()

        return self.pipei

    def call(self, cmd, **args):
        self.do_cmd(cmd, **args)
        return self._recv()

    def _recv(self):
        l = self.pipei.readline()
        self.readerr()
        try:
            l = int(l)
        except:
            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 lookup(self, key):
        self.requirecap('lookup', _('look up remote revision'))
        d = self.call("lookup", key=key)
        success, data = d[:-1].split(" ", 1)
        if int(success):
            return bin(data)
        else:
            self.abort(error.RepoError(data))

    def heads(self):
        d = self.call("heads")
        try:
            return map(bin, d[:-1].split(" "))
        except:
            self.abort(error.ResponseError(_("unexpected response:"), d))

    def branches(self, nodes):
        n = " ".join(map(hex, nodes))
        d = self.call("branches", nodes=n)
        try:
            br = [ tuple(map(bin, b.split(" "))) for b in d.splitlines() ]
            return br
        except:
            self.abort(error.ResponseError(_("unexpected response:"), d))

    def between(self, pairs):
        n = " ".join(["-".join(map(hex, p)) for p in pairs])
        d = self.call("between", pairs=n)
        try:
            p = [ l and map(bin, l.split(" ")) or [] for l in d.splitlines() ]
            return p
        except:
            self.abort(error.ResponseError(_("unexpected response:"), d))

    def changegroup(self, nodes, kind):
        n = " ".join(map(hex, nodes))
        return self.do_cmd("changegroup", roots=n)

    def changegroupsubset(self, bases, heads, kind):
        self.requirecap('changegroupsubset', _('look up remote changes'))
        bases = " ".join(map(hex, bases))
        heads = " ".join(map(hex, heads))
        return self.do_cmd("changegroupsubset", bases=bases, heads=heads)

    def unbundle(self, cg, heads, source):
        d = self.call("unbundle", heads=' '.join(map(hex, heads)))
        if d:
            # remote may send "unsynced changes"
            self.abort(error.RepoError(_("push refused: %s") % d))

        while 1:
            d = cg.read(4096)
            if not d:
                break
            self._send(d)

        self._send("", flush=True)

        r = self._recv()
        if r:
            # remote may send "unsynced changes"
            self.abort(error.RepoError(_("push failed: %s") % r))

        r = self._recv()
        try:
            return int(r)
        except:
            self.abort(error.ResponseError(_("unexpected response:"), r))

    def addchangegroup(self, cg, source, url):
        d = self.call("addchangegroup")
        if d:
            self.abort(error.RepoError(_("push refused: %s") % d))
        while 1:
            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:
            self.abort(error.ResponseError(_("unexpected response:"), r))

    def stream_out(self):
        return self.do_cmd('stream_out')

instance = sshrepository