Implement ls with -1 flag and directory argument support

Author: zohrehKazemianpour

implement-shell-tools/ls/ls.js

@@ -0,0 +1,28 @@
+import { program } from "commander";
+import { promises as fs } from "node:fs";
+
+//config the program
+program
+  .name("ls")
+  .description("list directory contents")
+  .option("-1, --one", "Force output to be one entry per line")
+  .argument("[directory]", "Directory to list", "."); // "." means current directory
+
+//interpret the program
+program.parse();
+
+// Get the directory argument (first argument in program.args array)
+// If no argument provided, default to current directory "."
+const directory = program.args[0] || ".";
+
+//read the directory to get array of filenames
+const files = await fs.readdir(directory);
+
+
+
+//print each file on its own line
+// Note: console.log(files) would print the entire array like: ['file1', 'file2']
+// Loop prints each individually on separate lines
+for (const file of files) {
+    console.log(file)
+}