kernel.nu


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#!/usr/bin/env nu

#
# ~~~ kernel updater
#

# get device
let DEVICE_ID = match (uname | get nodename) {
    "glados" => "010",
    "wheatley" => "020",
    "caroline" => "110",
    "cavejohnson" => "120",
    _ => { error make -u { msg: "invalid device" } }
}

# get kernel config location
let DEVICE_CONFIG = match ($DEVICE_ID) {
    "010" | "020" => $"/home/autumn/src/kernel/configs/($DEVICE_ID).config",
    "110" | "120" => $"/root/kernel/configs/($DEVICE_ID).config"
}

# setup kernel
cd /usr/src/linux
cp $DEVICE_CONFIG .config

make oldconfig

# compile kernel
match ($DEVICE_ID) {
    "010" => { make -j20 },
    "020" => { make -j12 },
    "110" => { make -j3 },
    "120" => { make -j8 }
}

# compile modules
emerge -qv @module-rebuild

# install kernel
make modules_install
make install

# build initramfs
dracut -v -f --kernel-image=/boot/vmlinuz

# setup EFI directory
if ($DEVICE_ID == "110") {

    rm /efi/EFI/Linux/Linux.efi

    let OLD_EFI = (ls -l /efi/EFI/Linux/ | get name | first)
    mv $OLD_EFI /efi/EFI/Linux/Linux.efi

} else {

    rm /efi/Linux.efi
    
    let OLD_EFI = (ls -l /efi/EFI/Linux/ | get name | first)
    mv -f $OLD_EFI /efi/Linux.efi

    try { rm -r /efi/EFI /efi/loader }

    sbctl sign-all
}