fix(graphql-codegen-cli): Don't hang when 0 CPUs are found (#10569)

* fix(graphql-codegen-cli): Don't hang when 0 CPUs are found

* Add changeset

Author: etr2460

.changeset/ready-ravens-swim.md

@@ -0,0 +1,7 @@
+---
+'@graphql-codegen/cli': patch
+---
+
+fix(graphql-codegen-cli): Don't hang when 0 CPUs are found
+
+Fixes generation when 0 CPUs are returned by os.cpus(), which occurs in sandbox environments.

packages/graphql-codegen-cli/src/codegen.ts

@@ -423,7 +423,7 @@ export async function executeCodegen(
             };
           });
 
-          return task.newListr(generateTasks, { concurrent: cpus().length });
+          return task.newListr(generateTasks, { concurrent: cpus().length || 1 });
         },
       },
     ],