complete ls exercise

Author: enjoy15

implement-shell-tools/ls/ls.js

@@ -0,0 +1,44 @@
+#!/usr/bin/env node
+
+const fs = require('fs');
+const path = require('path');
+
+function listFiles(directory, options) {
+  try {
+    const files = fs.readdirSync(directory, { withFileTypes: true });
+
+    files.forEach((file) => {
+      if (!options.all && file.name.startsWith('.')) {
+        return; // Skip hidden files unless -a is specified
+      }
+      console.log(file.name);
+    });
+  } catch (err) {
+    console.error(`ls: cannot access '${directory}': No such file or directory`);
+  }
+}
+
+function main() {
+  const args = process.argv.slice(2);
+  const options = {
+    all: false,
+  };
+
+  let directories = ['.'];
+
+  args.forEach((arg) => {
+    if (arg === '-1') {
+      // -1 is the default behavior, so no action needed
+    } else if (arg === '-a') {
+      options.all = true;
+    } else {
+      directories = [arg];
+    }
+  });
+
+  directories.forEach((directory) => {
+    listFiles(directory, options);
+  });
+}
+
+main();