# Copyright (C) 2017 Igalia S.L.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser 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 argparse
import logging
try:
    import configparser
except ImportError:
    import ConfigParser as configparser
from contextlib import contextmanager
import errno
import json
import multiprocessing
import os
import shlex
import shutil
import signal
import subprocess
import sys
import tempfile
import re

from webkitpy.common.system.systemhost import SystemHost
from webkitpy.port.factory import PortFactory
from webkitpy.common.system.logutils import configure_logging

try:
    from urllib.parse import urlparse  # pylint: disable=E0611
except ImportError:
    from urlparse import urlparse

try:
    from urllib.request import urlopen  # pylint: disable=E0611
except ImportError:
    from urllib2 import urlopen

FLATPAK_REQ = [
    ("flatpak", "1.4.4"),
]

FLATPAK_VERSION = {}

scriptdir = os.path.abspath(os.path.dirname(__file__))
_log = logging.getLogger(__name__)

FLATPAK_USER_DIR_PATH = os.path.realpath(os.path.join(scriptdir, "../../WebKitBuild", "UserFlatpak"))

class Colors:
    HEADER = "\033[95m"
    OKBLUE = "\033[94m"
    OKGREEN = "\033[92m"
    WARNING = "\033[93m"
    FAIL = "\033[91m"
    ENDC = "\033[0m"


class Console:

    quiet = False

    @classmethod
    def message(cls, str_format, *args):
        if cls.quiet:
            return

        if args:
            print(str_format % args)
        else:
            print(str_format)

        # Flush so that messages are printed at the right time
        # as we use many subprocesses.
        sys.stdout.flush()


def check_flatpak(verbose=True):
    # Flatpak is only supported on Linux.
    if not sys.platform.startswith("linux"):
        return False

    for app, required_version in FLATPAK_REQ:
        try:
            output = subprocess.check_output([app, "--version"])
        except (subprocess.CalledProcessError, OSError):
            if verbose:
                Console.message("\n%sYou need to install %s >= %s"
                                " to be able to use the '%s' script.\n\n"
                                "You can find some informations about"
                                " how to install it for your distribution at:\n"
                                "    * http://flatpak.org/%s\n", Colors.FAIL,
                                app, required_version, sys.argv[0], Colors.ENDC)
            return False

        def comparable_version(version):
            return tuple(map(int, (version.split("."))))

        version = output.decode("utf-8").split(" ")[1].strip("\n")
        current = comparable_version(version)
        FLATPAK_VERSION[app] = current
        if current < comparable_version(required_version):
            Console.message("\n%s%s %s required but %s found."
                            " Please update and try again%s\n", Colors.FAIL,
                            app, required_version, version, Colors.ENDC)
            return False

    return True


class FlatpakObject:

    def __init__(self, user):
        self.user = user

    def flatpak(self, command, *args, **kwargs):
        show_output = kwargs.pop("show_output", False)
        comment = kwargs.pop("comment", None)
        if comment:
            Console.message(comment)

        command = ["flatpak", command]
        if self.user:
            res = subprocess.check_output(command + ["--help"]).decode("utf-8")
            if "--user" in res:
                command.append("--user")
        command.extend(args)

        if not show_output:
            return subprocess.check_output(command).decode("utf-8")

        return subprocess.check_call(command)


class FlatpakPackages(FlatpakObject):

    def __init__(self, repos, user=True):
        FlatpakObject.__init__(self, user=user)

        self.repos = repos

        self.packages = self.__detect_runtimes()

    def __detect_packages(self, *args):
        packs = []
        out = self.flatpak("list", "--columns=application,arch,branch,origin", *args)
        package_defs = [line for line in out.split("\n") if line]
        for package_def in package_defs:
            name, arch, branch, origin = package_def.split("\t")

