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gnome-shell/src/gnome-shell.in

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#!@PYTHON@
import atexit
import optparse
import os
import random
import re
import shutil
import signal
import subprocess
import sys
import tempfile
import termios
import time
import errno
def show_version(option, opt_str, value, parser):
print "GNOME Shell @VERSION@"
sys.exit()
def get_running_session_environs():
wanted_environment = ['DBUS_SESSION_BUS_ADDRESS', 'DISPLAY', 'XDG_DATA_DIRS',
'XAUTHORITY', 'XDG_SESSION_COOKIE', 'ORBIT_SOCKETDIR',
'SESSION_MANAGER']
num_re = re.compile('^[0-9]+$')
myuid = os.getuid()
if not os.path.isdir('/proc'):
return {}
for filename in os.listdir('/proc'):
if not num_re.match(filename):
continue
piddir = '/proc/' + filename
try:
stat = os.stat(piddir)
except OSError, e:
continue
if not stat.st_uid == myuid:
continue
try:
exe = os.readlink(piddir + '/exe')
except OSError, e:
continue
if os.path.basename(exe) != 'gnome-session':
continue
try:
f = open(os.path.join(piddir, 'environ'))
except OSError, e:
continue
environ_data = f.read()
f.close()
# There's a trailing null at the last one, so remove the
# empty string
environs = environ_data.split('\0')[:-1]
# Rumor has it the presence of just FOO (instead of FOO=bar)
# represents a deleted environment variable
environs = filter(lambda x: '=' in x, environs)
# Turn it into a dictionary
environs = dict(map(lambda x: x.split('=', 1), environs))
result = {}
for key in wanted_environment:
if key in environs:
result[key] = environs[key]
return result
def start_xephyr():
tmpdir = tempfile.mkdtemp("", "gnome-shell.")
atexit.register(shutil.rmtree, tmpdir)
display = ":" + str(random.randint(10, 99))
xauth_file = os.path.join(tmpdir, "database")
# Create a random 128-bit key and format it as hex
f = open("/dev/urandom", "r")
key = f.read(16)
f.close()
hexkey = "".join(("%02x" % ord(byte) for byte in key))
# Store that in an xauthority file as the key for connecting to our Xephyr
retcode = subprocess.call(["xauth",
"-f", xauth_file,
"add", display, "MIT-MAGIC-COOKIE-1", hexkey])
if retcode != 0:
raise RuntimeError("xauth failed")
# Launch Xephyr
try:
xephyr = subprocess.Popen(["Xephyr", display,
"-auth", xauth_file,
"-screen", options.geometry,
"-host-cursor"])
except OSError, e:
if e.errno == errno.ENOENT:
print "Could not find Xephyr."
sys.exit(1)
else:
raise
os.environ['DISPLAY'] = display
os.environ['XAUTHORITY'] = xauth_file
# Wait for server to get going: LAME
time.sleep(1)
