make: add task to generate coverage report

Author: dmke

.gitignore

@@ -1,4 +1,4 @@
 .DS_Store
 example/daemon/daemon
 coverage.out
-coverage.tmp
+coverage.html

Makefile

@@ -14,10 +14,20 @@ format: ## Formats all Go code
 lint: ## Runs golangci-lint on source files
 	golangci-lint run
 
+.PHONY: coverage.out
+coverage.out: $(wildcard go.*) $(wildcard **/*.go)
+	go test -race -covermode=atomic -coverprofile=$@ ./...
+
+coverage.html: coverage.out
+	go tool cover -html $< -o $@
+
 .PHONY: test
-test: ## Run all Go tests (excluding integration tests)
-	go test -race -covermode=atomic -coverprofile=coverage.out ./...
+test: coverage.out ## Run all Go tests (excluding integration tests)
 
 .PHONY: integration
 integration: ## Run Go tests (integration tests only)
 	go test -race -tags=integration -covermode=atomic -coverprofile=coverage.out ./...
+
+.PHONY: clean
+clean:
+	rm -rf coverage.*