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59e7fad99b
Chromium's BUILD files try to avoid uses of exec_script when possible because they slow down every GN invocation. In preparation for building Dawn inside Chromium, the calls to exec_script for the code generator are removed. In GN, the generator now outputs a "JSON tarball", a dictionnary mapping filenames to content. This allows us to use the "depfile" feature of GN to avoid the exec_script call to gather the script's inputs. Outputs of the generator are now listed in the BUILD.gn files. To keep it in sync with the generator, GN outputs a file containing "expected outputs" that is checked by the code generator. Finally the dawn_generator GN template doesn't create a target anymore, but users are expected to gather outputs using get_target_outputs.
36 lines
1.1 KiB
Python
36 lines
1.1 KiB
Python
#!/usr/bin/env python2
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# Copyright 2018 The Dawn Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os, sys, json
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if __name__ == "__main__":
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if len(sys.argv) != 3:
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print("Usage: extract_json.py JSON DIR")
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sys.exit(1)
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with open(sys.argv[1]) as f:
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files = json.loads(f.read())
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output_dir = sys.argv[2]
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for (name, content) in files.iteritems():
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output_file = output_dir + os.path.sep + name
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directory = os.path.dirname(output_file)
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if not os.path.exists(directory):
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os.makedirs(directory)
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with open(output_file, 'w') as outfile:
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outfile.write(content)
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