# Start some windows in our session.
subprocess.Popen(["gnome-terminal"])
return xephyr;
GLXINFO_RE = re.compile(r"^(\S.*):\s*\n((?:^\s+.*\n)*)", re.MULTILINE)
def _get_glx_extensions():
"""Return a tuple of server, client, and effective GLX extensions"""
glxinfo = subprocess.Popen(["glxinfo"], stdout=subprocess.PIPE)
glxinfo_output = glxinfo.communicate()[0]
glxinfo.wait()
glxinfo_map = {}
for m in GLXINFO_RE.finditer(glxinfo_output):
glxinfo_map[m.group(1)] = m.group(2)
server_glx_extensions = set(re.split("\s*,\s*", glxinfo_map['server glx extensions'].strip()))
client_glx_extensions = set(re.split("\s*,\s*", glxinfo_map['client glx extensions'].strip()))
glx_extensions = set(re.split("\s*,\s*", glxinfo_map['GLX extensions'].strip()))
return (server_glx_extensions, client_glx_extensions, glx_extensions)
def start_shell():
bin_dir = os.path.dirname(os.path.abspath(sys.argv[0]))
if os.path.exists(os.path.join(bin_dir, 'gnome-shell.in')):
running_from_source_tree = True
top_dir = os.path.dirname(bin_dir)
plugin = os.path.join(top_dir, 'src', 'libgnome-shell.la')
typelib_dir = os.path.join(top_dir, "src")
js_dir = os.path.join(top_dir, "js")
data_dir = os.path.join(top_dir, "data")
else:
running_from_source_tree = False
plugin = 'libgnome-shell'
js_dir = os.path.join('@pkgdatadir@', 'js')
# Set up environment
env = dict(os.environ)
env.update({'GNOME_SHELL_JS' : '@GJS_JS_DIR@:@GJS_JS_NATIVE_DIR@:' + js_dir,
'PATH' : '@MUTTER_BIN_DIR@:' + os.environ.get('PATH', ''),
'GNOME_DISABLE_CRASH_DIALOG' : '1'})
if running_from_source_tree:
env.update({'GNOME_SHELL_DATADIR' : data_dir,
'GI_TYPELIB_PATH' : typelib_dir})
jhbuild_gconf_source = os.path.join('@sysconfdir@', 'gconf/2/path.jhbuild')
if os.path.exists(jhbuild_gconf_source):
env['GCONF_DEFAULT_SOURCE_PATH'] = jhbuild_gconf_source
# Work around Ubuntu xulrunner bug,
# http://bugzilla.gnome.org/show_bug.cgi?id=573413
pkgconfig = subprocess.Popen(['pkg-config', '--variable=sdkdir', 'mozilla-js'],
stdout=subprocess.PIPE)
mozjs_sdkdir = pkgconfig.communicate()[0].strip()
pkgconfig.wait()
if pkgconfig.returncode == 0:
mozjs_libdir = re.sub('-(sdk|devel)', '', mozjs_sdkdir)
if os.path.exists(mozjs_libdir + '/libmozjs.so'):
env['LD_LIBRARY_PATH'] = os.environ.get('LD_LIBRARY_PATH', '') + ':' + mozjs_libdir
# Log everything to stderr (make stderr our "log file")
env['GJS_DEBUG_OUTPUT'] = 'stderr'
if not options.verbose:
# Unless verbose() is specified, only let gjs show errors and
# things that are explicitly logged via log() from javascript
env['GJS_DEBUG_TOPICS'] = 'JS ERROR;JS LOG'
if use_tfp:
# Decide if we need to set LIBGL_ALWAYS_INDIRECT=1 to get the
# texture_from_pixmap extension; we take having the extension
# be supported on both the client and server but not in the
# list of effective extensions as a signal of needing to force
# indirect rendering.
#
# Note that this check would give the wrong answer for Xephyr,
# but since we force !use_tfp there anyway, it doesn't matter.
(server_glx_extensions, client_glx_extensions, glx_extensions) = _get_glx_extensions()
if ("GLX_EXT_texture_from_pixmap" in server_glx_extensions and
"GLX_EXT_texture_from_pixmap" in client_glx_extensions and
(not "GLX_EXT_texture_from_pixmap" in glx_extensions)):
if options.verbose:
print "Forcing indirect GL"
# This is Mesa specific; the NVIDIA proprietary drivers
# drivers use __GL_FORCE_INDIRECT=1 instead. But we don't
# need to force indirect rendering for NVIDIA.
env['LIBGL_ALWAYS_INDIRECT'] = '1'
if options.debug:
debug_command = options.debug_command.split()
args = list(debug_command)
else:
args = []
args.extend(['mutter', '--mutter-plugins=' + plugin])
if options.replace:
args.append('--replace')
if options.sync:
args.append('--sync')
return subprocess.Popen(args, env=env)
def restore_gnome():
# Do imports lazily to save time and memory
import gio
import gconf
# We don't want to start the new gnome-panel in the current
# directory; $HOME is better for stuff launched from it
os.chdir(os.path.expanduser("~"))
def launch_component(gconf_path):
client = gconf.client_get_default()
component = client.get_string(gconf_path)
if component == None or component == "":
