ci: create test coverage badge

Author: tiborpilz

.github/workflows/test.yml

@@ -37,3 +37,36 @@ jobs:
         env:
           DEEPSOURCE_DSN: ${{ secrets.DEEPSOURCE_DSN }}
           BADGE_PATH: ${{ steps.extract_branch.outputs.branch }}/test-badge.svg
+
+      - name: Generate the badge SVG image
+        uses: emibcn/[email protected]
+        id: badge
+        with:
+          label: 'Test coverage'
+          status: ${{ steps.coverage.outputs.lines }}
+          color: 'blue,555,daf'
+          path: ${{ steps.coverage.outputs.path }}
+
+      - name: Upload badge as artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: badge
+          path: ${{ steps.coverage.outputs.path }}
+          if-no-files-found: error
+
+      - name: Commit badge
+        continue-on-error: true
+        env:
+          BADGE: ${{ steps.coverage.outputs.path }}
+        run: |
+          git config --local user.email "[email protected]"
+          git config --local user.name "GitHub Action"
+          git add "${BADGE}"
+          git commit -m "Add/Update badge"
+
+      - name: Push badge commit
+        uses: ad-m/github-push-action@master
+        if: ${{ success() }}
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          branch: ${{ steps.coverage.outputs.branch }}