            # If installed from a file, the package is in no repo
            repo = self.repos.repos.get(origin)

            packs.append(FlatpakPackage(name, branch, repo, arch))

        return packs

    def __detect_runtimes(self):
        return self.__detect_packages("--runtime")

    def __iter__(self):
        for package in self.packages:
            yield package


class FlatpakRepos(FlatpakObject):

    def __init__(self, user=True):
        FlatpakObject.__init__(self, user=user)
        self.repos = {}
        self.update()

    def update(self):
        self.repos = {}
        out = self.flatpak("remote-list", "--columns=name,title,url")
        remotes = [line for line in out.split("\n") if line]
        for remote in remotes:
            name, title, url = remote.split("\t")
            parsed_url = urlparse(url)
            if not parsed_url.scheme:
                Console.message("No valid URI found for: %s", remote)
                continue

            self.repos[name] = FlatpakRepo(name=name, url=url, desc=title, repos=self)

        self.packages = FlatpakPackages(self)

    def add(self, repo, override=True):
        same_name = None
        for name, tmprepo in self.repos.items():
            if repo.url == tmprepo.url:
                return tmprepo
            elif repo.name == name:
                same_name = tmprepo

        if same_name:
            if override:
                self.flatpak("remote-modify", repo.name, "--url=" + repo.url,
                             comment="Setting repo %s URL from %s to %s"
                             % (repo.name, same_name.url, repo.url))
                same_name.url = repo.url

                return same_name
            else:
                return None
        else:
            self.flatpak("remote-add", repo.name, "--from", repo.repo_file.name,
                         "--if-not-exists",
                         comment="Adding repo %s" % repo.name)

        repo.repos = self
        return repo


class FlatpakRepo(FlatpakObject):

    def __init__(self, name, desc=None, url=None,
                 repo_file=None, user=True, repos=None):
        FlatpakObject.__init__(self, user=user)

        self.name = name
        self.url = url
        self.desc = desc
        self.repo_file_name = repo_file
        self._repo_file = None
        self.repos = repos
        assert name
        if repo_file and not url:
            repo = configparser.ConfigParser()
            repo.read(self.repo_file.name)
            try:
                self.url = repo["Flatpak Repo"]["Url"]
            except AttributeError:
                self.url = repo.get("Flatpak Repo", "Url")
        else:
            assert url

    @property
    def repo_file(self):
        if self._repo_file:
            return self._repo_file

        assert self.repo_file_name
        self._repo_file = tempfile.NamedTemporaryFile(mode="wb")
        self._repo_file.write(urlopen(self.repo_file_name).read())
        self._repo_file.flush()

        return self._repo_file


class FlatpakPackage(FlatpakObject):
    """A flatpak app."""

    def __init__(self, name, branch, repo, arch, user=True, hash=None):
        FlatpakObject.__init__(self, user=user)

        self.name = name
        self.branch = str(branch)
        self.repo = repo
        self.arch = arch
        self.hash = hash

    def __repr__(self):
        return "%s/%s/%s %s" % (self.name, self.arch, self.branch, self.repo.name)

    def __str__(self):
        return "%s/%s/%s" % (self.name, self.arch, self.branch)

    def is_installed(self, branch):
        if not self.repo:
            # Bundle installed from file
            return True

        self.repo.repos.update()
        for package in self.repo.repos.packages:
            if package.name == self.name and \
                    package.branch == branch and \
                    package.arch == self.arch:
                return True

        return False

    def install(self):
        if not self.repo:
            return False

        args = ["install", self.repo.name, self.name, "--reinstall", self.branch, "--assumeyes"]
        comment = "Installing from " + self.repo.name + " " + self.name + " " + self.arch + " " + self.branch
        self.flatpak(*args, show_output=True, comment=comment)
        if self.hash:
            args = ["update", "--commit", self.hash, self.name]
            comment = "Updating to %s" % self.hash
            self.flatpak(*args, show_output=True, comment=comment)

    def update(self):
        if not self.is_installed(self.branch):
            return self.install()

        extra_args = []
        comment = "Updating %s" % self.name
        if self.hash:
            extra_args = ["--commit", self.hash]
            comment += " to %s" % self.hash

        extra_args.append("--assumeyes")

        self.flatpak("update", self.name, self.branch, show_output=True,
                     *extra_args, comment=comment)


@contextmanager
def disable_signals(signals=[signal.SIGINT]):
    old_signal_handlers = []

    for disabled_signal in signals:
        old_signal_handlers.append((disabled_signal, signal.getsignal(disabled_signal)))
        signal.signal(disabled_signal, signal.SIG_IGN)

    yield

    for disabled_signal, previous_handler in old_signal_handlers:
        signal.signal(disabled_signal, previous_handler)


class WebkitFlatpak:

