6.0.0-rc3

NEW FEATURES

When used with Bazel 7, Protobuf Toolchainization is now available. This allows you to choose where the protobuf compiler (protoc) comes from, as well as configure a toolchain for each language you generate proto stubs for.

This de-couples rules_proto from the https://github.com/protocolbuffers/protobuf repository; rules_proto no longer depends on com_google_protobuf. The Bazel rules in that repository are now maintained by the protobuf team for Google use cases, and may diverge from rules_proto over time.

rules_proto does not include the toolchain implementation. See https://registry.bazel.build/modules/toolchains_protoc for an example module that registers the prebuilt binary from https://github.com/protocolbuffers/protobuf/releases.

The tracking issue for this feature is #179

BREAKING CHANGES

Upgrading from rules_proto 5.x requires some changes:

• The load site for rules_proto_toolchains has changed. See the new WORKSPACE snippet below.
• As mentioned above, rules_proto no longer depends on the protobuf repo (commonly as com_google_protobuf). As a result, the rules_proto_dependencies macro no longer fetches one. For WORKSPACE users, this may affect what version of protobuf you end up with. We recommend explicitly fetching com_google_protobuf early in the WORKSPACE file, as the first declaration wins.

Using bzlmod with Bazel 6 or later:

1. [Bazel 6] Add common --enable_bzlmod to .bazelrc.

2. Add to your MODULE.bazel file:

bazel_dep(name = "rules_proto", version = "6.0.0-rc3")

Using WORKSPACE:

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
    name = "rules_proto",
    sha256 = "a88d018bdcb8df1ce8185470eb4b4899d778f9ac3a66cb36d514beb81e345282",
    strip_prefix = "rules_proto-6.0.0-rc3",
    url = "https://github.com/bazelbuild/rules_proto/releases/download/6.0.0-rc3/rules_proto-6.0.0-rc3.tar.gz",
)

load("@rules_proto//proto:repositories.bzl", "rules_proto_dependencies")
rules_proto_dependencies()

load("@rules_proto//proto:toolchains.bzl", "rules_proto_toolchains")
rules_proto_toolchains()

What's Changed

• fix: add bazel versions tested to presubmit by @thesayyn in #202

Full Changelog: 6.0.0-rc2...6.0.0-rc3