a dockerfile which i

build_docker.sh

#!/usr/bin/env sh

get_vbox_version(){
    local VER
    VER=$(VBoxManage -v | awk -F "r" '{print $1}')
    if [ -z "$VER" ]; then
        echo "ERROR"
    else
        echo "$VER"
    fi

}

write_vbox_dockerfile(){
    local VER
    VER=$(get_vbox_version)
    if [ ! "$LATEST_RELEASE" = "ERROR" ]; then
        sed "s/\$VBOX_VERSION/$VER/g" Dockerfile.tmpl > Dockerfile
    else
        echo "WUH WOH"
    fi
}

write_vbox_dockerfile

Dockerfile.tmpl

# $VBOX_VERSION should probably be something like 4.3.10 or somesuch
# 
FROM boot2docker/boot2docker-rootfs
RUN apt-get install p7zip-full

RUN mkdir -p /vboxguest && \
    cd /vboxguest && \
    curl -L -o vboxguest.iso http://download.virtualbox.org/virtualbox/$VBOX_VERSION/VBoxGuestAdditions_$VBOX_VERSION.iso && \
    7z x vboxguest.iso -ir'!VBoxLinuxAdditions.run' && \
    sh VBoxLinuxAdditions.run --noexec --target . && \
    mkdir x86 && cd x86 && tar xvjf ../VBoxGuestAdditions-x86.tar.bz2 && cd .. && \
    mkdir amd64 && cd amd64 && tar xvjf ../VBoxGuestAdditions-amd64.tar.bz2 && cd .. && \
    cd amd64/src/vboxguest-$VBOX_VERSION && KERN_DIR=/linux-kernel/ make && cd ../../.. && \
    cp amd64/src/vboxguest-$VBOX_VERSION/*.ko $ROOTFS/lib/modules/$KERNEL_VERSION-tinycore64 && \
    mkdir -p $ROOTFS/sbin && cp x86/lib/VBoxGuestAdditions/mount.vboxsf $ROOTFS/sbin/

RUN depmod -a -b $ROOTFS $KERNEL_VERSION-tinycore64