# sshrepo.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, incorporated herein by reference.

from node import *

from remoterepo import *

from i18n import _

import repo, os, re, stat, util

class sshrepository(remoterepository):

    def __init__(self, ui, path, create=0):

        self._url = path

        self.ui = ui

        m = re.match(r'^ssh://(([^@]+)@)?([^:/]+)(:(\d+))?(/(.*))?$', path)

        if not m:

            self.raise_(repo.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 "."

        args = self.user and ("%s@%s" % (self.user, self.host)) or self.host

        args = self.port and ("%s -p %s") % (args, self.port) or args

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

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

        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.raise_(repo.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 = os.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.raise_(repo.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 raise_(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.items():

            self.pipeo.write("%s %d\n" % (k, len(v)))

            self.pipeo.write(v)

        self.pipeo.flush()

        return self.pipei

    def call(self, cmd, **args):

        r = self.do_cmd(cmd, **args)

        l = r.readline()

        self.readerr()

        try:

            l = int(l)

        except:

            self.raise_(util.UnexpectedOutput(_("unexpected response:"), l))

        return r.read(l)

    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.raise_(repo.RepoError(data))

    def heads(self):

        d = self.call("heads")

        try:

            return map(bin, d[:-1].split(" "))

        except:

            self.raise_(util.UnexpectedOutput(_("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.raise_(util.UnexpectedOutput(_("unexpected response:"), d))

    def between(self, pairs):

        n = "\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.raise_(util.UnexpectedOutput(_("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.raise_(repo.RepoError(_("push refused: %s") % d))

        while 1:

            d = cg.read(4096)

            if not d: break

            self.pipeo.write(str(len(d)) + '\n')

            self.pipeo.write(d)

            self.readerr()

        self.pipeo.write('0\n')

        self.pipeo.flush()

        self.readerr()

        l = int(self.pipei.readline())

        r = self.pipei.read(l)

        if r:

            # remote may send "unsynced changes"

            self.raise_(hg.RepoError(_("push failed: %s") % r))

        self.readerr()

        l = int(self.pipei.readline())

        r = self.pipei.read(l)

        return int(r)

    def addchangegroup(self, cg, source, url):

        d = self.call("addchangegroup")

        if d:

            self.raise_(repo.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()

        l = int(self.pipei.readline())

        r = self.pipei.read(l)

        if not r:

            return 1

        return int(r)

    def stream_out(self):

        return self.do_cmd('stream_out')

instance = sshrepository