Merge pull request kubernetes#75713 from SataQiu/fix-e2e_node-builder-20190326

Fix golint failures in test/e2e_node/builder

Author: k8s-ci-robot

hack/.golint_failures

@@ -654,7 +654,6 @@ test/e2e/storage/utils
 test/e2e/storage/vsphere
 test/e2e_kubeadm
 test/e2e_node
-test/e2e_node/builder
 test/e2e_node/remote
 test/e2e_node/runner/remote
 test/e2e_node/services

test/e2e_node/builder/build.go

@@ -37,19 +37,20 @@ var buildTargets = []string{
 	"cluster/gce/gci/mounter",
 }
 
+// BuildGo builds k8s binaries.
 func BuildGo() error {
 	klog.Infof("Building k8s binaries...")
 	k8sRoot, err := utils.GetK8sRootDir()
 	if err != nil {
-		return fmt.Errorf("failed to locate kubernetes root directory %v.", err)
+		return fmt.Errorf("failed to locate kubernetes root directory %v", err)
 	}
 	targets := strings.Join(buildTargets, " ")
 	cmd := exec.Command("make", "-C", k8sRoot, fmt.Sprintf("WHAT=%s", targets))
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
 	err = cmd.Run()
 	if err != nil {
-		return fmt.Errorf("failed to build go packages %v\n", err)
+		return fmt.Errorf("failed to build go packages %v", err)
 	}
 	return nil
 }
@@ -62,14 +63,14 @@ func getK8sBin(bin string) (string, error) {
 			return "", err
 		}
 		if _, err := os.Stat(filepath.Join(*k8sBinDir, bin)); err != nil {
-			return "", fmt.Errorf("Could not find %s under directory %s.", bin, absPath)
+			return "", fmt.Errorf("Could not find %s under directory %s", bin, absPath)
 		}
 		return filepath.Join(absPath, bin), nil
 	}
 
 	path, err := filepath.Abs(filepath.Dir(os.Args[0]))
 	if err != nil {
-		return "", fmt.Errorf("Could not find absolute path of directory containing the tests %s.", filepath.Dir(os.Args[0]))
+		return "", fmt.Errorf("Could not find absolute path of directory containing the tests %s", filepath.Dir(os.Args[0]))
 	}
 	if _, err := os.Stat(filepath.Join(path, bin)); err == nil {
 		return filepath.Join(path, bin), nil
@@ -87,6 +88,7 @@ func getK8sBin(bin string) (string, error) {
 	return "", fmt.Errorf("unable to locate %s, Can be defined using --k8s-path", bin)
 }
 
+// GetKubeletServerBin returns the path of kubelet binary.
 func GetKubeletServerBin() string {
 	bin, err := getK8sBin("kubelet")
 	if err != nil {