release.yml

name: Release

on:
  push:
    tags:
      - 'v*'

jobs:
  release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v5
        with:
          fetch-depth: 0

      - name: Setup Bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: latest

      - run: bun install

      - run: bun run typecheck

      - run: bun run build

      - name: Run tests
        run: bun run test

      - name: Check release state
        id: release_state
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          package_name="$(node -p "require('./package.json').name")"
          package_version="$(node -p "require('./package.json').version")"

          echo "package_name=${package_name}" >> "$GITHUB_OUTPUT"
          echo "package_version=${package_version}" >> "$GITHUB_OUTPUT"

          if npm view "${package_name}@${package_version}" version >/dev/null 2>&1; then
            echo "npm_published=true" >> "$GITHUB_OUTPUT"
          else
            echo "npm_published=false" >> "$GITHUB_OUTPUT"
          fi

          if gh release view "${GITHUB_REF_NAME}" >/dev/null 2>&1; then
            echo "github_release_exists=true" >> "$GITHUB_OUTPUT"
          else
            echo "github_release_exists=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Setup Node.js for npm publish
        if: steps.release_state.outputs.npm_published == 'false'
        uses: actions/setup-node@v5
        with:
          node-version: '24'
          registry-url: 'https://registry.npmjs.org'

      - name: Publish to npm
        if: steps.release_state.outputs.npm_published == 'false'
        run: npm publish --access public
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

      - name: Skip npm publish
        if: steps.release_state.outputs.npm_published == 'true'
        run: |
          echo "${{ steps.release_state.outputs.package_name }}@${{ steps.release_state.outputs.package_version }} is already published; skipping npm publish."

      - name: Extract changelog for release
        if: steps.release_state.outputs.github_release_exists == 'false'
        id: changelog
        run: |
          version="${GITHUB_REF_NAME#v}"
          # Extract the changelog section for this version.
          # Use index() string match, not a regex: the version contains a literal "["
          # that a regex would interpret as a character class, matching wrong sections.
          body=$(awk -v needle="## [${version}]" '
            index($0, needle) == 1 && (length($0) == length(needle) || substr($0, length(needle)+1, 1) ~ /[ -]/) { found=1; next }
            /^## \[/ && found { exit }
            found { print }
          ' docs/CHANGELOG.md)
          echo "body<<EOF" >> "$GITHUB_OUTPUT"
          echo "$body" >> "$GITHUB_OUTPUT"
          echo "EOF" >> "$GITHUB_OUTPUT"

      - name: Create GitHub Release
        if: steps.release_state.outputs.github_release_exists == 'false'
        uses: softprops/action-gh-release@v3
        with:
          body: ${{ steps.changelog.outputs.body }}
          generate_release_notes: true
      - name: Skip GitHub Release
        if: steps.release_state.outputs.github_release_exists == 'true'
        run: |
          echo "GitHub release ${GITHUB_REF_NAME} already exists; skipping release creation."