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#!/usr/bin/env python

# Copyright (C) 2007, Red Hat, Inc.
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

import os
import sys
import dbus
from optparse import OptionParser

from sugar.activity import activityfactory
from sugar.bundle.activitybundle import ActivityBundle

usage = "usage: %prog [options] activity"
parser = OptionParser(usage)
parser.add_option("-d", "--debug", action="store_true", dest="debug",
                  help="launch activity inside gdb")
(options, args) = parser.parse_args()

if len(args) == 0:
    print 'You need to specify the activity bundle_id.'
    sys.exit(1)

bus = dbus.SessionBus()
proxy = bus.get_object('org.laptop.Shell', '/org/laptop/Shell')
path = dbus.Interface(proxy, 'org.laptop.Shell').GetBundlePath(args[0])
if not path:
    print 'Cannot find %s bundle.' % args[0]
    sys.exit(1)

activity = ActivityBundle(path)
cmd_args = activityfactory.get_command(activity)

def _which(exec_file):
    if 'PATH' in os.environ:
        envpath = os.environ['PATH']
    else:
        return None

    for path in envpath.split(os.pathsep):
        fullname = os.path.join(path, exec_file)
        if os.path.exists(fullname):
            return fullname

    return None

def _get_interpreter(exec_file):
    if os.path.exists(exec_file):
        abs_path = exec_file
    else:
        abs_path = _which(exec_file)
        if not abs_path:
            return exec_file

    f = open(abs_path)
    line = f.readline(100)
    if line.startswith('#!'):
        cmds = line[2:].strip().split(' ')
        cmds.append(abs_path)

        if '/usr/bin/env' in cmds:
            cmds.remove('/usr/bin/env')

        return cmds

    return exec_file

if options.debug:
    act_args = cmd_args
    cmd_args = ['gdb', '--args']
    cmd_args.extend(_get_interpreter(act_args.pop(0)))
    cmd_args.extend(act_args)

os.chdir(str(activity.get_path()))
os.execvpe(cmd_args[0], cmd_args, activityfactory.get_environment(activity))