+proc external_blame {parent_idx} {
+ global flist_menu_file
+ global nullid nullid2
+ global parentlist selectedline currentid
+
+ if {$parent_idx > 0} {
+ set base_commit [lindex $parentlist $selectedline [expr {$parent_idx-1}]]
+ } else {
+ set base_commit $currentid
+ }
+
+ if {$base_commit eq {} || $base_commit eq $nullid || $base_commit eq $nullid2} {
+ error_popup [mc "No such commit"]
+ return
+ }
+
+ if {[catch {exec git gui blame $base_commit $flist_menu_file &} err]} {
+ error_popup [mc "git gui blame: command failed: $err"]
+ }
+}
+