linux_build_arch.sh

#!/bin/bash

#wget https://aur.archlinux.org/cgit/aur.git/plain/config.x86_64?h=linux-drm-tip-git -O ./.config
zcat /proc/config.gz > ./.config
rm ./arch/x86_64/boot/bzImage

commit="$(git rev-parse --short HEAD)"
echo "commit: $commit"

# set localversion to git commit
sed -i "s|CONFIG_LOCALVERSION=.*|CONFIG_LOCALVERSION=\"-${commit##*.}\"|g" ./.config
sed -i "s|CONFIG_LOCALVERSION_AUTO=.*|CONFIG_LOCALVERSION_AUTO=n|" ./.config

make prepare

# get kernel version
kernver="$(make LOCALVERSION= kernelrelease)"
echo "kernver: $kernver"

make oldconfig

# build
make -j4 LOCALVERSION= bzImage modules

echo "commit: $commit"
echo "kernver: $kernver"

# install modules
echo "Installing modules ..."
sudo make modules_install

echo "Copying ./arch/x86_64/boot/bzImage to /boot/vmlinuz-linux-$kernver ..."
sudo cp ./arch/x86_64/boot/bzImage "/boot/vmlinuz-linux-$kernver"

# set mkinitcpio preset file for kernel
cp /etc/mkinitcpio.d/linux.preset "./linux-$kernver.preset"
sed \
	-e "1s|'linux.*'|'${pkgbase}'|" \
	-e "s|ALL_kver=.*|ALL_kver=\"/boot/vmlinuz-linux-$kernver\"|" \
	-e "s|default_image=.*|default_image=\"/boot/initramfs-$kernver.img\"|" \
	-e "s|fallback_image=.*|fallback_image=\"/boot/initramfs-$kernver-fallback.img\"|" \
	-i "./linux-$kernver.preset"

# generate initramfs
echo "Generating the initramfs ..."
sudo depmod -F System.map -a "$kernver"
sudo mkinitcpio -p "./linux-$kernver.preset"

echo "Now edit /boot/loader/entries/arch.conf as follows:"
echo "linux /vmlinuz-linux-$kernver"
echo "initrd /initramfs-$kernver.img"