message when we change kubectl context

fixing kubectl config path when set to multiple paths

upup/pkg/kutil/kubecfg_builder.go

@@ -48,18 +48,18 @@ type KubeconfigBuilder struct {
 	ClientKey  []byte
 }
 
+const KUBE_CFG_ENV = clientcmd.RecommendedConfigPathEnvVar + "=%s"
+
+// Create new KubeconfigBuilder
 func NewKubeconfigBuilder() *KubeconfigBuilder {
 	c := &KubeconfigBuilder{}
 	c.KubectlPath = "kubectl" // default to in-path
-
+	kubeConfig := os.Getenv(clientcmd.RecommendedConfigPathEnvVar)
-	kubeconfig := os.Getenv(clientcmd.RecommendedConfigPathEnvVar)
+	c.KubeconfigPath = c.getKubectlPath(kubeConfig)
-	if kubeconfig == "" {
-		kubeconfig = clientcmd.RecommendedHomeFile
-	}
-	c.KubeconfigPath = kubeconfig
 	return c
 }
 
+// Create new Rest Client
 func (c *KubeconfigBuilder) BuildRestConfig() (*restclient.Config, error) {
 	restConfig := &restclient.Config{
 		Host: "https://" + c.KubeMasterIP,
@@ -79,6 +79,7 @@ func (c *KubeconfigBuilder) BuildRestConfig() (*restclient.Config, error) {
 	return restConfig, nil
 }
 
+// Write out a new kubeconfig
 func (c *KubeconfigBuilder) WriteKubecfg() error {
 	tmpdir, err := ioutil.TempDir("", "k8s")
 	if err != nil {
@@ -183,20 +184,31 @@ func (c *KubeconfigBuilder) WriteKubecfg() error {
 			return err
 		}
 	}
-
+	fmt.Printf("Wrote config for %s to %q\n", c.Context, c.KubeconfigPath)
-	split := strings.Split(c.KubeconfigPath, ":")
+	fmt.Printf("Kop has changed your kubectl context to %s\n", c.Context)
-	path := c.KubeconfigPath
-	if len(split) > 1 {
-		path = split[0]
-	}
-	fmt.Printf("Wrote config for %s to %q\n", c.Context, path)
 	return nil
 }
 
+// get the correct path.  Handle empty and multiple values.
+func (c *KubeconfigBuilder) getKubectlPath(kubeConfig string) string {
+
+	if kubeConfig == "" {
+		return clientcmd.RecommendedHomeFile
+	}
+
+	split := strings.Split(kubeConfig, ":")
+	if len(split) > 1 {
+		return split[0]
+	}
+
+	return kubeConfig
+}
+
+
 func (c *KubeconfigBuilder) execKubectl(args ...string) error {
 	cmd := exec.Command(c.KubectlPath, args...)
 	env := os.Environ()
-	env = append(env, fmt.Sprintf("KUBECONFIG=%s", c.KubeconfigPath))
+	env = append(env, fmt.Sprintf(KUBE_CFG_ENV, c.KubeconfigPath))
 	cmd.Env = env
 
 	glog.V(2).Infof("Running command: %s", strings.Join(cmd.Args, " "))

upup/pkg/kutil/kubecfg_builder_test.go

@@ -0,0 +1,73 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package kutil
+
+import (
+	"path"
+	"testing"
+
+	"k8s.io/kubernetes/pkg/util/homedir"
+)
+
+const (
+	RecommendedHomeDir  = ".kube"
+	RecommendedFileName = "config"
+)
+
+func TestGetKubectlMultiplePath(t *testing.T) {
+	c := testCreateKubectlBuilder()
+	path := c.getKubectlPath(c.KubeconfigPath)
+
+	if path != "/tmp/config" {
+		t.Fatalf("Wrong path got: %s, but expected /tmp/config", path)
+	}
+}
+
+func TestGetKubectlSinglePath(t *testing.T) {
+	c := testCreateKubectlBuilder()
+	c.KubeconfigPath = "/bar/config"
+	path := c.getKubectlPath(c.KubeconfigPath)
+
+	if path != "/bar/config" {
+		t.Fatalf("Wrong path got: %s, but expected /bar/config", path)
+	}
+}
+
+func TestGetKubectlDefault(t *testing.T) {
+	c := testCreateKubectlBuilder()
+	c.KubeconfigPath = "/bar/config"
+	recommendedHomeFile := path.Join(homedir.HomeDir(), RecommendedHomeDir, RecommendedFileName)
+	path := c.getKubectlPath("")
+
+	if path != recommendedHomeFile {
+		t.Fatalf("Wrong path got: %s, but expected /bar/config", path)
+	}
+}
+
+func testCreateKubectlBuilder() *KubeconfigBuilder {
+	return &KubeconfigBuilder{
+		KubectlPath:     "/usr/local/bin/kubectl",
+		KubeconfigPath:  "/tmp/config:/config:path2:path3",
+		KubeMasterIP:    "127.0.0.1",
+		Context:         "my-context",
+		Namespace:       "default",
+		KubeBearerToken: "token",
+		KubeUser:        "user",
+		KubePassword:    "password",
+	}
+
+}