if [ -z "$r_me" ] || [ -z "$r_other" ]; then
return
fi
+
+ # one of the two sides of the merge should be remote upstream, or all is fine
+ r_r=`git symbolic-ref HEAD`
+ r_rem=`git config "branch.$r_rem.remote" || $ECHO origin`
+ r_bra=`git config "branch.$r_bra.merge" || $ECHO "$r_r"`
+ if [ x"$r_me" != x"`git rev-parse "$r_rem/$r_bra"`" ]; then
+ if [ x"$r_other" != x"`git rev-parse "$r_rem/$r_bra"`" ]; then
+ return
+ fi
+ fi
+
r_base=`git merge-base "$r_me" "$r_other"`
# no merge-base? upstream did filter-branch