forward2docker.sh

#!/bin/sh

# Easily build and start a docker container and set up port forwardings to it
# (by default EXPOSE-ed port + 10000)
# % ./forward2docker <path to Dockerfile>

set -e

dockerfile=$1

test -f "$dockerfile"

test -f "$HOME/.forward2docker/profile" && . "$HOME/.forward2docker/profile"

BOOT2DOCKER=${BOOT2DOCKER-./boot2docker}
PORT_OFFSET=${PORT_OFFSET-10000}

__ssh() {
  ssh_args="$@"

  expect -c "
spawn $BOOT2DOCKER ssh $ssh_args
expect password:
send \"tcuser\\r\"
interact
"
}

### Initialize boot2docker

if [ ! -x $BOOT2DOCKER ]; then
    curl -# https://raw.github.com/steeve/boot2docker/master/boot2docker > boot2docker
    chmod +x boot2docker
fi

if ! $BOOT2DOCKER status; then
    $BOOT2DOCKER init || true
    $BOOT2DOCKER up   || true
    $BOOT2DOCKER status
fi

export DOCKER_HOST=localhost

echo '[forward2docker] boot2docker initialized.' >&2

### Set up image/container

echo '[forward2docker] Building image...' >&2

docker build - < $dockerfile

image=$(docker images -q | head -1)

echo "[forward2docker] Starting container..." >&2

container=$(

docker run -d "$image"

)

port_forwards=$(

docker inspect -format='{{with $n:=.NetworkSettings}}{{range $port,$:=$n.Ports}}{{$n.IPAddress}} {{$port}}{{"\n"}}{{end}}{{end}}' "$container" | while read addr port; do
    if [ -n "$port" ]; then
        port=${port%/tcp}
        local_port=$(($port + $PORT_OFFSET))
        echo "-L$local_port:$addr:$port"
        echo "[forward2docker] $container: listen on port $local_port" >&2
    fi
done

)

echo "[forward2docker] Starting port forwarding..." >&2

__ssh $port_forwards -- echo Success! '&&' docker logs -f "$container" || true

echo "[forward2docker] Cleaning up container..." >&2

docker stop "$container" > /dev/null || true
docker kill "$container" > /dev/null || true
docker rm   "$container" > /dev/null || true