apply small fix to cmd utils

util/docker.go

@@ -7,11 +7,11 @@ import (
 )
 
 type DockerCmd struct {
-	*Cmd
+	Cmd
 }
 
 func NewDockerCommand(l *logrus.Entry) *DockerCmd {
-	return &DockerCmd{NewCommand(l, "helm")}
+	return &DockerCmd{*NewCommand(l, "helm")}
 }
 
 func (c DockerCmd) Build(workDir string, options ...string) *Cmd {

util/go.go

@@ -5,11 +5,11 @@ import (
 )
 
 type GoCmd struct {
-	*Cmd
+	Cmd
 }
 
 func NewGoCommand(l *logrus.Entry) *GoCmd {
-	return &GoCmd{NewCommand(l, "go")}
+	return &GoCmd{*NewCommand(l, "go")}
 }
 
 func (c GoCmd) Build(workDir, output, input string, flags ...string) *Cmd {

util/helm.go

@@ -3,11 +3,11 @@ package util
 import "github.com/sirupsen/logrus"
 
 type HelmCmd struct {
-	*Cmd
+	Cmd
 }
 
 func NewHelmCommand(l *logrus.Entry) *HelmCmd {
-	return &HelmCmd{NewCommand(l, "helm")}
+	return &HelmCmd{*NewCommand(l, "helm")}
 }
 
 func (c HelmCmd) UpdateDependency(chart, chartPath string) (string, error) {

util/kube.go

@@ -11,11 +11,11 @@ import (
 )
 
 type KubeCmd struct {
-	*Cmd
+	Cmd
 }
 
 func NewKubeCommand(l *logrus.Entry) *KubeCmd {
-	return &KubeCmd{NewCommand(l, "helm")}
+	return &KubeCmd{*NewCommand(l, "kubectl")}
 }
 
 func (c KubeCmd) RollbackDeployment(deployment string) *Cmd {