Implementation of ls with -a -1 options

Author: i786m

implement-shell-tools/ls/ls.mjs

@@ -0,0 +1,35 @@
+import { program } from 'commander';
+import process from 'node:process';
+import { promises as fs } from 'node:fs';
+
+program
+    .name('ls')
+    .description('Lists the contents of a directory.')
+    .argument('[path]', 'The path to the directory to list, defaults to the current directory')
+    .option('-a, --all', 'Do not ignore entries starting with .')
+    .option('-1', 'List one file per line');
+
+program.parse();
+
+const argv = program.args;
+const path = argv[0] || '.';
+
+let showAll = program.opts().all || false;
+let onePerLine = program.opts()['1'] || false;
+
+try {
+    const files = await fs.readdir(path);
+    files.sort((a, b) => a.localeCompare(b, undefined, { numeric: true, sensitivity: 'base' }));
+    for (const file of files) {
+        if (showAll || !file.startsWith('.')) {
+            if (onePerLine) {
+                process.stdout.write(`${file}\n`);
+            } else {
+                process.stdout.write(`${file} `);
+            }
+        }
+    }
+} catch (err) {
+    process.stderr.write(`cannot access '${path}': No such file or directory\n`);
+    process.exit(1);
+}

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

@@ -0,0 +1,15 @@
+{
+  "name": "ls",
+  "version": "1.0.0",
+  "description": "You should already be familiar with the `ls` command line tool.",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "commander": "^14.0.3"
+  }
+}