#!/bin/sh

tmp=.git/summary-$$
trap 'rm -f $tmp-*' 0

since="$1"
until="$2"

git-rev-list --no-merges "master@{$1}..master@{$2}" >"$tmp-0.txt"
top="master@{$until}"
bottom="master@{$since}"

num_patches=$(git rev-list --no-merges $bottom..$top | wc -l)
git shortlog -s -n --no-merges $bottom..$top >"$tmp-0.txt"
num_contrib=$(wc -l <"$tmp-0.txt")

summary=$(git diff --stat -M $bottom..$top | tail -n 1)
num_files=$(expr "$summary" : ' *\([1-9][0-9]*\) files changed')
num_added=$(expr "$summary" : '.*changed, \([1-9][0-9]*\) insertions')
num_deleted=$(expr "$summary" : '.*, \([1-9][0-9]*\) deletions')

cat <<EOF
During the period of $since .. $until:

	Number of contributors  : $num_contrib
	Number of change sets   : $num_patches
	Number of changed files : $num_files
	Number of added lines   : $num_added
	Number of deleted lines : $num_deleted

Changes during this period are as follows:

EOF

git shortlog -w72,2,4 --no-merges $bottom..$top