75 lines
2.5 KiB
Python
75 lines
2.5 KiB
Python
#!/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).
|
|
# #############################################################################
|
|
|
|
import os
|
|
import pathlib # since Python 3.4
|
|
|
|
|
|
def prepend_destdir(path):
|
|
"""prepend_destdir(path) -> Path
|
|
|
|
Needed because pathlib.Path.joinpath() discards the first path if the
|
|
second one is absolute, which is usually the case here.
|
|
"""
|
|
path = pathlib.Path(path)
|
|
DESTDIR = os.environ.get('DESTDIR')
|
|
|
|
if DESTDIR:
|
|
if not path.is_absolute():
|
|
raise Exception('{!r} must be an absolute path when DESTDIR is set'.format(path))
|
|
|
|
path = pathlib.Path(DESTDIR).joinpath(*path.resolve().parts[1:])
|
|
return path
|
|
|
|
|
|
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='InstallSymlink.py [-h] [-d] [-m MODE] src dst install_dir\n\n'
|
|
'example:\n'
|
|
'\tInstallSymlink.py dash sh /bin\n'
|
|
'\tDESTDIR=./staging InstallSymlink.py dash sh /bin')
|
|
parser.add_argument('src', help='target to link')
|
|
parser.add_argument('dst', help='link name')
|
|
parser.add_argument('install_dir', help='installation directory')
|
|
parser.add_argument('-d', '--isdir',
|
|
action='store_true',
|
|
help='dst is a directory')
|
|
parser.add_argument('-m', '--mode',
|
|
help='directory mode on creating if not exist',
|
|
default='0o777')
|
|
args = parser.parse_args()
|
|
|
|
src = args.src
|
|
dst = args.dst
|
|
dst_is_dir = args.isdir
|
|
dir_mode = int(args.mode, 8)
|
|
|
|
install_dir = prepend_destdir(args.install_dir)
|
|
install_symlink(src, dst, install_dir, dst_is_dir, dir_mode)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|