Add Bazel Central Registry (BCR) publishing support

.bazelignore

@@ -0,0 +1 @@
+e2e/bcr

.bazelrc

@@ -1,5 +1,6 @@
 build:linux --cxxopt=-std=c++17 --host_cxxopt=-std=c++17
 build:macos --cxxopt=-std=c++17 --host_cxxopt=-std=c++17
+build:windows --cxxopt=/std:c++17 --host_cxxopt=/std:c++17
 
 build:dbg --compilation_mode=dbg
 
@@ -29,12 +30,12 @@ build:ubsan --copt=-fno-sanitize=function --copt=-fno-sanitize=vptr
 build --features=layering_check
 common --enable_platform_specific_config
 
-build:windows --cxxopt=/std:c++17
-build:windows --host_cxxopt=/std:c++17
-
 common --repo_env=BAZEL_NO_APPLE_CPP_TOOLCHAIN=1
 
 
 # Allow building with MSVC, which is being deprecated.
 # See: https://github.com/protocolbuffers/protobuf/issues/20085
 build --define=protobuf_allow_msvc=true
+
+# To facilitate testing in bazelci incompatible flags
+build --incompatible_autoload_externally=

.bcr/metadata.template.json

@@ -0,0 +1,15 @@
+{
+    "homepage": "https://github.com/protocolbuffers/protobuf-javascript",
+    "maintainers": [
+        {
+            "name": "Stephanie DiBenedetto",
+            "email": "dibenede@google.com",
+            "github": "dibenede"
+        }
+    ],
+    "repository": [
+        "github:protocolbuffers/protobuf-javascript"
+    ],
+    "versions": [],
+    "yanked_versions": {}
+}

.bcr/patches/remove-dist.patch

@@ -0,0 +1,88 @@
+diff --git a/BUILD.bazel b/BUILD.bazel
+index b64b057..a7d6524 100644
+--- a/BUILD.bazel
++++ b/BUILD.bazel
+@@ -2,10 +2,6 @@
+ #
+ # See also code generation logic under generator/
+
+-load("@rules_pkg//:mappings.bzl", "pkg_attributes", "pkg_files", "strip_prefix")
+-load("@rules_pkg//:pkg.bzl", "pkg_tar", "pkg_zip")
+-load("//:protobuf_javascript_release.bzl", "package_naming")
+-
+ exports_files(["package.json"])
+
+ config_setting(
+@@ -33,72 +29,6 @@ config_setting(
+     values = {"cpu": "darwin_x86_64"},
+ )
+
+-package_naming(
+-    name = "protobuf_javascript_pkg_naming",
+-    platform = select({
+-        ":k8": "linux-x86_64",  # currently the only supported build type in Github Actions
+-        ":x64_x86_windows": "win32",
+-        ":x64_windows": "win64",
+-        ":darwin_arm64": "osx-aarch_64",
+-        ":darwin_x86_64": "osx-x86_64",
+-        "//conditions:default": "",  # continues with current behavior when no --cpu is specified allowing existing internal builds to function
+-    }),
+-)
+-
+-pkg_files(
+-    name = "plugin_files",
+-    srcs = ["//generator:protoc-gen-js"],
+-    attributes = pkg_attributes(mode = "0555"),
+-    prefix = "bin/",
+-)
+-
+-pkg_files(
+-    name = "dist_files",
+-    srcs = glob(
+-        [
+-            "google/protobuf/*.js",
+-            "google/protobuf/compiler/*.js",
+-        ],
+-        allow_empty = True,
+-    ) + [
+-        "LICENSE.md",
+-        "LICENSE-asserts.md",
+-        "README.md",
+-        "google-protobuf.js",
+-        "package.json",
+-    ],
+-    strip_prefix = strip_prefix.from_root(""),
+-)
+-
+-pkg_tar(
+-    name = "dist_tar",
+-    srcs = [
+-        ":dist_files",
+-        ":plugin_files",
+-    ],
+-    extension = "tar.gz",
+-    package_file_name = "protobuf-javascript-{version}-{platform}.tar.gz",
+-    package_variables = ":protobuf_javascript_pkg_naming",
+-)
+-
+-pkg_zip(
+-    name = "dist_zip",
+-    srcs = [
+-        ":dist_files",
+-        ":plugin_files",
+-    ],
+-    package_file_name = "protobuf-javascript-{version}-{platform}.zip",
+-    package_variables = ":protobuf_javascript_pkg_naming",
+-)
+-
+-filegroup(
+-    name = "dist_all",
+-    srcs = [
+-        ":dist_tar",
+-        ":dist_zip",
+-    ],
+-)
+-
+ filegroup(
+     name = "javascript",
+     srcs = [

.bcr/presubmit.yml

@@ -0,0 +1,12 @@
+bcr_test_module:
+  module_path: "e2e/bcr"
+  matrix:
+    platform: ["debian11", "ubuntu2404", "macos"]
+    bazel: [7.x, 8.x]
+  tasks:
+    run_tests:
+      name: "Run test module"
+      platform: ${{ platform }}
+      bazel: ${{ bazel }}
+      test_targets:
+        - "//..."

