ls-implementation

Author: sarawone

implement-shell-tools/ls/ls.js

@@ -0,0 +1,37 @@
+import {program} from "commander";
+import {promises as fs} from "node:fs";
+
+program
+ .name ("ls")
+ .description("List the file directory")
+ .option("-1","List one file per line")
+ .option("-a","Include hidden file")
+ .argument("[dir]", "Directory to list",".")
+ .parse();
+
+ const options = program.opts();
+const dir = program.args[0] || ".";
+
+try {
+  const items = await fs.readdir(dir, { withFileTypes: true });
+
+  let fileNames = items.map(item => item.name);
+
+  // Filter out hidden files unless -a
+  if (!options.a) {
+    fileNames = fileNames.filter(name => !name.startsWith("."));
+  }
+
+  // Print output
+  if (options["1"]) {
+    // One file per line
+    fileNames.forEach(name => console.log(name));
+  } else {
+    // Default: space-separated (like regular `ls`)
+    console.log(fileNames.join("  "));
+  }
+} catch (err) {
+  console.error(`Error reading directory "${dir}":`, err.message);
+  process.exit(1);
+}
+