Implementation of python's caching (#266)

src/utils.ts

@@ -92,3 +92,10 @@ export function validatePythonVersionFormatForPyPy(version: string) {
   const re = /^\d+\.\d+$/;
   return re.test(version);
 }
+
+export function isGhes(): boolean {
+  const ghUrl = new URL(
+    process.env['GITHUB_SERVER_URL'] || 'https://github.com'
+  );
+  return ghUrl.hostname.toUpperCase() !== 'GITHUB.COM';
+}