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//usr/bin/flatpak-coredumpctl

#!/usr/bin/python3
import argparse
import re
import shutil
import sys
import subprocess
import shlex
import tempfile

class CoreDumper():
    def __init__(self):
        self.build_directory = None
        self.app = None
        self.coredumpctl_matches = ""
        self.extra_flatpak_args = ""
        self.gdb_arguments = ""

def clean_args(self):
        if not self.build_directory and not self.app:
            print("Either `--build-directory` or `APP` must be specified.",
                file=sys.stderr)
            return False

return True

def run(self):
        if not shutil.which('coredumpctl'):
            print("'coredumpctl' not present on the system, can't run.",
                  file=sys.stderr)
            sys.exit(1)

# We need access to the host from the sandbox to run.
        flatpak_command = ["flatpak", "build" if self.build_directory else "run", "--filesystem=home",
                           "--filesystem=%s" % tempfile.gettempdir()] + shlex.split(self.extra_flatpak_args)
        if not self.build_directory:
            flatpak_command.extend(["--command=gdb",
                                    '--devel', self.app])
        else:
            flatpak_command.extend([self.build_directory, "gdb"])

with tempfile.NamedTemporaryFile() as coredump:
            with tempfile.NamedTemporaryFile() as stderr:
                subprocess.check_call(["coredumpctl", "dump"] + shlex.split(self.coredumpctl_matches),
                                      stdout=coredump, stderr=stderr)

with open(stderr.name, 'r') as stderrf:
                    stderr = stderrf.read()
                executable, = re.findall(".*Executable: (.*)", stderr)
                if not executable.startswith("/newroot"):
                    print("Executable %s doesn't seem to be a flatpaked application." % executable,
                        file=sys.stderr)
                executable = executable.replace("/newroot", "")
                flatpak_command.extend([executable, coredump.name])
                flatpak_command.extend(shlex.split(self.gdb_arguments))

print('Running: `"%s"`' % '" "'.join(flatpak_command))
                subprocess.check_call(flatpak_command)

if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        "Debug in gdb an application that crashed inside flatpak."
        " It uses (and thus requires) coredumpctl to retrieve the coredump file.")
    parser.add_argument('-b', '--build-directory', default=None,
                        help="The build directory to use. It allows you to retrieve a coredump"
                        " for applications being built")
    parser.add_argument('--extra-flatpak-args', default="",
                        help="Extra argument to pass to flatpak")
    parser.add_argument('app', nargs='?',
                        help='The flatpak application to use. eg. `org.gnome.Epiphany//3.28`.')
    parser.add_argument('-m', '--coredumpctl-matches', default="", nargs="?",
                        help='Coredumpctl matches, see `man coredumpctl` for more information.')
    parser.add_argument('--gdb-arguments', default="",
                        help='Arguments to pass to gdb.')

coredumper = CoreDumper()
    options = parser.parse_args(namespace=coredumper)
    if not coredumper.clean_args():
        parser.print_help()
        sys.exit(1)

coredumper.run()