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#!/usr/bin/env python

# Copyright 2016 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from __future__ import print_function

import sys
import yaml
import os
import re
import subprocess

errors = 0

os.chdir(os.path.join(os.path.dirname(sys.argv[0]), '../../..'))

# hack import paths to pick up extra code
sys.path.insert(0, os.path.abspath('tools/buildgen/plugins'))
from expand_version import Version

try:
  branch_name = subprocess.check_output(
    'git rev-parse --abbrev-ref HEAD',
    shell=True)
except:
  print('WARNING: not a git repository')
  branch_name = None

if branch_name is not None:
  m = re.match(r'^release-([0-9]+)_([0-9]+)$', branch_name)
  if m:
    print('RELEASE branch')
    # version number should align with the branched version
    check_version = lambda version: (
      version.major == int(m.group(1)) and
      version.minor == int(m.group(2)))
    warning = 'Version key "%%s" value "%%s" should have a major version %s and minor version %s' % (m.group(1), m.group(2))
  elif re.match(r'^debian/.*$', branch_name):
    # no additional version checks for debian branches
    check_version = lambda version: True
  else:
    # all other branches should have a -dev tag
    check_version = lambda version: version.tag == 'dev'
    warning = 'Version key "%s" value "%s" should have a -dev tag'
else:
  check_version = lambda version: True

with open('build.yaml', 'r') as f:
  build_yaml = yaml.load(f.read())

settings = build_yaml['settings']

top_version = Version(settings['version'])
if not check_version(top_version):
  errors += 1
  print(warning % ('version', top_version))

for tag, value in settings.iteritems():
  if re.match(r'^[a-z]+_version$', tag):
    value = Version(value)
    if tag != 'core_version':
      if value.major != top_version.major:
        errors += 1
        print('major version mismatch on %s: %d vs %d' % (tag, value.major,
                                                          top_version.major))
      if value.minor != top_version.minor:
        errors += 1
        print('minor version mismatch on %s: %d vs %d' % (tag, value.minor,
                                                          top_version.minor))
    if not check_version(value):
      errors += 1
      print(warning % (tag, value))

sys.exit(errors)