release.yml

name: Build & Release

on:
  push:
    branches:
    - main

jobs:
  version:
    outputs:
      version: ${{ steps.echo.outputs.version }}
    # version job uses ubuntu 24.04, this way we don't have to install the updated clang while
    # the build job uses 20.04 for libc compatibility.
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v4
      - id: echo
        run: |
          echo "::set-output name=version::1.$(cat src/workerd/io/supported-compatibility-date.txt | tr -d '-').0"
  check-tag:
    name: Check tag is new
    outputs:
      exists: ${{ steps.check_tag.outputs.exists }}
    needs: [version]
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Repo
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - uses: mukunku/tag-exists-action@v1.6.0
        id: check_tag
        with:
          tag: v${{ needs.version.outputs.version }}

  tag-and-release:
    name: Tag & Release
    outputs:
      upload_url: ${{ steps.create_release.outputs.upload_url }}
    needs: [check-tag, version]
    runs-on: ubuntu-latest
    if: ${{ needs.check-tag.outputs.exists != 'true' }}
    steps:
      - name: Checkout Repo
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - run: git tag v${{ needs.version.outputs.version }} && git push origin v${{ needs.version.outputs.version }}
      - uses: ncipollo/release-action@v1
        id: create_release
        with:
          generateReleaseNotes: true
          token: ${{ secrets.GITHUB_TOKEN }}
          tag: v${{ needs.version.outputs.version }}

  build:
    strategy:
      matrix:
        os: [ubuntu-20.04, macos-15, windows-2022]
        target-arch: [ X64 ]
        include:
          - os-name: linux
            os: ubuntu-20.04
            bazel-config: release_linux
          # Based on runner availability, we build both Apple Silicon and (cross-compiled) x86
          # release binaries on the macos-15 runner.
          - os-name: macOS-x64
            # This configuration is used for cross-compiling – macos-15 is Apple Silicon-based but
            # we use it to compile the x64 release.
            os: macos-15
            bazel-config: release_macos_cross_x86_64
          - os-name: macOS-arm64
            os: macos-15
            bazel-config: release_macos
            target-arch: ARM64
          - os-name: windows
            os: windows-2022
            bazel-config: release_windows
    runs-on: ${{ matrix.os }}
    name: build (${{ matrix.os-name }})
    steps:
      - uses: actions/checkout@v4
        with:
          show-progress: false
      - name: Cache
        id: cache
        uses: actions/cache@v4
        with:
          path: ~/bazel-disk-cache
          # Use a different cache key than for tests here, otherwise the release cache could end up
          # being used for test builds, where it provides little benefit.
          key: bazel-disk-cache-release-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('.bazelversion', '.bazelrc', 'WORKSPACE') }}
      - name: Setup Linux
        if: runner.os == 'Linux'
        run: |
          export DEBIAN_FRONTEND=noninteractive
          wget https://apt.llvm.org/llvm.sh
          sed -i '/apt-get install/d' llvm.sh
          chmod +x llvm.sh
          sudo ./llvm.sh 16
          sudo apt-get install -y --no-install-recommends clang-16 lld-16 libunwind-16 libc++abi1-16 libc++1-16 libc++-16-dev
          echo "build:linux --action_env=CC=/usr/lib/llvm-16/bin/clang --action_env=CXX=/usr/lib/llvm-16/bin/clang++" >> .bazelrc
          echo "build:linux --host_action_env=CC=/usr/lib/llvm-16/bin/clang --host_action_env=CXX=/usr/lib/llvm-16/bin/clang++" >> .bazelrc
      - name: Setup macOS
        if: runner.os == 'macOS'
        run: |
          # Install lld and link it to /usr/local/bin. We overwrite any existing link, which may
          # exist from an older pre-installed LLVM version on the runner image.
          brew install lld
          sudo ln -s -f $(brew --prefix lld)/bin/ld64.lld /usr/local/bin/ld64.lld
          # Enable lld identical code folding to significantly reduce binary size.
          echo "build:macos --config=macos_lld_icf" >> .bazelrc
      - name: Setup Windows
        if: runner.os == 'Windows'
        run: |
          git config --global core.symlinks true
          git config --show-scope --show-origin core.symlinks
          # Set a custom output root directory to avoid long file name issues.
          [System.IO.File]::WriteAllLines((Join-Path -Path $env:USERPROFILE -ChildPath '.bazelrc'), 'startup --output_user_root=C:/tmp')
      - name: Configure download mirrors
        shell: bash
        run: |
          if [ ! -z "${{ secrets.WORKERS_MIRROR_URL }}" ] ; then
            # Strip comment in front of WORKERS_MIRROR_URL, then substitute secret to use it.
            sed -e '/WORKERS_MIRROR_URL/ { s@# *@@; s@WORKERS_MIRROR_URL@${{ secrets.WORKERS_MIRROR_URL }}@; }' -i.bak WORKSPACE
          fi
      - name: Bazel build
        # Strip debug info here – we don't generate debug info but some is pulled in from external
        # static libraries, for example the Rust STL. This is equivalent to the -Wl,-S linker
        # option, symbols will not be removed.
        run: |
          bazel build --disk_cache=~/bazel-disk-cache --strip=always --remote_cache=https://bazel:${{ secrets.BAZEL_CACHE_KEY }}@bazel-remote-cache.devprod.cloudflare.dev --config=ci --config=${{ matrix.bazel-config }} //src/workerd/server:workerd
      - name: Upload binary
        uses: actions/upload-artifact@v4
        with:
          name: ${{ runner.os }}-${{ matrix.target-arch }}-binary
          path: bazel-bin/src/workerd/server/workerd${{ runner.os == 'Windows' && '.exe' || '' }}

