release.yml

name: Checks and release

on:
  push:
    branches:
      - main
  pull_request:
    types: [opened, synchronize, reopened]
  # Manual release support - consolidated here to work with npm trusted publishing
  # npm only allows ONE workflow file as trusted publisher, so all publishing
  # must go through this workflow (release.yml)
  workflow_dispatch:
    inputs:
      release_mode:
        description: 'Manual release mode'
        required: true
        type: choice
        default: 'instant'
        options:
          - instant
          - changeset-pr
      bump_type:
        description: 'Manual release type'
        required: true
        type: choice
        options:
          - patch
          - minor
          - major
      description:
        description: 'Manual release description (optional)'
        required: false
        type: string

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

jobs:
  # === DETECT CHANGES - determines which jobs should run ===
  detect-changes:
    name: Detect Changes
    runs-on: ubuntu-latest
    if: github.event_name != 'workflow_dispatch'
    outputs:
      mjs-changed: ${{ steps.changes.outputs.mjs-changed }}
      js-changed: ${{ steps.changes.outputs.js-changed }}
      package-changed: ${{ steps.changes.outputs.package-changed }}
      docs-changed: ${{ steps.changes.outputs.docs-changed }}
      workflow-changed: ${{ steps.changes.outputs.workflow-changed }}
      any-code-changed: ${{ steps.changes.outputs.any-code-changed }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Detect changes
        id: changes
        env:
          GITHUB_EVENT_NAME: ${{ github.event_name }}
          GITHUB_BASE_SHA: ${{ github.event.pull_request.base.sha }}
          GITHUB_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
        run: node scripts/detect-code-changes.mjs

  # === VERSION CHANGE CHECK ===
  # Prohibit manual version changes in package.json - versions should only be changed by CI/CD
  version-check:
    name: Check for Manual Version Changes
    runs-on: ubuntu-latest
    if: github.event_name == 'pull_request'
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check for version changes in package.json
        env:
          GITHUB_HEAD_REF: ${{ github.head_ref }}
          GITHUB_BASE_REF: ${{ github.base_ref }}
        run: node scripts/check-version.mjs

  # === CHANGESET CHECK - only runs on PRs with code changes ===
  # Docs-only PRs (./docs folder, markdown files) don't require changesets
  changeset-check:
    name: Check for Changesets
    runs-on: ubuntu-latest
    needs: [detect-changes]
    if: github.event_name == 'pull_request' && needs.detect-changes.outputs.any-code-changed == 'true'
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20.x'

      - name: Install dependencies
        run: npm install

      - name: Check for changesets
        env:
          # Pass PR context to the validation script
          GITHUB_BASE_REF: ${{ github.base_ref }}
          GITHUB_BASE_SHA: ${{ github.event.pull_request.base.sha }}
          GITHUB_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
        run: |
          # Skip changeset check for automated version PRs
          if [[ "${{ github.head_ref }}" == "changeset-release/"* ]]; then
            echo "Skipping changeset check for automated release PR"
            exit 0
          fi

          # Run changeset validation script
          # This validates that exactly ONE changeset was ADDED by this PR
          # Pre-existing changesets from other merged PRs are ignored
          node scripts/validate-changeset.mjs

  # === LINT AND FORMAT CHECK ===
  # Lint runs independently of changeset-check - it's a fast check that should always run
  # See: https://github.com/link-assistant/hive-mind/pull/1024 for why this dependency was removed
  # IMPORTANT: ESLint includes max-lines rule (1500 lines) to ensure files stay maintainable
  # See docs/case-studies/issue-23 for why fresh merge simulation is critical
  lint:
    name: Lint and Format Check
    runs-on: ubuntu-latest
    needs: [detect-changes]
    if: |
      github.event_name == 'push' ||
      needs.detect-changes.outputs.mjs-changed == 'true' ||
      needs.detect-changes.outputs.js-changed == 'true' ||
      needs.detect-changes.outputs.docs-changed == 'true' ||
      needs.detect-changes.outputs.package-changed == 'true' ||
      needs.detect-changes.outputs.workflow-changed == 'true'
    steps:
      - uses: actions/checkout@v4
        with:
          # For PRs, fetch enough history to merge with base branch
          fetch-depth: 0

      - name: Simulate fresh merge with base branch (PR only)
        if: github.event_name == 'pull_request'
        env:
          BASE_REF: ${{ github.base_ref }}
        run: |
          echo "=== Synchronizing PR with latest $BASE_REF ==="
          echo "This prevents stale merge preview issues (see docs/case-studies/issue-23)"
          echo ""

          # Configure git for merge
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git config user.name "github-actions[bot]"

          # Fetch the latest base branch
          echo "Fetching latest $BASE_REF..."
          git fetch origin "$BASE_REF"

          # Get current and base branch info
          CURRENT_SHA=$(git rev-parse HEAD)
          BASE_SHA=$(git rev-parse "origin/$BASE_REF")

          echo "Current checkout (merge preview): $CURRENT_SHA"
          echo "Latest base branch ($BASE_REF): $BASE_SHA"
          echo ""

