Setup and start AOSP build with ccache and build target passed as parameter

startbuild.sh

#!/bin/bash

function show_help {
    echo "Usage:"
    echo "./startbuild.sh -t <build_target> [-c -h]"
    echo
    echo "Parameters:"
    echo "-t: specify the build target as per lunch (required)"
    echo "-c: perform a clean build, calling make clean"
    echo "-h: show this"
}

CLEAN=false
THREADS=16

while getopts "cjh?t:" opt; do
    case "$opt" in
    h|\?)
        show_help
        exit 0
        ;;
    c)  CLEAN=true
        ;;
    t)  TARGET=$OPTARG
        ;;
    esac
done

if [ -z "$TARGET" ]; then
    echo "Error: Target required"
    show_help
    exit 0
fi

export USE_CCACHE=1
. build/envsetup.sh 
lunch $TARGET 

if $CLEAN; then
    echo "Cleaning..."
    make clean
fi

echo "Starting build in backgroud"
nohup make -j$THREADS &