#!/bin/sh

set -ex 

CONTAINERRUNTIMES='docker' # currently not enabled podman nerdctl
for CONTAINERRUNTIME in $CONTAINERRUNTIMES /
do
    type $CONTAINERRUNTIME 2>/dev/null && break
    test "$CONTAINERRUNTIME" = / && { 
        echo "install a container runtime (e.g ${CONTAINERRUNTIMES//\ /\/})" >&2
        exit 2
    }
done

HASHES='md5sum cksum sha1sum base64 uuencode'
for HASH in $HASHES /
do
    type $HASH 2>/dev/null && break
    test "$HASH" = / && { 
        echo "install checksum (e.g ${HASHES//\ /\/})" >&2
        exit 3
    }
done

DockerfileContent(){
cat << DOCKERFILEEOF
FROM debian:latest
RUN apt-get update -y && apt-get install -y make
COPY --from=docker:cli /usr/local/bin/docker /usr/local/bin/
COPY --from=docker:cli /usr/local/libexec/docker /usr/local/libexec/docker
DOCKERFILEEOF
}

diff Dockerfile <(DockerfileContent) 2>/dev/null > /dev/null || {
    read -p 'reset/start Dockerfile[Y/n]' YES
    test "$YES" = "n" && { echo "aborting..." >&2; exit 1; }
    DockerfileContent > Dockerfile
}


IMAGE=android-app:"$($HASH Dockerfile | tr -cd '[a-zA-Z0-9]' | head -c 12)"
$CONTAINERRUNTIME build --tag "$IMAGE" .

SOCKET="$($CONTAINERRUNTIME context inspect | grep '"Host":' | cut -d'"' -f4)"
test "${SOCKET:0:8}" = "unix:///" || {
    echo "Container runtime socket needs to be a unix socket and thus mountable" >&2
    exit 4
}

$CONTAINERRUNTIME run -v "${SOCKET:7}":"/var/run/docker.sock" -it --rm "$IMAGE"