activity.sh

#!/bin/bash -e

function usage () {
	echo "$1" duration oldest-branch … newest-branch
	exit 1
}

function count_commits() {
	log_args[0]="origin/$2"
	if [ $# -eq 3 ]
	then
		log_args[1]="^origin/$3"
	fi
	git log --pretty=oneline --since="$1" --merges ${log_args[*]}\
	|grep --count 'Merge pull request' # exclude merges up
}

if [ $# -lt 3 ]
then
	usage "$0"
fi
readonly duration=$1
shift;
readonly oldest_branch=$1
lower_branch=$1
printf "%s:\t%s PR merge commits\n" "$oldest_branch" "$(count_commits "$duration" "$oldest_branch")"
while [ -n "$2" ]
do
	printf "$2:\t%s PR merge commits\n" "$(count_commits "$duration" "$2" "$lower_branch")"
	lower_branch=$2
	shift;
done