ManifestTask: set returncode to that of failed gpg process

In order for ManifestScheduler retry to detect an unexpected
returncode, ManifestTask must expose the failed gpg process
returncode as the ManifestTask returncode.

Fixes: 448b774
Bug: https://bugs.gentoo.org/965132
Signed-off-by: Zac Medico <[email protected]>

Author: zmedico

lib/portage/package/ebuild/_parallel_manifest/ManifestTask.py

@@ -1,4 +1,4 @@
-# Copyright 2012-2018 Gentoo Foundation
+# Copyright 2012-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 import errno
@@ -73,6 +73,8 @@ def _start_with_fetchlist(self, fetchlist_task):
     def _manifest_proc_exit(self, manifest_proc):
         self._assert_current(manifest_proc)
         if manifest_proc.returncode not in (os.EX_OK, manifest_proc.MODIFIED):
+            # Expose the process returncode so that manifest_scheduler_retry
+            # can detect an unexpected process returncode (bug 965132).
             self.returncode = manifest_proc.returncode
             self._current_task = None
             self.wait()
@@ -205,6 +207,9 @@ def _start_gpg_proc(self):
 
     def _gpg_proc_exit(self, gpg_proc):
         if self._default_exit(gpg_proc) != os.EX_OK:
+            # Expose the process returncode so that manifest_scheduler_retry
+            # can detect an unexpected process returncode (bug 965132).
+            self.returncode = gpg_proc.returncode
             self.wait()
             return