#!/bin/sh

setglobal USAGE = ''[-p] [--max-count=<n>] [<since>..<limit>] [--pretty=<format>] [-m] [git-diff-tree options] [git-rev-list options]''
setglobal SUBDIRECTORY_OK = ''Yes''
source git-sh-setup

setglobal diff_tree_flags = $[git-rev-parse --sq --no-revs --flags @Argv] || exit
match $0 {
with *whatchanged
	setglobal count = ''
	test -z $diff_tree_flags &&
		setglobal diff_tree_flags = $[git config --get whatchanged.difftree]
	setglobal diff_tree_default_flags = ''-c -M --abbrev'' 
with *show
	setglobal count = '-n1'
	test -z $diff_tree_flags &&
		setglobal diff_tree_flags = $[git config --get show.difftree]
	setglobal diff_tree_default_flags = ''--cc --always'' 
}
test -z $diff_tree_flags &&
	setglobal diff_tree_flags = $diff_tree_default_flags

setglobal rev_list_args = $[git-rev-parse --sq --default HEAD --revs-only @Argv] &&
setglobal diff_tree_args = $[git-rev-parse --sq --no-revs --no-flags @Argv] &&

eval "git-rev-list $count $rev_list_args" |
eval "git-diff-tree --stdin --pretty -r $diff_tree_flags $diff_tree_args" |
env LESS="$LESS -S" $(PAGER:-less)