genkernel-all.sh

#!/bin/sh
## `genkernel all` wrapper
## altracer1337@gmail.com

#ARCH=x86_64
KV=4.19.57
#FLAV=gentoo
#VERSTR="genkernel-${ARCH}-${KV}-${FLAV}"

# Storage dir
STORE="/home/altracer/linux-${KV}-genkernel-all"
#STORE="$HOME/linux-${KV}-genkernel-all"

emerge_sources(){
# Get the sources and unpack them, possibly using a tbz2
# Might not actually be required here especially since that's the only step with root permissions
    sudo emerge -v =sys-kernel/gentoo-sources-${KV}
}

genkernel_all(){
# Build a generic Linux kernel with default Gentoo configuration non-interactively
# TODO: record the CPU time and RAM taken via `time -v`
#   /usr/bin/time -v genkernel --install kernel initramfs
    sudo genkernel all
}

copy_installed(){
mv -v "$STORE" "$STORE-$(date -Iminutes)"
# Create a package of the results
# TODO: package artifacts from /usr/src/linux-${KV} without depending on `sudo genkernel --install`
env XZ_OPT="-T0" tar -cJvf \
    $STORE/linux-modules-${KV}-gentoo-genkernel-all.tar.xz \
    ./lib/modules/${KV}-gentoo

cp -v \ #config?
    /boot/kernel-genkernel-x86_64-${KV}-gentoo \
    /boot/initramfs-genkernel-x86_64-${KV}-gentoo \
    /boot/System.map-genkernel-x86_64-${KV}-gentoo \
    $STORE/
}

copy_usrsrc(){
TMPDIR=/tmp/linux-modules-${KV}-genkernel-all

mv -v "$STORE" "$STORE-$(date -Iminutes)"
mkdir -p $TMPDIR
cd /usr/src/linux-${KV} || exit 1
env INSTALL_MOD_PATH=$TMPDIR make modules_install
env XZ_OPT="-T0" tar -cJvf \
    $STORE/linux-modules-${KV}-gentoo-genkernel-all.tar.xz \
    -C $TMPDIR ./lib/modules/${KV}-gentoo
cp -v arch/x86/boot/bzImage $STORE/kernel-genkernel-x86_64-${KV}-gentoo
cp -v System.map $STORE/System.map-genkernel-x86_64-${KV}-gentoo
cp -v /var/tmp/genkernel/initramfs-${KV}-gentoo $STORE/initramfs-genkernel-x86_64-${KV}-gentoo
}

concat_package(){
    tar cvf $STORE/../linux-${KV}-genkernel-all.tar $STORE/linux-${KV}-genkernel-all
    7z a -tzip -mx=0 $STORE/../linux-${KV}-genkernel-all.zip $STORE/linux-${KV}-genkernel-all
}

doroot(){
    emerge_sources
    genkernel_all_root
    copy_installed
    concat_package
}

douser(){
#   emerge_sources && chown -R users:portage /usr/src/linux-${KV}
    genkernel_all_user
    copy_usrsrc
    concat_package
}