#!/usr/bin/python3

# For description and usage, see the argparse options at the end of the file

import argparse

import os

import sys

import yaml

def clone_or_pull(DEST, SYMLINK=False):

    def use_git_to_clone_or_pull_repo():

        # pygit2 is not available for python3 in Leap, use plain git instead

        import subprocess

        if not os.path.exists(DEST):

            os.mkdir(DEST)

        if os.path.isdir(FULL_PATH):

            subprocess.Popen(['git', 'pull'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)

        else:

            subprocess.Popen(['git', 'clone', url, FULL_PATH], stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    def use_pygit2_to_clone_or_pull_repo():

        import pygit2

        if os.path.isdir(FULL_PATH):

            repo = pygit2.Repository(FULL_PATH)

            repo.checkout('HEAD')

        else:

            pygit2.clone_repository(url, FULL_PATH, bare=False)

    for formula, data in FORMULAS.items():

        namespace = data.get('namespace', 'saltstack-formulas')

        prefix = data.get('prefix', '')

        url = 'https://github.com/%s/%s%s-formula' % (namespace, prefix, formula)

        FULL_PATH = '%s/%s-formula' % (DEST, formula)

        use_git_to_clone_or_pull_repo()

        if SYMLINK:

            os.symlink('%s/%s' % (FULL_PATH, formula), '/srv/salt/%s' % formula)

with open('FORMULAS.yaml', 'r') as f:

    FORMULAS = yaml.load(f)

parser = argparse.ArgumentParser(description='Loads the formulas from FORMULAS.yaml and optionally clones them in a specified destination. Optionally it can also create a symlink from the cloned path to /srv/salt, useful for the CI worker.')

parser.add_argument('-c', '--clone', action='store_true', help='Clone the formulas to the destination specified with "--destination". If the repository is already cloned, then it will be pulled/fetched.')

parser.add_argument('-s', '--symlink', action='store_true', help='Creates symlink from the specified destination to /srv/salt.')

requiredArgs = parser.add_argument_group('required arguments')

requiredArgs.add_argument('-d', '--destination', nargs=1, required=True, help='Destination absolute path of the cloned (or to-be-cloned) repositories of the formulas.')

args = parser.parse_args()

if not os.path.isabs(args.destination[0]):

    parser.print_help()

    sys.exit(1)

if args.clone:

    clone_or_pull(args.destination[0], args.symlink)