rpmostree-core: Reload user/groups after each %post script

TODO

See: https://fedoraproject.org/wiki/Changes/RPMSuportForSystemdSysusers

Fixes: fedora-silverblue/issue-tracker#636
Fixes: https://gitlab.com/fedora/ostree/sig/-/issues/70
Fixes: #5333

Author: travier

src/libpriv/rpmostree-core.cxx

@@ -4518,23 +4518,23 @@ rpmostree_context_assemble (RpmOstreeContext *self, GCancellable *cancellable, G
             return FALSE;
         }
 
-      if (faccessat (tmprootfs_dfd, "etc/passwd", F_OK, 0) == 0)
-        {
-          CXX_TRY (passwd_entries->add_passwd_content (tmprootfs_dfd, "etc/passwd"), error);
-        }
-
-      if (faccessat (tmprootfs_dfd, "etc/group", F_OK, 0) == 0)
-        {
-          CXX_TRY (passwd_entries->add_group_content (tmprootfs_dfd, "etc/group"), error);
-        }
-
       {
         auto task = rpmostreecxx::progress_begin_task ("Running post scripts");
         guint n_post_scripts_run = 0;
 
         /* %post */
         for (guint i = 0; i < n_rpmts_elements; i++)
           {
+            if (faccessat (tmprootfs_dfd, "etc/passwd", F_OK, 0) == 0)
+              {
+                CXX_TRY (passwd_entries->add_passwd_content (tmprootfs_dfd, "etc/passwd"), error);
+              }
+
+            if (faccessat (tmprootfs_dfd, "etc/group", F_OK, 0) == 0)
+              {
+                CXX_TRY (passwd_entries->add_group_content (tmprootfs_dfd, "etc/group"), error);
+              }
+
             rpmte te = rpmtsElement (ordering_ts, i);
             if (rpmteType (te) != TR_ADDED)
               continue;