          # Check if base branch has new commits not in the merge preview
          BEHIND_COUNT=$(git rev-list --count HEAD..origin/$BASE_REF)

          if [ "$BEHIND_COUNT" -eq 0 ]; then
            echo "Merge preview is up-to-date with $BASE_REF. No simulation needed."
          else
            echo "Base branch has $BEHIND_COUNT new commit(s) since PR was opened/synced."
            echo "Simulating fresh merge to validate actual merge result..."
            echo ""

            # Attempt to merge the latest base branch
            if git merge origin/$BASE_REF --no-edit; then
              echo ""
              echo "Fresh merge simulation successful!"
              echo "Checks will now run against the up-to-date merged state."
            else
              echo ""
              echo "::error::Merge conflict detected! PR needs to be rebased/updated before it can be merged."
              echo "The PR branch is out of sync with $BASE_REF and cannot be automatically merged."
              exit 1
            fi
          fi
          echo ""

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20.x'

      - name: Install dependencies
        run: npm install

      - name: Run ESLint
        run: npm run lint

      - name: Check formatting
        run: npm run format:check

      - name: Check code duplication
        run: npm run check:duplication

  # Test matrix: 3 runtimes (Node.js, Bun, Deno) x 3 OS (Ubuntu, macOS, Windows)
  # IMPORTANT: Tests must validate the ACTUAL merge result, not a stale merge preview.
  # See docs/case-studies/issue-23 for why this is critical.
  test:
    name: Test (${{ matrix.runtime }} on ${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    needs: [detect-changes, changeset-check]
    # Run if: push event, OR changeset-check succeeded, OR changeset-check was skipped (docs-only PR)
    if: always() && (github.event_name == 'push' || needs.changeset-check.result == 'success' || needs.changeset-check.result == 'skipped')
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        runtime: [node, bun, deno]
    steps:
      - uses: actions/checkout@v4
        with:
          # For PRs, fetch enough history to merge with base branch
          fetch-depth: 0

      - name: Simulate fresh merge with base branch (PR only)
        if: github.event_name == 'pull_request'
        env:
          BASE_REF: ${{ github.base_ref }}
        shell: bash
        run: |
          echo "=== Synchronizing PR with latest $BASE_REF ==="
          echo "This prevents stale merge preview issues (see docs/case-studies/issue-23)"
          echo ""

          # Configure git for merge
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git config user.name "github-actions[bot]"

          # Fetch the latest base branch
          echo "Fetching latest $BASE_REF..."
          git fetch origin "$BASE_REF"

          # Get current and base branch info
          CURRENT_SHA=$(git rev-parse HEAD)
          BASE_SHA=$(git rev-parse "origin/$BASE_REF")

          echo "Current checkout (merge preview): $CURRENT_SHA"
          echo "Latest base branch ($BASE_REF): $BASE_SHA"
          echo ""

          # Check if base branch has new commits not in the merge preview
          BEHIND_COUNT=$(git rev-list --count HEAD..origin/$BASE_REF)

          if [ "$BEHIND_COUNT" -eq 0 ]; then
            echo "Merge preview is up-to-date with $BASE_REF. No simulation needed."
          else
            echo "Base branch has $BEHIND_COUNT new commit(s) since PR was opened/synced."
            echo "Simulating fresh merge to validate actual merge result..."
            echo ""

            # Attempt to merge the latest base branch
            if git merge origin/$BASE_REF --no-edit; then
              echo ""
              echo "Fresh merge simulation successful!"
              echo "Checks will now run against the up-to-date merged state."
            else
              echo ""
              echo "::error::Merge conflict detected! PR needs to be rebased/updated before it can be merged."
              echo "The PR branch is out of sync with $BASE_REF and cannot be automatically merged."
              exit 1
            fi
          fi
          echo ""

      - name: Setup Node.js
        if: matrix.runtime == 'node'
        uses: actions/setup-node@v4
        with:
          node-version: '20.x'

      - name: Install dependencies (Node.js)
        if: matrix.runtime == 'node'
        run: npm install

      - name: Run tests (Node.js)
        if: matrix.runtime == 'node'
        run: npm test

      - name: Setup Bun
        if: matrix.runtime == 'bun'
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: latest

      - name: Install dependencies (Bun)
        if: matrix.runtime == 'bun'
        run: bun install

      - name: Run tests (Bun)
        if: matrix.runtime == 'bun'
        run: bun test

      - name: Setup Deno
        if: matrix.runtime == 'deno'
        uses: denoland/setup-deno@v2
        with:
          deno-version: v2.x

      - name: Run tests (Deno)
        if: matrix.runtime == 'deno'
        run: deno test --allow-read

