Comment on stripping only version or tag from package name arg

Author: Patrick Dillon

packages/create-react-app/index.js

@@ -152,9 +152,10 @@ function getInstallPackage(version) {
 
 // Extract package name from tarball url or path.
 function getPackageName(installPackage) {
-  if (installPackage.indexOf('.tgz') > 0) {
+  if (installPackage.indexOf('.tgz') > -1) {
     return installPackage.match(/^.+\/(.+)-.+\.tgz$/)[1];
   } else if (installPackage.indexOf('@') > 0) {
+    // Do not match @scope/ when stripping off @version or @tag
     return installPackage.charAt(0) + installPackage.substr(1).split('@')[0];
   }
   return installPackage;