use coveralls native golang support (#89)

* use coveralls native golang support
* linter

.github/workflows/test.yml

@@ -8,8 +8,8 @@ on:
       - master
 
 env:
-  GO_VERSION: "1.22.4"
-  GO_LANG_CI_LINT_VERSION: "v1.59.1"
+  GO_VERSION: "1.22.5"
+  GO_LANG_CI_LINT_VERSION: "v1.60.1"
 
 name: run tests
 jobs:
@@ -35,7 +35,7 @@ jobs:
       - name: create certificates
         run: cd inttest/pki && ./mkcerts.sh
       - name: Run RabbitMQ
-        run: cd inttest/rabbitmq && docker-compose up -d
+        run: cd inttest/rabbitmq && docker compose up -d
       - name: Install Go
         if: success()
         uses: actions/setup-go@v4
@@ -46,13 +46,12 @@ jobs:
           timeout 30 sh -c "while true; do curl -s http://guest:password@localhost:15672/api/exchanges/%2f/amq.topic && break || sleep 3; done"
       - name: Run tests
         run: make test
-      - name: Convert coverage.out to coverage.lcov
-        uses: jandelgado/gcov2lcov-action@v1
       - name: Coveralls
-        uses: coverallsapp/github-action@v1.1.2
+        uses: coverallsapp/github-action@v2.3.0
         with:
           github-token: ${{ secrets.github_token }}
-          path-to-lcov: coverage.lcov
+          file: coverage.out
+          format: golang
       - name: Build release artifacts
         if: env.build_artifacts # currently disabled
         uses: goreleaser/goreleaser-action@v3

cmd/rabtap/broker_info_renderer_dot.go

@@ -262,6 +262,6 @@ func (s *brokerInfoRendererDot) renderNode(n interface{}, queueRendered map[stri
 // https://www.graphviz.org/doc/info/lang.html
 func (s *brokerInfoRendererDot) Render(rootNode *rootNode, out io.Writer) error {
 	res := s.renderNode(rootNode, map[string]bool{})
-	fmt.Fprintf(out, res.Text)
+	fmt.Fprint(out, res.Text)
 	return nil
 }