ls implementation exercise

Author: Priscilla-EM

implement-shell-tools/ls/myls.js

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+import { program } from "commander";
+import { promises as fs } from "node:fs";
+import process from "node:process";
+
+program
+  .name("myls")
+  .description("list file(s) in the directory, like the ls command")
+  .option("-1", "list one file per line")
+  .option("-a", "include hidden files")
+  .argument("[directory]", "Directory to list", ".");
+
+program.parse();
+
+const options = program.opts();
+const directory = program.args[0] || ".";
+
+try {
+  let files = await fs.readdir(directory);
+
+  // if "-a" is used, include hidden files; those that start with "." 
+  if (options.a) {
+    files = [".", "..", ...files];
+  }
+
+  for (const file of files) {
+    // if "-a" is not used, skip hidden files; those that start with "."
+    if (!options.a && file.startsWith(".")) {
+      continue;
+    }
+
+    console.log(file); // print file name; one file per line
+  }
+} catch (error) {
+  console.error(`Error reading directory ${directory}:`, error.message);
+  process.exit(1);
+}

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

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+{
+  "name": "ls",
+  "version": "1.0.0",
+  "description": "You should already be familiar with the `ls` command line tool.",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "commander": "^14.0.0"
+  }
+}