#!/bin/bash
VERSION=2.1.0
profile=default
tests=no
prefix=NONE
test -e "$CONFIG_SITE" && . "$CONFIG_SITE"
test "$prefix" = NONE && prefix=/usr/local

usage ()
{
	profiles=`ls profiles | sed -e "s/$/,/g" | fmt | sed -e 's/,$//' -e "s/ChangeLog, //"`
	echo ""
	echo "Usage : configure [--prefix=PREFIX] [--select] [--profile=PROFILE]"
	echo ""
	echo "This script allows selecting and configuring a set of MonoDevelop"
	echo "modules to be included in an integrated build."
	echo ""
	echo "The MonoDevelop build system consists of a 'main' module, which "
	echo "contains the main distribution, and a number of additional add-ins"
	echo "in subdirectories of 'extras'. "
	echo ""
	echo "The 'extras' add-ins are designed to be built and distributed separately,"
	echo "and therefore build against your system-installed MonoDevelop by default."
	echo "However, this script sets them up to build against the MonoDevelop in"
	echo "'main', and ensures that they will be loaded when MonoDevelop is launched"
	echo "with 'make run' in this top-level directory. This is very useful for"
	echo "development and testing."
	echo ""
	echo "The first time the configure script is executed, it will ask you"
	echo "to select the add-ins to be included in the build. Further executions"
	echo "will configure only the selected add-ins. To select a new list of"
	echo "add-ins, run this script using the --select option."
	echo ""
	echo "You can also configure a predefined list of modules by specifying"
	echo "a build profile using the --profile option."
	echo ""
	echo "Options:"
	echo ""
	echo "--prefix=PREFIX"
	echo ""
	echo "  Select the install directory prefix."
	echo ""
	echo "--select"
	echo ""
	echo "  Shows a list of add-ins and allows selecting which ones should be"
	echo "  included in the build. It can be used in combination with --profile"
	echo "  to select the add-ins to be built for a specific profile."
	echo ""
	echo "--profile=PROFILE"
	echo ""
	echo "  Configure the build system using the provided profile."
	echo "  A 'profile' is a list of 'extras' directories and arguments for their "
	echo "  configure scripts, and arguments for the 'main' configure script. To "
	echo "  add a profile, simply create a file in the 'profiles' directory."
	echo "  The 'default' profile is used when none is specified."
	echo ""
	echo "  Profiles available:" $profiles 
	echo ""
}

validate_profile ()
{
	test -z "$1" && return 0
	for c in `ls profiles`; do
		if [ "$c" = "$1" ]; then
			return 1
		fi
	done
	return 0
}

select_packages ()
{
	if [[ ! -a profiles/$profile ]] ; then
		cp profiles/stable profiles/$profile
	fi
	n=1
	for p in `sed -e /#/d -e 's/ /,/g' < profiles/all` ; do
		packages[$n]=$p
		if test x1 == x`grep -c -s $p profiles/$profile`; then
			sel=X
		else
			sel=" "
		fi
		selection[$n]=$sel
		let "n=n+1"
	done
	pcount=$n
	while [[ 1 ]]
	do 
		echo Select the packages to include in the build for the profile \'$profile\':
		echo
		n=1
		for p in ${packages[*]} ; do
			echo $n. [${selection[n]}] $p
			let "n=n+1"
		done
		echo
		echo "Enter the number of an add-in to enable/disable,"
		read -a response  -p"(q) quit, (c) clear all, (s) select all, or ENTER to continue:  "
		echo
		if [ -z $response ] ; then
			break
		elif [ $response == q -o $response == Q ] ; then
			exit 1
		elif [ $response == c -o $response == C ] ; then
			for ((n=1; n < pcount; n++))
			do
				selection[$n]=" "
			done
		elif [ $response == s -o $response == S ] ; then
			for ((n=1; n < pcount; n++))
			do
				selection[$n]=X
			done
		elif [ x${selection[response]} = xX ] ; then
			selection[$response]=" "
		else
			selection[$response]=X
		fi
	done
	n=1
	rm -f profiles/$profile
	for p in ${packages[*]} ; do
		if [ x${selection[n]} == xX ]; then
			echo ${packages[n]} >> profiles/$profile
		fi
		let "n=n+1"
	done
}

