Global installs dont have a local node_modules, so dont try cache the warning

Author: orta

packages/create-react-app/createReactApp.js

@@ -68,7 +68,12 @@ function writeWarningFile() {
     ourPackageInNodeModules,
     'given-deprecation-warning'
   );
-  fs.writeFileSync(warningFilePath, 'true');
+
+  if (fs.existsSync(ourPackageInNodeModules)) {
+    fs.writeFileSync(warningFilePath, 'true');
+    return true;
+  }
+  return false;
 }
 
 let projectName;
@@ -83,11 +88,14 @@ function init() {
     console.log(
       chalk.underline('https://react.dev/learn/start-a-new-react-project')
     );
-    console.log('');
-    console.log(
-      chalk.grey('This error message will only be shown once per install.')
-    );
-    writeWarningFile();
+
+    const wroteWarningFile = writeWarningFile();
+    if (wroteWarningFile) {
+      console.log('');
+      console.log(
+        chalk.grey('This error message will only be shown once per install.')
+      );
+    }
   }
 
   const program = new commander.Command(packageJson.name)