git-change-per-tag

#!/bin/bash

# walk over a tito managed git repo, and show a rough summary of
# how much each tagged release changes. Not particular robust at
# the moment

declare -a releases

branch=
releases=( $(git log $1 --grep="Automatic" --format="format:%H") )

stats () {
	changes=$(git diff --shortstat $1 $2)
	echo $changes
#	if [ -n "$bugs" ] ; then
#		echo  "$bugs"
#		echo
#	fi
}

#handle the special case of changes that aren't released yet
head=$(git log -n1 --format="format:%H")
echo "HEAD"
if [ "$head" != "${releases[0]}" ] ; then
	stats $head ${releases[0]}
fi

count=${#releases[@]}
for (( i = 0 ; i < count; i++ ))
do
	if [ -n "${releases[$i]}" ] &&  [ -n "${releases[$i+1]}" ] ; then		
		version=$(git describe --exact-match "${releases[$i]}")
		# if we want to show the previous release
	        #git describe --exact-match "${releases[$i+1]}" 

		diffstats=$(stats ${releases[$i]} ${releases[$i+1]})
        printf "%-30.30s %s\n" "$version" "$diffstats"
		#echo -e "\t $diffstats"
	fi
done