chore(ci): stop CI from push generated code when no up to date (#421)

Author: millotp

scripts/ci/codegen/pushGeneratedCode.ts

@@ -8,6 +8,11 @@ import text from './text';
 const PR_NUMBER = parseInt(process.env.PR_NUMBER || '0', 10);
 const FOLDERS_TO_CHECK = 'yarn.lock openapitools.json clients specs/bundled';
 
+async function isUpToDate(): Promise<boolean> {
+  await run('git fetch origin');
+  return (await run('git status')).includes('Your branch is up to date with');
+}
+
 /**
  * Push generated code for the current `JOB` and `CLIENT` on a `generated/` branch.
  */
@@ -50,6 +55,13 @@ export async function pushGeneratedCode(): Promise<void> {
     await run(`git checkout -b ${branchToPush}`);
   }
 
+  if (!(await isUpToDate())) {
+    console.log(
+      `The branch ${branchToPush} is not up to date with ${baseBranch}, stopping this task and letting the new job push generated code.`
+    );
+    return;
+  }
+
   const commitMessage = await run(`git show -s ${baseBranch} --format="${
     text.commitStartMessage
   } %H. ${isMainBranch ? '[skip ci]' : ''}