Use local coverage

.github/workflows/tests.yml

@@ -54,10 +54,15 @@ jobs:
         run: |
           hatch run cov:test
 
-      - name: Code coverage
-        run: |
-          pip install codecov coverage[toml]
-          codecov
+      - uses: jupyterlab/maintainer-tools/.github/actions/upload-coverage@v1
+
+  coverage:
+    runs-on: ubuntu-latest
+    needs:
+      - run-tests
+    steps:
+      - uses: actions/checkout@v3
+      - uses: jupyterlab/maintainer-tools/.github/actions/report-coverage@v1
 
   test_lint:
     name: Test Lint
@@ -145,7 +150,7 @@ jobs:
   tests_check: # This job does nothing and is only used for the branch protection
     if: always()
     needs:
-      - run-tests
+      - coverage
       - test_lint
       - test_minimum_versions
       - test_prereleases

README.md

@@ -4,7 +4,6 @@
 
 [![Build Status](https://github.com/jupyter/nbconvert/actions/workflows/tests.yml/badge.svg?query=branch%3Amain++)](https://github.com/jupyter/nbconvert/actions/workflows/tests.yml/badge.svg?query=branch%3Amain++)
 [![Documentation Status](https://readthedocs.org/projects/nbconvert/badge/?version=latest)](https://nbconvert.readthedocs.io/en/latest/?badge=latest)
-[![codecov.io](https://codecov.io/gh/jupyter/nbconvert/coverage.svg?branch=main)](https://codecov.io/gh/gh/nbconvert?branch=main)
 
 The **nbconvert** tool, `jupyter nbconvert`, converts notebooks to various other
 formats via [Jinja] templates. The nbconvert tool allows you to convert an

pyproject.toml

@@ -179,6 +179,10 @@ exclude_lines = [
 "@(abc\\.)?abstractmethod",
 ]
 
+[tool.coverage.run]
+relative_files = true
+source = ["nbconvert"]
+
 [tool.mypy]
 check_untyped_defs = true
 disallow_incomplete_defs = true