Build Macports on Mac OS X 10.7 & 10.8 Mountain Lion

##
## Please fill in correct info for the below variables
##
NAME=buildOpenWRT.sh
DIR=/Volumes/OpenWRT/trunk
IP=192.168.1.1 PRT=22 USR=root
GCC=gcc47
OSX=10.8
MACPORTS=2.1.3
DEPENDENCIES='coreutils e2fsprogs ossp-uuid asciidoc binutils bzip2 fastjar flex getopt gtk2 intltool jikes zlib openssl p5-extutils-makemaker python26 rsync ruby sdcc unzip gettext libxslt bison gawk autoconf wget gmake ncurses findutils'

is_xcode_installed () {
    if [ -a /usr/bin/xcodebuild ]
    then
        echo "Xcode installed."
        return 0
    else
        echo "Please install Xcode before continuing."
        return 1
    fi

}
is_cmdlinetools_installed () {

    if [ -a /usr/bin/gcc ]
    then
        echo "Commandline Developer Tools installed."
        return 0
    else
        echo "Please install Xcode Commandline Developer Tools from \
            Apple's website before continuing."
        return 1
    fi
}

convert_osx_version () {

    case $OSX in
        10.4)
            BIGCAT=Tiger
            ;;
        10.5)
            BIGCAT=Leopard
            ;;
        10.6)
            BIGCAT=SnowLeopard
            ;;
        10.7)
            BIGCAT=Lion
            ;;
        10.8)
            BIGCAT=MountainLion
            ;;
    esac
}

install_macports () {
    convert_osx_version

    echo "export PATH=/opt/local/bin:/opt/local/sbin:$PATH" >> ~/.profile
    cd ~/Downloads && \
    curl -O https://distfiles.macports.org/MacPorts/MacPorts-$MACPORTS-$OSX-$BIGCAT.pkg
    sudo installer -verbose -pkg MacPorts-$MACPORTS-$OSX-$BIGCAT.pkg -target /

    is_xcode_installed
    is_cmdlinetools_installed
}


install_dependencies () {
    sudo port -v install $DEPENDENCIES
}

set_compiler () {
    sudo port install $GCC && sudo port select --set gcc mp-$GCC
}


create_targetdisk () {
    echo "script.sh create_targetdisk <SIZE> <NAME> <LOCATION>"
    hdiutil create -size $1 -fs "Case-sensitive HFS+" -volname OpenWRT $2/OpenWRT.sparsebundle
    hdiutil attach OpenWRT.sparsebundle
}

mount_targetdisk () {
    #if mac use hdiutil
    hdiutil attach OpenWRT.sparsebundle
    #if linux use  chroot jail
}

prepare_targetdisk () {
    mkdir -p $DIR/{files,staging_dir/host/{lib,include}/e2fsprogs}
}

update_remote_pkgs ()  {
    ssh -p$PRT $USR@$IP opkg list-installed |\
     sed 's/^\(.*\) - [0-9a-z].*$/\1/;' | tr '\n' ' ' | \
    xargs $DIR/scripts/feeds install
}

pull_remote_config () {
    prepare_targetdisk
        scp -rP$PRT $USR@$IP:/etc $DIR/files
}

pull_sources () {
    cd  $DIR/.. && svn co svn://svn.openwrt.org/openwrt/trunk/
}

compile_prereq () {
    cd $DIR && \
    make prereq
    make defconfig
    make menuconfig
}

compile () {
    cd $DIR && \
    make V=s
}

feeds () {
    if [ -z "$2" ]
    then
        echo "Choose an option: update, install, or uninstall."
    fi
    case  $2 in
        update)
            $DIR/scripts/feeds update -a
            ;;
        install)
            $DIR/scripts/feeds install $3
            ;;
        uninstall)
            $DIR/scripts/feeds uninstall $3
            ;;
        remote)
            update_remote_packages
            ;;
    esac
}

mac_specific_fixes () {
    if [ -z "$1" ]
    then
        echo "Choose a fix: fixMakefile, copyLibraries, or meurig."
    fi
    case  $1 in
        fix[mM]akefile)
            sed -i.bak 's/\(^tools.*\)e2fsprogs/\1/;/\/e2fsprogs/s/^/#/' \
                $DIR/tools/Makefile
            ;;
        copy[lL]ibraries)
            prepare_targetdisk
            cp -R /opt/local/include/ossp  staging_dir/host/include/e2fsprogs/;
            cp /opt/local/lib/libuuid* staging_dir/host/lib
            ;;
        meurig|[cC][cC])
            export {CC,cc}=/opt/local/bin/gcc
            ;;
        *)
            echo "Invalid. Try running ./$NAME macFixes without options"
            ;;
    esac
}

revert_mac_changes () {
    return 0
}

return_help () {
    echo -e "Usage: $NAME <ACTION> [OPTION1] [OPTION2]\n"
    echo "Actions that require no input:"
    echo -e "installMacports, installDependecies, mountWorkspace, pullSources, pullRemoteConfig, compile\n"
    echo "Actions requiring user input:"
    echo "  createWorkspace - Create case-sensitive HFS+ diskimage."
    echo "      syntax: $NAME createWorkspace SIZE LOCATION"
    echo -e "       eg $NAME createWorkspace 15g /Users/username/Desktop\n"
    echo "  macFixes - Mac-specific fixes to enable building of OpenWRT"
    echo "      syntax: $NAME macFixes CHOICE"
    echo -e "       eg $NAME macFixes -> will bring up list of fixes\n"
    echo "  feeds - Work in progress"
}
if [ -z $1 ]
then
    return_help
else
    case $1 in
        install[Mm]acports)
            install_macports
            ;;
        install[Dm]ependencies)
            install_dependencies
            ;;
        mount[Ww]orkspace)
            mount_targetdisk
            ;;
        pull[Ss]ources)
            pull_sources
            ;;
        pullRemoteConfig)
            pull_remote_config
            ;;
        mac[Ff]ixes)
            mac_specific_fixes
            ;;
        create[Ww]orkspace)
            [ -z $2 ] || [ -z $3 ] && return_help || create_targetdisk $2 $3
            ;;
        compile)
            compile_prereq
            compile
            ;;
        *)
            return_help
            ;;
    esac
fi