make-custom-kernel

#!/bin/bash

CUSTOM_KERNEL_DIR="$1"
BOOT_CONFIG="$2"
THREADS=16

if [ ! -e "$CUSTOM_KERNEL_DIR/Kconfig" ]; then
    echo "Bad kernel source directory"
    exit 1
fi

echo "good"
if [ ! -e "/boot/$BOOT_CONFIG" ]; then
    echo "Missing config file"
    exit 1
fi
echo "good"

# Extract kernel name
KERNEL_NAME=`basename "$CUSTOM_KERNEL_DIR"`

#. "$CUSTOM_KERNEL_DIR"/Makefile
VERSION=`cat "$CUSTOM_KERNEL_DIR"/Makefile | grep -Po '(?<=VERSION = )([\d]+)'`
PATCHLEVEL=`cat "$CUSTOM_KERNEL_DIR"/Makefile | grep -Po '(?<=PATCHLEVEL = )([\d]+)'`
SUBLEVEL=`cat "$CUSTOM_KERNEL_DIR"/Makefile | grep -Po '(?<=SUBLEVEL = )([\d]+)'`
EXTRAVERSION=`cat "$CUSTOM_KERNEL_DIR"/Makefile | grep -Po '(?<=EXTRAVERSION = )([\d\w\-_]+)'`

KERNEL_SUBNAME="$VERSION.$PATCHLEVEL.$SUBLEVEL$EXTRAVERSION"

echo "$KERNEL_NAME"
echo "$KERNEL_SUBNAME"

cd "$CUSTOM_KERNEL_DIR"
cp "/boot/$BOOT_CONFIG" .config

yes '' | make oldconfig
make clean
make -j $THREADS deb-pkg LOCALVERSION=-custom > /dev/null
cd ..
sudo dpkg -i "linux-headers-$KERNEL_SUBNAME-custom_$KERNEL_SUBNAME-custom-1_amd64.deb" \
"linux-image-$KERNEL_SUBNAME-custom_$KERNEL_SUBNAME-custom-1_amd64.deb" \
"linux-image-$KERNEL_SUBNAME-custom-dbg_$KERNEL_SUBNAME-custom-1_amd64.deb" \
"linux-libc-dev_$KERNEL_SUBNAME-custom-1_amd64.deb"

echo "Done!"
exit 0