build.sh

#!/bin/bash

echo "this is an open source script, feel free to use and share it"

daytime=$(date +%d"-"%m"-"%Y"_"%H"-"%M)

location=.
vendor=lge
version=3.4.0

if [ -z $target ]; then
    echo "choose your target device"
    echo "1) 8226 for w7"
    read -p "1/2/3: " choice
    case "$choice" in
        1 ) export target=8226 ; export defconfig=cm12_msm8226_defconfig;;
        * ) echo "invalid choice"; sleep 2 ; $0;;
    esac
fi

if [ -z $compiler ]; then
    if [ -f ../arm-eabi-4.8/bin/arm-eabi-* ]; then
        export compiler=../arm-eabi-4.8/bin/arm-eabi-
    elif [ -f arm-eabi-4.8/bin/arm-eabi-* ]; then # [ -f ../arm-eabi-4.6/bin/arm-eabi-* ]
        export compiler=arm-eabi-4.8/bin/arm-eabi-
    else # [ -f arm-eabi-4.8/bin/arm-eabi-* ]
        echo "please specify a location, including the '/bin/arm-eabi-' at the end "
        read compiler
    fi # [ -z $compiler ]
fi # [ -f ../arm-eabi-4.8/bin/arm-eabi-* ]

cd $location
export ARCH=arm
export CROSS_COMPILE=$compiler
if [ -z "$clean" ]; then
    read -p "do make clean mrproper?(y/n)" clean
fi # [ -z "$clean" ]
case "$clean" in
    y|Y ) echo "cleaning..."; make clean mrproper;;
    n|N ) echo "continuing...";;
    * ) echo "invalid option"; sleep 2 ; build.sh;;
esac

echo "now building the kernel"

START=$(date +%s)

make $defconfig
make -j `cat /proc/cpuinfo | grep "^processor" | wc -l` "$@"

## the zip creation
if [ -f arch/arm/boot/zImage ]; then

    rm -f zip-creator/kernel/zImage
    rm -rf zip-creator/system/

    mkdir -p zip-creator/system/lib/modules

    cp arch/arm/boot/zImage zip-creator/kernel

    find . -name *.ko | xargs cp -a --target-directory=zip-creator/system/lib/modules/

    zipfile="$vendor-$target-v$version-$daytime.zip"
    cd zip-creator
    rm -f *.zip
    zip -r $zipfile * -x *kernel/.gitignore*

    echo "zip saved to zip-creator/$zipfile"

else # [ -f arch/arm/boot/zImage ]
    echo "the build failed so a zip won't be created"
fi # [ -f arch/arm/boot/zImage ]

END=$(date +%s)
BUILDTIME=$((END - START))
B_MIN=$((BUILDTIME / 60))
B_SEC=$((BUILDTIME - E_MIN * 60))
echo -ne "\033[32mBuildtime: "
[ $B_MIN != 0 ] && echo -ne "$B_MIN min(s) "
echo -e "$B_SEC sec(s)\033[0m"