| Name: Desugar, transforming Java 8 bytecode to be Java 7 compatible |
| Short Name: desugar |
| URL: https://github.com/bazelbuild/bazel |
| Version: 1.1.0 |
| License: Apache 2.0 |
| Security Critical: no |
| |
| Description: |
| Desugar is a Google-developed open-source Java library used by the build process |
| to transform Java 8 bytecode to Java 7. It is used to enable Java 8 features |
| such as lambda experssions for Chrome on Android. |
| |
| Googlers: See: go/desugar |
| |
| Local Modifications: |
| * Added BUILD.gn, proguard.flags. |
| * Made all lambdas be "stateful" to avoid <clinit> bloat. |
| * Desugar_deploy.jar split into Desugar.jar and Desugar_runtime.jar. |
| * Desugar.jar has been run through r8.jar to remove unused .class files. |
| |
| Update instructions (requires @google.com account for uploading): |
| * Check out Bazel from https://github.com/bazelbuild/bazel |
| * Compile or install Bazel by following instructions on |
| https://docs.bazel.build/versions/master/install.html |
| * Apply stateful-lambdas.patch: |
| git apply $CHROMIUM_SRC/third_party/bazel/desugar/stateful-lambdas.patch |
| * Build Desugar_deploy.jar: |
| bazel build //src/tools/android/java/com/google/devtools/build/android/desugar:Desugar_deploy.jar |
| * Move Desugar_deploy.jar to location within Chromium: |
| rm $CHROMIUM_SRC/third_party/bazel/desugar/Desugar.jar |
| mv bazel-bin/src/tools/android/java/com/google/devtools/build/android/desugar/Desugar_deploy.jar $CHROMIUM_SRC/third_party/bazel/desugar/Desugar.jar |
| * Update Desugar_runtime.jar: |
| unzip Desugar.jar "com/google/devtools/build/android/desugar/runtime*" |
| zip -rD0 Desugar_runtime.jar com |
| rm -r com |
| * Shrink via r8 (optional - reduces size by about 66%). |
| java -jar ../../r8/lib/r8.jar --debug --classfile --output Desugar.new.jar --pg-conf proguard.flags --no-desugaring --lib ../../jdk/extras/java_8/jre/lib/rt.jar Desugar.jar |
| mv Desugar.new.jar Desugar.jar |
| * Perform a sanity check of chrome_public_apk: |
| ninja chrome_public_apk |
| bin/chrome_public_apk run |
| * Update this README.chromium (Version) |
| * Upload new jar to CIPD: |
| cd third_party/bazel |
| cipd create --pkg-def cipd.yaml |
| * Update revision //DEPS |
