OpenELEC create_installstick_osx.sh

#!/bin/bash

read_input(){
    local MESSAGE="${1}"
    if [ -n "${MESSAGE}" ];then
        echo "${MESSAGE}"
    fi
    read INPUT
}

write_warning(){
    local MESSAGE=$1
    echo "WARNING: ${MESSAGE}"
}

write_error(){
    local MESSAGE=$1
    echo "ERROR: ${MESSAGE}"
}

plist_value() {
    echo "$1" | xpath "//key[.='$2']/following-sibling::*[1]/text()" 2> /dev/null
}

choose_install_device(){
    echo ""
    echo "#########################################################"
    echo "#                                                       #"
    echo "#            OpenELEC Installer for Mac OS X            #"
    echo "#                                                       #"
    echo "#########################################################"
    echo "#                                                       #"
    echo "#     This will wipe ALL data off your chosen drive     #"
    echo "#    Please read the instructions and use carefully..   #"
    echo "#                                                       #"
    echo "#########################################################"
    echo ""
    echo "The following devices were found:"
    echo ""
    local devices=$(diskutil list -plist | xpath "//key[.='WholeDisks']/following-sibling::*[1]//string" 2>/dev/null | sed 's/\<string\>//g' | sed 's/\<\/string\>/ /g')
    echo "[Device]  [Media name]  [Total size]"
    for device in $devices; do
        local device_info=$(diskutil info -plist $device)
        local size=$(plist_value "$device_info" TotalSize)
        local mediaName=$(plist_value "$device_info" MediaName)
        echo "$device  $mediaName  $size bytes"
    done
    echo ""
    INPUT=""
    while [ -z "${INPUT}" ];do
        read_input "Please enter the install device (e.g. disk1): "
        echo ""
    done
    INSTALL_DEVICE="${INPUT}"
}

check_install_device(){
    diskutil list ${INSTALL_DEVICE} > /dev/null
    if [ $? == 0 ]; then
        diskutil list /dev/"${INSTALL_DEVICE}"
    else
        write_error "Device /dev/${INSTALL_DEVICE} appears to be invalid"
        echo ""
        exit 1
    fi
    echo ""
    write_warning "*** ALL DATA WILL BE WIPED FROM /dev/${INSTALL_DEVICE} ***"
    echo ""
    read -p "Are you sure you want to continue? " -n 1
    if [[ ! $REPLY =~ ^[Yy]$ ]];then
        echo ""
        echo ""
        echo "Goodbye!"
        echo ""
        exit 1
    fi
}

unmount_install_device_partitions(){
    diskutil unmountDisk /dev/${INSTALL_DEVICE} &> /dev/null
}

prepare_install_device(){
    echo ""
    echo ""
    echo "Creating OpenELEC Install Stick"
    echo ""
    diskutil eraseDisk MS-DOS INSTALL MBR /dev/${INSTALL_DEVICE} &> /dev/null
    diskutil unmountDisk /dev/${INSTALL_DEVICE} &> /dev/null
    curl -O http://chewitt.openelec.tv/osx_installstick_files.tar.gz &> /dev/null
    tar -xzvf osx_installstick_files.tar.gz &> /dev/null
    chmod 755 osx_installstick_files/*
    cat osx_installstick_files/mbr.bin > /dev/${INSTALL_DEVICE}
    osx_installstick_files/syslinux -f /dev/${INSTALL_DEVICE}s1 &> /dev/null
}

create_partitions(){
    diskutil unmountDisk /dev/${INSTALL_DEVICE} &> /dev/null
    fdisk -e /dev/${INSTALL_DEVICE} < osx_installstick_files/fdisk.input &> /dev/null
}

install_files(){
    diskutil mountDisk /dev/${INSTALL_DEVICE} &> /dev/null
    cp -a target/KERNEL /Volumes/INSTALL/
    cp -a target/SYSTEM /Volumes/INSTALL/
    cp -a sample.conf/syslinux_installer.cfg /Volumes/INSTALL/syslinux.cfg
}

final_cleanup(){
    diskutil unmountDisk /dev/${INSTALL_DEVICE} &> /dev/null
    fsck_msdos -y /dev/${INSTALL_DEVICE}s1 &> /dev/null
    echo "ALL DONE! ..it's now safe to remove your USB stick"
    echo ""
}

main(){
    if [ $UID != 0 ];then
        echo "This script *must* be run as root"
        exit 1
    fi

    choose_install_device
    check_install_device
    unmount_install_device_partitions
    prepare_install_device
    create_partitions
    install_files
    final_cleanup
    exit 0
}

main