feat: allow for a sub command to be the default

test: test default sub commands

Author: jmcdo29

.changeset/dry-months-return.md

@@ -0,0 +1,5 @@
+---
+'nest-commander': minor
+---
+
+Allow for a sub command to be set as the default sub command.

integration/default-sub-commands/test/default-sub-commands.spec.ts

@@ -0,0 +1,43 @@
+import { TestingModule } from '@nestjs/testing';
+import { Stub, stubMethod } from 'hanbi';
+import { CommandTestFactory } from 'nest-commander-testing';
+import { suite } from 'uvu';
+import { equal } from 'uvu/assert';
+import { LogService } from '../../common/log.service';
+import { NestedModule } from '../src/nested.module';
+
+export const DefaultSubCommandSuite = suite<{
+  logMock: Stub<typeof console.log>;
+  exitMock: Stub<typeof process.exit>;
+  commandInstance: TestingModule;
+}>('Default Sub Command Suite');
+DefaultSubCommandSuite.before(async (context) => {
+  context.exitMock = stubMethod(process, 'exit');
+  context.logMock = stubMethod(console, 'log');
+  context.commandInstance = await CommandTestFactory.createTestingCommand({
+    imports: [NestedModule],
+  })
+    .overrideProvider(LogService)
+    .useValue({
+      log: context.logMock.handler,
+    })
+    .compile();
+});
+DefaultSubCommandSuite.after.each(({ logMock, exitMock }) => {
+  logMock.reset();
+  exitMock.reset();
+});
+DefaultSubCommandSuite.after(({ exitMock }) => {
+  exitMock.restore();
+});
+DefaultSubCommandSuite('top should call top mid1 bottom', async ({ commandInstance, logMock }) => {
+  await CommandTestFactory.run(commandInstance, ['top']);
+  equal(logMock.firstCall?.args[0], `top mid-1 bottom command`);
+});
+DefaultSubCommandSuite(
+  'top mid-2 should call top mid2 command',
+  async ({ commandInstance, logMock }) => {
+    await CommandTestFactory.run(commandInstance, ['top', 'mid-2']);
+    equal(logMock.firstCall?.args[0], `top mid-2 command`);
+  },
+);

packages/nest-commander/src/command-runner.service.ts

@@ -45,9 +45,6 @@ ${cliPluginError(this.options.cliName ?? 'nest-commander', this.options.pluginsA
     if (this.options.errorHandler) {
       this.commander.exitOverride(this.options.errorHandler);
     }
-    if (this.options.enablePositionalOptions) {
-      this.commander.enablePositionalOptions();
-    }
   }
 
   private async populateCommandMapInstances(