return
# See gnome-session/gsm-util.c:gsm_util_find_desktop_file_for_app_name()
# The one difference is that we don't search the autostart directories,
# and just search normal application search path. (Gio doesnt' know
# how to search the autostart dirs, so we'd have to do that ourselves.)
appinfo = None
try:
appinfo = gio.unix.DesktopAppInfo(component + ".desktop")
except:
try:
appinfo = gio.unix.DesktopAppInfo("gnome-" + component + ".desktop")
except:
pass
if appinfo:
appinfo.launch()
launch_component("/desktop/gnome/session/required_components/windowmanager")
launch_component("/desktop/gnome/session/required_components/panel")
# Main program
parser = optparse.OptionParser()
parser.add_option("-r", "--replace", action="store_true",
help="Replace the running metacity/gnome-panel")
parser.add_option("-g", "--debug", action="store_true",
help="Run under a debugger")
parser.add_option("", "--debug-command", metavar="COMMAND",
help="Command to use for debugging (defaults to 'gdb --args')")
parser.add_option("-v", "--verbose", action="store_true")
parser.add_option("", "--sync", action="store_true")
parser.add_option("", "--xephyr", action="store_true",
help="Run a debugging instance inside Xephyr")
parser.add_option("", "--geometry", metavar="GEOMETRY",
help="Specify Xephyr screen geometry",
default="1024x768");
parser.add_option("-w", "--wide", action="store_true",
help="Use widescreen (1280x800) with Xephyr")
parser.add_option("", "--eval-file", metavar="EVAL_FILE",
help="Evaluate the contents of the given JavaScript file")
parser.add_option("", "--create-extension", action="store_true",
help="Create a new GNOME Shell extension")
parser.add_option("", "--version", action="callback", callback=show_version,
help="Display version and exit")
options, args = parser.parse_args()
if args:
parser.print_usage()
sys.exit(1)
if options.create_extension:
import json
print
print '''Name should be a very short (ideally descriptive) string.
Examples are: "Click To Focus", "Adblock", "Shell Window Shrinker".
'''
name = raw_input('Name: ').strip()
print
print '''Description is a single-sentence explanation of what your extension does.
Examples are: "Make windows visible on click", "Block advertisement popups"
"Animate windows shrinking on minimize"
'''
description = raw_input('Description: ').strip()
underifier = re.compile('[^A-Za-z]')
sample_uuid = underifier.sub('_', name)
# TODO use evolution data server
hostname = subprocess.Popen(['hostname'], stdout=subprocess.PIPE).communicate()[0].strip()
sample_uuid = sample_uuid + '@' + hostname
print
print '''Uuid is a globally-unique identifier for your extension.
This should be in the format of an email address (foo.bar@extensions.example.com), but
need not be an actual email address, though it's a good idea to base the uuid on your
email address. For example, if your email address is janedoe@example.com, you might
use an extension title clicktofocus@janedoe.example.com.'''
