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#!/bin/sh
KEYDIR="/etc/efikeys/"
KERNEL_NAME="vmlinuz-latest-gentoo"
if [[ $(hostname) = "pc" ]]; then
ROOT_DEVICE="/dev/nvme0n1p3"
MICROCODE="amd"
KERNEL_DIR="/boot/efi/gentoo"
THREADS=12
else
ROOT_DEVICE="/dev/sda3"
MICROCODE="intel"
KERNEL_DIR="/boot/efi/EFI/gentoo"
THREADS=4
fi
ROOT="/dev/mapper/root"
CRYPT_ROOT="$(blkid -s UUID | grep $ROOT_DEVICE | cut -d' ' -f2 | sed 's/"//g')"
BOOT_PARAMS="ro crypt_root=$CRYPT_ROOT root=$ROOT rootfsype=btrfs rootflags=subvol=@ root_trim=yes lsm=selinux"
echo -e "Boot parameters:\n$BOOT_PARAMS\n"
echo -e "\"lsblk -f\" output:\n$(lsblk -f)\n"
echo -e "Kernel image will compiled with $THREADS threads and be installed to $KERNEL_DIR\n"
if [[ $(/usr/bin/id -u) -ne 0 ]]; then
echo "Cannot proceed, need root permissions"
exit 1
fi
echo "Proceed with kernel compiling?[Y/N]"
read answer
if [ "$answer" != "${answer#[Nn]}" ] ;then
echo "Aborted"
exit 1
fi
echo "Starting compilation. Asking for root permissions."
#exit 1
cd /usr/src/linux
# inject $BOOT_PARAMS into kernel
sed -i "s|^\(CONFIG_CMDLINE=\).*|\1\"$BOOT_PARAMS\"|" .config
genkernel --no-clean --no-mrproper --no-save-config \
--microcode="$MICROCODE" \
--integrated-initramfs --compress-initramfs --compress-initramfs-type=lz4 \
--luks --no-zfs \
--btrfs \
--kernel-config=/usr/src/linux/.config \
--kernel-filename="$KERNEL_NAME" \
--makeopts="-j$THREADS" \
--loglevel=3 \
all
#--virtio \
echo "Signing image"
sbsign --key "$KEYDIR/db.key" --cert "$KEYDIR/db.crt" -o "$KERNEL_DIR/$KERNEL_NAME.efi" "/boot/$KERNEL_NAME"
cd -
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