1# Copyright 2020 gRPC authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14"""Buildgen duplicate source validation plugin.""" 15 16 17def mako_plugin(dictionary): 18 """The exported plugin code for verify_duplicate_sources. 19 20 This validates that a certain set of libraries don't contain 21 duplicate source files which may cause One Definition Rule (ODR) 22 violation. 23 """ 24 errors = [] 25 target_groups = ( 26 ('gpr', 'grpc', 'grpc++'), 27 ('gpr', 'grpc_unsecure', 'grpc++_unsecure'), 28 ) 29 lib_map = {lib['name']: lib for lib in dictionary.get('libs')} 30 for target_group in target_groups: 31 src_map = {} 32 for target in target_group: 33 for src in lib_map[target]['src']: 34 if src.endswith('.cc'): 35 if src in src_map: 36 errors.append( 37 'Source {0} is used in both {1} and {2}'.format( 38 src, src_map[src], target)) 39 else: 40 src_map[src] = target 41 if errors: 42 raise Exception('\n'.join(errors)) 43