~bernd-sch/onehundredscopes/sshsearch

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#! /usr/bin/python

#    Copyright (c) 2011 David Calle <davidc@framli.eu>
#    Copyright (c) 2011 Michael Hall <mhall119@gmail.com>

#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.

#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.

#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

import os.path
import paramiko
import sys

from gi.repository import GLib, GObject, Gio
from gi.repository import Dee
# FIXME: Some weird bug in Dee or PyGI makes Dee fail unless we probe
#        it *before* we import the Unity module... ?!
_m = dir(Dee.SequenceModel)
from gi.repository import Unity

BUS_NAME = "net.launchpad.lens.sshsearch"
SSHCONFIG = os.path.join('~', '.ssh', 'config')
SSHCONFIG_EXPAND = os.path.expanduser(SSHCONFIG)
KNOWN_HOSTS = os.path.join('~', '.ssh', 'known_hosts')
KNOWN_HOSTS_EXPAND = os.path.expanduser(KNOWN_HOSTS)
TERMINAL_APP = 'gnome-terminal'
TERMINAL_APP_MIMETYPE = 'application-x-desktop'
SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
ICON_FILE = os.path.join(SCRIPT_DIR, 'unity-lens-sshsearch.png')

class Daemon:

    def __init__ (self):
        # The path for the Lens *must* also match the one in our .lens file
        self._lens = Unity.Lens.new ("/net/launchpad/lens/sshsearch", "sshsearch")
        self._scope = Unity.Scope.new ("/net/launchpad/lens/sshsearch/main")
        self._scope.connect ("notify::active-search", self.on_search_changed)
        self._scope.connect ("notify::active-global-search", self.on_global_search_changed)
        self._scope.connect ("filters-changed", self.on_search_changed);
        self._scope.connect ("notify::active", self.on_search_changed);
        self._scope.connect ("activate-uri", self.on_activate_uri);
        self._scope.export()

        self._lens.props.search_hint = "SSH"
        self._lens.props.visible = True;
        self._lens.props.search_in_global = True;
        
        # Populate categories
        cats = []
        cats.append(Unity.Category.new(SSHCONFIG,
                                       Gio.ThemedIcon.new(ICON_FILE),
                                       Unity.CategoryRenderer.VERTICAL_TILE))
        cats.append(Unity.Category.new(KNOWN_HOSTS,
                                       Gio.ThemedIcon.new(ICON_FILE),
                                       Unity.CategoryRenderer.VERTICAL_TILE))
        self._lens.props.categories = cats
        
        # Populate filters
        filters = []
        self._lens.props.filters = filters

        self._lens.add_local_scope (self._scope);
        self._lens.export ()
        
        self._config_hosts = self.__read_config()
        self._known_hosts = self.__read_known_hosts()
        print self._config_hosts
        print self._known_hosts
        
    def __read_config(self):
        c = paramiko.SSHConfig()
        c.parse(open(SSHCONFIG_EXPAND))
        return [h['host'].lower() for h in c._config if h['host'] != '*']
        
    def __read_known_hosts(self):
        h = paramiko.HostKeys(KNOWN_HOSTS_EXPAND)
        return h.keys()
        
    def on_search_changed (self, entry, *args):
        search = self._scope.props.active_search or None
        if search:
            search_string = search.props.search_string.lower() or None
        else:
            search_string = None
        results = self._scope.props.results_model
        self.update_results_model (search_string, results)

    def on_global_search_changed (self, entry, *args):
        search = self._scope.props.active_global_search or None
        if search:
            search_string = search.props.search_string.lower() or None
        else:
            search_string = None
        results = self._scope.props.global_results_model
        self.update_results_model(search_string, results)

    def update_results_model(self, search, model):
        if search is None or search == '':
            return
         
        model.clear()
        found = [host for host in self._config_hosts if host.find(search) >= 0]
        for host in found:
            model.append('ssh://config/%s' % host,
                         TERMINAL_APP,
                         0,
                         TERMINAL_APP_MIMETYPE,
                         host, host, '')
                         
        found = [host for host in self._known_hosts if host.find(search) >= 0]
        for host in found:
            model.append('ssh://known_hosts/%s' % host,
                         TERMINAL_APP,
                         1,
                         TERMINAL_APP_MIMETYPE,
                         host, host, '')

    def __parse_hoststring(self, hoststring):
        if hoststring.startswith('['):
            return hoststring[1:].split(']:')
        return hoststring, 22

    def on_activate_uri (self, scope, uri):
        hoststring = uri.split('/')[-1]
        host, port = self.__parse_hoststring(hoststring)

        GLib.spawn_command_line_async('%s -e "ssh -p %s %s"' % (TERMINAL_APP, port, host))
        return Unity.ActivationResponse(handled=Unity.HandledType.HIDE_DASH, goto_uri='')


if __name__ == "__main__":
    session_bus_connection = Gio.bus_get_sync(Gio.BusType.SESSION, None)
    session_bus = Gio.DBusProxy.new_sync(session_bus_connection, 0, None,
                                         'org.freedesktop.DBus',
                                         '/org/freedesktop/DBus',
                                         'org.freedesktop.DBus', None)
    result = session_bus.call_sync('RequestName',
                                   GLib.Variant("(su)", (BUS_NAME, 0x4)),
                                   0, -1, None)
                                   
    # Unpack variant response with signature "(u)". 1 means we got it.
    result = result.unpack()[0]
    
    if result != 1 :
        print >> sys.stderr, "Failed to own name %s. Bailing out." % BUS_NAME
        raise SystemExit (1)
    
    daemon = Daemon()
    GObject.MainLoop().run()