First step that lays out a basic command line UI with a simple glob for a first ls copy.

03-replicate-ls/package-lock.json

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+}

03-replicate-ls/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "03-replicate-ls",
+  "version": "1.0.0",
+  "type": "module",
+  "description": "",
+  "main": "step1.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "BSD",
+  "dependencies": {
+    "fast-glob": "^3.2.11"
+  }
+}

03-replicate-ls/step1.js

@@ -0,0 +1,21 @@
+import path from "path";
+import glob from "fast-glob";
+import { program } from "commander";
+
+program
+  .option("-l");
+
+program.parse();
+
+const options = program.opts();
+
+
+console.log(options);
+
+if(program.args.length > 0) {
+  const results = glob.sync(program.args[0]);
+
+  for(let result of results) {
+    console.log(result);
+  }
+}