#!/bin/bash

determine_config_file() {
	if [ "${CMD_KERNEL_CONFIG}" != "" ]
	then
		KERNEL_CONFIG="${CMD_KERNEL_CONFIG}"
	elif [ -f "/etc/kernels/kernel-config-${ARCH}-${KV}" ]
	then
		KERNEL_CONFIG="/etc/kernels/kernel-config-${ARCH}-${KV}"
	elif [ -f "${GK_SHARE}/${ARCH}/kernel-config-${KV}" ]
	then
		KERNEL_CONFIG="${GK_SHARE}/${ARCH}/kernel-config-${KV}"
	elif [ "${DEFAULT_KERNEL_CONFIG}" != "" -a -f "${DEFAULT_KERNEL_CONFIG}" ]
	then
		KERNEL_CONFIG="${DEFAULT_KERNEL_CONFIG}"
	elif [ -f "${GK_SHARE}/${ARCH}/kernel-config-${VER}.${PAT}" ]
	then
		KERNEL_CONFIG="${GK_SHARE}/${ARCH}/kernel-config-${VER}.${PAT}"
	elif [ -f "${GK_SHARE}/${ARCH}/kernel-config" ]
	then
		KERNEL_CONFIG="${GK_SHARE}/${ARCH}/kernel-config"
	else
		gen_die "no kernel config specified, or file not found"
	fi
}

check_term_size () {

TERM_LINES=` stty -a | grep rows | awk '{ print $5 }' | sed s/\;//; `
TERM_COLUMNS=` stty -a | grep rows | awk '{ print $7 }' | sed s/\;//; `

if [[ TERM_LINES -lt 19 || TERM_COLUMNS -lt 80 ]]
then
gen_die "You need a terminal with at least 80 COLS and 19 LINES for menuconfig, lower font size, increase window size, and or try --nomenuconfig"
fi

}


config_kernel() {
	print_info 1 "kernel: configuring source"

	determine_config_file


	if isTrue ${MENUCONFIG}
	then
		check_term_size
	fi
	
	cd "${KERNEL_DIR}" || gen_die "could not switch to kernel directory"

	if isTrue ${MRPROPER}
	then
		print_info 1 "kernel: running mrproper"
		compile_generic "mrproper" kernel
	fi

	# If we're not cleaning, then we don't want to try to overwrite the configs there
	# or we might screw up something someone is trying to test.
	if isTrue ${CLEAN}
	then
		print_info 1 "kernel: using config from ${KERNEL_CONFIG} -- prev backed up to .config.bak"
		cp "${KERNEL_DIR}/.config" "${KERNEL_DIR}/.config.bak" > /dev/null 2>&1
		cp "${KERNEL_CONFIG}" "${KERNEL_DIR}/.config" || gen_die "could not copy config file"

		print_info 1 "kernel: running oldconfig"
		yes "" | compile_generic "oldconfig" kernel

		print_info 1 "kernel: running clean"
		compile_generic "clean" kernel
	else
		print_info 1 "kernel: skipping copy of config. CLEAN is OFF"
	fi
	
	if isTrue ${MENUCONFIG}
	then
		print_info 1 "kernel: running menuconfig"
		make menuconfig
		[ "$?" != "0" ] && gen_die "menuconfig failed"
	fi

}