meson-cmd-extract.py 2.81 KB
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#!/usr/bin/env python3
# Copyright © 2019 Intel Corporation

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

"""This script reads a meson build directory and gives back the command line it
was configured with.

This only works for meson 0.49.0 and newer.
"""

import argparse
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import ast
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import configparser
import pathlib
import sys


def parse_args() -> argparse.Namespace:
    """Parse arguments."""
    parser = argparse.ArgumentParser()
    parser.add_argument(
        'build_dir',
        help='Path the meson build directory')
    args = parser.parse_args()
    return args


def load_config(path: pathlib.Path) -> configparser.ConfigParser:
    """Load config file."""
    conf = configparser.ConfigParser()
    with path.open() as f:
        conf.read_file(f)
    return conf


def build_cmd(conf: configparser.ConfigParser) -> str:
    """Rebuild the command line."""
    args = []
    for k, v in conf['options'].items():
        if ' ' in v:
            args.append(f'-D{k}="{v}"')
        else:
            args.append(f'-D{k}={v}')
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    cf = conf['properties'].get('cross_file')
    if cf:
        args.append('--cross-file={}'.format(cf))
    nf = conf['properties'].get('native_file')
    if nf:
        # this will be in the form "['str', 'str']", so use ast.literal_eval to
        # convert it to a list of strings.
        nf = ast.literal_eval(nf)
        args.extend(['--native-file={}'.format(f) for f in nf])
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    return ' '.join(args)


def main():
    args = parse_args()
    path = pathlib.Path(args.build_dir, 'meson-private', 'cmd_line.txt')
    if not path.exists():
        print('Cannot find the necessary file to rebuild command line. '
              'Is your meson version >= 0.49.0?', file=sys.stderr)
        sys.exit(1)

    conf = load_config(path)
    cmd = build_cmd(conf)
    print(cmd)


if __name__ == '__main__':
    main()