#!/bin/bash

# Some of the menuconfig variables have recently been renamed.
# This script converts .config-file containing old named variables
# into the new format by doing some regular expression substitutions.

if [ -z "$1" -o ! -f "$1" ]; then
	echo "Usage: $(basename $0) .config-file-to-be-converted"
	exit 1
fi

for pkg in APACHE E2FSPROGS DAVFS2 HPLIP MC NANO PHP WGET XPDF; do
	sed -i -r -e 's|FREETZ_('"${pkg}"'[ _])|FREETZ_PACKAGE_\1|g' "$1"
done
sed -i -r -e 's|FREETZ_COMPILE_TINYPROXY|FREETZ_PACKAGE_TINYPROXY|g;s|FREETZ_BUSYBOX_KEYS|FREETZ_BUSYBOX_FANCY_KEYS|g' "$1"

# is lighttpd selected
if grep -q "FREETZ_PACKAGE_LIGHTTPD=y" "$1" >/dev/null 2>&1; then
	# does .config contain no_mod or zlib entries - if yes this is a .config in old format
	if egrep -q "(FREETZ_PACKAGE_LIGHTTPD_NO_MOD|FREETZ_PACKAGE_LIGHTTPD_WITH_ZLIB)" "$1" >/dev/null 2>&1; then
		# get modules excluded in the old .config
		excluded_mods="$(egrep "FREETZ_PACKAGE_LIGHTTPD_NO_MOD_[A-Z_]+=y" "$1")"
		# add modules not excluded in the old .config
		# note the three required modules could not be excluded in the old .config, so there is no need to handle them separately
		entries_to_add=""
		for mod in \
			ACCESS INDEXFILE STATICFILE \
			ACCESSLOG ALIAS AUTH CGI CML COMPRESS DIRLISTING EVASIVE EVHOST \
			EXPIRE EXTFORWARD FASTCGI FLV_STREAMING MAGNET MYSQL_VHOST \
			PROXY REDIRECT REWRITE RRDTOOL SCGI SECDOWNLOAD SETENV SIMPLE_VHOST \
			SSI STATUS TRIGGER_B4_DL USERDIR USERTRACK WEBDAV; \
		do
			if echo "${excluded_mods}" | grep -q "FREETZ_PACKAGE_LIGHTTPD_NO_MOD_${mod}=y" >/dev/null 2>&1; then
				entries_to_add+="# FREETZ_PACKAGE_LIGHTTPD_MOD_${mod} is not set\n"
			else
				entries_to_add+="FREETZ_PACKAGE_LIGHTTPD_MOD_${mod}=y\n"
			fi
		done

		# convert .config, add modules calculated above, remove zlib/no_mod entries
		sed -i -r \
			-e 's,^(FREETZ_PACKAGE_LIGHTTPD=y.*)$,\1\n'"${entries_to_add}"',g' \
			-e 's,^.*FREETZ_PACKAGE_LIGHTTPD_WITH_ZLIB.*$,,g' \
			-e 's,^.*FREETZ_PACKAGE_LIGHTTPD_NO_MOD.*$,,g' \
			"$1"
	fi
fi