name: Release

on:
  push:
    branches:
      - main
  workflow_dispatch:

concurrency: ${{ github.workflow }}-${{ github.ref }}

jobs:
  check-release:
    name: Check for new version
    # The private mirror carries this file too; only the public repo
    # publishes (the trusted publisher is pinned to it).
    if: github.repository == 'vercel-labs/scriptc'
    runs-on: ubuntu-latest
    timeout-minutes: 5
    permissions:
      contents: read
    outputs:
      should_release: ${{ steps.check.outputs.should_release }}
      version: ${{ steps.check.outputs.version }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "24"
          registry-url: "https://registry.npmjs.org"

      - name: Compare package.json version to npm
        id: check
        run: |
          LOCAL_VERSION=$(node -p "require('./packages/cli/package.json').version")
          echo "Local version: $LOCAL_VERSION"

          NPM_VERSION=$(npm view scriptc version 2>/dev/null || echo "0.0.0")
          echo "npm version: $NPM_VERSION"

          if [ "$LOCAL_VERSION" != "$NPM_VERSION" ]; then
            echo "Version changed: $NPM_VERSION -> $LOCAL_VERSION"
            echo "should_release=true" >> "$GITHUB_OUTPUT"
          else
            echo "Version unchanged on npm, skipping publish"
            echo "should_release=false" >> "$GITHUB_OUTPUT"
          fi
          echo "version=$LOCAL_VERSION" >> "$GITHUB_OUTPUT"

