blob: b8e700c80ec289ae9ea22b482d74a2844342e584 [file] [log] [blame]
#!/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
import argparse
import tempfile
import subprocess
import hashlib
import textwrap
SOURCE_TARGET = {
'protos/perfetto/config/perfetto_config.proto':
'src/perfetto_cmd/perfetto_config.descriptor.h',
'protos/perfetto/metrics/metrics.proto':
'src/trace_processor/metrics/metrics.descriptor.h',
}
ROOT_DIR = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
SCRIPT_PATH = 'tools/gen_binary_descriptors'
def hash_path(path):
hash = hashlib.sha1()
with open(os.path.join(ROOT_DIR, path)) as f:
hash.update(f.read())
return hash.hexdigest()
def find_protoc():
for root, dirs, files in os.walk(ROOT_DIR):
if 'protoc' in files:
return os.path.join(root, 'protoc')
for name in ('src', 'buildtools'):
if name in dirs:
dirs.remove(name)
return None
def check(source, target):
assert os.path.exists(os.path.join(ROOT_DIR, target)), \
'Output file {} does not exist and so cannot be checked'.format(target)
with open(target, 'rb') as f:
s = f.read()
hashes = re.findall(r'// SHA1\((.*)\)\n// (.*)\n', s)
assert sorted([SCRIPT_PATH, source]) == sorted([key for key, _ in hashes])
for path, expected_sha1 in hashes:
actual_sha1 = hash_path(os.path.join(ROOT_DIR, path))
assert actual_sha1 == expected_sha1, \
'In {} hash given for {} did not match'.format(target, path)
def generate(source, target, protoc_path):
_, source_name = os.path.split(source)
_, target_name = os.path.split(target)
assert source_name.replace('.proto', '.descriptor.h') == target_name
with tempfile.NamedTemporaryFile() as fdescriptor:
subprocess.check_call([
protoc_path,
'--include_imports',
'--proto_path=protos',
'--descriptor_set_out={}'.format(fdescriptor.name),
source,
], cwd=ROOT_DIR)
s = fdescriptor.read()
proto_name = source_name[:-len('.proto')].title().replace("_", "")
constant_name = 'k' + proto_name + 'Descriptor'
binary = '{' + ', '.join('{0:#04x}'.format(ord(c)) for c in s) + '}'
binary = textwrap.fill(binary,
width=80,
initial_indent=' ',
subsequent_indent=' ')
include_guard = target.replace('/', '_').replace('.', '_').upper() + '_'
with open(os.path.join(ROOT_DIR, target), 'wb') as f:
f.write("""
#ifndef {include_guard}
#define {include_guard}
#include <stddef.h>
#include <stdint.h>
#include <array>
// This file was autogenerated by tools/gen_binary_descriptors. Do not edit.
// SHA1({script_path})
// {script_hash}
// SHA1({source_path})
// {source_hash}
// This is the proto {proto_name} encoded as a ProtoFileDescriptor to allow
// for reflection without libprotobuf full/non-lite protos.
namespace perfetto {{
constexpr std::array<uint8_t, {size}> {constant_name}{{
{binary}}};
}} // namespace perfetto
#endif // {include_guard}
""".format(**{
'proto_name': proto_name,
'size': len(s),
'constant_name': constant_name,
'binary': binary,
'include_guard': include_guard,
'script_path': SCRIPT_PATH,
'script_hash': hash_path(__file__),
'source_path': source,
'source_hash': hash_path(os.path.join(source)),
}))
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--check-only', action='store_true')
parser.add_argument('--protoc')
args = parser.parse_args()
try:
for source, target in SOURCE_TARGET.iteritems():
if args.check_only:
check(source, target)
else:
protoc = args.protoc or find_protoc()
assert protoc, 'protoc not found specific (--protoc PROTOC_PATH)'
assert os.path.exists(protoc), '{} does not exist'.format(protoc)
if protoc is not args.protoc:
print('Using protoc: {}'.format(protoc))
generate(source, target, protoc)
except AssertionError as e:
if not str(e):
raise
print('Error: {}'.format(e))
return 1
if __name__ == '__main__':
exit(main())