1 files changed, 108 insertions, 0 deletions
diff --git a/lib/python/build_utils.py b/lib/python/build_utils.py
new file mode 100644
index 00000000..14327a90
--- /dev/null
+++ b/lib/python/build_utils.py
@@ -0,0 +1,108 @@
+##############################################################################
+# Copyright (c) 2017 Feng Pan (fpan@redhat.com) and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+import argparse
+import git
+import logging
+import os
+from pygerrit2.rest import GerritRestAPI
+import re
+import shutil
+import sys
+
+
+def clone_fork(args):
+    ref = None
+    logging.info("Cloning {}".format(args.repo))
+
+    try:
+        cm = git.Repo(search_parent_directories=True).commit().message
+    except git.exc.InvalidGitRepositoryError:
+        logging.debug('Current Apex directory is not a git repo: {}'
+                      .format(os.getcwd()))
+        cm = ''
+
+    logging.info("Current commit message: {}".format(cm))
+    m = re.search('{}:\s*(\S+)'.format(args.repo), cm)
+
+    if m:
+        change_id = m.group(1)
+        logging.info("Using change ID {} from {}".format(change_id, args.repo))
+        rest = GerritRestAPI(url=args.url)
+        change_str = "changes/{}?o=CURRENT_REVISION".format(change_id)
+        change = rest.get(change_str)
+        try:
+            assert change['status'] not in 'ABANDONED' 'CLOSED',\
+                'Change {} is in {} state'.format(change_id, change['status'])
+            if change['status'] == 'MERGED':
+                logging.info('Change {} is merged, ignoring...'
+                             .format(change_id))
+            else:
+                current_revision = change['current_revision']
+                ref = change['revisions'][current_revision]['ref']
+                logging.info('setting ref to {}'.format(ref))
+        except KeyError:
+            logging.error('Failed to get valid change data structure from url '
+                          '{}/{}, data returned: \n{}'
+                          .format(change_id, change_str, change))
+            raise
+
+    # remove existing file or directory named repo
+    if os.path.exists(args.repo):
+        if os.path.isdir(args.repo):
+            shutil.rmtree(args.repo)
+        else:
+            os.remove(args.repo)
+
+    ws = git.Repo.clone_from("{}/{}".format(args.url, args.repo),
+                             args.repo, b=args.branch)
+    if ref:
+        git_cmd = ws.git
+        git_cmd.fetch("{}/{}".format(args.url, args.repo), ref)
+        git_cmd.checkout('FETCH_HEAD')
+        logging.info('Checked out commit:\n{}'.format(ws.head.commit.message))
+
+
+def get_parser():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--debug', action='store_true', default=False,
+                        help="Turn on debug messages")
+    subparsers = parser.add_subparsers()
+    fork = subparsers.add_parser('clone-fork',
+                                 help='Clone fork of dependent repo')
+    fork.add_argument('-r', '--repo', required=True, help='Name of repository')
+    fork.add_argument('-u', '--url',
+                      default='https://gerrit.opnfv.org/gerrit',
+                      help='Gerrit URL of repository')
+    fork.add_argument('-b', '--branch',
+                      default='master',
+                      help='Branch to checkout')
+    fork.set_defaults(func=clone_fork)
+    return parser
+
+
+def main():
+    parser = get_parser()
+    args = parser.parse_args(sys.argv[1:])
+    if args.debug:
+        logging_level = logging.DEBUG
+    else:
+        logging_level = logging.INFO
+
+    logging.basicConfig(format='%(asctime)s %(levelname)s: %(message)s',
+                        datefmt='%m/%d/%Y %I:%M:%S %p',
+                        level=logging_level)
+    if hasattr(args, 'func'):
+        args.func(args)
+    else:
+        parser.print_help()
+        exit(1)
+
+if __name__ == "__main__":
+    main()