    @staticmethod
    def load_from_args(args=None, add_help=True):
        self = WebkitFlatpak()

        parser = argparse.ArgumentParser(prog="webkit-flatpak", add_help=add_help)
        general = parser.add_argument_group("General")
        general.add_argument('--verbose', action='store_true',
                             help='Show debug message')
        general.add_argument("--debug",
                             help="Compile with Debug configuration, also installs Sdk debug symboles.",
                             action="store_true")
        general.add_argument("--release", help="Compile with Release configuration.", action="store_true")
        general.add_argument('--platform', action='store', help='Platform to use (e.g., "mac-lion")'),
        general.add_argument('--gtk', action='store_const', dest='platform', const='gtk',
                             help='Alias for --platform=gtk')
        general.add_argument('--wpe', action='store_const', dest='platform', const='wpe',
                             help=('Alias for --platform=wpe'))
        general.add_argument("-nf", "--no-flatpak-update", dest="no_flatpak_update",
                             action="store_true",
                             help="Do not update flaptak runtime/sdk")
        general.add_argument("-u", "--update", dest="update",
                             action="store_true",
                             help="Update the runtime/sdk/app and rebuild the development environment if needed")
        general.add_argument("-b", "--build-webkit", dest="build_webkit",
                             action="store_true",
                             help="Force rebuilding the app.")
        general.add_argument("-bgst", "--build-gst", dest="build_gst",
                             action="store_true",
                             help="Force rebuilding gst-build, repository path is defined by the `GST_BUILD_PATH` environment variable.")
        general.add_argument("-q", "--quiet", dest="quiet",
                             action="store_true",
                             help="Do not print anything")
        general.add_argument("-t", "--tests", dest="run_tests",
                             nargs=argparse.REMAINDER,
                             help="Run LayoutTests")
        general.add_argument("-c", "--command",
                             nargs=argparse.REMAINDER,
                             help="The command to run in the sandbox",
                             dest="user_command")
        general.add_argument('--available', action='store_true', dest="check_available", help='Check if required dependencies are available.'),
        general.add_argument("--use-icecream", dest="use_icecream", help="Use the distributed icecream (icecc) compiler.", action="store_true")

        debugoptions = parser.add_argument_group("Debugging")
        debugoptions.add_argument("--gdb", nargs="?", help="Activate gdb, passing extra args to it if wanted.")
        debugoptions.add_argument("--gdb-stack-trace", dest="gdb_stack_trace", nargs="?",
                                  help="Dump the stacktrace to stdout. The argument is a timestamp to be parsed by coredumpctl.")
        debugoptions.add_argument("-m", "--coredumpctl-matches", default="", help='Arguments to pass to gdb.')

        buildoptions = parser.add_argument_group("Extra build arguments")
        buildoptions.add_argument("--makeargs", help="Optional Makefile flags")
        buildoptions.add_argument("--cmakeargs",
                                  help="One or more optional CMake flags (e.g. --cmakeargs=\"-DFOO=bar -DCMAKE_PREFIX_PATH=/usr/local\")")

        general.add_argument("--clean", dest="clean", action="store_true",
                             help="Clean previous builds and restart from scratch")

        _, self.args = parser.parse_known_args(args=args, namespace=self)

        if os.environ.get('CCACHE_PREFIX') == 'icecc':
            self.use_icecream = True

        return self

    def __init__(self):
        self.sdk_repo = None
        self.runtime = None
        self.locale = None
        self.sdk = None
        self.app = None

        self.verbose = False
        self.quiet = False
        self.update = False
        self.args = []
        self.finish_args = None
        self.gdb_stack_trace = False

        self.no_flatpak_update = False
        self.release = False
        self.debug = False
        self.clean = False
        self.run_tests = None
        self.source_root = os.path.normpath(os.path.abspath(os.path.join(scriptdir, '../../')))
        # Where the source folder is mounted inside the sandbox.
        self.sandbox_source_root = "/app/webkit"

        self.build_webkit = False
        self.build_gst = False
        self.build_all = False

        self.sdk_branch = "0.1"
        self.platform = "gtk"
        self.build_type = "Release"
        self.manifest_path = None
        self.name = None
        self.build_name = None
        self.flatpak_root_path = None
        self.cache_path = None
        self.app_module = None
        self.flatpak_default_args = []
        self.check_available = False

