pre-commit-autoupdate.yml

name: "pre-commit autoupdate"

on:
  schedule:
    - cron: 20 4 * * *

  workflow_dispatch:

jobs:
  pre-commit-autoupdate:
    name: pre-commit autoupdate
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
      contents: write

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Python 3.11
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Setup pre-commit
        run: |
          python -m pip install --upgrade pre-commit
          pre-commit --version

      - name: Run pre-commit autoupdate
        id: autoupdate
        run: |
          echo "log<<EOF" >>$GITHUB_OUTPUT
          pre-commit autoupdate | tee -a >(cat >> $GITHUB_OUTPUT)
          echo 'EOF' >> $GITHUB_OUTPUT

      - name: Check diff
        id: diff
        shell: bash
        run: |
          echo 'diff<<EOF' >> $GITHUB_OUTPUT
          git diff | tee -a >(cat >> $GITHUB_OUTPUT)
          echo 'EOF' >> $GITHUB_OUTPUT

      - name: Create PR
        if: ${{ steps.diff.outputs.diff != '' }}
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          set -xeu

          git switch -c pre-commit-autoupdate
          git add .
          git config --global user.name "pre-commit autoupdate"
          git config --global user.email "noreply@github.com"
          git commit -m "pre-commit autoupdate"

          git push --force --set-upstream origin pre-commit-autoupdate

          title="pre-commit autoupdate"
          body_file=/tmp/body
          echo '```' >> $body_file
          echo '$ pre-commit autoupdate' >> $body_file
          echo '${{steps.autoupdate.outputs.log}}' >> $body_file
          echo '```' >> $body_file
          body="$(cat $body_file)"

          pr_number=$(gh pr list -S "pre-commit autoupdate" --json number --jq '.[0].number')

          if [[ -z $pr_number ]]; then
            echo "Creating PR"
            gh pr create \
              --label dependencies \
              --title "$title" \
              --body "$body"
            exit 0
          fi

          echo "Updating PR \#${pr_number}"
          gh pr edit \
            $pr_number \
            --body "$body" \
            --title "$title"