#! /usr/bin/env python2


"""Pagure specific hook to block commit not having a 'Signed-off-by'
statement.
"""

from __future__ import print_function, unicode_literals

import os
import sys


if 'PAGURE_CONFIG' not in os.environ \
        and os.path.exists('/etc/pagure/pagure.cfg'):
    os.environ['PAGURE_CONFIG'] = '/etc/pagure/pagure.cfg'


import pagure  # noqa: E402
import pagure.exceptions  # noqa: E402
import pagure.lib.link  # noqa: E402
import pagure.ui.plugins  # noqa: E402

_config = pagure.config.config
abspath = os.path.abspath(os.environ['GIT_DIR'])


def run_as_pre_receive_hook():

    for line in sys.stdin:
        if _config.get('HOOK_DEBUG', False):
            print(line)
        (oldrev, newrev, refname) = line.strip().split(' ', 2)

        if _config.get('HOOK_DEBUG', False):
            print('  -- Old rev')
            print(oldrev)
            print('  -- New rev')
            print(newrev)
            print('  -- Ref name')
            print(refname)

        if set(newrev) == set(['0']):
            print("Deleting a reference/branch, so we won't run the "
                  "hook to block unsigned commits")
            return

        commits = pagure.lib.git.get_revs_between(
            oldrev, newrev, abspath, refname)
        for commit in commits:
            if _config.get('HOOK_DEBUG', False):
                print('Processing commit: %s' % commit)
            signed = False
            for line in pagure.lib.git.read_git_lines(
                    ['log', '--no-walk', commit], abspath):
                if line.lower().strip().startswith('signed-off-by'):
                    signed = True
                    break
            if _config.get('HOOK_DEBUG', False):
                print(' - Commit: %s is signed: %s' % (commit, signed))
            if not signed:
                print("Commit %s is not signed" % commit)
                sys.exit(1)


def main(args):
    run_as_pre_receive_hook()


if __name__ == '__main__':
    main(sys.argv[1:])