        # Default application to run in the sandbox
        self.command = None
        self.user_command = []

        # debug options
        self.gdb = None
        self.coredumpctl_matches = ""

        # Extra build options
        self.cmakeargs = ""
        self.makeargs = ""

        self.use_icecream = False
        self.icc_version = None

    def clean_args(self):
        os.environ["FLATPAK_USER_DIR"] = os.environ.get("WEBKIT_FLATPAK_USER_DIR", FLATPAK_USER_DIR_PATH)
        try:
            os.makedirs(os.environ["FLATPAK_USER_DIR"])
        except OSError as e:
            pass

        configure_logging(logging.DEBUG if self.verbose else logging.INFO)
        _log.debug("Using flatpak user dir: %s" % os.environ["FLATPAK_USER_DIR"])

        if not self.debug and not self.release:
            factory = PortFactory(SystemHost())
            port = factory.get(self.platform)
            self.debug = port.default_configuration() == "Debug"

        self.build_type = "Debug" if self.debug else "Release"

        self.platform = self.platform.upper()

        if self.gdb is None and '--gdb' in sys.argv:
            self.gdb = ""

        self.command = "%s %s %s" % (os.path.join(self.sandbox_source_root,
                                                  "Tools/Scripts/run-minibrowser"),
                                     "--" + self.platform.lower(),
                                     " --debug" if self.debug else " --release")

        self.flatpak_build_path = os.environ["FLATPAK_USER_DIR"]

        build_root = os.path.join(self.source_root, 'WebKitBuild')
        self.build_path = os.path.join(build_root, self.platform, self.build_type)
        try:
            os.makedirs(self.build_path)
        except OSError as e:
            if e.errno != errno.EEXIST:
                raise e
        self.config_file = os.path.join(self.flatpak_build_path, 'webkit_flatpak_config.json')

        Console.quiet = self.quiet
        if not check_flatpak():
            return False

        self.finish_args = []
        self.repos = FlatpakRepos()
        self.sdk_repo = self.repos.add(
            FlatpakRepo("webkit-sdk",
                        url="https://software.igalia.com/webkit-sdk-repo/",
                        repo_file="https://software.igalia.com/flatpak-refs/webkit-sdk.flatpakrepo")
        )

        try:
            with open(self.config_file) as config:
                json_config = json.load(config)
                self.icc_version = json_config['icecc_version']
        except IOError as e:
            pass

        return True

    def setup_builddir(self, **kwargs):
        if os.path.exists(os.path.join(self.flatpak_build_path, "metadata")):
            return

        self.sdk_repo.flatpak("build-init",
                              self.flatpak_build_path,
                              "org.webkit.Webkit",
                              str(self.sdk),
                              str(self.runtime),
                              self.sdk.branch,
                              show_output="stdout" in kwargs.keys())

    def setup_gstbuild(self, building):
        gst_dir = os.environ.get('GST_BUILD_PATH')
        if not gst_dir:
            return []

        if not os.path.exists(os.path.join(gst_dir, 'gst-env.py')):
            raise RuntimeError('GST_BUILD_PATH set to %s but it doesn\'t seem to be a valid `gst-build` checkout.' % gst_dir)

        gst_builddir = os.path.join(self.sandbox_source_root, "WebKitBuild", 'gst-build')
        if not os.path.exists(os.path.join(self.source_root, 'WebKitBuild', 'gst-build', 'build.ninja')):
            if not building:
                raise RuntimeError('Trying to enter gst-build env from %s but it is not built, make sure to rebuild webkit.' % gst_dir)

            Console.message("Running meson for `gst-build` %s ", gst_dir)
            self.run_in_sandbox('meson', gst_dir, gst_builddir, building_gst=True)

        if not building:
            return [os.path.join(gst_dir, 'gst-env.py'), '--builddir', gst_builddir, '--srcdir', gst_dir]

