check-version.yml

# Check for changes in the upstream template. If changes are found, an issue is created.
name: Template check

on:
  workflow_dispatch:
  schedule:
    - cron: '0 0 1 * *' # Runs at 00:00 UTC on the 1st day of every month

defaults:
  run:
    shell: bash --noprofile --norc -euo pipefail {0}

jobs:
  copier-check-update:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      issues: write
    env:
      ISSUE_TITLE: Template update available
    steps:
      - uses: actions/checkout@v4

      - name: Install uv
        uses: astral-sh/setup-uv@v5

      - name: Check for template updates
        id: copier_check_update
        run: |
          update_json="$(uvx --from 'copier>=9.15.2' copier check-update --output-format json)"
          echo "$update_json"
          {
            echo "update_available=$(jq -r '.update_available // false' <<< "$update_json")"
            echo "current_version=$(jq -r '.current_version // "unknown"' <<< "$update_json")"
            echo "latest_version=$(jq -r '.latest_version // "unknown"' <<< "$update_json")"
          } >> "$GITHUB_OUTPUT"

      - name: Check for existing update issue
        if: steps.copier_check_update.outputs.update_available == 'true'
        id: existing_issue
        run: |
          issue_count="$(gh issue list \
            --repo "${{ github.repository }}" \
            --state open \
            --search "$ISSUE_TITLE in:title" \
            --json title \
            --jq "map(select(.title == \"$ISSUE_TITLE\")) | length")"
          if [[ "$issue_count" -gt 0 ]]; then
            echo "exists=true" >> "$GITHUB_OUTPUT"
          else
            echo "exists=false" >> "$GITHUB_OUTPUT"
          fi
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Open update issue
        if: steps.copier_check_update.outputs.update_available == 'true' && steps.existing_issue.outputs.exists != 'true'
        run: |
          gh issue create \
            --repo "${{ github.repository }}" \
            --title "$ISSUE_TITLE" \
            --body "A new version of the Modelblocks data module template is available.

          Current template version: ${{ steps.copier_check_update.outputs.current_version }}
          Latest template version: ${{ steps.copier_check_update.outputs.latest_version }}

          Please update this project using:

          \`\`\`shell
          copier update --skip-answered --defaults
          \`\`\`

          Review the resulting changes before merging them."
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}