ci: upload coverage artifacts to Codecov

Author: paduszyk

.github/codecov.yml

@@ -0,0 +1,13 @@
+codecov:
+  branch: main
+
+coverage:
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 0%
+    patch:
+      default:
+        target: auto
+        threshold: 0%

.github/workflows/package-ci.yml

@@ -64,3 +64,17 @@ jobs:
       - uses: actions/checkout@v4
       - uses: wntrblm/nox@main
       - run: nox -s "${{ matrix.session }}"
+      - uses: actions/upload-artifact@v4
+        with:
+          name: coverage_${{ matrix.session }}
+          path: coverage.xml
+  codecov:
+    needs:
+      - test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/download-artifact@v4
+      - uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}

docs/README.md

@@ -2,6 +2,7 @@
 
 [![Pre-commit.ci](https://results.pre-commit.ci/badge/github/paduszyk/django-management-commands/main.svg)][pre-commit.ci]
 [![CI](https://img.shields.io/github/actions/workflow/status/paduszyk/django-management-commands/package-ci.yml?logo=github&label=CI)][ci]
+[![Codecov](https://img.shields.io/codecov/c/github/paduszyk/django-management-commands?logo=codecov)][codecov]
 
 [![Nox](https://img.shields.io/badge/%f0%9f%a6%8a-Nox-d85e00)][nox]
 [![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)][ruff]
@@ -14,6 +15,7 @@
 Released under the [MIT license][license].
 
 [ci]: https://github.com/paduszyk/django-management-commands/actions/workflows/package-ci.yml
+[codecov]: https://app.codecov.io/gh/paduszyk/django-management-commands
 [conventional-commits]: https://www.conventionalcommits.org/
 [license]: https://github.com/paduszyk/django-management-commands/blob/main/LICENSE
 [mypy]: https://mypy.readthedocs.io