  build-native-packages:
    name: Build native package (${{ matrix.platform }})
    needs: check-release
    if: needs.check-release.outputs.should_release == 'true'
    strategy:
      fail-fast: false
      matrix:
        include:
          - platform: darwin-arm64
            runner: macos-15
            helper: llvm-darwin-arm64
            runtime: runtime-darwin-arm64
          - platform: darwin-x64
            runner: macos-15-intel
            helper: llvm-darwin-x64
            runtime: runtime-darwin-x64
          - platform: linux-x64
            runner: ubuntu-24.04
            helper: llvm-linux-x64-gnu
            runtime: runtime-linux-x64-gnu
            llvm_asset: LLVM-22.1.8-Linux-X64
            use_zig: true
          - platform: linux-arm64
            runner: ubuntu-24.04-arm
            helper: llvm-linux-arm64-gnu
            runtime: runtime-linux-arm64-gnu
            llvm_asset: LLVM-22.1.8-Linux-ARM64
            use_zig: true
          - platform: windows-x64
            runner: windows-2022
            helper: llvm-win32-x64-msvc
            runtime: runtime-win32-x64-msvc
            use_zig: true
          - platform: linux-x64-musl
            runner: ubuntu-24.04
            helper: llvm-linux-x64-musl
            runtime: runtime-linux-x64-musl
            llvm_asset: LLVM-22.1.8-Linux-X64
            use_zig: true
          - platform: linux-arm64-musl
            runner: ubuntu-24.04-arm
            helper: llvm-linux-arm64-musl
            runtime: runtime-linux-arm64-musl
            llvm_asset: LLVM-22.1.8-Linux-ARM64
            use_zig: true
          - platform: wasm32-wasi
            runner: ubuntu-24.04
            helper: llvm-linux-x64-gnu
            runtime: runtime-wasm32-wasi
            llvm_asset: LLVM-22.1.8-Linux-X64
            use_zig: true
    runs-on: ${{ matrix.runner }}
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v4
        with:
          version: 11.1.3
      - uses: actions/setup-node@v4
        with:
          node-version: "24"
          cache: pnpm
      - name: Install toolchain (macOS)
        if: startsWith(matrix.platform, 'darwin')
        run: |
          brew install llvm@22
          llvm_prefix=$(brew --prefix llvm@22)
          echo "$llvm_prefix/bin" >> "$GITHUB_PATH"
          echo "LLVM_DIR=$llvm_prefix/lib/cmake/llvm" >> "$GITHUB_ENV"
      - name: Install pinned LLVM development distribution (Linux)
        if: startsWith(matrix.platform, 'linux') || matrix.platform == 'wasm32-wasi'
        run: |
          sudo apt-get update
          sudo apt-get install --yes g++ zlib1g-dev libzstd-dev
          curl -fL --retry 3 -o "$RUNNER_TEMP/llvm.tar.xz" "https://github.com/llvm/llvm-project/releases/download/llvmorg-22.1.8/${{ matrix.llvm_asset }}.tar.xz"
          tar -xJf "$RUNNER_TEMP/llvm.tar.xz" -C "$RUNNER_TEMP"
          mv "$RUNNER_TEMP/${{ matrix.llvm_asset }}" "$RUNNER_TEMP/llvm-22.1.8"
          echo "LLVM_DIR=$RUNNER_TEMP/llvm-22.1.8/lib/cmake/llvm" >> "$GITHUB_ENV"
          echo "$RUNNER_TEMP/llvm-22.1.8/bin" >> "$GITHUB_PATH"
      - uses: vercel-labs/setup-zig@v1
        if: matrix.use_zig == true
        with:
          version: 0.16.0
      - name: Install pinned LLVM development distribution (Windows)
        if: matrix.platform == 'windows-x64'
        shell: pwsh
        run: |
          # The complete archive supplies LLVM's exported CMake targets and
          # static libraries. windows-2022 includes CMake, Ninja, VS 2022,
          # and 7-Zip; unlike tar.exe, 7-Zip expands this archive quickly.
          $archive = "$env:RUNNER_TEMP\clang+llvm-22.1.8-x86_64-pc-windows-msvc.tar.xz"
          $llvm = "$env:RUNNER_TEMP\llvm-22.1.8"
          $expanded = "$env:RUNNER_TEMP\llvm-expanded"
          $sevenZip = "$env:ProgramFiles\7-Zip\7z.exe"
          if (-not (Test-Path $sevenZip)) {
            choco install 7zip --no-progress -y
            if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
          }
          if (-not (Test-Path $sevenZip)) { throw "7-Zip is unavailable" }
          curl.exe -fL --retry 3 -o $archive https://github.com/llvm/llvm-project/releases/download/llvmorg-22.1.8/clang%2Bllvm-22.1.8-x86_64-pc-windows-msvc.tar.xz
          & $sevenZip x -y "-o$expanded" $archive
          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
          & $sevenZip x -y "-o$expanded" "$expanded\clang+llvm-22.1.8-x86_64-pc-windows-msvc.tar"
          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
          Move-Item "$expanded\clang+llvm-22.1.8-x86_64-pc-windows-msvc" $llvm
          echo "LLVM_DIR=$llvm\lib\cmake\llvm" >> $env:GITHUB_ENV
          echo "$llvm\bin" >> $env:GITHUB_PATH
      - run: pnpm install --frozen-lockfile
      - name: Build native packages (POSIX)
        if: matrix.platform != 'windows-x64'
        run: |
          pnpm --filter @scriptc/${{ matrix.helper }} build:native
          if [ "${{ matrix.use_zig }}" = true ]; then
            CC=zig AR=zig pnpm --filter @scriptc/${{ matrix.runtime }} build:native
          else
            CC=clang AR=llvm-ar pnpm --filter @scriptc/${{ matrix.runtime }} build:native
          fi
      - name: Build native packages (Windows)
        if: matrix.platform == 'windows-x64'
        run: |
          pnpm --filter @scriptc/${{ matrix.helper }} build:native
          pnpm --filter @scriptc/${{ matrix.runtime }} build:native
      - uses: actions/upload-artifact@v4
        with:
          name: native-${{ matrix.platform }}
          path: |
            packages/${{ matrix.helper }}
            packages/${{ matrix.runtime }}
          retention-days: 1

  publish:
    name: Publish to npm
    needs: [check-release, build-native-packages]
    if: needs.check-release.outputs.should_release == 'true'
    runs-on: macos-15
    timeout-minutes: 15
    environment: Release
    permissions:
      contents: read
      id-token: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Download native packages
        uses: actions/download-artifact@v4
        with:
          pattern: native-*
          path: native-artifacts
          merge-multiple: true

