+ my $splitbrain_cachekey;
+
+ if ($do_split_brain) {
+ my $cachehit;
+ ($cachehit, $splitbrain_cachekey) =
+ quilt_check_splitbrain_cache($headref, $upstreamversion);
+ if ($cachehit) {
+ changedir $maindir;
+ return;
+ }
+ }
+
+ unpack_playtree_need_cd_work($headref);
+ if ($do_split_brain) {
+ runcmd @git, qw(checkout -q -b dgit-view);
+ # so long as work is not deleted, its current branch will
+ # remain dgit-view, rather than master, so subsequent calls to
+ # unpack_playtree_need_cd_work
+ # will DTRT, resetting dgit-view.
+ confess if $made_split_brain;
+ $made_split_brain = 1;
+ }
+ chdir '..';