#!/bin/sh

usage()

{

	echo "Usage: $0 [--spec]"

	exit 2

}

if [ "$1" = "--spec" ] ; then

	spec_format=1

fi

GIT_DIR=`git rev-parse --git-dir 2>/dev/null`

test -z "$GIT_DIR" && usage

export GIT_DIR

export GIT_PAGER=""

export PAGER=""

mkchlog()

{

	format=$1

	prev_tag=""

	for tag in `git tag -l '*' | sort -V` ; do

		obj=`git describe $tag`

		base=`git merge-base $obj HEAD`

		if [ -z "$base" -o "$base" != $obj ] ; then

			continue

		fi

		all_vers="$prev_tag$tag $all_vers"

		prev_tag=$tag..

	done

	if [ -z "$prev_tag" ] ; then

		all_vers=HEAD

	else

		all_vers="${prev_tag}HEAD $all_vers"

	fi

	for ver in $all_vers ; do

		log_out=`git log $ver -- ./`

		if [ -z "$log_out" ] ; then

			continue

		fi

		ver_name=`echo $ver | sed -e 's/^.*\.\.//'`

		echo ""

		echo "** Version: $ver_name"

		echo ""

		git log --no-merges "${format}" $ver -- ./

		prev_t=$tag..

	done

}

if [ -z "$spec_format" ] ; then

	mkchlog --pretty=format:"%ad %an%n%H%n%n* %s%n" \

		| sed -e 's/^\* /\t* /'

else

	echo "%changelog"

	mkchlog --pretty=format:"- %ad %an: %s"

	echo ""

fi