      - name: Setup pnpm
        uses: pnpm/action-setup@v4
        with:
          version: 11.1.3

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "24"
          registry-url: "https://registry.npmjs.org"

      # Publishing uses npm trusted publishing (OIDC): the job's id-token
      # permission lets npm mint short-lived credentials, so no npm token
      # secret exists anywhere in this repo. The runtime, every shipped
      # platform runtime/helper package, compiler, and CLI must each be
      # configured on npmjs.com with a GitHub Actions trusted publisher
      # pointing at repository vercel-labs/scriptc, workflow release.yml,
      # environment Release. A package missing that configuration fails
      # with an OIDC authentication error before anything uploads.
      # Trusted publishing requires npm >= 11.5.1 (bundled with Node 24).

      - name: Install and build
        run: |
          pnpm install --frozen-lockfile
          cp -R native-artifacts/. packages/
          # upload-artifact does not preserve executable bits. Restore the
          # helper mode before pnpm runs its prepack checks.
          find packages -type f -path '*/bin/scriptc-llvm-codegen' -exec chmod 755 {} +
          pnpm -r build

      - name: Check version sync
        run: |
          VERSION="${{ needs.check-release.outputs.version }}"
          for pkg in packages/runtime packages/runtime-darwin-arm64 packages/llvm-darwin-arm64 packages/runtime-linux-x64-gnu packages/llvm-linux-x64-gnu packages/runtime-linux-arm64-gnu packages/llvm-linux-arm64-gnu packages/runtime-linux-x64-musl packages/llvm-linux-x64-musl packages/runtime-linux-arm64-musl packages/llvm-linux-arm64-musl packages/runtime-wasm32-wasi packages/runtime-win32-x64-msvc packages/llvm-win32-x64-msvc packages/compiler packages/cli; do
            V=$(node -p "require('./$pkg/package.json').version")
            if [ "$V" != "$VERSION" ]; then
              echo "Version mismatch: $pkg is $V, expected $VERSION"
              echo "Run 'node scripts/sync-versions.mjs' to stamp runtime and compiler from the CLI version, then commit"
              exit 1
            fi
          done

      - name: Package and verify LLVM helper
        run: |
          TARBALL=$(pnpm --dir packages/llvm-darwin-arm64 pack --pack-destination "$RUNNER_TEMP" --silent)
          HELPER_TARBALL="$RUNNER_TEMP/$(basename "$TARBALL")"
          node scripts/verify-llvm-package.mjs "$HELPER_TARBALL"
          echo "HELPER_TARBALL=$HELPER_TARBALL" >> "$GITHUB_ENV"

      - name: Publish to npm
        run: |
          VERSION="${{ needs.check-release.outputs.version }}"

          # npm accepts --provenance only from PUBLIC source repositories;
          # while this repo is internal the flag is dropped, and the same
          # step starts attaching provenance the moment the repo goes
          # public — no workflow edit.
          VISIBILITY=$(gh api "repos/${{ github.repository }}" --jq .visibility)
          if [ "$VISIBILITY" = "public" ]; then
            PROVENANCE="--provenance"
          else
            PROVENANCE=""
            echo "repository visibility is '$VISIBILITY': publishing without provenance"
          fi

          # Dependency order, so each package's deps are resolvable the
          # moment it lands. pnpm pack rewrites workspace:* to the real
          # version; npm publish on the tarball handles OIDC.
          # Re-runs skip anything already on the registry at this version.
          # npm may finish a trusted publication asynchronously. In that
          # window a retry can report "previously staged" even though the
          # same package/version is about to become publicly visible.
          wait_for_published_version() {
            name="$1"
            for attempt in $(seq 1 12); do
              if npm view "$name@$VERSION" version >/dev/null 2>&1; then
                return 0
              fi
              if [ "$attempt" -lt 12 ]; then
                sleep 10
              fi
            done
            return 1
          }

