adds version and help short hand arguments (#2144)

Author: ykethan

.changeset/honest-ducks-act.md

@@ -0,0 +1,5 @@
+---
+'@aws-amplify/backend-cli': minor
+---
+
+adds shorthand argument for version and help

packages/cli/src/main_parser_factory.test.ts

@@ -17,11 +17,22 @@ void describe('main parser', { concurrency: false }, () => {
     assert.match(output, /generate\s+Generates post deployment artifacts/);
   });
 
-  void it('shows version', async () => {
+  void it('includes generate command in shorthand help output', async () => {
+    const output = await commandRunner.runCommand('-h');
+    assert.match(output, /Commands:/);
+    assert.match(output, /generate\s+Generates post deployment artifacts/);
+  });
+
+  void it('shows version for long version option', async () => {
     const output = await commandRunner.runCommand('--version');
     assert.equal(output, `${version}\n`);
   });
 
+  void it('shows version for shorthand version option', async () => {
+    const output = await commandRunner.runCommand('-v');
+    assert.equal(output, `${version}\n`);
+  });
+
   void it('prints help if command is not provided', async () => {
     await assert.rejects(
       () => commandRunner.runCommand(''),

packages/cli/src/main_parser_factory.ts

@@ -29,6 +29,8 @@ export const createMainParser = (libraryVersion: string): Argv => {
     .command(createConfigureCommand())
     .command(createInfoCommand())
     .help()
+    .alias('h', 'help')
+    .alias('v', 'version')
     .demandCommand()
     .strictCommands()
     .recommendCommands()