#! /bin/bash
set -e

# Create syslinux configuration or list syslinux configuration files (x86)
# If called with two arguments (source and destination dir), the script will
# create a syslinux configuration; if called with only one argument, it will
# list the files for the created configuration.
# The variables TYPE, DESKTOP and INCLUDE_GTK - which determine the contents
# of the created syslinux configuration - should be set in the environment.

# See also the x86_syslinux target in build/config/x86.cfg and the
# documentation for the SYSLINUX_CFG option in build/README.

SRC="$1"
DST="$2"

[ -d "$SRC" ] || exit 1

if [ -z "$DST" ]; then
	# Only list config files
	cd "$SRC"
	find . -type f | sed "s:\./::"
	exit 0
elif [ ! -d "$DST" ]; then
	exit 1
fi

# Create config for default desktop environment
create_standard_config() {
	cp "$SRC"/syslinux.cfg "$SRC"/menu.cfg "$SRC"/stdmenu.cfg \
	   "$SRC"/prompt.cfg "$SRC"/exithelp.cfg "$DST"/
	cp "$SRC"/{,ad,rq}txt.cfg "$DST"/
	if [ -n "$INCLUDE_GTK" ]; then
		cp "$SRC"/{ad,rq,}gtk.cfg "$DST"/
	fi
}

# Add config for alternative desktop environments
add_desktop_configs() {
	local desktop title

	cp "$SRC"/dtmenu.cfg "$DST"/

	for desktop in kde xfce lxde; do
		mkdir "$DST"/$desktop

		cp "$SRC"/desktop/menu.cfg "$SRC"/desktop/prompt.cfg \
		   "$SRC"/desktop/prmenu.cfg "$DST"/$desktop/
		cp "$SRC"/{,ad}txt.cfg "$DST"/$desktop/
		cp "$SRC"/desktop/{,ad}txtdt.cfg "$DST"/$desktop/
		if [ -n "$INCLUDE_GTK" ]; then
			cp "$SRC"/{,ad}gtk.cfg "$DST"/$desktop/
			cp "$SRC"/desktop/{,ad}gtkdt.cfg "$DST"/$desktop/
		fi

		case $desktop in
			kde)	title=KDE ;;
			xfce)	title=Xfce ;;
			lxde)	title=LXDE ;;
		esac
		sed -i "s/%desktop%/$desktop/
			s/%dt-name%/$title/" "$DST"/$desktop/*.cfg
	done
}

case $TYPE in
    template)
	cp -r "$SRC"/*.cfg "$DST"/
	if [ -z "$INCLUDE_GTK" ]; then
		rm -f "$DST"/*gtk.cfg "$DST"/desktop/*{gtk,ag}dt.cfg
	fi
	exit 0
	;;
    prompt)
	cp "$SRC"/prompt.cfg "$DST"/syslinux.cfg
	cp "$SRC"/menu.cfg "$DST"/
	cp "$SRC"/{,ad,rq}txt.cfg "$DST"/
	;;
    standard)
	create_standard_config
	;;
    all-desktop)
	create_standard_config
	add_desktop_configs
	;;
    *)
	exit 1
	;;
esac

# Set the default desktop environment, or remove if not applicable
if ([ "$TYPE" = prompt ] || [ "$TYPE" = standard ]) && \
   [ -n "$DESKTOP" ]; then
	sed -i "s/%desktop%/$DESKTOP/" "$DST"/*.cfg
else
	sed -i "s/desktop=%desktop% //" "$DST"/*.cfg
fi