feat(dm-delete): add dm-delete command

cmd/helm/dm.go

@@ -11,15 +11,8 @@ import (
 var ErrAlreadyInstalled error = errors.New("Already Installed")
 
 func install(dryRun bool) error {
-	var runner kubectl.Runner
+	runner := getKubectlRunner(dryRun)
-	if dryRun {
+
-		runner = &kubectl.PrintRunner{}
-	} else {
-		runner = &kubectl.RealRunner{}
-		if dm.IsInstalled(runner) {
-			return ErrAlreadyInstalled
-		}
-	}
 	out, err := dm.Install(runner)
 	if err != nil {
 		format.Error("Error installing: %s %s", out, err)
@@ -27,3 +20,21 @@ func install(dryRun bool) error {
 	format.Msg(out)
 	return nil
 }
+
+func uninstall(dryRun bool) error {
+	runner := getKubectlRunner(dryRun)
+
+	out, err := dm.Uninstall(runner)
+	if err != nil {
+		format.Error("Error uninstalling: %s %s", out, err)
+	}
+	format.Msg(out)
+	return nil
+}
+
+func getKubectlRunner(dryRun bool) kubectl.Runner {
+	if dryRun {
+		return &kubectl.PrintRunner{}
+	}
+	return &kubectl.RealRunner{}
+}

cmd/helm/helm.go

@@ -32,6 +32,71 @@ func main() {
 
 func commands() []cli.Command {
 	return []cli.Command{
+		{
+			Name:  "dm",
+			Usage: "Manage DM on Kubernetes",
+			Subcommands: []cli.Command{
+				{
+					Name:        "install",
+					Usage:       "Install DM on Kubernetes.",
+					Description: ``,
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "dry-run",
+							Usage: "Show what would be installed, but don't install anything.",
+						},
+					},
+					Action: func(c *cli.Context) {
+						if err := install(c.Bool("dry-run")); err != nil {
+							format.Error("%s (Run 'helm doctor' for more information)", err)
+							os.Exit(1)
+						}
+					},
+				},
+				{
+					Name:        "uninstall",
+					Usage:       "Uninstall the DM from Kubernetes.",
+					Description: ``,
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "dry-run",
+							Usage: "Show what would be installed, but don't install anything.",
+						},
+					},
+					Action: func(c *cli.Context) {
+						if err := uninstall(c.Bool("dry-run")); err != nil {
+							format.Error("%s (Run 'helm doctor' for more information)", err)
+							os.Exit(1)
+						}
+					},
+				},
+				{
+					Name:  "status",
+					Usage: "Show status of DM.",
+					Action: func(c *cli.Context) {
+						format.Error("Not yet implemented")
+						os.Exit(1)
+					},
+				},
+				{
+					Name:      "target",
+					Usage:     "Displays information about cluster.",
+					ArgsUsage: "",
+					Action: func(c *cli.Context) {
+						if err := target(c.Bool("dry-run")); err != nil {
+							format.Error("%s (Is the cluster running?)", err)
+							os.Exit(1)
+						}
+					},
+					Flags: []cli.Flag{
+						cli.BoolFlag{
+							Name:  "dry-run",
+							Usage: "Only display the underlying kubectl commands.",
+						},
+					},
+				},
+			},
+		},
 		{
 			Name:        "init",
 			Usage:       "Initialize the client and install DM on Kubernetes.",
@@ -49,23 +114,6 @@ func commands() []cli.Command {
 				}
 			},
 		},
-		{
-			Name:      "target",
-			Usage:     "Displays information about cluster.",
-			ArgsUsage: "",
-			Action: func(c *cli.Context) {
-				if err := target(c.Bool("dry-run")); err != nil {
-					format.Error("%s (Is the cluster running?)", err)
-					os.Exit(1)
-				}
-			},
-			Flags: []cli.Flag{
-				cli.BoolFlag{
-					Name:  "dry-run",
-					Usage: "Only display the underlying kubectl commands.",
-				},
-			},
-		},
 		{
 			Name:      "doctor",
 			Usage:     "Run a series of checks for necessary prerequisites.",

dm/uninstall.go

@@ -0,0 +1,14 @@
+package dm
+
+import (
+	"github.com/deis/helm-dm/kubectl"
+)
+
+// uninstall uses kubectl to uninstall the base DM.
+//
+// Returns the string output received from the operation, and an error if the
+// command failed.
+func Uninstall(runner kubectl.Runner) (string, error) {
+	o, err := runner.Delete("dm", "Namespace", "dm")
+	return string(o), err
+}