Bazel: Don't build protobuf from the source

Gerrit is pure java project. Given that it depends on Google protobuf,
and given that Bazel was using @com_google_protobuf toolchain that was
built from source, this project ended up bulding the Google protobuf
from source.

Compiling protoc from source requires a functional C++ toolchain,
which is a burden for projects that have no C++ code. Also, Bazel
does not ship with a hermetic toolchain, so that it is possible
that for many Gerrit developers and contributors the Bazel build
is inherently broken.

In addition, building protobuf from source made OS upgrades difficult
because of the incompatibilities between the source code and the latest XCode versions.

That changed in Bazel 7.x release, with the new and shiny option:
--incompatible_enable_proto_toolchain_resolution, that allow to register
prebuilt protoc toolchains.

In addition rules_proto have added support for prebuilt toolchains in
context of this tracking issue: [1].

In this change we use toolchains_protoc project to consume predefined
protobuf toolchains: [2].

As the side effect of this change we have to consume protobuf-java
ourself and not transitively through standard @com_google_protobuf
toolchain. Given that Google protobuf is internal Google project and
all released versions already available within Google, we add the new
dependency to tools/nongoogle.bzl to exempt the updates for it from the
Library-Compliance label.

Now, that we stop building protobuf from source, we can remove C++
options in .bazelrc as well.

[1] https://github.com/bazelbuild/rules_proto/issues/179
[2] https://github.com/aspect-build/toolchains_protoc

Release-Notes: Use prebuilt protobuf toolchain to avoid building protoc from source
Change-Id: I27975879819c4b632682990474ce88737f722d9a
6 files changed
tree: 8cbec2774c5e8ddfe85db8e8b714c4e489450b61
  1. .github/
  2. .settings/
  3. .ts-out/
  4. antlr3/
  5. contrib/
  6. Documentation/
  7. e2e-tests/
  8. java/
  9. javatests/
  10. lib/
  11. modules/
  12. plugins/
  13. polygerrit-ui/
  14. prolog/
  15. prologtests/
  16. proto/
  17. resources/
  18. tools/
  19. webapp/
  20. .bazelignore
  21. .bazelproject
  22. .bazelrc
  23. .bazelversion
  24. .editorconfig
  25. .git-blame-ignore-revs
  26. .gitignore
  27. .gitmodules
  28. .gitreview
  29. .pydevproject
  30. .zuul.yaml
  31. BUILD
  32. COPYING
  33. INSTALL
  34. Jenkinsfile
  35. MODULE.bazel
  36. package.json
  37. README.md
  38. SUBMITTING_PATCHES
  39. version.bzl
  40. web-dev-server.config.mjs
  41. WORKSPACE
  42. yarn.lock
README.md

Gerrit Code Review

Gerrit is a code review and project management tool for Git based projects.

Build Status Maven Central

Objective

Gerrit makes reviews easier by showing changes in a side-by-side display, and allowing inline comments to be added by any reviewer.

Gerrit simplifies Git based project maintainership by permitting any authorized user to submit changes to the master Git repository, rather than requiring all approved changes to be merged in by hand by the project maintainer.

Documentation

For information about how to install and use Gerrit, refer to the documentation.

Source

Our canonical Git repository is located on googlesource.com. There is a mirror of the repository on Github.

Reporting bugs

Please report bugs on the issue tracker.

Contribute

Gerrit is the work of hundreds of contributors. We appreciate your help!

Please read the contribution guidelines.

Note that we do not accept Pull Requests via the Github mirror.

Getting in contact

The Developer Mailing list is repo-discuss on Google Groups.

License

Gerrit is provided under the Apache License 2.0.

Build

Install Bazel and run the following:

    git clone --recurse-submodules https://gerrit.googlesource.com/gerrit
    cd gerrit && bazel build release

Install binary packages (Deb/Rpm)

The instruction how to configure GerritForge/BinTray repositories is here

On Debian/Ubuntu run:

    apt-get update && apt-get install gerrit=<version>-<release>

NOTE: release is a counter that starts with 1 and indicates the number of packages that have been released with the same version of the software.

On CentOS/RedHat run:

    yum clean all && yum install gerrit-<version>[-<release>]

On Fedora run:

    dnf clean all && dnf install gerrit-<version>[-<release>]

Use pre-built Gerrit images on Docker

Docker images of Gerrit are available on DockerHub

To run a CentOS 8 based Gerrit image:

    docker run -p 8080:8080 gerritcodereview/gerrit[:version]-centos8

To run a Ubuntu 20.04 based Gerrit image:

    docker run -p 8080:8080 gerritcodereview/gerrit[:version]-ubuntu20

NOTE: release is optional. Last released package of the version is installed if the release number is omitted.