A script to put together and build fujitsu_scroll modified psmouse module on alpine

fujitsu_scroll.sh

#!/bin/bash 
set -e 

# A script to put together and build fujitsu_scroll modified psmouse module on alpine

if [ ! -d ~/src/aports ]; then
	echo "error: you need an aports checkout to get the current kernel source"
	exit 1
fi

set -x

sudo apk add linux-lts-dev

if [ ! -d ~/src/fujitsu_scroll ]; then

  cd ~/src
  git clone https://github.com/sammertens/fujitsu_scroll fujitsu_scroll

  cd fujitsu_scroll

else 

  cd ~/src/fujitsu_scroll
  git pull

fi

# freshen the kernel source from aports

# - make sure aports is up to date
cd ~/src/aports/main/linux-lts
git pull

# - make sure its the source for the current running kernel ver
pkgver=$(grep '^pkgver=' APKBUILD | cut -d'=' -f2)
pkgrel=$(grep '^pkgrel=' APKBUILD | cut -d'=' -f2)
[ "$(uname -r | cut -d'-' -f1)" == "$pkgver" ]
# skipping the pkg release number check because it seems they often bump it without checking in the incremented number
# so it won't match
#[ "$(uname -r | cut -d'-' -f2)" == "$pkgrel" ]
[ "$(uname -r | cut -d'-' -f3)" == "lts" ]

marker=.prepared.$(uname -r)

if [ ! -f $marker ]; then

  # - prepare source files
  if [ -d src ]; then
    rm -rf src
  fi
  abuild unpack prepare

  touch $marker

fi

cd src/linux-*/drivers/input/mouse

for f in *.h *.c; do
  if [ "$f" == "psmouse-base.c" ]; then continue; fi
  if [ "$f" == "psmouse.h" ]; then continue; fi
  if [ -f  ~/src/fujitsu_scroll/drivers/input/mouse/"$f" ] && \
	diff "$f" ~/src/fujitsu_scroll/drivers/input/mouse/"$f"; then
 	continue
  fi
  cp "$f" ~/src/fujitsu_scroll/drivers/input/mouse/
done

# ok now build fujitsu scroll version

cd ~/src/fujitsu_scroll

#make -C /lib/modules/$(uname -r)/build M=~/src/fujitsu_scroll/drivers/input/mouse clean
make -C /lib/modules/$(uname -r)/build M=~/src/fujitsu_scroll/drivers/input/mouse modules
sudo make -C /lib/modules/$(uname -r)/build M=~/src/fujitsu_scroll/drivers/input/mouse modules_install

# this will install the module in extras/ since we are using the out of tree build process to build it
# even though it is basically a copy of the module subdir

# rename the original psmouse module to disable it so that our built one in extras will be used
orig_ko=/lib/modules/$(uname -r)/kernel/drivers/input/mouse/psmouse.ko.gz
if [ -f "$orig_ko" ]; then
	sudo mv "$orig_ko" "${orig_ko}.bak"
fi

if lsmod | grep psmouse > /dev/null; then
	sudo rmmod psmouse
fi
sudo depmod
sudo modprobe psmouse "$@" || (
	echo "FAILED TO LOAD, PUTTING BACK ORIGINAL"
	sudo mv "${orig_ko}.bak" "$orig_ko"
	sudo modprobe psmouse
	exit 1
)