mirror of
https://github.com/encounter/dawn-cmake.git
synced 2025-05-13 10:51:35 +00:00
c48e487998
Previously code generators would unconditionally write the generated files even if they didn't change, causing all many more files to be rebuilt than necessary. Make extract_json.py check the file content to skip writing if it can to fix this. Bug: None Change-Id: I22389444179c9b16a7ccc03ea133a973d419fad3 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/45761 Auto-Submit: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Austin Eng <enga@chromium.org> Commit-Queue: Austin Eng <enga@chromium.org>
45 lines
1.4 KiB
Python
45 lines
1.4 KiB
Python
#!/usr/bin/env python3
|
|
# Copyright 2018 The Dawn Authors
|
|
#
|
|
# 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.
|
|
import os, sys, json
|
|
|
|
if __name__ == "__main__":
|
|
if len(sys.argv) != 3:
|
|
print("Usage: extract_json.py JSON DIR")
|
|
sys.exit(1)
|
|
|
|
with open(sys.argv[1]) as f:
|
|
files = json.loads(f.read())
|
|
|
|
output_dir = sys.argv[2]
|
|
|
|
for (name, content) in files.items():
|
|
output_file = output_dir + os.path.sep + name
|
|
|
|
# Create the output directory if needed.
|
|
directory = os.path.dirname(output_file)
|
|
if not os.path.exists(directory):
|
|
os.makedirs(directory)
|
|
|
|
# Skip writing to the file if it already has the correct content.
|
|
try:
|
|
with open(output_file, 'r') as outfile:
|
|
if outfile.read() == content:
|
|
continue
|
|
except (OSError, EnvironmentError):
|
|
pass
|
|
|
|
with open(output_file, 'w') as outfile:
|
|
outfile.write(content)
|