bootstrap.py

"""This script creates the initial symlinks to the configuration
files.

"""

import json
import os
import os.path
import sys

CWD = os.getcwd()
HOME = os.getenv('HOME')


def link(source_path, link_path):
    file_exists = os.access(link_path, os.F_OK)
    if file_exists and (not os.path.islink(link_path)):
        os.remove(link_path)
        os.symlink(source_path, link_path)

    elif not file_exists:
        os.symlink(source_path, link_path)

    elif file_exists and not os.readlink(link_path) == source_path:
        os.symlink(source_path, link_path)


def main():
    config_dir = os.path.dirname(sys.argv[0])
    links = {}
    with open(os.path.join(config_dir, 'config.json'), 'r') as f:
        try:
            links = json.load(f)
        except ValueError as json_exception:
            print(json_exception, file=sys.stderr)
            sys.exit(1)

    for source, link_name in links.items():
        source_path = os.path.join(CWD, source)
        link_path = os.path.join(HOME, link_name)
        link(source_path, link_path)

if __name__ == '__main__':
    main()