name: rusty-v8-release

on:
  workflow_dispatch:
    inputs:
      release_tag:
        description: Optional release tag. Defaults to rusty-v8-v<resolved_v8_version>.
        required: false
        type: string
      publish:
        description: Publish the staged musl artifacts to a GitHub release.
        required: false
        default: true
        type: boolean

concurrency:
  group: ${{ github.workflow }}::${{ inputs.release_tag || github.run_id }}
  cancel-in-progress: false

jobs:
  metadata:
    runs-on: ubuntu-latest
    outputs:
      release_tag: ${{ steps.release_tag.outputs.release_tag }}
      v8_version: ${{ steps.v8_version.outputs.version }}

    steps:
      - uses: actions/checkout@v6

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: "3.12"

      - name: Resolve exact v8 crate version
        id: v8_version
        shell: bash
        run: |
          set -euo pipefail
          version="$(python3 .github/scripts/rusty_v8_bazel.py resolved-v8-crate-version)"
          echo "version=${version}" >> "$GITHUB_OUTPUT"

      - name: Resolve release tag
        id: release_tag
        env:
          RELEASE_TAG_INPUT: ${{ inputs.release_tag }}
          V8_VERSION: ${{ steps.v8_version.outputs.version }}
        shell: bash
        run: |
          set -euo pipefail

          release_tag="${RELEASE_TAG_INPUT}"
          if [[ -z "${release_tag}" ]]; then
            release_tag="rusty-v8-v${V8_VERSION}"
          fi

          echo "release_tag=${release_tag}" >> "$GITHUB_OUTPUT"

  build:
    name: Build ${{ matrix.target }}
    needs: metadata
    runs-on: ${{ matrix.runner }}
    permissions:
      contents: read
      actions: read
    strategy:
      fail-fast: false
      matrix:
        include:
          - runner: ubuntu-24.04
            platform: linux_amd64_musl
            target: x86_64-unknown-linux-musl
          - runner: ubuntu-24.04-arm
            platform: linux_arm64_musl
            target: aarch64-unknown-linux-musl

    steps:
      - uses: actions/checkout@v6

      - name: Set up Bazel
        uses: bazelbuild/setup-bazelisk@v3

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: "3.12"

      - name: Build Bazel V8 release pair
        env:
          BUILDBUDDY_API_KEY: ${{ secrets.BUILDBUDDY_API_KEY }}
          PLATFORM: ${{ matrix.platform }}
          TARGET: ${{ matrix.target }}
        shell: bash
        run: |
          set -euo pipefail

          target_suffix="${TARGET//-/_}"
          pair_target="//third_party/v8:rusty_v8_release_pair_${target_suffix}"
          extra_targets=()
          if [[ "${TARGET}" == *-unknown-linux-musl ]]; then
            extra_targets=(
              "@llvm//runtimes/libcxx:libcxx.static"
              "@llvm//runtimes/libcxx:libcxxabi.static"
            )
          fi

          bazel_args=(
            build
            -c
            opt
            "--platforms=@llvm//platforms:${PLATFORM}"
            "${pair_target}"
            "${extra_targets[@]}"
            --build_metadata=COMMIT_SHA=$(git rev-parse HEAD)
          )

          bazel \
            --noexperimental_remote_repo_contents_cache \
            --bazelrc=.github/workflows/v8-ci.bazelrc \
            "${bazel_args[@]}" \
            "--remote_header=x-buildbuddy-api-key=${BUILDBUDDY_API_KEY}"

      - name: Stage release pair
        env:
          PLATFORM: ${{ matrix.platform }}
          TARGET: ${{ matrix.target }}
        shell: bash
        run: |
          set -euo pipefail

          python3 .github/scripts/rusty_v8_bazel.py stage-release-pair \
            --platform "${PLATFORM}" \
            --target "${TARGET}" \
            --compilation-mode opt \
            --output-dir "dist/${TARGET}"

      - name: Upload staged musl artifacts
        uses: actions/upload-artifact@v7
        with:
          name: rusty-v8-${{ needs.metadata.outputs.v8_version }}-${{ matrix.target }}
          path: dist/${{ matrix.target }}/*

  publish-release:
    if: ${{ inputs.publish }}
    needs:
      - metadata
      - build
    runs-on: ubuntu-latest
    permissions:
      contents: write
      actions: read

    steps:
      - name: Ensure publishing from default branch
        if: ${{ github.ref_name != github.event.repository.default_branch }}
        env:
          DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
        shell: bash
        run: |
          set -euo pipefail
          echo "Publishing is only allowed from ${DEFAULT_BRANCH}; current ref is ${GITHUB_REF_NAME}." >&2
          exit 1

      - name: Ensure release tag is new
        env:
          GH_TOKEN: ${{ github.token }}
          RELEASE_TAG: ${{ needs.metadata.outputs.release_tag }}
        shell: bash
        run: |
          set -euo pipefail

          if gh release view "${RELEASE_TAG}" --repo "${GITHUB_REPOSITORY}" > /dev/null 2>&1; then
            echo "Release tag ${RELEASE_TAG} already exists; musl artifact tags are immutable." >&2
            exit 1
          fi

      - uses: actions/download-artifact@v8
        with:
          path: dist

      - name: Create GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ needs.metadata.outputs.release_tag }}
          name: ${{ needs.metadata.outputs.release_tag }}
          files: dist/**
          # Keep V8 artifact releases out of Codex's normal "latest release" channel.
          prerelease: true