run coverage check on PRs

.github/workflows/coverage.yml

@@ -0,0 +1,31 @@
+name: Coverage
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    name: Coverage
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3'
+      - name: Check Python version
+        run: python --version
+      - name: Install graphviz
+        run: sudo apt-get install graphviz
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install .[test] pytest-cov
+      - name: Test with pytest
+        run: python -m pytest -vv --cov . --cov-append --cov-config pyproject.toml
+        env:
+          VIRTUALENV_SYSTEM_SITE_PACKAGES: '1'
+      - name: codecov
+        uses: codecov/codecov-action@v3

.github/workflows/main.yml

@@ -141,29 +141,3 @@ jobs:
       env:
         PYTHONWARNINGS: "error"  # treat all warnings as errors
         DO_EPUBCHECK: "1"
-
-  coverage:
-    if: github.event_name == 'push' && github.repository_owner == 'sphinx-doc'
-    runs-on: ubuntu-latest
-    name: Coverage
-
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: "3"
-    - name: Check Python version
-      run: python --version
-    - name: Install graphviz
-      run: sudo apt-get install graphviz
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        python -m pip install .[test] pytest-cov
-    - name: Test with pytest
-      run: python -m pytest -vv --cov . --cov-append --cov-config pyproject.toml
-      env:
-        VIRTUALENV_SYSTEM_SITE_PACKAGES: "1"
-    - name: codecov
-      uses: codecov/codecov-action@v3