Draft action

.github/workflows/update_references.yaml

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+name: Update references
+
+on:
+  issue_comment:
+    types: [created, edited]
+
+
+jobs:
+  update_references:
+
+    name: PR comment
+    if: ${{ github.event.issue.pull_request && contains(github.event.comment.body, 'Please generate reference screenshots') }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        python-version: ['3.7', '3.10']
+    steps:
+
+      - name: Checkout branch
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Print basic Python info
+        shell: python
+        run: |
+          import sys
+          print(sys.executable, sys.version, sep='\n')
+      - name: Install baseline deps
+        run: python -m pip install --upgrade pip setuptools wheel
+      - name: Install build deps
+        run: python -m pip install --upgrade --upgrade-strategy eager build pip setuptools wheel
+      - name: Build package
+        run: python -bb -X dev -W error -m build
+      - name: Install wheel
+        shell: bash
+        run: 'echo dist/*.whl | xargs -I % python -bb -X dev -W error -W ignore::DeprecationWarning:pip._internal.locations._distutils -W ignore::DeprecationWarning:distutils.command.install -m pip install --upgrade %[test]'
+      - name: List packages in environment
+        run: pip list
+      - name: Install Firefox
+        run: python -m playwright install firefox
+      - name: Run tests
+        shell: bash
+        run: python -I -bb -X dev -W error -m pytest --generate-reference-screenshots
+      - uses: EndBug/add-and-commit@v8
+        with:
+          add: docrepr/tests/references
+          message: 'Update references'