From db42efb05ade373accd7bff38f1c78345443f8e3 Mon Sep 17 00:00:00 2001
From: Anastasia <ahinata1717@gmail.com>
Date: Thu, 19 Feb 2026 16:38:09 +0200
Subject: [PATCH 1/2] feat: implement copyFiles function

---
 src/app.js | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/src/app.js b/src/app.js
index ad9a93a..f00c546 100644
--- a/src/app.js
+++ b/src/app.js
@@ -1 +1,54 @@
+/* eslint-disable no-console */
 'use strict';
+
+const fs = require('fs/promises');
+
+async function copyFiles() {
+  const [src, dest] = process.argv.slice(2);
+
+  if (!src || !dest) {
+    console.error('Two arguments are required');
+
+    return;
+  }
+
+  if (src === dest) {
+    return;
+  }
+
+  let srcStat;
+
+  try {
+    srcStat = await fs.stat(src);
+  } catch {
+    console.error('Source file does not exist');
+
+    return;
+  }
+
+  if (!srcStat.isFile()) {
+    console.error('Source is not a file');
+
+    return;
+  }
+
+  try {
+    const destStat = await fs.stat(dest);
+
+    if (destStat.isDirectory()) {
+      console.error('Destination is a directory');
+
+      return;
+    }
+  } catch (err) {
+    if (err.code !== 'ENOENT') {
+      console.error('Error checking destination file');
+
+      return;
+    }
+  }
+
+  await fs.copyFile(src, dest);
+}
+
+copyFiles();

From 00c65ecf40597a463e00546576de8eb2b04a4690 Mon Sep 17 00:00:00 2001
From: Anastasia <ahinata1717@gmail.com>
Date: Thu, 19 Feb 2026 16:53:00 +0200
Subject: [PATCH 2/2] fix: improve function logic

---
 src/app.js | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/src/app.js b/src/app.js
index f00c546..10d13fc 100644
--- a/src/app.js
+++ b/src/app.js
@@ -2,17 +2,27 @@
 'use strict';
 
 const fs = require('fs/promises');
+const path = require('node:path');
 
 async function copyFiles() {
-  const [src, dest] = process.argv.slice(2);
+  const args = process.argv.slice(2);
+  const [src, dest] = args;
 
-  if (!src || !dest) {
+  if (!src || !dest || args.length > 2) {
     console.error('Two arguments are required');
 
     return;
   }
 
-  if (src === dest) {
+  for (const arg of args) {
+    if (arg.startsWith('-')) {
+      console.error('Arguments should not start with a dash');
+
+      return;
+    }
+  }
+
+  if (path.resolve(src) === path.resolve(dest)) {
     return;
   }
 
@@ -48,7 +58,11 @@ async function copyFiles() {
     }
   }
 
-  await fs.copyFile(src, dest);
+  try {
+    await fs.copyFile(src, dest);
+  } catch (err) {
+    console.error('Error copying file:', err.message);
+  }
 }
 
 copyFiles();