Solution

src/app.js

@@ -1 +1,57 @@
 'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+function main() {
+  const args = process.argv.slice(2);
+  const sourceArg = args[0];
+  const destArg = args[1];
+
+  if (!sourceArg || !destArg) {
+    // eslint-disable-next-line no-console
+    console.error(
+      'Error: Please provide both source and destination file paths.',
+    );
+
+    return;
+  }
+
+  const sourcePath = path.resolve(sourceArg);
+  const destPath = path.resolve(destArg);
+
+  if (sourcePath === destPath) {
+    return;
+  }
+
+  if (!fs.existsSync(sourcePath)) {
+    // eslint-disable-next-line no-console
+    console.error('Error: Source file does not exist.');
+
+    return;
+  }
+
+  const sourceStats = fs.statSync(sourcePath);
+
+  if (sourceStats.isDirectory()) {
+    // eslint-disable-next-line no-console
+    console.error('Error: Source path is a directory.');
+
+    return;
+  }
+
+  if (fs.existsSync(destPath)) {
+    const destStats = fs.statSync(destPath);
+
+    if (destStats.isDirectory()) {
+      // eslint-disable-next-line no-console
+      console.error('Error: Destination path is a directory.');
+
+      return;
+    }
+  }
+
+  fs.copyFileSync(sourcePath, destPath);
+}
+
+main();