Only use yarn.lock.cached if using the default Yarn registry (#6253)

facebook · Feb 18, 2019 · a8af55d · a8af55d
1 parent 09def49
commit a8af55d
Showing 1 changed file with 15 additions and 4 deletions.
diff --git a/packages/create-react-app/createReactApp.js b/packages/create-react-app/createReactApp.js
@@ -268,10 +268,21 @@ function createApp(
   }
 
   if (useYarn) {
-    fs.copySync(
-      require.resolve('./yarn.lock.cached'),
-      path.join(root, 'yarn.lock')
-    );
+    let yarnUsesDefaultRegistry = true;
+    try {
+      yarnUsesDefaultRegistry =
+        execSync('yarnpkg config get registry')
+          .toString()
+          .trim() === 'https://registry.yarnpkg.com';
+    } catch (e) {
+      // ignore
+    }
+    if (yarnUsesDefaultRegistry) {
+      fs.copySync(
+        require.resolve('./yarn.lock.cached'),
+        path.join(root, 'yarn.lock')
+      );
+    }
   }
 
   run(