~launchpad-pqm/launchpad/devel

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# Copyright 2004-2007, 2009 Canonical Ltd.  All rights reserved.

"""Bazaar plugin to run the smart server on Launchpad.

Cribbed from bzrlib.builtins.cmd_serve from Bazaar 0.16.
"""

__metaclass__ = type

__all__ = ['cmd_launchpad_server']


import sys

from bzrlib.commands import Command, register_command
from bzrlib.option import Option
from bzrlib import lockdir, ui

from bzrlib.smart import medium, server
from bzrlib.transport import get_transport


class cmd_launchpad_server(Command):
    """Run a Bazaar server that maps Launchpad branch URLs to the internal
    file-system format.
    """

    aliases = ['lp-serve']

    takes_options = [
        Option('inet',
               help='serve on stdin/out for use from inetd or sshd'),
        Option('port',
               help='listen for connections on nominated port of the form '
                    '[hostname:]portnumber. Passing 0 as the port number will'
                    ' result in a dynamically allocated port. Default port is'
                    ' 4155.',
               type=str),
        Option('upload-directory',
               help='upload branches to this directory. Defaults to '
                    'config.codehosting.hosted_branches_root.',
               type=unicode),
        Option('mirror-directory',
               help='serve branches from this directory. Defaults to '
                    'config.codehosting.mirrored_branches_root.'),
        Option('branchfs-endpoint',
               help='the url of the internal XML-RPC server. Defaults to '
                    'config.codehosting.branchfs_endpoint.',
               type=unicode),
        ]

    takes_args = ['user_id']

    def get_smart_server(self, transport, port, inet):
        """Construct a smart server."""
        if inet:
            smart_server = medium.SmartServerPipeStreamMedium(
                sys.stdin, sys.stdout, transport)
        else:
            host = medium.BZR_DEFAULT_INTERFACE
            if port is None:
                port = medium.BZR_DEFAULT_PORT
            else:
                if ':' in port:
                    host, port = port.split(':')
                port = int(port)
            smart_server = server.SmartTCPServer(
                transport, host=host, port=port)
            print 'listening on port: ', smart_server.port
            sys.stdout.flush()
        return smart_server

    def run_server(self, smart_server):
        """Run the given smart server."""
        # for the duration of this server, no UI output is permitted.
        # note that this may cause problems with blackbox tests. This should
        # be changed with care though, as we dont want to use bandwidth
        # sending progress over stderr to smart server clients!
        old_factory = ui.ui_factory
        try:
            ui.ui_factory = ui.SilentUIFactory()
            smart_server.serve()
        finally:
            ui.ui_factory = old_factory

    def run(self, user_id, port=None, upload_directory=None,
            mirror_directory=None, branchfs_endpoint_url=None, inet=False):
        from lp.codehosting.vfs import get_lp_server
        lp_server = get_lp_server(
            int(user_id), branchfs_endpoint_url,
            upload_directory, mirror_directory)
        lp_server.setUp()

        old_lockdir_timeout = lockdir._DEFAULT_TIMEOUT_SECONDS
        try:
            lp_transport = get_transport(lp_server.get_url())
            smart_server = self.get_smart_server(lp_transport, port, inet)
            lockdir._DEFAULT_TIMEOUT_SECONDS = 0
            self.run_server(smart_server)
        finally:
            lockdir._DEFAULT_TIMEOUT_SECONDS = old_lockdir_timeout
            lp_server.tearDown()


register_command(cmd_launchpad_server)