publish coverage in github pull requests (#33)

Author: cyrilst

.github/workflows/tests.yml

@@ -31,6 +31,48 @@ jobs:
       - name: Run checks
         run: make get-deps check
 
+      - name: Upload coverage artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-${{ matrix.go }}
+          path: test/coverage.out
+
+  coverage:
+    name: Publish Coverage
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Download coverage artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: coverage-stable
+
+      - name: Setup go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 'stable'
+
+      - name: Convert go coverage to corbetura format
+        run: |
+          go install github.com/boumenot/gocover-cobertura@latest
+          gocover-cobertura -by-files < coverage.out > coverage.xml
+
+      - name: Get PR number
+        uses: jwalton/gh-find-current-pr@v1
+        id: finder
+
+      - name: Add Coverage PR Comment
+        uses: 5monkeys/cobertura-action@master
+        with:
+          path: coverage.xml
+          skip_covered: false
+          minimum_coverage: 0
+          fail_below_threshold: true
+          pull_request_number: ${{ steps.finder.outputs.pr }}
+
   test:
     name: Docker tests
     runs-on: ubuntu-latest