fix: trim leading spaces in a command name

src/command/commands/basic/command.ts

@@ -16,7 +16,7 @@ import { GetCommandNameFromDesc } from "./type-command-name";
 // dprint-ignore
 export const command = <const TCommandDesc extends readonly string[] | string, TArgv extends EmptyRecord>(
   // XXX the line above requires typescript ^5.0
-  commandDesc: TCommandDesc,
+  commandDesc:  TCommandDesc,
   description: string,
   // XXX try to avoid using `as` here
   builder: YargsCommandBuilder<TArgv> = (yargs) => yargs as y.Argv<TArgv>

src/command/commands/basic/helpers.ts

@@ -4,6 +4,7 @@
  * @returns the command name
  */
 export const getCommandNameFromDesc = (desc: string): string => {
+  desc = desc.trimStart();
   return desc.includes(" ")
     ? desc.split(" ")[0]
     : desc;

src/command/commands/basic/type-command-name.ts

@@ -1,8 +1,12 @@
+type StripSpaces<T extends string> = T extends ` ${infer U}` ? StripSpaces<U>
+  : T;
+
 /**
  * @description
  */
 export type GetCommandNameString<TCommandDesc extends string> =
-  TCommandDesc extends `${infer TCommandName} ${string}` ? TCommandName
+  StripSpaces<TCommandDesc> extends `${infer TCommandName} ${string}`
+    ? TCommandName
     : TCommandDesc;
 
 /**

test/builder/test-spaces-in-command-names.ts

@@ -0,0 +1,18 @@
+import { buildAndParseUnsafeR, comm, subs } from "../../src";
+
+describe("builder trims leading spaces", () => {
+  test("basic command", () => {
+    const cmd1 = comm("   a ", "cmd", _ => _);
+    expectTypeOf(cmd1.commandName).toEqualTypeOf<"a">();
+    expect(cmd1.commandName).toBe("a");
+  });
+
+  test("subs command", () => {
+    const cmd1 = subs("   a ", "cmd", [
+      comm("b", "cmd", _ => _),
+    ]);
+
+    expectTypeOf(cmd1.command.commandName).toEqualTypeOf<"a">();
+    expect(cmd1.command.commandName).toBe("a");
+  });
+});