die "Unable to find common commit between" $merge $head
fi
-if [ "$common" == "$merge" ]; then
+case "$common" in
+"$merge")
echo "Already up-to-date. Yeeah!"
dropheads
exit 0
-fi
-if [ "$common" == "$head" ]; then
+ ;;
+"$head")
echo "Updating from $head to $merge."
git-read-tree -u -m $head $merge || exit 1
echo $merge > "$GIT_DIR"/HEAD
git-diff-tree -p $head $merge | git-apply --stat
dropheads
exit 0
-fi
+ ;;
+esac
# Find an optimum merge base if there are more than one candidates.
LF='