refactor: remove unused usage functions and migrate argument parsing to commander.js

src/create-pca.ts

@@ -6,7 +6,7 @@ import os from "node:os";
 import path from "node:path";
 import readline from "node:readline";
 import { spawnSync } from "node:child_process";
-import { parseArgs } from "node:util";
+import { Command } from "commander";
 
 type RunAzResult = {
   status: number;
@@ -40,50 +40,17 @@ function runAz(args: string[], quiet = false, allowFailure = false): RunAzResult
 }
 
 async function main(): Promise<void> {
-  const usageText = `Usage: ${path.basename(process.argv[1])} [options] <app-name>
-Options:
-  -c, --config <path>    Write JSON config to file (optional)
-  -h, --help             Show this help message and exit`;
+  const program = new Command(path.basename(process.argv[1]));
+  program
+    .description("Create or update public client app and print config template")
+    .argument("<app-name>", "Application name")
+    .option("-c, --config <path>", "Write JSON config to file (optional)")
+    .allowExcessArguments(false)
+    .parse(process.argv);
 
-  let values: Record<string, string | boolean | undefined>;
-  let positionals: string[];
-  try {
-    ({ values, positionals } = parseArgs({
-      args: process.argv.slice(2),
-      options: {
-        help: { type: "boolean", short: "h" },
-        config: { type: "string", short: "c" },
-      },
-      strict: true,
-      allowPositionals: true,
-    }));
-  } catch (err) {
-    console.error(`Error: ${(err as Error).message}`);
-    console.error(usageText);
-    process.exit(1);
-  }
-
-  if (values.help) {
-    console.log(usageText);
-    process.exit(0);
-  }
-
-  if (positionals.length > 1) {
-    console.error(
-      "Error: Too many positional arguments. Only one app name positional argument is allowed.",
-    );
-    console.error(usageText);
-    process.exit(1);
-  }
-
-  const appName = positionals[0] || "";
-  const configPath = typeof values.config === "string" ? values.config : "";
-
-  if (!appName) {
-    console.error("Error: Application name is required.");
-    console.error(usageText);
-    process.exit(1);
-  }
+  const appName = program.args[0] as string;
+  const options = program.opts<{ config?: string }>();
+  const configPath = options.config ?? "";
 
   let appId = runAz([
     "ad",