+diff_tree_flags=$(git-rev-parse --sq --no-revs --flags "$@") || exit
+case "$0" in
+*whatchanged)
+ count=
+ test -z "$diff_tree_flags" &&
+ diff_tree_flags=$(git-repo-config --get whatchanged.difftree)
+ diff_tree_default_flags='-c -M --abbrev' ;;
+*show)
+ count=-n1
+ test -z "$diff_tree_flags" &&
+ diff_tree_flags=$(git-repo-config --get show.difftree)
+ diff_tree_default_flags='--cc --always' ;;
+esac