configure_packages ()
{
	rm -f local-config/*
	localconf=`pwd`/local-config
	for p in `sed -e /#/d -e 's/ /,/g' < profiles/$profile` ; do
		path=`echo $p | cut -d ',' -f 1`
		ops=`echo $p | sed -e s,$path,, -e 's/,/ /'g`
		if test xyes == x$tests; then
			enable_tests=--enable-tests
		else
			enable_tests=" "
		fi
		title="Configuring package: $path"
		nc=`echo $title | wc -m`
		echo $title
		for ((n=1; n < nc; n++)); do echo -n "-"; done
		echo
		echo "Configuration options: $ops"
		if test -a $path/autogen.sh; then
			sct="./autogen.sh $enable_tests"
		elif test -a $path/configure; then
			sct=./configure
		else
			echo Configuration script not found in directory: $p
			exit 1
		fi
		pushd $path > /dev/null
		PKG_CONFIG_PATH=$localconf:$PKG_CONFIG_PATH $sct --prefix=$prefix $ops || exit 1
		popd > /dev/null
		create_local_config $path
		packages="$packages $path"
	done
	rm -f local-config/main.addins
	return 0
}

create_local_config ()
{
	# Get the version from configure.in, if it exists
	if test -a $path/configure.in; then
		ver=`grep AC_INIT $path/configure.in | cut -d "," -f 2 | sed "s/ //"`
	elif test -a $path/configure; then
		ver=`grep ^VERSION= $path/configure | cut -d "=" -f 2 | sed "s/ //"`
	else
		ver=VERSION
	fi

	# Copy the .pc file to local-config, and set the base lib directory
	mkdir -p local-config
	builddir=`pwd`/$path/build
	for f in `ls $1/*.pc.in 2>/dev/null`; do
		pcfile=`echo $f | sed s,.*/,, | sed s/\.in$//`
		sed -e s,libdir=.*,libdir=$builddir, -e s/@VERSION@/$ver/g $f> local-config/$pcfile
	done
	
	# Generate the .addins file for the package
	addins=local-config/`echo $path | sed s,/,_,`.addins
	echo "<Addins>" > $addins
	echo "  <Directory include-subdirs=\"true\">$builddir</Directory>" >> $addins
	echo "</Addins>" >> $addins
}

echo

while test x$1 != x; do
	case $1 in
		--enable-tests)
			tests=yes
			;;
		--prefix=*)
			prefix=`echo $1 | sed 's/--prefix=//'`
			;;
		--prefix)
			shift
			prefix=$1
			;;
		--select)
			select=yes
			;;
		--profile=*)
			prof=`echo $1 | sed 's/--profile=//'`
			profile=$prof
			;;
		--profile)
			shift
			profile=$1
			;;
		--help)
			usage
			exit
			;;
		*)
			echo Unknown argument $1 >&2
			usage
			exit 1
			;;
	esac
	shift
done

# make the build & run use libraries already installed in $PREFIX
if [ -d "$prefix" ]; then
	export MONO_GAC_PREFIX=$prefix:$MONO_GAC_PREFIX
	export PKG_CONFIG_PATH=$prefix/lib/pkgconfig:$prefix/share/pkgconfig:$PKG_CONFIG_PATH
fi

validate_profile "$profile"
if [ ! $? -eq 1 ]; then
	echo "The build profile '$profile' does not exist. A new profile will be created."
fi
if [ x$select == xyes -o ! -a profiles/$profile ]; then
	select_packages
fi

configure_packages
[ $? -eq 1 ] && exit 1

echo -n "SUBDIRS = " > config.make

echo Configuration Summary
echo ---------------------
echo
echo "MonoDevelop has been configured with "
echo "    prefix = $prefix"
echo "    profile = $profile"
echo
echo "Packages included in the build:"
for p in $packages; do
	echo "\\" >> config.make
	echo -n "	$p" >> config.make
	echo "    $p"
done
echo >> config.make
echo

echo -n  "prefix=$prefix" >> config.make