fleetctl: Need return fail if no args given to some subcommand.

fleetctl/destroy.go

@@ -29,6 +29,10 @@ Destroyed units are impossible to start unless re-submitted.`,
 }
 
 func runDestroyUnits(args []string) (exit int) {
+	if len(args) == 0 {
+		stderr("One unit file must be provided.")
+		return 1
+	}
 	for _, v := range args {
 		name := unitNameMangle(v)
 		err := cAPI.DestroyUnit(name)

fleetctl/load.go

@@ -46,6 +46,10 @@ func init() {
 }
 
 func runLoadUnits(args []string) (exit int) {
+	if len(args) == 0 {
+		stderr("One unit file must be provided.")
+		return 1
+	}
 	if err := lazyCreateUnits(args); err != nil {
 		stderr("Error creating units: %v", err)
 		return 1

fleetctl/start.go

@@ -54,6 +54,10 @@ func init() {
 }
 
 func runStartUnit(args []string) (exit int) {
+	if len(args) == 0 {
+		stderr("One unit file must be provided.")
+		return 1
+	}
 	if err := lazyCreateUnits(args); err != nil {
 		stderr("Error creating units: %v", err)
 		return 1

fleetctl/status.go

@@ -44,6 +44,10 @@ func init() {
 }
 
 func runStatusUnits(args []string) (exit int) {
+	if len(args) == 0 {
+		stderr("One unit file must be provided.")
+		return 1
+	}
 	units, err := cAPI.Units()
 	if err != nil {
 		stderr("Error retrieving unit: %v", err)

fleetctl/stop.go

@@ -52,12 +52,22 @@ func init() {
 }
 
 func runStopUnit(args []string) (exit int) {
+	if len(args) == 0 {
+		stderr("One unit file must be provided.")
+		return 1
+	}
+
 	units, err := findUnits(args)
 	if err != nil {
 		stderr("%v", err)
 		return 1
 	}
 
+	if len(units) == 0 {
+		stderr("The units to be stopped are not found in registry.")
+		return 1
+	}
+
 	stopping := make([]string, 0)
 	for _, u := range units {
 		if !suToGlobal(u) {

fleetctl/submit.go

@@ -36,6 +36,10 @@ func init() {
 }
 
 func runSubmitUnits(args []string) (exit int) {
+	if len(args) == 0 {
+		stderr("One unit file must be provided.")
+		return 1
+	}
 	if err := lazyCreateUnits(args); err != nil {
 		stderr("Error creating units: %v", err)
 		exit = 1

fleetctl/unload.go

@@ -36,6 +36,10 @@ func init() {
 }
 
 func runUnloadUnit(args []string) (exit int) {
+	if len(args) == 0 {
+		stderr("One unit file must be provided.")
+		return 1
+	}
 	units, err := findUnits(args)
 	if err != nil {
 		stderr("%v", err)