#!/bin/sh

head=$(git rev-parse HEAD)
branch=$(git symbolic-ref --quiet HEAD)
if [ $? -ne 0 ] ; then
	echo "unknown"
	exit 1
fi

case "$branch" in
	refs/heads/*)
		branch=${branch##refs/heads/}
		;;
	*)
		echo "unknown"
		exit 1
		;;
esac

# Ensure pushed
git branch -r --contains $head | grep --quiet "origin/$branch"
if [ $? -ne 0 ] ; then
	echo "$branch has not been pushed"
	exit 1
fi

# Handle stable special to look for the annotated tag
if [ "$branch" == "stable" ] ; then
	describe=$(git describe $head 2>/dev/null)
	if [ $? -eq 0 ] ; then
		echo "$describe"
	else
		echo "stable-$head"
	fi
	exit 0
fi

number=$(git rev-list --first-parent "$head" ^origin/stable | wc -l)
echo "$branch-$number"