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1#!/usr/bin/env python2.7
2# Copyright 2015 gRPC authors.
3#
4# Licensed under the Apache License, Version 2.0 (the "License");
5# you may not use this file except in compliance with the License.
6# You may obtain a copy of the License at
7#
8#     http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15
16
17"""Generates the appropriate build.json data for all the proto files."""
18import yaml
19import collections
20import os
21import re
22import sys
23
24def update_deps(key, proto_filename, deps, deps_external, is_trans, visited):
25  if not proto_filename in visited:
26    visited.append(proto_filename)
27    with open(proto_filename) as inp:
28      for line in inp:
29        imp = re.search(r'import "([^"]*)"', line)
30        if not imp: continue
31        imp_proto = imp.group(1)
32        # This indicates an external dependency, which we should handle
33        # differently and not traverse recursively
34        if imp_proto.startswith('google/'):
35          if key not in deps_external:
36            deps_external[key] = []
37          deps_external[key].append(imp_proto[:-6])
38          continue
39        if key not in deps: deps[key] = []
40        deps[key].append(imp_proto[:-6])
41        if is_trans:
42          update_deps(key, imp_proto, deps, deps_external, is_trans, visited)
43
44def main():
45  proto_dir = os.path.abspath(os.path.dirname(sys.argv[0]))
46  os.chdir(os.path.join(proto_dir, '../..'))
47
48  deps = {}
49  deps_trans = {}
50  deps_external = {}
51  deps_external_trans = {}
52  for root, dirs, files in os.walk('src/proto'):
53    for f in files:
54      if f[-6:] != '.proto': continue
55      look_at = os.path.join(root, f)
56      deps_for = look_at[:-6]
57      # First level deps
58      update_deps(deps_for, look_at, deps, deps_external, False, [])
59      # Transitive deps
60      update_deps(deps_for, look_at, deps_trans, deps_external_trans, True, [])
61
62  json = {
63    'proto_deps': deps,
64    'proto_transitive_deps': deps_trans,
65    'proto_external_deps': deps_external,
66    'proto_transitive_external_deps': deps_external_trans
67  }
68
69  print yaml.dump(json)
70
71if __name__ == '__main__':
72  main()
73