ls - implement-shell-tools

Author: delmorallopez

implement-shell-tools/ls/package-lock.json

@@ -0,0 +1,16 @@
+{
+  "name": "ls",
+  "version": "1.0.0",
+  "description": "You should already be familiar with the `ls` command line tool.",
+  "main": "script-01.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "comander": "^0.0.1-security",
+    "commander": "^14.0.2"
+  }
+}

implement-shell-tools/ls/package.json

@@ -0,0 +1,40 @@
+#!/usr/bin/env node
+import { program } from "commander";
+import fs from "fs";
+import path from "path";
+
+// Define CLI
+program
+  .name("ls-clone")
+  .description("A simple implementation of ls")
+  .option("-1", "list one file per line")
+  .option("-a", "include hidden files")
+  .argument("[dirs...]", "directories to list", "."); // default is current dir
+
+program.parse();
+
+const options = program.opts();
+const dirs = program.args.length ? program.args : ["."];
+const onePerLine = options["1"];
+const showAll = options.a;
+
+for (const dir of dirs) {
+  let files;
+  try {
+    files = fs.readdirSync(dir);
+  } catch (err) {
+    console.error(`ls-clone: cannot access '${dir}': No such file or directory`);
+    continue;
+  }
+
+  if (!showAll) {
+    files = files.filter(name => !name.startsWith("."));
+  }
+
+  // Output
+  if (onePerLine) {
+    files.forEach(f => console.log(f));
+  } else {
+    console.log(files.join("  "));
+  }
+}