  upload-artifacts:
    name: Upload Artifacts
    needs: [tag-and-release, build]
    runs-on: ubuntu-latest
    strategy:
      matrix:
        arch: [linux-64, darwin-64, windows-64]
        # This variable itself is unused, but allows us to set up two macOS builds. arm64 builds for
        # other platforms will be supported later, then we'll list both architectures here.
        cpu: [ X64 ]
        include:
          - arch: linux-64
            name: Linux-X64
          - arch: darwin-64
            name: macOS-X64
          - arch: darwin-arm64
            name: macOS-ARM64
            cpu: ARM64
          - arch: windows-64
            name: Windows-X64
    steps:
      - name: Download ${{ matrix.name }}
        uses: actions/download-artifact@v4
        with:
          name: ${{ matrix.name }}-binary
          path: /tmp
      # Set execute permissions before compressing the binary
      - if: matrix.arch != 'windows-64'
        run: chmod +x /tmp/workerd
      - name: Compress release binary
        run: |
            # As of release v1.20230404.0 the Linux x64 binary after debug_strip is 65.8 MB,
            # 21.0 MB with gzip and 17.3 MB with brotli -9. Use gzip as a widely supported format
            # which still produces an acceptable compressed size.
            gzip -9N /tmp/workerd${{ matrix.arch == 'windows-64' && '.exe' || '' }}
      - run: mv /tmp/workerd${{ matrix.arch == 'windows-64' && '.exe' || '' }}.gz /tmp/workerd-${{ matrix.arch }}.gz
      # Upload compressed release binaries – one set of artifacts is sufficient with gzip being
      # widely supported
      - name: Upload Release Assets
        id: upload-release-asset
        uses: actions/upload-release-asset@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          upload_url: ${{ needs.tag-and-release.outputs.upload_url }}
          asset_path: /tmp/workerd-${{ matrix.arch }}.gz
          asset_name: workerd-${{ matrix.arch }}.gz
          asset_content_type: application/gzip

  miniflare-test:
    name: Run Miniflare tests
    needs: [build]
    runs-on: ubuntu-latest
    steps:
      - name: Checkout workers-sdk
        uses: actions/checkout@v4
        with:
          repository: cloudflare/workers-sdk

      - name: Install pnpm
        uses: pnpm/action-setup@v4
      - name: Use Node.js
        uses: actions/setup-node@v4
        with:
          node-version: lts/*
          cache: "pnpm"
      - name: Install workers-sdk dependencies
        run: pnpm install

      - name: Download workerd binary
        uses: actions/download-artifact@v4
        with:
          name: Linux-X64-binary
          path: /tmp
      - name: Make workerd binary executable
        run: chmod +x /tmp/workerd

      - name: Build Miniflare and dependencies
        run: pnpm turbo build --filter miniflare

      - name: Run Miniflare tests
        run: pnpm --filter miniflare test
        env:
          MINIFLARE_WORKERD_PATH: /tmp/workerd