#!/bin/bash
set -e

function echo_usage {
	echo "usage: mconfigure <package> [options]"
	echo "	-a <arch>"
	echo "	-c : configure only, no compile, pack"
	echo "	-d : compile only"
	echo "	-p : pack only"
}

function set_build {
	if [ -e .svn ]
	then
		version="0.0"
		build=$(svnversion)
		build=${build/:/-}
	elif [ -e .git ]
	then
		tag=$(git describe --tags 2>/dev/null) || true
		if test -z "$tag"
		then
			tag="0.0-TOP"
		fi
		changes=$(git status -s |grep "^ *M") || true
		if test -n "$changes"
		then
			tag="${tag}M"
		fi
		version=${tag%%-*}
		build=${tag#*-}
	fi
}

function check_version {
	vline=$(head -1 debian/$paket.changelog)
	vline=${vline%-*}
	clversion=${vline#*(}
	if [ $version = "0.0" ]
	then
		version=$clversion
		return
	fi
	if [ "$clversion" != $version ]
	then
		echo "version mismatch: git: $version, changelog: $clversion"
		exit 1
	fi
}
# to build a package you need ...
# <package>.cp (optional): copy step for package production
# <package>.cpp.sh (optional): commands to setup the C++ compile environment

if [ $# -lt 1 ]
then
	echo_usage
	exit 1
fi

if [ ! -d debian ]
then
	echo "run mconfigure in the project base directory with a debian directory in it!"
	exit 2
fi

paket=$1

configure=1
compile=1
pack=1
while getopts ":ap" opt; do
	case $opt in
		a) ARCH=$OPTARG
			;;
		c) compile=0
			pack=0
			;;
		d)	configure=0
			pack=0
			;;
		p)	configure=0
			compile=0
			;;
		\?) echo "Invalid option: -$OPTARG"
			echo_usage
			exit 1
			;;
		:) echo "Option -$OPTARG requires an argument."
			echo_usage
			exit 1
			;;
	esac
done

if [ $configure -eq 1 ]
then
	echo "export paket=$1" > debian/setenv.sh
	shift
	ARCH=""
	cpp_build=0

	set_build
	check_version
	echo "export version=$version" >> debian/setenv.sh
	echo "export build=$build" >> debian/setenv.sh

	# get repository name
	tmp=$(pwd)
	pwd=${tmp##*/}
	pwd=${pwd,,*}
	echo "export pwd=$pwd" >> debian/setenv.sh

	echo "building $paket with build $version-$build"

	pushd debian >/dev/null

	ln -sf /usr/share/mbuild/rules .

	#if [ -e tmp ]
	#then
	#	rm -rf tmp
	#fi
	#rm *.stamp 2>/dev/null || true
	#rm make.pre 2>/dev/null || true

	mkdir -p tmp/DEBIAN

	# load util functions for C/C++ - build
	if [ -f $paket.cpp.sh ]
	then
		cpp_build=1
		. projects/tools/make/c_configure.sh
		. $paket.cpp.sh
	fi

	popd >/dev/null

	# copy package control
	if [ ! -f debian/control ]
	then
		control=$(find etc -name $paket.control)
		if [ -z "$control" ]
		then
			echo "warning: control file not found"
			echo "  this file is necessary for any package production."
		else	
			echo "Source: $pwd
	Section: main
	Priority: optional
	Maintainer: WagnerTech UG <mail@wagnertech.de>
	" > debian/control
			grep -v "Version:" $control |grep -v "Maintainer:" >> debian/control 
		fi
	fi
fi

# check for copy file
#if [ ! -f debian/$paket.cp ]
#then
#	# search for copy file
#	copy=$(find . -name $paket.cp)
#	if [ -n "$copy" ]
#	then
#		echo "ln -sf ../$copy debian/"
#		ln -sf ../$copy debian/
#	else
#		echo "warning: file $paket.cp missing or not executable:"
#		echo "  this file is necessary for any package production."
#	fi
#fi

if [ $compile -eq 1 ]
then
	# build artefacts
	. debian/setenv.sh
	debian/rules build
fi

if [ $pack -eq 1 ]
then
	# build package
	. debian/setenv.sh
	debian/rules binary
fi