update-ty.yml

name: Update ty Version Monthly

on:
  schedule:
    # Run on the 1st of every month at 00:00 UTC
    - cron: '0 0 1 * *'
  workflow_dispatch:  # Allow manual triggering

jobs:
  update-ty:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v7

      - name: Get latest ty version
        run: |
          LATEST_VERSION=$(curl -s https://pypi.org/pypi/ty/json | jq -r '.info.version')
          echo "TY_VERSION=$LATEST_VERSION" >> $GITHUB_ENV
          echo "Latest ty version: $LATEST_VERSION"

          if grep -q '"ty==' pyproject.toml; then
            CURRENT_VERSION=$(grep '"ty==' pyproject.toml | sed -E 's/.*ty==([0-9]+\.[0-9]+\.[0-9]+).*/\1/')
            echo "CURRENT_VERSION=$CURRENT_VERSION" >> $GITHUB_ENV
            echo "Current ty version: $CURRENT_VERSION"

            if [ "$LATEST_VERSION" = "$CURRENT_VERSION" ]; then
              echo "Already using the latest version of ty. No updates needed."
              echo "NEEDS_UPDATE=false" >> $GITHUB_ENV
            else
              echo "NEEDS_UPDATE=true" >> $GITHUB_ENV
            fi
          else
            echo "No ty version found in pyproject.toml"
            echo "NEEDS_UPDATE=true" >> $GITHUB_ENV
          fi

      - name: Update ty version in pyproject.toml
        if: env.NEEDS_UPDATE == 'true'
        run: |
          sed -i -E 's/"ty==([0-9]+\.[0-9]+\.[0-9]+)"/"ty==${{ env.TY_VERSION }}"/' pyproject.toml

      - name: Update ty version in prek.toml
        if: env.NEEDS_UPDATE == 'true'
        run: |
          sed -i -E '/repo = "https:\/\/github.com\/astral-sh\/ty-pre-commit"/,/^rev = / s/^rev = "v[0-9]+\.[0-9]+\.[0-9]+"/rev = "v${{ env.TY_VERSION }}"/' prek.toml

      - name: Install the latest version of uv
        if: env.NEEDS_UPDATE == 'true'
        uses: astral-sh/setup-uv@v7

      - name: Update the lockfile
        if: env.NEEDS_UPDATE == 'true'
        run: |
          uv lock

      - name: Run ty on the project
        # ty is pre-1.0 and new releases often add diagnostics; a failure opens
        # the PR as a draft instead of aborting the update.
        if: env.NEEDS_UPDATE == 'true'
        run: |
          set +e
          uv run --group dev ty check
          if [ $? -ne 0 ]; then
            echo "TY_CHECK_FAILED=true" >> $GITHUB_ENV
          else
            echo "TY_CHECK_FAILED=false" >> $GITHUB_ENV
          fi

      - name: Create Pull Request
        if: env.NEEDS_UPDATE == 'true'
        uses: peter-evans/create-pull-request@v8
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          # open in draft mode if ty check failed
          draft: ${{ env.TY_CHECK_FAILED }}
          commit-message: "chore(deps-dev): update ty from ${{ env.CURRENT_VERSION }} to ${{ env.TY_VERSION }}"
          title: "chore(deps-dev): update ty from ${{ env.CURRENT_VERSION }} to ${{ env.TY_VERSION }}"
          body: |
            ## ty Version Update

            This PR updates the ty version from ${{ env.CURRENT_VERSION }} to ${{ env.TY_VERSION }}.

            Changes:
            - Updated version in `pyproject.toml`
            - Updated version in `prek.toml`
            - Regenerated `uv.lock`

            ${{ env.TY_CHECK_FAILED == 'true' && '⚠️ **WARNING**: `ty check` reports new diagnostics with this version. A maintainer should fix them before merging.' || '`ty check` passes with this version.' }}

            This PR was created automatically by a GitHub Actions workflow.
          branch: chore-deps-update-ty-${{ env.TY_VERSION }}
          delete-branch: true
          labels: |
            dependencies
          add-paths: |
            pyproject.toml
            prek.toml
            uv.lock