+
+USAGE='[-p] [--max-count=<n>] [<since>..<limit>] [--pretty=<format>] [-m] [git-diff-tree options] [git-rev-list options]'
+SUBDIRECTORY_OK='Yes'
+. git-sh-setup
+
+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=$(git-repo-config --get show.difftree)
+ diff_tree_default_flags='--cc --always' ;;
+esac
+test -z "$diff_tree_flags" &&
+ diff_tree_flags="$diff_tree_default_flags"
+