feat: add support for automated BCR publication

Author: GuillaumeLagrange

.bcr/config.yml

@@ -0,0 +1,3 @@
+moduleRoots:
+  - "core"
+  - "google_benchmark"

.github/workflows/publish-to-bcr.yml

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+name: Publish to Bazel Central Registry
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:
+    inputs:
+      tag_name:
+        description: 'Release tag to publish (e.g., v1.4.0)'
+        required: true
+        type: string
+      test_mode:
+        description: 'Test mode: open PR to your fork instead of upstream BCR'
+        required: false
+        type: boolean
+        default: false
+
+jobs:
+  publish-to-bcr:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      id-token: write
+      attestations: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.release.tag_name || inputs.tag_name }}
+
+      - name: Publish modules to BCR
+        uses: bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml@v1
+        with:
+          tag_name: ${{ github.event.release.tag_name || inputs.tag_name }}
+          registry_fork: CodSpeedHQ/bazel-central-registry
+          # TODO: Change this back to bazel-central-registry when ready
+          registry: CodSpeedHQ/bazel-central-registry
+          attest: true
+        secrets:
+          publish_token: ${{ secrets.BCR_PUBLISH_TOKEN }}

core/.bcr/metadata.template.json

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+{
+  "homepage": "https://codspeed.io",
+  "maintainers": [
+    {
+      "name": "Arthur Pastel",
+      "github": "art049"
+    }
+  ],
+  "repository": [
+    "github:CodSpeedHQ/codspeed-cpp"
+  ],
+  "versions": [],
+  "yanked_versions": {}
+}

core/.bcr/presubmit.yml

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+bcr_test_module:
+  module_path: ""
+  matrix:
+    platform:
+      - debian10
+      - macos
+      - ubuntu2004
+      - windows
+    bazel:
+      - 7.x
+      - 8.x
+  tasks:
+    verify_instrumentation:
+      platform: ${{ platform }}
+      bazel: ${{ bazel }}
+      build_flags:
+        - "--//:codspeed_mode=instrumentation"
+      build_targets:
+        - "//:codspeed"
+        - "//:instrument_hooks"
+    verify_walltime:
+      platform: ${{ platform }}
+      bazel: ${{ bazel }}
+      build_flags:
+        - "--//:codspeed_mode=walltime"
+      build_targets:
+        - "//:codspeed"
+        - "//:instrument_hooks"
+    verify_off:
+      platform: ${{ platform }}
+      bazel: ${{ bazel }}
+      build_flags:
+        - "--//:codspeed_mode=off"
+      build_targets:
+        - "//:codspeed"
+        - "//:instrument_hooks"

core/.bcr/source.template.json

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

google_benchmark/.bcr/metadata.template.json

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+{
+  "homepage": "https://codspeed.io",
+  "maintainers": [
+    {
+      "name": "Arthur Pastel",
+      "github": "art049"
+    }
+  ],
+  "repository": [
+    "github:CodSpeedHQ/codspeed-cpp"
+  ],
+  "versions": [],
+  "yanked_versions": {}
+}

google_benchmark/.bcr/presubmit.yml

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+bcr_test_module:
+  module_path: ""
+  matrix:
+    platform:
+      - debian10
+      - macos
+      - ubuntu2004
+      - windows
+    bazel:
+      - 7.x
+      - 8.x
+  tasks:
+    verify_instrumentation:
+      platform: ${{ platform }}
+      bazel: ${{ bazel }}
+      build_flags:
+        - "--@codspeed_core//:codspeed_mode=instrumentation"
+      build_targets:
+        - "//:benchmark"
+        - "//:benchmark_main"
+    verify_walltime:
+      platform: ${{ platform }}
+      bazel: ${{ bazel }}
+      build_flags:
+        - "--@codspeed_core//:codspeed_mode=walltime"
+      build_targets:
+        - "//:benchmark"
+        - "//:benchmark_main"

google_benchmark/.bcr/source.template.json

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