feat: Adds default impl of the symbol of CommandRepresentable.

Author: devedbox

Commander.xcodeproj/xcshareddata/xcschemes/commander-sample.xcscheme

@@ -77,6 +77,10 @@
          </CommandLineArgument>
          <CommandLineArgument
             argument = "sample  -h"
+            isEnabled = "NO">
+         </CommandLineArgument>
+         <CommandLineArgument
+            argument = "help"
             isEnabled = "YES">
          </CommandLineArgument>
          <CommandLineArgument

Sources/Commander/Commands/CommandRepresentable.swift

@@ -122,6 +122,10 @@ public protocol CommandDispatchable: CommandDescribable {
 // MARK: - CommandDescribable.
 
 extension CommandDispatchable {
+  /// The command symbol also name of the command.
+  public static var symbol: String {
+    return String(reflecting: self).split(delimiter: ".").last?.camelcase2dashcase().replacingOccurrences(of: "-command", with: "") ?? ""
+  }
   /// Returns the children of the insrance of `CommandDescribable`.
   public static var children: [CommandDescribable.Type] {
     return self.children as [CommandDispatchable.Type]

Sources/commander-sample/SampleCommand.swift

@@ -50,10 +50,10 @@ public struct SampleCommand: CommandRepresentable {
     }
   }
 
-  public static let children: [CommandDispatchable.Type] = [
+  public static let children = [
     NoArgsCommand.self
   ]
-  public static let symbol: String = "sample"
+
   public static let usage: String = "Show sample usage of commander"
 
   public static func main(_ options: Options) throws {
@@ -70,7 +70,6 @@ public struct NoArgsCommand: CommandRepresentable {
     public init() { }
   }
 
-  @Option(usage: "set-args")
   public static var symbol: String = "set-args"
   public static let usage: String = "Set arguments of the command with given arguments"