#!/bin/sh
#
# This script parses the commit messages between the last 2 git tags
# if the last commit contains the word "Release", otherwise it shows
# all the changes between the last tag and HEAD.
#
# Commits are grouped in different sections specified in the commit
# message with the middle-dot character '·'. The section names are
# arbitrary and we may be careful to use them properly but having
# in mind that this may change.
#
# Commits without any middle·dot in the message are discarted and
# displayed in the "to review" section.
#
# The tool prints Markdown, no plans to support other formats.
#
# --pancake

if [ -n "`git log -n 1 | grep Release`" ]; then
	VERS=`git tag --sort=committerdate | tail -n 1`
	PREV=`git tag --sort=committerdate | tail -n 2 | head -n1`
else
	VERS=HEAD
	PREV=`git tag --sort=committerdate | tail -n 1`
fi

git log ${PREV}..${VERS} > .l
cat .l | grep ^Author | cut -d : -f 2- | sed -e 's,radare,pancake,' | sort -u > .A

echo "Release Notes"
echo "-------------"
echo
echo "Version: ${VERS}"
echo "From: ${PREV}"
echo "To: ${VERS}"
printf "Commits: "
cat .l |grep ^commit |wc -l |xargs echo
echo "Contributors: `wc -l .A | awk '{print $1}'`"
echo
echo "Authors"
echo "-------"
echo
cat .A | perl -ne 'print "*$_"'
# | xargs echo '*'
echo

echo "Changes"
echo "-------"
echo
cat .l | grep -v ^commit | grep -v ^Author | grep -v ^Date > .x
cat .x | grep '##' | perl -ne '/##([^ ]*)/; if ($1) {print "$1\n";}' | sort -u > .y
for a in `cat .y` ; do
	echo "**$a**"
	echo
	cat .x | grep "##$a" | sed -e 's/##.*//g' | perl -ne '{ s/^\s+//; print "* $_"; }'
	echo
done
echo "To Review"
echo "---------"
cat .x | grep -v '##' | sed -e 's,^ *,,g' | grep -v "^$" | \
	perl -ne 'if (/^\*/) { print "$_"; } else { print "* $_";}'
echo
rm -f .x .y .l .A