        Console.message("Building `gst-build` %s ", gst_dir)
        if self.run_in_sandbox('ninja', '-C', gst_builddir, building_gst=True) != 0:
            raise RuntimeError('Error while building gst-build.')

        return [os.path.join(gst_dir, 'gst-env.py'), '--builddir', gst_builddir, '--srcdir', gst_dir]

    def run_in_sandbox(self, *args, **kwargs):
        self.setup_builddir(stdout=kwargs.get("stdout", sys.stdout))
        cwd = kwargs.pop("cwd", None)
        extra_env_vars = kwargs.pop("env", {})
        stdout = kwargs.pop("stdout", sys.stdout)
        extra_flatpak_args = kwargs.pop("extra_flatpak_args", [])

        if not isinstance(args, list):
            args = list(args)

        if args:
            if os.path.exists(args[0]):
                command = os.path.normpath(os.path.abspath(args[0]))
                # Take into account the fact that the webkit source dir is remounted inside the sandbox.
                args[0] = command.replace(self.source_root, self.sandbox_source_root)
            if args[0].endswith("build-webkit"):
                args.append("--prefix=/app")
        building = os.path.basename(args[0]).startswith("build")

        sandbox_build_path = os.path.join(self.sandbox_source_root, "WebKitBuild", self.build_type)
        # FIXME: Using the `run` flatpak command would be better, but it doesn't
        # have a --bind-mount option.
        flatpak_command = ["flatpak", "build",
                           "--die-with-parent",
                           "--talk-name=org.a11y.Bus",
                           "--talk-name=org.gtk.vfs",
                           "--talk-name=org.gtk.vfs.*",
                           "--bind-mount=/run/shm=/dev/shm",
                           # Access to /run/host is required by the crash log reporter.
                           "--bind-mount=/run/host/%s=%s" % (tempfile.gettempdir(), tempfile.gettempdir()),
                           # flatpak build doesn't expose a --socket option for
                           # white-listing the systemd journal socket. So
                           # white-list it in /run, hoping this is the right
                           # path.
                           "--bind-mount=/run/systemd/journal=/run/systemd/journal",
                           "--bind-mount=%s=%s" % (self.sandbox_source_root, self.source_root),
                           # We mount WebKitBuild/PORTNAME/BuildType to /app/webkit/WebKitBuild/BuildType
                           # so we can build WPE and GTK in a same source tree.
                           "--bind-mount=%s=%s" % (sandbox_build_path, self.build_path)]

        forwarded = {
            "WEBKIT_TOP_LEVEL": "/app/",
            "TEST_RUNNER_INJECTED_BUNDLE_FILENAME": os.path.join(sandbox_build_path, "lib/libTestRunnerInjectedBundle.so"),
        }

        if not building:
            flatpak_command.extend([
                "--device=all",
                "--device=dri",
                "--filesystem=host",
                "--share=ipc",
                "--share=network",
                "--socket=pulseaudio",
                "--socket=system-bus",
                "--socket=wayland",
                "--socket=x11",
                "--system-talk-name=org.a11y.Bus",
                "--system-talk-name=org.freedesktop.GeoClue2",
                "--talk-name=org.a11y.Bus",
                "--talk-name=org.freedesktop.Flatpak"
            ])

            forwarded.update({
                "TZ": "PST8PDT",
                "LANG": "en_US.UTF-8"
            })

        env_var_prefixes_to_keep = [
            "G",
            "GIGACAGE",
            "GST",
            "GTK",
            "ICECC",
            "JSC",
            "WEBKIT",
            "WEBKIT2",
            "WPE",
        ]

        env_var_suffixes_to_keep = [
            "JSC_ARGS",
            "WEBKIT_ARGS",
        ]

