|tagger||Søren Gjesse <email@example.com>||Mon Mar 09 10:35:47 2020 +0100|
|author||Ian Zerny <firstname.lastname@example.org>||Tue Nov 05 20:37:36 2019 +0100|
|committer||Ian Zerny <email@example.com>||Tue Nov 05 19:38:36 2019 +0000|
Version 1.6.48 Cherry pick: Revert changes to JasminBuilder CL: https://r8-review.googlesource.com/c/r8/+/45191 Cherry pick: Add support for dumping to a directory and continuing compilation. CL: https://r8-review.googlesource.com/c/r8/+/45175 Cherry pick: Add tests and support for data resources to the dump file. CL: https://r8-review.googlesource.com/c/r8/+/45167 Cherry pick: Add duplicate entries to the dump test. CL: https://r8-review.googlesource.com/c/r8/+/45163 Cherry pick: Add support for reading a dump file. CL: https://r8-review.googlesource.com/c/r8/+/45162 Cherry pick: Move dump utilities into AndroidApp. CL: https://r8-review.googlesource.com/c/r8/+/45101 Change-Id: Ia22756fe323429b2275122ce7bc2f5055ab95550
The R8 repo contains two tools:
D8 is a replacement for the DX dexer and R8 is a replacement for the Proguard shrinking and minification tool.
The R8 project uses
depot_tools from the chromium project to manage dependencies. Install
depot_tools and add it to your path before proceeding.
The R8 project uses Java 8 language features and requires a Java 8 compiler and runtime system.
Typical steps to download and build:
$ git clone https://r8.googlesource.com/r8 $ cd r8 $ tools/gradle.py d8 r8
tools/gradle.py script will bootstrap using depot_tools to download a version of gradle to use for building on the first run. This will produce two jar files:
The D8 dexer has a simple command-line interface with only a few options.
The most important option is whether to build in debug or release mode. Debug is the default mode and includes debugging information in the resulting dex files. Debugging information contains information about local variables used when debugging dex code. This information is not useful when shipping final Android apps to users and therefore, final builds should use the
--release flag to remove this debugging information to produce smaller dex files.
Typical invocations of D8 to produce dex file(s) in the out directoy:
Debug mode build:
$ java -jar build/libs/d8.jar --output out input.jar
Release mode build:
$ java -jar build/libs/d8.jar --release --output out input.jar
The full set of D8 options can be obtained by running the command line tool with the
R8 is a Proguard replacement for whole-program optimization, shrinking and minification. R8 uses the Proguard keep rule format for specifying the entry points for an application.
Typical invocations of R8 to produce optimized dex file(s) in the out directory:
$ java -jar build/libs/r8.jar --release --output out --pg-conf proguard.cfg input.jar
The full set of R8 options can be obtained by running the command line tool with the
Typical steps to run tests:
$ tools/test.py --no_internal
tools/test.py script will use depot_tools to download a lot of tests and test dependencies on the first run. This includes prebuilt version of the art runtime on which to validate the produced dex code.
Once the license agreement is in place, you can upload your patches using ‘git cl’ which is available in depot_tools. Once you have a change that you are happy with you should make sure that it passes all tests and then upload the change to our code review tool using:
$ git cl upload
On your first upload you will be asked to acquire credentials. Follow the instructions given by
git cl upload.
On successful uploads a link to the code review is printed in the output of the upload command. In the code review tool you can assign reviewers and mark the change ready for review. At that point the code review tool will send emails to reviewers.
For questions, reach out to us at firstname.lastname@example.org.