#!/bin/sh

# =============================================================================
# use this script to generate a new kernel config
# usage:
#  $> mkdir SAVE_PLACE/kernconf
#  $> cd /usr/src/sys/${ARCH}/conf
#  $> mk_kern_template.sh > SAVE_PLACE/kernconf/MYKERNEL
#  $> ln -s SAVE_PLACE/kernconf/MYKERNEL MYKERNEL
#  $> cd /usr/src/
#  $> make buildkernel KERNCONF=MYKERNEL
#  $> make installkernel KERNCONF=MYKERNEL
#
# in MYKERNEL: include the following line before the cpu options
#
#	include GENERIC             <- include the GENERIC kernel config,
#                                      allready done by this script, but check
#                                      for duplicates
# 	# nocpu		I486_CPU
#	# nocpu		I586_CPU
# 	# nocpu		I686_CPU
#	ident		MYKERNEL    <- replace MYKERNEL with your kernel name
#
#  Now the easy part, uncomment the nocpu, nooptions, nodevice you don't want
#  to have in the kernel.
#  Keep this file at a save place, and you can easily create a diff between
#  FreeBSD releases to adjust your kernel config
#
#  2006-08-07 olli hauer

IDENT=MYKERNEL

ARCH=$(uname -m)
REL=$(sysctl -n kern.osrelease)
cat << _EOF
#=====================================================================================
#  \$Source\$
#  \$Id\$
#
#  Kernel Config for FreeBSD ${REL} ${ARCH}
#    This config overrides the default settings from GENERIC
#    with the 'no' prefix, so we can track differences of
#    the kernel config between FreeBSD versions easier
#
include GENERIC

_EOF

if [ $# -le 1 ]; then
    GENERIC=/usr/src/sys/${ARCH}/conf/GENERIC
else
    GENERIC=$1
fi

sed -e "s;^ident.*GENERIC;ident 		${IDENT};g" \
    -e 's;^[cpu|device|makeoptions|options]\(.*\);# no&;g' \
    -e 's;^[a-z]\(.*\);# &;g' \
    -e 's;^# noident;ident;g' ${GENERIC}