Rearranged the code and added CLI that installs tools locally.

src/core/extractor.ts

@@ -0,0 +1,42 @@
+import { spawnSync } from 'child_process';
+import * as path from 'path';
+import * as fs from 'fs';
+
+export async function extractAsset(filePath: string, destDir: string): Promise<void> {
+  const ext = path.extname(filePath).toLowerCase();
+  const name = path.basename(filePath).toLowerCase();
+
+  if (!fs.existsSync(destDir)) {
+    fs.mkdirSync(destDir, { recursive: true });
+  }
+
+  if (name.endsWith('.tar.gz') || name.endsWith('.tgz') || name.endsWith('.tar')) {
+    const args = ['-xf', filePath, '-C', destDir];
+    const result = spawnSync('tar', args);
+    if (result.status !== 0) {
+      throw new Error(`tar failed with status ${result.status}: ${result.stderr.toString()}`);
+    }
+  } else if (name.endsWith('.zip')) {
+    if (process.platform === 'win32') {
+      const command = `Expand-Archive -Path "${filePath}" -DestinationPath "${destDir}" -Force`;
+      const result = spawnSync('powershell', ['-Command', command]);
+      if (result.status !== 0) {
+        throw new Error(`powershell Expand-Archive failed with status ${result.status}: ${result.stderr.toString()}`);
+      }
+    } else {
+      const result = spawnSync('unzip', ['-q', filePath, '-d', destDir]);
+      if (result.status !== 0) {
+        throw new Error(`unzip failed with status ${result.status}: ${result.stderr.toString()}`);
+      }
+    }
+  } else if (name.endsWith('.7z')) {
+      const result = spawnSync('7z', ['x', filePath, `-o${destDir}`, '-y']);
+      if (result.status !== 0) {
+        throw new Error(`7z failed with status ${result.status}. Make sure 7z is installed.`);
+      }
+  } else {
+    // For other files, we just copy them to the destination directory
+    const destPath = path.join(destDir, path.basename(filePath));
+    fs.copyFileSync(filePath, destPath);
+  }
+}