#!/bin/sh

LC_ALL=C

SVNCMD=svn
if ! which -s ${SVNCMD}; then
	SVNCMD=svnlite
	if ! which -s ${SVNCMD}; then
		echo "Cannot find svn" >&2
		exit 1
	fi
fi

case $# in
1) startrev=$1 ;;
2) startrev=$1 ; endrev=$2 ;;
3) startrev=$1 ; endrev=$2 ; branch=$3 ;;
*)
	echo "usage $0 initialrev [finalrev] [branch]" >&2
	exit 1
	;;
esac

echo -n "Number of commits: "
${SVNCMD} log svn://svn.freebsd.org/ports/${branch:-head} -r${startrev}:${endrev:-HEAD} | grep -c '^r[0-9].*lines$'
echo -n "Number of committers: "
${SVNCMD} log svn://svn.freebsd.org/ports/${branch:-head} -r${startrev}:${endrev:-HEAD} | awk -F\| '/^r[0-9].*lines$/ { print $2 }' | sort -u | wc -l
echo "Most active committers:"
${SVNCMD} log svn://svn.freebsd.org/ports/${branch:-head} -r${startrev}:${endrev:-HEAD} | awk -F\| '/^r[0-9].*lines$/ { print $2 }' | sort | uniq -c | sort -rn | head -10

if which -s diffstat; then
	echo -n "Diffstat:"
	svn diff svn://svn.freebsd.org/ports/${branch:-head} -r${startrev}:${endrev:-HEAD} | tail -1
else
	echo "Cannot find diffstat skipping that statistic" >&2
fi