        env_vars_to_keep = [
            "CC",
            "CCACHE_PREFIX",
            "CFLAGS",
            "CXX",
            "CXXFLAGS",
            "DISPLAY",
            "JavaScriptCoreUseJIT",
            "LANG",
            "LDFLAGS",
            "Malloc",
            "GPU_PROCESS_CMD_PREFIX",
            "NETWORK_PROCESS_CMD_PREFIX",
            "NUMBER_OF_PROCESSORS",
            "PLUGIN_PROCESS_CMD_PREFIX",
            "QML2_IMPORT_PATH",
            "WAYLAND_DISPLAY",
            "WAYLAND_SOCKET",
            "WEB_PROCESS_CMD_PREFIX"
        ]

        env_vars = os.environ
        env_vars.update(extra_env_vars)
        for envvar, value in env_vars.items():
            var_tokens = envvar.split("_")
            if var_tokens[0] in env_var_prefixes_to_keep or envvar in env_vars_to_keep or var_tokens[-1] in env_var_suffixes_to_keep:
                forwarded[envvar] = value

        if self.use_icecream:
            _log.debug('Enabling the icecream compiler')
            flatpak_command.extend(["--share=network",
                                    "--bind-mount=/var/run/icecc=/var/run/icecc"])

            n_cores = multiprocessing.cpu_count() * 3
            _log.debug('Following icecream recommendation for the number of cores to use: %d' % n_cores)
            forwarded.update({
                "CCACHE_PREFIX": "icecc",
                "ICECC_VERSION": self.icc_version,
                "NUMBER_OF_PROCESSORS": n_cores,
            })

        for envvar, value in forwarded.items():
            flatpak_command.append("--env=%s=%s" % (envvar, value))

        gst_env = []
        if not kwargs.get('building_gst'):
            gst_env = self.setup_gstbuild(building)
        flatpak_command += self.finish_args + extra_flatpak_args + \
            [self.flatpak_build_path] + gst_env + args

        _log.debug('Running in sandbox: %s\n' % ' '.join(flatpak_command))

        try:
            subprocess.check_call(flatpak_command, stdout=stdout)
        except subprocess.CalledProcessError as e:
            sys.stderr.write(str(e) + "\n")
            return e.returncode
        except KeyboardInterrupt:
            return 0

        return 0

    def run(self):
        if self.check_available:
            return 0

        if not self.clean_args():
            return 1

        if self.clean:
            if os.path.exists(self.flatpak_build_path):
                shutil.rmtree(self.flatpak_build_path)
            if os.path.exists(self.build_path):
                shutil.rmtree(self.build_path)

        if self.update:
            Console.message("Updating Flatpak %s environment" % self.build_type)
            if not self.no_flatpak_update:
                self.update_all()

        return self.setup_dev_env()

    def has_environment(self):
        return os.path.exists(self.flatpak_build_path)

    def save_config(self):
        with open(self.config_file, 'w') as config:
            json_config = {'icecc_version': self.icc_version}
            json.dump(json_config, config)

    def setup_icecc(self):
        with tempfile.NamedTemporaryFile() as tmpfile:
            self.run_in_sandbox('icecc', '--build-native', stdout=tmpfile, cwd=self.source_root)
            tmpfile.flush()
            tmpfile.seek(0)
            icc_version_filename, = re.findall(r'.*creating (.*)', tmpfile.read())
            self.icc_version = os.path.join(self.source_root, icc_version_filename)

    def setup_dev_env(self):
        if not os.path.exists(os.path.join(self.flatpak_build_path, "runtime", "org.webkit.Sdk")) or self.update or self.build_all:
            self.install_all()
            self.setup_icecc()
            self.save_config()

        build_type = "--debug" if self.debug else "--release"
        if self.build_gst:
            self.setup_gstbuild(True)

        if self.build_webkit:
            builder = [
                os.path.join(self.sandbox_source_root, 'Tools/Scripts/build-webkit'),
                build_type, '--' + self.platform.lower()]
            if self.makeargs:
                builder.append("--makeargs=%s" % self.makeargs)
            if self.cmakeargs:
                builder.append("--cmakeargs=%s" % self.cmakeargs)
            Console.message("Building webkit")
            res = self.run_in_sandbox(*builder)

