.make-release-support

function hasChanges() {
	test -n "$(git status -s)" 
}

function getRelease() {
	awk -F= '/release/{print $2}' .release
}

function getBaseTag() {
		sed -n -e "s/tag=\([^0-9]*\).*/\1/p" .release
}

function getTag() {
	if [ -z "$1" ] ; then
		awk -F= '/tag/{print $2}' .release
	else
		echo "$(getBaseTag)$1"
	fi
}

function setRelease() {
	set -x
	if [ -n "$1" ] ; then
		sed -i -e "s/release=.*/release=$1/g" .release
		sed -i -e "s/tag=.*/tag=$(getTag $1)/" .release
		rm -f .release-e
	else
		echo "ERROR: missing release version parameter " >&2 
		return 1
	fi
	set +x
}

function tagExists() {
	tag=${1:-$(getTag)}
	test -n "$tag" && test -n "$(git tag | grep "$tag\$")"
}

function differsFromRelease() {
	tag=$(getTag)
	! tagExists $tag || test -n "$(git diff --shortstat -r $tag)" 
}

function getVersion() {
	if hasChanges || differsFromRelease; then
		git describe --long --tags --dirty --always
	else
		getRelease
	fi
}

function nextPatchLevel() {
	version=${1:-$(getRelease)}
	major_and_minor=$(echo $version | cut -d. -f1,2)
	patch=$(echo $version | cut -d. -f3)
	version=$(printf "%s.%d" $major_and_minor $(($patch + 1))) 
	echo $version
}

function nextMinorLevel() { 
	version=${1:-$(getRelease)}
	major=$(echo $version | cut -d. -f1);
	minor=$(echo $version | cut -d. -f2); 
	version=$(printf "%d.%d.0" $major $(($minor + 1))) ; 
	echo $version 
}

function nextMajorLevel() { 
	version=${1:-$(getRelease)}
	major=$(echo $version | cut -d. -f1);
	version=$(printf "%d.0.0" $(($major + 1))) 
	echo $version
}