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#!/usr/bin/env python
# Copyright (C) 2018 The Android Open Source Project
#
# 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 absolute_import
from __future__ import division
from __future__ import print_function
import os
import re
import sys
from codecs import open
PROJECT_ROOT = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
CONFIG_PROTO_ROOTS = [
'protos/perfetto/common/data_source_descriptor.proto',
'protos/perfetto/common/tracing_service_state.proto',
'protos/perfetto/config/trace_config.proto'
]
MERGED_CONFIG_PROTO = 'protos/perfetto/config/perfetto_config.proto'
TRACE_PROTO_ROOTS = CONFIG_PROTO_ROOTS + ['protos/perfetto/trace/trace.proto']
MERGED_TRACE_PROTO = 'protos/perfetto/trace/perfetto_trace.proto'
METRICS_PROTOS_ROOTS = ['protos/perfetto/metrics/metrics.proto']
MERGED_METRICS_PROTO = 'protos/perfetto/metrics/perfetto_merged_metrics.proto'
REPLACEMENT_HEADER = '''
// AUTOGENERATED - DO NOT EDIT
// ---------------------------
// This file has been generated by
// AOSP://external/perfetto/%s
// merging the perfetto config protos.
// This fused proto is intended to be copied in:
// - Android tree, for statsd.
// - Google internal repos.
syntax = "proto2";
package perfetto.protos;
'''
def get_transitive_imports(rel_path, visited):
if rel_path in visited:
return []
visited.add(rel_path)
with open(os.path.join(PROJECT_ROOT, rel_path), 'r', encoding='utf-8') as f:
content = f.read()
imports = re.findall(r'^import "(.*)";\n', content, flags=re.MULTILINE)
res = []
for child in sorted(imports):
res += get_transitive_imports(child, visited)
res += [rel_path]
return res
def merge_protos_content(proto_paths):
root_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
merged_content = REPLACEMENT_HEADER.lstrip() % __file__
added_files = set()
for proto in proto_paths:
if proto in added_files:
continue
added_files.add(proto)
path = os.path.join(root_dir, proto)
with open(path, 'r', encoding='utf-8') as f:
content = f.read()
# Remove header
header = re.match(r'\/(\*|\/)(?:.|\s)*?package .*;\n', content)
header = header.group(0)
content = content[len(header):]
content = re.sub(r'^import.*?\n\n?', '', content, flags=re.MULTILINE)
merged_content += '\n// Begin of %s\n' % proto
merged_content += content
merged_content += '\n// End of %s\n' % proto
definitions_re = r'^ *(?:message|enum) ([A-Z][A-Za-z0-9].*) {'
definitions = re.finditer(definitions_re, merged_content, re.MULTILINE)
types = set((match.group(1) for match in definitions))
# Limitation: |types| doesn't track the nesting of messages, so a reference to
# a nested message (optional One.Two f = 1;) is simplified to its leafmost
# name (Two in this example).
uses_re = r'^( +)(?:repeated)?(?:optional)?\s?'\
r'(?:[A-Z]\w+\.)*([A-Z]\w+)\s+[a-z]\w*\s*=\s*(\d+);'
uses = re.finditer(uses_re, merged_content, re.MULTILINE)
substitutions = []
for use in uses:
everything = use.group(0)
indentation = use.group(1)
used_type = use.group(2)
field_number = use.group(3)
if used_type not in types:
replacement = '{}// removed field with id {}'.format(
indentation, field_number)
substitutions.append((everything, replacement))
for before, after in substitutions:
merged_content = merged_content.replace(before, after)
return merged_content
def merge_protos(root_paths, output_path):
root_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
all_protos = []
for root_path in root_paths:
all_protos += get_transitive_imports(root_path, visited=set())
merged_content = merge_protos_content(all_protos)
out_path = os.path.join(root_dir, output_path)
prev_content = None
if os.path.exists(out_path):
with open(out_path, 'r', encoding='utf-8') as fprev:
prev_content = fprev.read()
if prev_content == merged_content:
return True
if '--check-only' in sys.argv:
return False
print('Updating {}'.format(output_path))
with open(out_path, 'w', encoding='utf-8') as fout:
fout.write(merged_content)
return True
def main():
result = merge_protos(CONFIG_PROTO_ROOTS, MERGED_CONFIG_PROTO)
result &= merge_protos(TRACE_PROTO_ROOTS, MERGED_TRACE_PROTO)
result &= merge_protos(METRICS_PROTOS_ROOTS, MERGED_METRICS_PROTO)
return 0 if result else 1
if __name__ == '__main__':
sys.exit(main())
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