Add option to specify in usage alias command name (#1482)

* Add option to specify in usage alias command name

* add test

Author: attiasas

plugins/components/conversionlayer.go

@@ -133,7 +133,11 @@ func createCommandUsages(cmd Command, convertedStringFlags map[string]StringFlag
 }
 
 func getCmdUsageString(cmd Command, namespaces ...string) string {
-	return strings.Join(append(removeEmptyValues(namespaces), cmd.Name), " ")
+	name := cmd.Name
+	if cmd.UsageOptions != nil && cmd.UsageOptions.CommandName != "" {
+		name = cmd.UsageOptions.CommandName
+	}
+	return strings.Join(append(removeEmptyValues(namespaces), name), " ")
 }
 
 // Generated usages are based on the command's flags and arguments:

plugins/components/conversionlayer_test.go

@@ -103,6 +103,17 @@ func TestCreateCommandUsages(t *testing.T) {
 			stringFlags: map[string]StringFlag{optStrFlag.Name: optStrFlag, strFlag.Name: strFlag},
 			expected:    override, // override is not expected to be changed upon using UsageOptions
 		},
+		{
+			name: "with custom command name",
+			cmd: Command{
+				Name:         cmdName,
+				Arguments:    []Argument{{Name: "first argument"}},
+				UsageOptions: &UsageOptions{CommandName: "custom-command"},
+			},
+			expected: []string{
+				fmt.Sprintf("%s custom-command <%s>", appNameSpace, "first argument"),
+			},
+		},
 	}
 
 	for _, test := range tests {

plugins/components/structure.go

@@ -52,6 +52,8 @@ type Command struct {
 }
 
 type UsageOptions struct {
+	// Command name to be used in the usage instead of the actual command name.
+	CommandName string
 	// Special cases, each of these will be created as command usage option and the value appended as suffix for the command name.
 	Usage []string
 	// If true then the given usages will replace the auto generated usage. Otherwise the given usages will be appended to the auto generated usage.