.bcr/source.template.json

@@ -0,0 +1,5 @@
+{
+    "integrity": "",
+    "strip_prefix": "{REPO}-{TAG}",
+    "url": "https://github.com/{OWNER}/{REPO}/releases/download/{TAG}/{REPO}-{TAG}.tar.gz"
+}

.github/workflows/publish.yaml

@@ -0,0 +1,36 @@
+# Publish new releases to Bazel Central Registry.
+name: Publish to BCR
+on:
+    # Run the publish workflow after a successful release
+    # Will be triggered from the release.yaml workflow
+    workflow_call:
+        inputs:
+            tag_name:
+                required: true
+                type: string
+        secrets:
+            publish_token:
+                required: true
+    # In case of problems, let release engineers retry by manually dispatching
+    # the workflow from the GitHub UI
+    workflow_dispatch:
+        inputs:
+            tag_name:
+                description: git tag being released
+                required: true
+                type: string
+jobs:
+    publish:
+        uses: bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml@v0.2.3
+        with:
+            draft: false
+            tag_name: ${{ inputs.tag_name }}
+            # GitHub repository which is a fork of the upstream where the Pull Request will be opened.
+            registry_fork: protocolbuffers/bazel-central-registry
+        permissions:
+            attestations: write
+            contents: write
+            id-token: write
+        secrets:
+            # Necessary to push to the BCR fork, and to open a pull request against a registry
+            publish_token: ${{ secrets.publish_token || secrets.BCR_PUBLISH_TOKEN }}

.github/workflows/release.yaml

@@ -0,0 +1,35 @@
+# Cut a release whenever a new tag is pushed to the repo.
+name: Release
+on:
+    # Can be triggered from the tag.yaml workflow
+    workflow_call:
+        inputs:
+            tag_name:
+                required: true
+                type: string
+        secrets:
+            publish_token:
+                required: true
+    # Or, developers can manually push a tag from their clone
+    push:
+        tags:
+            - "v*.*.*"
+permissions:
+    id-token: write
+    attestations: write
+    contents: write
+jobs:
+    release:
+        uses: bazel-contrib/.github/.github/workflows/release_ruleset.yaml@v7.2.3
+        with:
+            prerelease: false
+            release_files: protobuf-javascript-*.tar.gz
+            tag_name: ${{ inputs.tag_name || github.ref_name }}
+        secrets: inherit
+    publish:
+        needs: release
+        uses: ./.github/workflows/publish.yaml
+        with:
+            tag_name: ${{ inputs.tag_name || github.ref_name }}
+        secrets:
+            publish_token: ${{ secrets.publish_token || secrets.BCR_PUBLISH_TOKEN }}

.github/workflows/release_prep.sh

@@ -0,0 +1,28 @@
+
+#!/usr/bin/env bash
+
+set -o errexit -o nounset -o pipefail
+
+# Set by GH actions, see
+# https://docs.github.com/en/actions/learn-github-actions/environment-variables#default-environment-variables
+readonly TAG=$1
+# The prefix is chosen to match what GitHub generates for source archives.
+# This guarantees that users can easily switch from a released artifact to a source archive
+# with minimal differences in their code (e.g. strip_prefix remains the same)
+readonly PREFIX="protobuf_javascript-${TAG}"
+readonly ARCHIVE="${PREFIX}.tar.gz"
+
+# NB: configuration for 'git archive' is in /.gitattributes
+git archive --format=tar --prefix=${PREFIX}/ ${TAG} | gzip > $ARCHIVE
+SHA=$(shasum -a 256 $ARCHIVE | awk '{print $1}')
+
+# The stdout of this program will be used as the top of the release notes for this release.
+cat << EOF
+## Using bzlmod with Bazel 7 or later:
+
+Add to your \`MODULE.bazel\` file:
+
+\`\`\`starlark
+bazel_dep(name = "protobuf_javascript", version = "${TAG}")
+\`\`\`
+EOF

BUILD.bazel

@@ -98,3 +98,41 @@ filegroup(
         ":dist_zip",
     ],
 )
+
+filegroup(
+    name = "javascript",
+    srcs = [
+        "asserts.js",
+        "binary/any_field_type.js",
+        "binary/arith.js",
+        "binary/binary_constants.js",
+        "binary/bytesource.js",
+        "binary/bytesource_alias.js",
+        "binary/decoder.js",
+        "binary/decoder_alias.js",
+        "binary/encoder.js",
+        "binary/encoder_alias.js",
+        "binary/errors.js",
+        "binary/internal_buffer.js",
+        "binary/reader.js",
+        "binary/reader_alias.js",
+        "binary/repeated_field_type.js",
+        "binary/scalar_field_type.js",
+        "binary/test_utils.js",
+        "binary/utf8.js",
+        "binary/utils.js",
+        "binary/writer.js",
+        "binary/writer_alias.js",
+        "bytestring.js",
+        "debug.js",
+        "extension_field_binary_info.js",
+        "extension_field_info.js",
+        "internal_bytes.js",
+        "internal_options.js",
+        "internal_public.js",
+        "map.js",
+        "message.js",
+        "unsafe_bytestring.js",
+    ],
+    visibility = ["//visibility:public"],
+)

MODULE.bazel

@@ -1,6 +1,8 @@
-module(name = "protobuf_javascript", version = "4.0.1")
+"Bazel module that provides protoc-gen-js."
+
+module(name = "protobuf_javascript", version = "0.0.0")  # updated by release action
 
 bazel_dep(name = "abseil-cpp", version = "20250512.1")
 bazel_dep(name = "protobuf", version = "33.0", repo_name = "com_google_protobuf")
 bazel_dep(name = "rules_cc", version = "0.2.15")
-bazel_dep(name = "rules_pkg", version = "1.0.1")
+bazel_dep(name = "rules_pkg", version = "1.0.1", dev_dependency = True)