#!/usr/bin/env python3

#!/usr/bin/env python3
# #############################################################################
# Copyright (c) 2018-present lzutao <taolzu(at)gmail.com>
# All rights reserved.
#
# This source code is licensed under both the BSD-style license (found in the
# LICENSE file in the root directory of this source tree) and the GPLv2 (found
# in the COPYING file in the root directory of this source tree).
# #############################################################################
# This file should be synced with https://github.com/lzutao/meson-symlink

import os
import pathlib # since Python 3.4

def install_symlink(src, dst, install_dir, dst_is_dir=False, dir_mode=0o777):
if not install_dir.exists():
install_dir.mkdir(mode=dir_mode, parents=True, exist_ok=True)
if not install_dir.is_dir():
raise NotADirectoryError(install_dir)

new_dst = install_dir.joinpath(dst)
if new_dst.is_symlink() and os.readlink(new_dst) == src:
print('File exists: {!r} -> {!r}'.format(new_dst, src))
return
print('Installing symlink {!r} -> {!r}'.format(new_dst, src))
new_dst.symlink_to(src, target_is_directory=dst_is_dir)

def main():
import argparse
parser = argparse.ArgumentParser(description='Install a symlink',
usage='{0} [-h] [-d] [-m MODE] source dest install_dir\n\n'
'example:\n'
' {0} dash sh /bin'.format(pathlib.Path(__file__).name))
parser.add_argument('source', help='target to link')
parser.add_argument('dest', help='link name')
parser.add_argument('install_dir', help='installation directory')
parser.add_argument('-d', '--isdir',
action='store_true',
help='dest is a directory')
parser.add_argument('-m', '--mode',
help='directory mode on creating if not exist',
default='0o755')
args = parser.parse_args()

dir_mode = int(args.mode, 8)

meson_destdir = os.environ.get('MESON_INSTALL_DESTDIR_PREFIX', default='')
install_dir = pathlib.Path(meson_destdir, args.install_dir)
install_symlink(args.source, args.dest, install_dir, args.isdir, dir_mode)

if __name__ == '__main__':
main()