          publish_dir() {
            dir="$1"
            packed="${2:-}"
            name=$(node -p "require('./$dir/package.json').name")
            if npm view "$name@$VERSION" version >/dev/null 2>&1; then
              echo "$name@$VERSION already published, skipping"
              return 0
            fi
            if [ -z "$packed" ]; then
              tarball=$(cd "$dir" && pnpm pack --silent | tail -1)
              packed="$dir/$tarball"
            fi
            if npm publish "$packed" $PROVENANCE --access public; then
              return 0
            else
              publish_status=$?
            fi
            echo "$name@$VERSION publish failed; waiting for registry visibility before retrying"
            if wait_for_published_version "$name"; then
              echo "$name@$VERSION is now published; treating the publish as successful"
              return 0
            fi
            return "$publish_status"
          }

          publish_dir packages/runtime
          publish_dir packages/runtime-darwin-arm64
          publish_dir packages/llvm-darwin-arm64 "$HELPER_TARBALL"
          publish_dir packages/runtime-linux-x64-gnu
          publish_dir packages/llvm-linux-x64-gnu
          publish_dir packages/runtime-linux-arm64-gnu
          publish_dir packages/llvm-linux-arm64-gnu
          publish_dir packages/runtime-linux-x64-musl
          publish_dir packages/llvm-linux-x64-musl
          publish_dir packages/runtime-linux-arm64-musl
          publish_dir packages/llvm-linux-arm64-musl
          publish_dir packages/runtime-wasm32-wasi
          publish_dir packages/runtime-win32-x64-msvc
          publish_dir packages/llvm-win32-x64-msvc
          publish_dir packages/compiler
          publish_dir packages/cli
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  # The GitHub release is a tag, notes, and one asset: the surface
  # manifest (packages/compiler/surface-manifest.json — the machine-
  # readable listing of the surface the static tier compiles at this
  # version, regenerated here and verified against the committed file).
  # The platform helper ships through its npm package rather than as a GitHub
  # release asset, so this job runs AFTER a successful npm publish and never
  # gates it. The body is the CHANGELOG.md block between the
  # release:start/release:end markers, which RELEASING.md keeps on the
  # latest entry only.
  github-release:
    name: Create GitHub Release
    needs: [check-release, publish]
    if: needs.check-release.outputs.should_release == 'true'
    runs-on: ubuntu-latest
    timeout-minutes: 10
    permissions:
      contents: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Setup pnpm
        uses: pnpm/action-setup@v4
        with:
          version: 11.1.3

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "24"

      # Regenerate the surface manifest from this tree and require it to
      # match the committed file byte-for-byte — the same staleness guard
      # the test suite runs — so the attached asset is provably the
      # manifest of the code being released.
      - name: Generate surface manifest
        run: |
          pnpm install --frozen-lockfile
          pnpm manifest --check

      - name: Extract changelog entry
        run: |
          VERSION="${{ needs.check-release.outputs.version }}"
          awk '/<!-- release:start -->/{found=1; next} /<!-- release:end -->/{exit} found{print}' CHANGELOG.md > /tmp/release-notes.md

          LINES=$(wc -l < /tmp/release-notes.md | tr -d ' ')
          if [ "$LINES" -lt 2 ]; then
            echo "Error: No release notes found between <!-- release:start --> and <!-- release:end --> markers in CHANGELOG.md"
            exit 1
          fi
          echo "Extracted release notes for $VERSION ($LINES lines)"

      - name: Create GitHub Release
        run: |
          VERSION="${{ needs.check-release.outputs.version }}"
          TAG="v$VERSION"

          if gh release view "$TAG" &>/dev/null; then
            echo "Release $TAG already exists, skipping creation"
          else
            echo "Creating release $TAG..."
            gh release create "$TAG" \
              --target "$GITHUB_SHA" \
              --title "$TAG" \
              --notes-file /tmp/release-notes.md
          fi

          # Attach the surface manifest (idempotent: --clobber makes
          # re-runs replace the asset instead of failing).
          gh release upload "$TAG" packages/compiler/surface-manifest.json --clobber
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}