#!/bin/bash
#
#    Copyright (C) 2006 - 2009  Brian Brazil
#    Copyright (C) 2009  Karl Goetz
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
#


. config

DEBLOB=$PWD/firmware/deblob-2.6.24.4.1
rm -rf $WORKINGDIR
mkdir -p $WORKINGDIR
cd $WORKINGDIR

apt-get source linux-image-$KERNEL_RELEASE-$KERNEL_VERSIONPART-generic
apt-get --yes build-dep linux-image-$KERNEL_RELEASE-$KERNEL_VERSIONPART-generic

function clean_kconfig {
	#$1 = filename $2 = things to remove
	perl -i -ne 'BEGIN{$p=1} if(/^config ('$2')$/){$p=0}elsif(/^(config|endmenu|source|endif)/){$p=1}; print if $p' $1
}

# Remove non-free bits
cd linux-*/
rm -rf debian/firmware/*
bash -x $DEBLOB
# deblob leaves tg3 broken - remove it
rm ./drivers/net/tg3.c
clean_kconfig ./drivers/net/Kconfig 'TIGON3'
sed -i '/tg3\.o/d' ./drivers/net/Makefile
# Also broken by VIDEOBUF_DVB removal
sed -i '/CONFIG_VIDEO_CX23885/d' ./drivers/media/video/Makefile

# Stop b43 module reommending non-free software
# Help from #sed. See sed FAQ and Sams emails to gns-dev 20090814 20090815
sed -i ':more;$!N;s/\n/&/2;tenough;$!bmore;:enough;s|b43err(wl, "You must go to "\n.*"http://linuxwireless.org/en/users/Drivers/b43#devicefirmware "\n.*"and download the correct firmware (version 4).\\n");|b43err(wl, "See http://wiki.gnewsense.org/Documentation/Wireless for instructions on installing free firmware for this device.\\n"); |;P;D' ./drivers/net/wireless/b43/main.c

# Remove non-free ATI code and disable the modules
rm include/video/mach64.h drivers/video/aty/mach64_* drivers/video/aty/atyfb_base.c
clean_kconfig ./drivers/video/Kconfig 'FB_ATY'
clean_kconfig ./drivers/video/Kconfig 'FB_ATY_GX'
clean_kconfig ./drivers/video/Kconfig 'FB_ATY_CT'
clean_kconfig ./drivers/video/Kconfig 'FB_ATY_LCD'
clean_kconfig ./drivers/video/Kconfig 'FB_ATY_GENERIC_LCD'
clean_kconfig ./drivers/video/Kconfig 'FB_ATY_BACKLIGHT'
sed -i '/(CONFIG_FB_ATY)/d' ./drivers/video/Makefile

# Linux seems to build with this removed, not sure where it should disabled
rm include/asm-cris/arch-v10/sv_addr.agh

# More asm-cris issues... Wonder if we'll finish off with any asm-cris at all :|
rm -rf include/asm-cris/arch-v32/hwregs/iop/
rm -rf include/asm-cris/arch-v32/hwregs/asm/
rm -rf include/asm-cris/arch-v32/hwregs/{config_defs,extmem_defs,irq_nmi_defs,strcop_defs,reg_map}.h
rm -rf include/asm-cris/arch-v32/hwregs/{ata_defs,cpu_vect,gio_defs,marb_bp_defs,rt_trace_defs,strmux_defs}.h
rm -rf include/asm-cris/arch-v32/hwregs/{bif_core_defs,intr_vect,marb_defs,ser_defs,bif_slave_defs,eth_defs}.h
rm -rf include/asm-cris/arch-v32/hwregs/{bif_dma_defs,dma_defs,intr_vect_defs,pinmux_defs,sser_defs,timer_defs}.h

# More asm files. scary stuff.
rm -f include/asm-arm/arch-integrator/bits.h
rm -f include/asm-arm/arch-integrator/platform.h
rm -f include/asm-arm/sizes.h

cd ..

rename 's/linux/linux-nofirmware/' linux_*.orig.tar.gz

cd linux-*/

# Changes so it'll compile without firmware
# Need to go to previous revision for ABI stuff - long way of saying second last word
sed -i 's/^prev_revision :=.*$/prev_revision := $(word $(words $(wordlist 2,$(words $(prev_revisions)),$(prev_revisions))),$(prev_revisions))/' debian/rules.d/0-common-vars.mk
echo 'skipmodule = true' >> debian/rules.d/0-common-vars.mk # Having less modules is okay for us
sed -i '/\^-\[\^-\]/,/^fi/d' debian/scripts/abi-check	# Having less symbols is okay for us

# Xen hunk mismatches cause patches to *.orig not to apply
sed -i 's/\(patch -p1\)/\1 --no-backup-if-mismatch/' debian/rules.d/6-binary-custom.mk

echo | dch -D $RELEASE -v $(sed -n '1s#^.*(\(.*\)).*#\1'${DISTRONAME_L}${KERNEL_VERSION}'#p' debian/changelog)  'Removed firmware'

dpkg-buildpackage $DPKGOPTS