| commit | 1d37738b84cf0c6ad30d3d746ae8426b5a506cc8 | [log] [tgz] |
|---|---|---|
| author | Christoffer Quist Adamsen <christofferqa@google.com> | Sat Feb 05 11:56:53 2022 +0100 |
| committer | Christoffer Adamsen <christofferqa@google.com> | Sat Feb 05 10:57:16 2022 +0000 |
| tree | 4fa0fdc8d614c462fd1413cb8a5c177d023b56f4 | |
| parent | 68afbc60e854be93182435d71cd56d1710bff0d3 [diff] |
Revert "Reland "Enabling machine desugared library specification"" This reverts commit 0a497e239595a917d0630f683001bc542a787d81. Revert "Use machine desugared library flags" This reverts commit 753ea6073fc6d8d6a0979cbb0a6331425237ca8d. Revert "Machine flags for interface method desugaring" This reverts commit f1354dadcd044c16344359d9b43266629cc5ad2d. Revert "Use machine desugared library conf when possible" This reverts commit 7ee13eb7141cb3231fb49f097c0a527f5cb45396. Revert "Use more machine desugared library flags" This reverts commit 8b6f2291df515a94427acd4dd422756d8bf0f522. Revert "Stub retargeter" This reverts commit e83d09622b71ae8183106c925c997a364ed71c4d. Revert "Fix cast" This reverts commit d6732348f6370ca84e2f859df087f1b083d0792f. Revert "Revert "Stub retargeter"" This reverts commit 4cb874265aec9256c3f9cb4b301df4e87b14f5bf. Revert "Fix JDK11 desugared library build" This reverts commit 9abafda3f4d28815d2e71f3f93d24be8c390b335. Reason for revert: Blocking google3 roll Change-Id: I4cfd412cfbce77aa810b77b2ac596c8ab250528e
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
The 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: build/libs/d8.jar and build/libs/r8.jar.
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 --help option.
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 --help option.
Typical steps to run tests:
$ tools/test.py --no_internal
The 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.
In order to contribute to D8/R8 you have to sign the Contributor License Agreement. If your contribution is owned by your employer you need the Corporate Contributor License Agreement.
Once the license agreement is in place, please send an email to r8-dev@googlegroups.com to be added as a contributor.
After being added as a contributer 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 r8-dev@googlegroups.com.
For D8, find known issues in the D8 issue tracker or file a new D8 bug report.
For R8, find known issues in the R8 issue tracker or file a new R8 bug report.