Align version outputs

cmd/testdata/TestVersionGoldenOutput/version.golden

@@ -1,5 +1,2 @@
-airshipadm: v0.1.0
-golang    : go1.12
-kubernetes: v0.0.0-master+$Format:%h$
-helm      : TODO
-argo      : TODO
+client:            v0.1.0
+kubernetes server: v0.0.0-master+$Format:%h$

cmd/version.go

@@ -3,20 +3,17 @@ package cmd
 import (
 	"fmt"
 	"io"
-	"runtime"
+	"text/tabwriter"
 
 	"github.com/spf13/cobra"
 
 	kube "github.com/ian-howell/airshipadm/pkg/kube"
 )
 
-const versionLong = `Show the versions for the airshipadm tool and the supporting tools.
-This includes the following tools, in order:
-  * airshipadm
-  * golang
-  * kubernetes
-  * helm
-  * argo
+const versionLong = `Show the versions for the airshipadm tool and its components.
+This includes the following components, in order:
+  * airshipadm client
+  * kubernetes cluster
 `
 
 // NewVersionCommand prints out the versions of airshipadm and its underlying tools
@@ -26,17 +23,16 @@ func NewVersionCommand(out io.Writer, client *kube.Client) *cobra.Command {
 		Short: "Show the version number of airshipadm and its underlying tools",
 		Long:  versionLong,
 		Run: func(cmd *cobra.Command, args []string) {
-			fmt.Fprintf(out, "%-10s: %s\n", "airshipadm", airshipadmVersion())
-			fmt.Fprintf(out, "%-10s: %s\n", "golang", runtime.Version())
-			fmt.Fprintf(out, "%-10s: %s\n", "kubernetes", kubeVersion(client))
-			fmt.Fprintf(out, "%-10s: %s\n", "helm", helmVersion())
-			fmt.Fprintf(out, "%-10s: %s\n", "argo", argoVersion())
+			w := tabwriter.NewWriter(out, 0, 0, 1, ' ', 0)
+			fmt.Fprintf(w, "%s:\t%s\n", "client", clientVersion())
+			fmt.Fprintf(w, "%s:\t%s\n", "kubernetes server", kubeVersion(client))
+			w.Flush()
 		},
 	}
 	return versionCmd
 }
 
-func airshipadmVersion() string {
+func clientVersion() string {
 	// TODO(howell): There's gotta be a smarter way to do this
 	return "v0.1.0"
 }
@@ -49,13 +45,3 @@ func kubeVersion(client *kube.Client) string {
 	}
 	return version.String()
 }
-
-func helmVersion() string {
-	// TODO(howell): Implement this
-	return "TODO"
-}
-
-func argoVersion() string {
-	// TODO(howell): Implement this
-	return "TODO"
-}