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Propogate proguard specs from aar_import rule
**Background** bazelbuild#3778 Add support for `proguard.txt` in `aar_import` **Changes** * Add new action and python script to extract `proguard.txt` from an aar if it exists * Add proguard spec to `aar_import` rule's output through a `ProguardSpecProvider` **Test Plan** * Tested with https://github.sc-corp.net/Snapchat/rules_kotlin/pull/71 --- Automatic squash commit from https://github.sc-corp.net/Snapchat/bazel/pull/85 Cooled by bromano
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| # Lint as: python2, python3 | ||
| # pylint: disable=g-direct-third-party-import | ||
| # Copyright 2016 The Bazel Authors. All rights reserved. | ||
| # | ||
| # 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. | ||
|
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| """A tool for extracting proguard spec from an AAR | ||
| An AAR may contain proguard spec at proguard.txt | ||
| """ | ||
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| from __future__ import absolute_import | ||
| from __future__ import division | ||
| from __future__ import print_function | ||
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| import os | ||
| import re | ||
| import sys | ||
| import zipfile | ||
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| # Do not edit this line. Copybara replaces it with PY2 migration helper. | ||
| from absl import app | ||
| from absl import flags | ||
| import six | ||
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| from tools.android import junction | ||
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| FLAGS = flags.FLAGS | ||
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| flags.DEFINE_string("input_aar", None, "Input AAR") | ||
| flags.mark_flag_as_required("input_aar") | ||
| flags.DEFINE_string("output_proguard_file", None, | ||
| "Output parameter file for proguard") | ||
| flags.mark_flag_as_required("output_proguard_file") | ||
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| def ExtractEmbeddedProguard(aar, output): | ||
| proguard_spec = "proguard.txt" | ||
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| if proguard_spec in aar.namelist(): | ||
| output.write(aar.read(proguard_spec)) | ||
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| def _Main(input_aar, output_proguard_file): | ||
| with zipfile.ZipFile(input_aar, "r") as aar: | ||
| with open(output_proguard_file, 'wb') as output: | ||
| ExtractEmbeddedProguard(aar, output) | ||
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| def main(unused_argv): | ||
| if os.name == "nt": | ||
| # Shorten paths unconditionally, because the extracted paths in | ||
| # ExtractEmbeddedJars (which we cannot yet predict, because they depend on | ||
| # the names of the Zip entries) may be longer than MAX_PATH. | ||
| aar_long = os.path.abspath(FLAGS.input_aar) | ||
| proguard_long = os.path.abspath(FLAGS.output_proguard_file) | ||
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| with junction.TempJunction(os.path.dirname(aar_long)) as aar_junc: | ||
| with junction.TempJunction(os.path.dirname(proguard_long)) as proguard_junc: | ||
| _Main( | ||
| os.path.join(aar_junc, os.path.basename(aar_long)), | ||
| os.path.join(proguard_junc, os.path.basename(proguard_long))) | ||
| else: | ||
| _Main(FLAGS.input_aar, FLAGS.output_proguard_file) | ||
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| if __name__ == "__main__": | ||
| FLAGS(sys.argv) | ||
| app.run(main) |
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