Add BCR boilerplate

Author: pcj

.bcr/metadata.template.json

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+{
+    "homepage": "https://github.com/protocolbuffers/protobuf-javascript",
+    "maintainers": [
+        {
+            "name": "Stephanie DiBenedetto",
+            "email": "[email protected]",
+            "github": "dibenede"
+        },
+        {
+            "name": "Paul Cody",
+            "email": "[email protected]",
+            "github": "pcj"
+        }
+    ],
+    "repository": [
+        "github:protocolbuffers/protobuf-javascript"
+    ],
+    "versions": [],
+    "yanked_versions": {}
+}

.bcr/presubmit.yml

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+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

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

.github/workflows/publish.yaml

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+# 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/[email protected]
+        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

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+# 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/[email protected]
+        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

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+
+#!/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

MODULE.bazel.lock

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+build --cxxopt=-std=c++17 --host_cxxopt=-std=c++17

e2e/bcr/.bazelrc

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+load("@protobuf//bazel:proto_library.bzl", "proto_library")
+load("@rules_shell//shell:sh_test.bzl", "sh_test")
+
+proto_library(
+    name = "simple_proto",
+    srcs = ["simple.proto"],
+)
+
+genrule(
+    name = "simple_js",
+    srcs = [":simple_proto"],
+    outs = ["simple.js"],
+    cmd = """
+$(location @protobuf//:protoc) \
+  --descriptor_set_in=$(location :simple_proto) \
+  --plugin=protoc-gen-js=$(location @protobuf_javascript//generator:protoc-gen-js) \
+  --js_out=$(RULEDIR) \
+  simple.proto
+""",
+    tools = [
+        "@protobuf//:protoc",
+        "@protobuf_javascript//generator:protoc-gen-js",
+    ],
+)
+
+sh_test(
+    name = "simple_js_test",
+    srcs = ["simple_js_test.sh"],
+    data = [":simple.js"],
+)

e2e/bcr/BUILD.bazel

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+"MODULE.bazel file for bcr smoke test"
+
+bazel_dep(name = "rules_shell", version = "0.6.1")
+bazel_dep(name = "protobuf", version = "33.0")
+bazel_dep(name = "protobuf_javascript", version = "0.0.0", dev_dependency = True)
+local_path_override(module_name = "protobuf_javascript", path = "../..")