Merge pull request #2976 from chinesepowered/fix/hook-signal-exit-code

fix(hooks): preserve null exit code from signal kills instead of collapsing to 0

Author: DennisYu07

packages/core/src/hooks/hookRunner.ts

@@ -420,15 +420,19 @@ export class HookRunner {
           }
         }
 
+        const killedBySignal = exitCode === null;
         resolve({
           hookConfig,
           eventName,
           success: exitCode === EXIT_CODE_SUCCESS,
           output,
           stdout,
           stderr,
-          exitCode: exitCode || EXIT_CODE_SUCCESS,
+          exitCode: exitCode ?? -1,
           duration,
+          ...(killedBySignal && {
+            error: new Error('Hook killed by signal'),
+          }),
         });
       });