compile_kernel

#!/bin/bash
#
# Used to compile a custom vanilla kernel into a Debian package
#

if [ ! -r .config ] ; then
    echo "You must be in the source directory of a configured kernel."
    exit 1
fi

VERSION=$(git log --oneline | head | cut -d' ' -f2,3 | grep "^Linux" | head -1 | cut -d' ' -f2)

if [ "z$VERSION" = "z" ] ; then
    echo "Could not extract kernel version from the git log."
    exit 2;
fi

# Set the number of parallel runs of gcc
export CONCURRENCY_LEVEL=$1
if [ "z$1" = "z" ] ; then
    export CONCURRENCY_LEVEL=3
fi

# Prime sudo for later
sudo -v

# Compile the kernel into a Debian package
sudo ionice -c3 fakeroot make-kpkg clean
nice eatmydata fakeroot make-kpkg --revision=1.0+custom kernel_image &
BACKGROUND_BUILD=$!
sudo ionice -c3 -p "$BACKGROUND_BUILD"
wait "$BACKGROUND_BUILD" || exit 1

# Install the package
sudo mount -o remount,exec /dev/mapper/ctmp
sudo dpkg -i "../linux-image-$VERSION-grsec+_1.0+custom_"*.deb
sudo mount -o remount /dev/mapper/ctmp