uuid = raw_input('Uuid [%s]: ' % (sample_uuid, )).strip()
if uuid == '':
uuid = sample_uuid
extension_path = os.path.join(os.path.expanduser('~/.config'), 'gnome-shell', 'extensions', uuid)
if os.path.exists(extension_path):
print "Extension path %r already exists" % (extension_path, )
sys.exit(0)
os.makedirs(extension_path)
meta = { 'name': name,
'description': description,
'uuid': uuid }
f = open(os.path.join(extension_path, 'metadata.json'), 'w')
try:
json.dump(meta, f)
except AttributeError:
# For Python versions older than 2.6, try using the json-py module
f.write(json.write(meta) + '\n')
f.close()
extensionjs_path = os.path.join(extension_path, 'extension.js')
f = open(extensionjs_path, 'w')
f.write('''// Sample extension code, makes clicking on the panel show a message
const St = imports.gi.St;
const Mainloop = imports.mainloop;
const Main = imports.ui.main;
function _showHello() {
let text = new St.Label({ style_class: 'helloworld-label', text: "Hello, world!" });
let monitor = global.get_primary_monitor();
global.stage.add_actor(text);
text.set_position(Math.floor (monitor.width / 2 - text.width / 2), Math.floor(monitor.height / 2 - text.height / 2));
Mainloop.timeout_add(3000, function () { text.destroy(); });
}
// Put your extension initialization code here
function main() {
Main.panel.actor.reactive = true;
Main.panel.actor.connect('button-release-event', _showHello);
}
''')
f.close()
f = open(os.path.join(extension_path, 'stylesheet.css'), 'w')
f.write('''/* Example stylesheet */
.helloworld-label {
font-size: 36px;
font-weight: bold;
color: #ffffff;
background-color: rgba(10,10,10,0.7);
border-radius: 5px;
}
''')
f.close()
subprocess.Popen(['gnome-open', extensionjs_path])
sys.exit(0)
if options.eval_file:
import dbus
f = open(options.eval_file)
contents = f.read()
f.close()
session = dbus.SessionBus()
shell = session.get_object('org.gnome.Shell', '/org/gnome/Shell')
shell = dbus.Interface(shell, 'org.gnome.Shell')
result = shell.Eval(contents)
print result
sys.exit(0)
if options.debug_command:
options.debug = True
elif options.debug:
options.debug_command = "gdb --args"
if options.wide:
options.geometry = "1280x800"
# Figure out whether or not to use GL_EXT_texture_from_pixmap. By default
# we use it iff we aren't running Xephyr, but we allow the user to
# explicitly disable it.
# FIXME: Move this to ClutterGlxPixmap like
# CLUTTER_PIXMAP_TEXTURE_RECTANGLE=disable.
if 'GNOME_SHELL_DISABLE_TFP' in os.environ and \
os.environ['GNOME_SHELL_DISABLE_TFP'] != '':
use_tfp = False
else:
# tfp does not work correctly in Xephyr
use_tfp = not options.xephyr
if options.verbose:
print "Starting shell"
# Handle ssh logins
if 'DISPLAY' not in os.environ:
running_env = get_running_session_environs()
os.environ.update(running_env)
if options.debug:
# Record initial terminal state so we can reset it to that
# later, in case we kill gdb at a bad time
termattrs = termios.tcgetattr(0);
# We only respawn the previous environment on abnormal exit;
# for a clean exit, we assume that gnome-shell was replaced with
# something else.
normal_exit = False
try:
shell = None
if options.xephyr:
xephyr = start_xephyr()
# This makes us not grab the org.gnome.Panel or
# org.freedesktop.Notifications D-Bus names
os.environ['GNOME_SHELL_NO_REPLACE'] = '1'
shell = start_shell()
else:
xephyr = None
shell = start_shell()
# Wait for shell to exit
if options.verbose:
print "Waiting for shell to exit"
shell.wait()
except KeyboardInterrupt, e:
try:
os.kill(shell.pid, signal.SIGKILL)
except:
pass
shell.wait()
finally:
# Clean up Xephyr if it outlived the shell
if xephyr:
try:
os.kill(xephyr.pid, signal.SIGKILL)
except OSError:
pass
if shell is None:
print "Failed to start shell"
elif shell.returncode == 0:
normal_exit = True
if options.verbose:
print "Shell exited normally"
elif shell.returncode < 0:
# Python has no mapping for strsignal; not worth using
# ctypes for this.
print "Shell killed with signal %d" % - shell.returncode
else:
# Normal reason here would be losing connection the X server
if options.verbose:
print "Shell exited with return code %d" % shell.returncode
if options.debug:
termios.tcsetattr(0, termios.TCSANOW, termattrs);
if not options.xephyr and options.replace and not normal_exit:
restore_gnome()
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