configure

#!/bin/bash

QMAKE=`which qmake`
BUILDDIR=build

show_usage() {
cat <<EOT
Usage: $0 [OPTION]...

This script creates necessary configuration files to build/install.

Main options:
  --prefix=[path]     Base path for build/install.  Default: /usr/local
  --no-builddir       Disable building in subdirectory
  --release           Build in release mode
  --help              This help text.

EOT
}

qmake_check() {
	if [ -x "$1" ]; then
		EXPECTED_QT_VERSION=5
		if [ -f /etc/os-release ]; then
			source /etc/os-release
			if [ "$ID" == "debian" -a "$VERSION_ID" == "10" ]; then
				EXPECTED_QT_VERSION=4
			fi
		fi
		if echo `$1 -v 2>&1` | grep "Qt version $EXPECTED_QT_VERSION\." >/dev/null 2>&1; then
			return 0
		else
			echo "Warning: $1 not for Qt $EXPECTED_QT_VERSION"
		fi
	fi
	return 1
}

relpath=`dirname $0`
relpath=`(cd "$relpath"; /bin/pwd)`
curpath=`/bin/pwd`
substpath=${curpath#${relpath}}

qmake_check "$QMAKE" || exit 1

declare -a SAVED_ARGS=("$@")
declare -a ARGS
while [ $# -gt 0 ]; do
	optarg=`expr "x$1" : 'x[^=]*=\(.*\)'`
	case "$1" in
		--prefix=*)
			PREFIX=$optarg
			shift
			;;
		--no-builddir)
			NOBUILDDIR=y
			shift
			;;
		--release)
			CONFIG_ADD="$CONFIG release"
			CONFIG_SUB="debug"
			shift
			;;
		--help) show_usage; exit 1;;
		--*) shift;;
		*) ARGS+=("$1"); shift;;
#		*) show_usage; exit 1;;
	esac
done

if [ "$curpath" == "$relpath" -a "$NOBUILDDIR" != "y" ]; then
	echo "Building in the '""$BUILDDIR""' subdirectory"
	test -d $BUILDDIR || mkdir $BUILDDIR || exit 1
	cd $BUILDDIR
	exec "../$0" "${SAVED_ARGS[@]}"
fi

if [ "$substpath" == "$curpath" -o \( "${substpath:0:1}" != "" -a "${substpath:0:1}" != "/" \) ]; then
	echo "Can't build in a directory which is not a subdirectory of the source directory"
	exit 1
fi

if [ -z "$CONFIG_ADD" ]; then
	CONFIG_ADD="$CONFIG debug"
	CONFIG_SUB="release"
fi
	
PREFIX=${PREFIX:-/usr/local}

"$QMAKE" -o .qmake.cache.makefile "CONFIG += $CONFIG_ADD" "CONFIG -= $CONFIG_SUB" "PREFIX = $PREFIX" "$relpath"/genconfig.pro "${ARGS[@]}"; rm -f .qmake.cache.makefile
"$QMAKE" -o Makefile "CONFIG += $CONFIG_ADD" "CONFIG -= $CONFIG_SUB" "$relpath"/xconfig.pro "${ARGS[@]}"