From 9ca45c160a071478426b87d72d58921baeb5fa9d Mon Sep 17 00:00:00 2001
From: Justin Santa Barbara <justin@fathomdb.com>
Date: Mon, 26 Sep 2016 23:53:18 -0400
Subject: [PATCH] channels: default to localhost if cluster config not found

---
 channels/cmd/channels/root.go            | 18 ++++++++---
 channels/pkg/channels/addons.go          | 40 +++++++++++++++++-------
 channels/pkg/channels/apply.go           |  2 +-
 channels/pkg/channels/channel_version.go |  2 +-
 cmd/kops/upgrade_cluster.go              |  1 +
 5 files changed, 46 insertions(+), 17 deletions(-)

diff --git a/channels/cmd/channels/root.go b/channels/cmd/channels/root.go
index cce1fe9aab..5943627ff4 100644
--- a/channels/cmd/channels/root.go
+++ b/channels/cmd/channels/root.go
@@ -4,6 +4,7 @@ import (
 	goflag "flag"
 	"fmt"
 
+	"github.com/golang/glog"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"k8s.io/kubernetes/pkg/client/clientset_generated/release_1_3"
@@ -63,14 +64,23 @@ func (c *RootCmd) AddCommand(cmd *cobra.Command) {
 }
 
 func (c *RootCmd) KubernetesClient() (*release_1_3.Clientset, error) {
-	config, err := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
+	config := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
 		clientcmd.NewDefaultClientConfigLoadingRules(),
-		&clientcmd.ConfigOverrides{}).ClientConfig()
+		&clientcmd.ConfigOverrides{})
+	clientConfig, err := config.ClientConfig()
 	if err != nil {
-		return nil, fmt.Errorf("cannot load kubecfg settings: %v", err)
+		if clientcmd.IsEmptyConfig(err) {
+			glog.V(2).Infof("No client config found; will use default config")
+			clientConfig, err = clientcmd.DefaultClientConfig.ClientConfig()
+			if err != nil {
+				return nil, fmt.Errorf("cannot build default kube config settings: %v", err)
+			}
+		} else {
+			return nil, fmt.Errorf("cannot load kubecfg settings: %v", err)
+		}
 	}
 
-	k8sClient, err := release_1_3.NewForConfig(config)
+	k8sClient, err := release_1_3.NewForConfig(clientConfig)
 	if err != nil {
 		return nil, fmt.Errorf("cannot build kube client: %v", err)
 	}
diff --git a/channels/pkg/channels/addons.go b/channels/pkg/channels/addons.go
index a911136533..965cf62462 100644
--- a/channels/pkg/channels/addons.go
+++ b/channels/pkg/channels/addons.go
@@ -20,6 +20,10 @@ func LoadAddons(location *url.URL) (*Addons, error) {
 		return nil, fmt.Errorf("error reading addons from %q: %v", location, err)
 	}
 
+	return ParseAddons(location, data)
+}
+
+func ParseAddons(location *url.URL, data []byte) (*Addons, error) {
 	// Yaml can't parse empty strings
 	configString := string(data)
 	configString = strings.TrimSpace(configString)
@@ -36,18 +40,13 @@ func LoadAddons(location *url.URL) (*Addons, error) {
 }
 
 func (a *Addons) GetCurrent() ([]*Addon, error) {
+	all, err := a.All()
+	if err != nil {
+		return nil, err
+	}
 	specs := make(map[string]*Addon)
-	for _, s := range a.APIObject.Spec.Addons {
-		name := a.APIObject.Name
-		if s.Name != nil {
-			name = *s.Name
-		}
-
-		addon := &Addon{
-			Channel: a.Channel,
-			Spec:    s,
-			Name:    name,
-		}
+	for _, addon := range all {
+		name := addon.Name
 		existing := specs[name]
 		if existing == nil || addon.ChannelVersion().Replaces(existing.ChannelVersion()) {
 			specs[name] = addon
@@ -60,3 +59,22 @@ func (a *Addons) GetCurrent() ([]*Addon, error) {
 	}
 	return addons, nil
 }
+
+func (a *Addons) All() ([]*Addon, error) {
+	var addons []*Addon
+	for _, s := range a.APIObject.Spec.Addons {
+		name := a.APIObject.Name
+		if s.Name != nil {
+			name = *s.Name
+		}
+
+		addon := &Addon{
+			Channel: a.Channel,
+			Spec:    s,
+			Name:    name,
+		}
+
+		addons = append(addons, addon)
+	}
+	return addons, nil
+}
diff --git a/channels/pkg/channels/apply.go b/channels/pkg/channels/apply.go
index f9c551a046..cb0324bed2 100644
--- a/channels/pkg/channels/apply.go
+++ b/channels/pkg/channels/apply.go
@@ -25,7 +25,7 @@ func execKubectl(args ...string) (string, error) {
 	glog.V(2).Infof("Running command: %s", human)
 	output, err := cmd.CombinedOutput()
 	if err != nil {
-		glog.Infof("error running %s:", human)
+		glog.Infof("error running %s", human)
 		glog.Info(string(output))
 		return string(output), fmt.Errorf("error running kubectl")
 	}
diff --git a/channels/pkg/channels/channel_version.go b/channels/pkg/channels/channel_version.go
index 6b7c6c69a4..d2ac517053 100644
--- a/channels/pkg/channels/channel_version.go
+++ b/channels/pkg/channels/channel_version.go
@@ -3,8 +3,8 @@ package channels
 import (
 	"encoding/json"
 	"fmt"
+	"github.com/blang/semver"
 	"github.com/golang/glog"
-	"github.com/kopeio/route-controller/_vendor/github.com/blang/semver"
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/v1"
 	"k8s.io/kubernetes/pkg/client/clientset_generated/release_1_3"
diff --git a/cmd/kops/upgrade_cluster.go b/cmd/kops/upgrade_cluster.go
index 39d62ef1ce..6550352438 100644
--- a/cmd/kops/upgrade_cluster.go
+++ b/cmd/kops/upgrade_cluster.go
@@ -7,6 +7,7 @@ import (
 	"k8s.io/kops/upup/pkg/api"
 	"k8s.io/kops/upup/pkg/fi/cloudup"
 	"k8s.io/kops/util/pkg/tables"
+	"k8s.io/kops/util/pkg/vfs"
 	"os"
 )