  # Release - only runs on main after tests pass (for push events)
  release:
    name: Release
    needs: [lint, test]
    # Use always() to ensure this job runs even if changeset-check was skipped
    # This is needed because lint/test jobs have a transitive dependency on changeset-check
    if: always() && github.ref == 'refs/heads/main' && github.event_name == 'push' && needs.lint.result == 'success' && needs.test.result == 'success'
    runs-on: ubuntu-latest
    # Permissions required for npm OIDC trusted publishing
    permissions:
      contents: write
      pull-requests: write
      id-token: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20.x'
          registry-url: 'https://registry.npmjs.org'

      - name: Install dependencies
        run: npm install

      - name: Update npm for OIDC trusted publishing
        run: node scripts/setup-npm.mjs

      - name: Check for changesets
        id: check_changesets
        run: node scripts/check-changesets.mjs

      - name: Merge multiple changesets
        if: steps.check_changesets.outputs.has_changesets == 'true' && steps.check_changesets.outputs.changeset_count > 1
        run: |
          echo "Multiple changesets detected, merging..."
          node scripts/merge-changesets.mjs

      - name: Version packages and commit to main
        if: steps.check_changesets.outputs.has_changesets == 'true'
        id: version
        run: node scripts/version-and-commit.mjs --mode changeset

      - name: Publish to npm
        # Run if version was committed OR if a previous attempt already committed (for re-runs)
        if: steps.version.outputs.version_committed == 'true' || steps.version.outputs.already_released == 'true'
        id: publish
        run: node scripts/publish-to-npm.mjs --should-pull

      - name: Create GitHub Release
        if: steps.publish.outputs.published == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: node scripts/create-github-release.mjs --release-version "${{ steps.publish.outputs.published_version }}" --repository "${{ github.repository }}"

      - name: Format GitHub release notes
        if: steps.publish.outputs.published == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: node scripts/format-github-release.mjs --release-version "${{ steps.publish.outputs.published_version }}" --repository "${{ github.repository }}" --commit-sha "${{ github.sha }}"

  # Manual Instant Release - triggered via workflow_dispatch with instant mode
  # This job is in release.yml because npm trusted publishing
  # only allows one workflow file to be registered as a trusted publisher
  instant-release:
    name: Instant Release
    if: github.event_name == 'workflow_dispatch' && github.event.inputs.release_mode == 'instant'
    runs-on: ubuntu-latest
    # Permissions required for npm OIDC trusted publishing
    permissions:
      contents: write
      pull-requests: write
      id-token: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20.x'
          registry-url: 'https://registry.npmjs.org'

      - name: Install dependencies
        run: npm install

      - name: Update npm for OIDC trusted publishing
        run: node scripts/setup-npm.mjs

      - name: Version packages and commit to main
        id: version
        run: node scripts/version-and-commit.mjs --mode instant --bump-type "${{ github.event.inputs.bump_type }}" --description "${{ github.event.inputs.description }}"

      - name: Publish to npm
        # Run if version was committed OR if a previous attempt already committed (for re-runs)
        if: steps.version.outputs.version_committed == 'true' || steps.version.outputs.already_released == 'true'
        id: publish
        run: node scripts/publish-to-npm.mjs

      - name: Create GitHub Release
        if: steps.publish.outputs.published == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: node scripts/create-github-release.mjs --release-version "${{ steps.publish.outputs.published_version }}" --repository "${{ github.repository }}"

      - name: Format GitHub release notes
        if: steps.publish.outputs.published == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: node scripts/format-github-release.mjs --release-version "${{ steps.publish.outputs.published_version }}" --repository "${{ github.repository }}" --commit-sha "${{ github.sha }}"

  # Manual Changeset PR - creates a pull request with the changeset for review
  changeset-pr:
    name: Create Changeset PR
    if: github.event_name == 'workflow_dispatch' && github.event.inputs.release_mode == 'changeset-pr'
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20.x'

      - name: Install dependencies
        run: npm install

      - name: Create changeset file
        run: node scripts/create-manual-changeset.mjs --bump-type "${{ github.event.inputs.bump_type }}" --description "${{ github.event.inputs.description }}"

      - name: Format changeset with Prettier
        run: |
          # Run Prettier on the changeset file to ensure it matches project style
          npx prettier --write ".changeset/*.md" || true

          echo "Formatted changeset files"

      - name: Create Pull Request
        uses: peter-evans/create-pull-request@v7
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: 'chore: add changeset for manual ${{ github.event.inputs.bump_type }} release'
          branch: changeset-manual-release-${{ github.run_id }}
          delete-branch: true
          title: 'chore: manual ${{ github.event.inputs.bump_type }} release'
          body: |
            ## Manual Release Request

            This PR was created by a manual workflow trigger to prepare a **${{ github.event.inputs.bump_type }}** release.

            ### Release Details
            - **Type:** ${{ github.event.inputs.bump_type }}
            - **Description:** ${{ github.event.inputs.description || 'Manual release' }}
            - **Triggered by:** @${{ github.actor }}

            ### Next Steps
            1. Review the changeset in this PR
            2. Merge this PR to main
            3. The automated release workflow will create a version PR
            4. Merge the version PR to publish to npm and create a GitHub release