update-copier.yml

name: Update repo with copier
on:
  schedule:
    - cron: "0 2 * * 1" # Every Monday at 2am
  workflow_dispatch:
    inputs:
      automerge:
        description: "enable automerge"
        required: false
        type: boolean
        default: false

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: write
  pull-requests: write

env:
  COPIER_OPTIONS: "--trust -A -r main -c 3"
  AUTOMERGE: "false"

jobs:
  update:
    name: Update template
    runs-on: ubuntu-latest
    environment:
      name: pull-request
    strategy:
      fail-fast: true
      matrix:
        include:
          - add-paths: .
            body: Use this to merge the changes to this repository.
            branch: copier/update
            commit-message: "chore(template): accept new copier update"
            title: "chore(template): accept new copier update"
          # - add-paths: .copier-answers.yml
          #   body: Use this to reject the changes to this repository.
          #   branch: copier/reject
          #   commit-message: "chore(template): reject new copier update"
          #   title: "chore(template): reject new copier update"
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          persist-credentials: false
          fetch-depth: 0
      - uses: ./.github/actions/setup-cached-uv-and-python
        with:
          python-version-file: ".python-version"
          cache-dependency-path: requirements/lock/uvx-tools.txt
      - name: Install copier
        run:
          uv tool install -crequirements/lock/uvx-tools.txt --with
          copier-template-extensions copier
      - name: Copier update
        continue-on-error: false
        id: check
        env:
          commit_message_in: ${{ matrix.commit-message }}
        run: |
          changed='false'
          conflict_message=''
          commit_message="$commit_message_in"
          automergeable='true'

          if [ -f .copier-answers.yml ]; then
            copier update ${{ env.COPIER_OPTIONS }}
            if ! git diff --quiet -- .copier-answers.yml; then
              changed='true'
            fi
          else
            echo "No .copier-answers.yml file"
            exit 1
          fi

          # determine if have any merge conflicts
          if [ "$changed" = "true" ]; then
            if ! git merge --no-commit --no-ff; then
              automergeable='false'
              conflict_message="Resolve conflicts."
              commit_message="$commit_message [skip ci]"
            # check for new untracked files
            elif git status --porcelain | grep -q '^??'; then
              automergeable='false'
            fi
          fi

          echo "automergeable=$automergeable" >> "$GITHUB_OUTPUT"
          echo "changed=$changed" >> "$GITHUB_OUTPUT"
          echo "conflict_message=$conflict_message" >> "$GITHUB_OUTPUT"
          echo "commit_message=$commit_message" >> "$GITHUB_OUTPUT"

          echo "files_changed<<EOF" >> "$GITHUB_OUTPUT"
          git status --short | sort >> "$GITHUB_OUTPUT"
          echo "EOF" >> "$GITHUB_OUTPUT"

          # git config
          if [ "$changed" = "true" ]; then
            git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
            git config --global user.name "github-actions[bot]"
            git restore --staged .
          fi
        shell: bash -eux {0}

      - name: Create pull request
        if: steps.check.outputs.changed == 'true'
        id: cpr
        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
        with:
          token: ${{ secrets.PAT }}
          add-paths: ${{ matrix.add-paths }}
          commit-message: ${{ steps.check.outputs.commit_message }}
          title: ${{ matrix.title }}
          labels: |
            internal
            template_update
          branch: ${{ matrix.branch }}
          delete-branch: true
          # branch-suffix: timestamp  # If want commit per run (instead of per workflow)
          body: |
            This is an autogenerated PR. ${{ matrix.body }} ${{ steps.check.outputs.conflict_message }}

            Files changed (`git status --short`):
            ${{ steps.check.outputs.files_changed }}

            [copier](https://github.com/copier-org/copier) has detected updates from the Cookiecutter repository.

      - name: Pull request info
        if: ${{ steps.cpr.outputs.pull-request-number }}
        env:
          NUMBER: ${{ steps.cpr.outputs.pull-request-number }}
          URL: ${{ steps.cpr.outputs.pull-request-url }}
          OPERATION: ${{ steps.cpr.outputs.pull-request-operation }}
          SHA: ${{ steps.cpr.outputs.pull-request-sha }}
          BRANCH: ${{ steps.cpr.outputs.pull-request-branch }}
          VERIFIED: ${{ steps.cpr.outputs.pull-request-commits-verified }}
        run: |
          echo "Pull Request Number    - $NUMBER"
          echo "Pull Request URL       - $URL"
          echo "Pull Request Operation - $OPERATION"
          echo "Pull Request SHA       - $SHA"
          echo "Pull Request BRANCH    - $BRANCH"
          echo "Pull Request VERIFIED  - $VERIFIED"

      - name: automerge
        if:
          ${{ (inputs.automerge || env.AUTOMERGE == 'true') &&
          steps.cpr.outputs.pull-request-number &&
          steps.check.outputs.conflict_message == ''  &&
          steps.check.outputs.automergeable == 'true' }}
        env:
          NUMBER: ${{ steps.cpr.outputs.pull-request-number }}
          # Need PAT if want to start other actions.  Use GITHUB_TOKEN if not.
          GH_TOKEN: ${{ secrets.PAT }}
        run: |
          gh pr merge -m --auto "$NUMBER"