            if res:
                return res

        if self.run_tests is not None:
            test_launcher = [os.path.join(self.sandbox_source_root, 'Tools/Scripts/run-webkit-tests'),
                             build_type, '--' + self.platform.lower()] + self.run_tests
            return self.run_in_sandbox(*test_launcher)
        elif self.gdb or self.gdb_stack_trace:
            return self.run_gdb()
        elif self.user_command:
            return self.run_in_sandbox(*self.user_command)
        elif not self.update and not self.build_webkit and not self.build_gst:
            return self.run_in_sandbox()

        return 0

    def _get_packages(self):
        self.runtime = FlatpakPackage("org.webkit.Platform", self.sdk_branch,
                                      self.sdk_repo, "x86_64")
        self.locale = FlatpakPackage("org.webkit.Platform.Locale", self.sdk_branch,
                                     self.sdk_repo, "x86_64")
        self.sdk = FlatpakPackage("org.webkit.Sdk", self.sdk_branch,
                                  self.sdk_repo, "x86_64")
        packages = [self.runtime, self.locale, self.sdk]

        # FIXME: For unknown reasons, the GL extension needs to be explicitely
        # installed for Flatpak 1.2.x to be able to make use of it. Seems like
        # it's not correctly inheriting it from the SDK.
        self.flathub_repo = self.repos.add(
            FlatpakRepo("flathub", repo_file="https://dl.flathub.org/repo/flathub.flatpakrepo")
        )
        gl_extension = FlatpakPackage("org.freedesktop.Platform.GL.default", "19.08",
                                      self.flathub_repo, "x86_64")
        packages.append(gl_extension)

        if self.debug:
            sdk_debug = FlatpakPackage('org.webkit.Sdk.Debug', self.sdk_branch,
                                       self.sdk_repo, "x86_64")
            packages.append(sdk_debug)
        return packages

    def install_all(self):
        if os.path.exists(os.path.join(self.flatpak_build_path, "runtime", "org.webkit.Sdk")):
            return
        Console.message("Installing %s dependencies in %s", self.build_type, self.flatpak_build_path)
        for package in self._get_packages():
            if not package.is_installed(self.sdk_branch):
                package.install()

    def update_all(self):
        self.sdk_repo.flatpak("update")

    def run_gdb(self):
        with disable_signals():
            try:
                subprocess.check_output(['which', 'coredumpctl'])
            except subprocess.CalledProcessError as e:
                sys.stderr.write("'coredumpctl' not present on the system, can't run. (%s)\n" % e)
                return e.returncode

        # We need access to the host from the sandbox to run.
        with tempfile.NamedTemporaryFile() as coredump:
            with tempfile.NamedTemporaryFile() as stderr:
                if self.gdb_stack_trace:
                    cmd = ["coredumpctl", "--since=%s" % self.gdb_stack_trace, "dump"]
                else:
                    cmd = ["coredumpctl", "dump"] + shlex.split(self.coredumpctl_matches)
                try:
                    subprocess.check_call(cmd, stdout=coredump, stderr=stderr)
                except subprocess.CalledProcessError as err:
                    with open(stderr.name, 'r') as stderrf:
                        stderr = stderrf.read()
                    cmd = ' '.join(err.cmd)
                    sys.stderr.write("'%s' returned a non-zero exit code. Stderr: %s" % (cmd, stderr))
                    return err.returncode

                with open(stderr.name, 'r') as stderrf:
                    stderr = stderrf.read()

                executable, = re.findall(".*Executable: (.*)", stderr)

                if self.gdb:
                    bargs = ["gdb", executable, "/run/host/%s" % coredump.name] + shlex.split(self.gdb)
                elif self.gdb_stack_trace:
                    bargs = ["gdb", '-ex', "thread apply all backtrace", '--batch', executable, "/run/host/%s" % coredump.name]

                return self.run_in_sandbox(*bargs)

def is_sandboxed():
    return os.path.exists("/.flatpak-info")


def run_in_sandbox_if_available(args):
    if not os.path.isdir(FLATPAK_USER_DIR_PATH):
        return None

    if is_sandboxed():
        return None

    if not check_flatpak(verbose=False):
        return None

    flatpak_runner = WebkitFlatpak.load_from_args(args, add_help=False)
    if not flatpak_runner.clean_args():
        return None

    if not flatpak_runner.has_environment():
        return None

    sys.exit(flatpak_runner.run_in_sandbox(*args))