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7a43c648c3
Calling out to python from GN to process gypi files is relatively
expensive with a 20-45ms fixed overhead for setup/teardown regardless
of what the script does. This makes runtime/vm/BUILD.gn take 1-1.5s
(per toolchain) to run as the template for libraries expands
out to 25 calls to gypi_to_gn.py, even though the actual time spent
processing the gypi files is negligible.
This replaces those repeated calls to gypi_to_gn.py with a call to a
custom script that process all of the gypi files needed for runtime/vm
and places the results into a single scope which can then be read from
in the template and replaces a few other scattered calls to
gypi_to_gn.py with a smaller number of calls that process multiple
gypi files and place the results into a single scope.
The end result is processing all of dart's GN files in a fuchsia build
takes ~250ms instead of >3 seconds.
R=zra@google.com
Review URL: https://codereview.chromium.org/2472813002 .
Committed: ad86d6ed26
69 lines
2.4 KiB
Python
Executable file
69 lines
2.4 KiB
Python
Executable file
#!/usr/bin/env python
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# Copyright 2016, the Dart project authors. Please see the AUTHORS file
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# for details. All rights reserved. Use of this source code is governed by a
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# BSD-style license that can be found in the LICENSE file.
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import gn_helpers
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import os.path
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import sys
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# Given a list of dart package names read in the set of runtime and sdk library
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# sources into variables in a gn scope.
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def LoadPythonDictionary(path):
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file_string = open(path).read()
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try:
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file_data = eval(file_string, {'__builtins__': None}, None)
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except SyntaxError, e:
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e.filename = path
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raise
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except Exception, e:
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raise Exception('Unexpected error while reading %s: %s' %
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(path, str(e)))
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assert isinstance(
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file_data, dict), '%s does not eval to a dictionary' % path
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return file_data
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def main():
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dart_root_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
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runtime_dir = os.path.join(dart_root_dir, 'runtime')
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runtime_lib_dir = os.path.join(runtime_dir, 'lib')
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sdk_lib_dir = os.path.join(dart_root_dir, 'sdk', 'lib')
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libs = sys.argv[1:]
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data = {}
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data['allsources'] = []
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for lib in libs:
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runtime_path = os.path.join(runtime_lib_dir, lib + '_sources.gypi')
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sdk_path = os.path.join(sdk_lib_dir, lib, lib + '_sources.gypi')
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runtime_dict = LoadPythonDictionary(runtime_path)
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for source in runtime_dict['sources']:
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data['allsources'].append(source)
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data[lib + '_runtime_sources'] = runtime_dict['sources']
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sdk_dict = LoadPythonDictionary(sdk_path)
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data[lib + '_sdk_sources'] = sdk_dict['sources']
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vm_sources_path = os.path.join(runtime_dir, 'vm', 'vm_sources.gypi')
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vm_sources_dict = LoadPythonDictionary(vm_sources_path)
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data['vm_sources'] = vm_sources_dict['sources']
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platform_sources_base = os.path.join(runtime_dir, 'platform', 'platform_')
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platform_headers_dict = LoadPythonDictionary(
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platform_sources_base + 'headers.gypi')
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platform_sources_dict = LoadPythonDictionary(
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platform_sources_base + 'sources.gypi')
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data['platform_sources'] = platform_headers_dict[
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'sources'] + platform_sources_dict['sources']
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bin_io_sources_path = os.path.join(runtime_dir, 'bin', 'io_sources.gypi')
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bin_io_sources_dict = LoadPythonDictionary(bin_io_sources_path)
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data['bin_io_sources'] = bin_io_sources_dict['sources']
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print gn_helpers.ToGNString(data)
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return 0
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if __name__ == '__main__':
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sys.exit(main())
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