Add code coverage CI workflow with line coverage reporting

.github/workflows/coverage.yml

@@ -0,0 +1,69 @@
+name: Code Coverage
+
+on:
+  push:
+    branches: [main, release-*]
+    paths-ignore: ['**.md', '**.png', '**.jpg', '**.svg', '**/docs/**']
+  pull_request:
+    branches: [main, release-*]
+    paths-ignore: ['**.md', '**.png', '**.jpg', '**.svg', '**/docs/**']
+
+permissions:
+  contents: read
+
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24.2'
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Run tests with coverage
+        run: |
+          sudo make test-coverage
+
+      - name: Generate coverage report
+        run: |
+          go tool cover -func=coverage.out > coverage.txt
+
+      - name: Display coverage summary
+        run: |
+          echo "## Code Coverage Report" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+          tail -1 coverage.txt >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "<details><summary>Detailed Coverage by Package</summary>" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+          cat coverage.txt >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "</details>" >> $GITHUB_STEP_SUMMARY
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          file: ./coverage.out
+          flags: unittests
+          name: codecov-umbrella
+          fail_ci_if_error: false
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.gitignore

@@ -4,4 +4,6 @@
 /output
 /cover.out.tmp
 /coverage.log
+/coverage.out
+/coverage.txt
 .vscode

Makefile

@@ -13,14 +13,38 @@ REVISION=$(shell git rev-parse HEAD)$(shell if ! git diff --no-ext-diff --quiet
 
 RELEASE_INFO = -X main.revision=${REVISION} -X main.gitVersion=${VERSION} -X main.buildTime=${BUILD_TIMESTAMP}
 
-.PHONY: release test
+.PHONY: release test test-coverage
 
 release:
 	@CGO_ENABLED=0 ${PROXY} GOOS=linux GOARCH=${GOARCH} go vet -tags disable_libgit2 $(PACKAGES)
 	@CGO_ENABLED=0 ${PROXY} GOOS=linux GOARCH=${GOARCH} go build -tags disable_libgit2 -ldflags '${RELEASE_INFO} -w -extldflags "-static"' -o ./ ./cmd/model-csi-driver
 	@CGO_ENABLED=0 ${PROXY} GOOS=linux GOARCH=${GOARCH} go build -tags disable_libgit2 -ldflags '${RELEASE_INFO} -w -extldflags "-static"' -o ./ ./cmd/model-csi-cli
 
 test:
-	go list ./... | grep -v -E github.com/modelpack/model-csi-driver/pkg/server | xargs go test -tags disable_libgit2 -race -v -timeout 10m
-	go test -tags disable_libgit2 -race -c -o ./server.test github.com/modelpack/model-csi-driver/pkg/server
-	sudo CONFIG_PATH=./test/testdata/config.test.yaml ./server.test -test.v -test.timeout 10m
+	@echo "Running tests for all packages except pkg/server (requires sudo)..."
+	@go list ./... | grep -v -E github.com/modelpack/model-csi-driver/pkg/server | xargs go test -tags disable_libgit2 -race -v -timeout 10m
+	@echo "Running tests for pkg/server (with sudo)..."
+	@go test -tags disable_libgit2 -race -c -o ./server.test github.com/modelpack/model-csi-driver/pkg/server
+	@sudo CONFIG_PATH=./test/testdata/config.test.yaml ./server.test -test.v -test.timeout 10m
+	@rm -f ./server.test
+	@echo "All tests completed successfully!"
+
+test-coverage:
+	@echo "mode: atomic" > coverage.out
+	@echo "Running tests with coverage for non-server packages..."
+	@for pkg in $$(go list ./... | grep -v -E github.com/modelpack/model-csi-driver/pkg/server); do \
+		go test -tags disable_libgit2 -race -coverprofile=coverage.tmp -covermode=atomic -timeout 10m $$pkg || exit 1; \
+		if [ -f coverage.tmp ]; then \
+			tail -n +2 coverage.tmp >> coverage.out; \
+			rm coverage.tmp; \
+		fi; \
+	done
+	@echo "Running tests with coverage for pkg/server..."
+	@go test -tags disable_libgit2 -race -covermode=atomic -c -o ./server.test github.com/modelpack/model-csi-driver/pkg/server
+	@sudo CONFIG_PATH=./test/testdata/config.test.yaml ./server.test -test.coverprofile=coverage.server.out -test.timeout 10m || exit 1
+	@if [ -f coverage.server.out ]; then \
+		tail -n +2 coverage.server.out >> coverage.out; \
+		rm coverage.server.out; \
+	fi
+	@rm -f ./server.test
+	@echo "Coverage report generated: coverage.out"