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#!/usr/bin/env python
# Copyright 2009-2014 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

import argparse
import sys
import portage

portage._internal_caller = True
from portage import os


def command_recompose(args):

    usage = "usage: recompose <binpkg_path> <metadata_dir>\n"

    if len(args) != 2:
        sys.stderr.write(usage)
        sys.stderr.write("2 arguments are required, got %s\n" % len(args))
        return 1

    binpkg_path, metadata_dir = args

    if not os.path.isfile(binpkg_path):
        sys.stderr.write(usage)
        sys.stderr.write("Argument 1 is not a regular file: '%s'\n" % binpkg_path)
        return 1

    if not os.path.isdir(metadata_dir):
        sys.stderr.write(usage)
        sys.stderr.write("Argument 2 is not a directory: '%s'\n" % metadata_dir)
        return 1

    t = portage.xpak.tbz2(binpkg_path)
    t.recompose(metadata_dir)
    return os.EX_OK


def main(argv):

    if argv and isinstance(argv[0], bytes):
        for i, x in enumerate(argv):
            argv[i] = portage._unicode_decode(x, errors="strict")

    valid_commands = ("recompose",)
    description = "Perform metadata operations on a binary package."
    usage = "usage: %s COMMAND [args]" % os.path.basename(argv[0])

    parser = argparse.ArgumentParser(description=description, usage=usage)
    options, args = parser.parse_known_args(argv[1:])

    if not args:
        parser.error("missing command argument")

    command = args[0]

    if command not in valid_commands:
        parser.error("invalid command: '%s'" % command)

    if command == "recompose":
        rval = command_recompose(args[1:])
    else:
        raise AssertionError("invalid command: '%s'" % command)

    return rval


if __name__ == "__main__":
    rval = main(sys.argv[:])
    sys.exit(rval)