Helper Bash functions for Docker

docker-bash-functions.sh

# Log into a Docker Compose service container, e.g.
#
#   dclogin go_ismtpd
#   dclogin go_i  # also works
#
function dclogin
{
    container=$(docker-compose ps | grep _$1 | head -1 | awk '{print $1}')
    if [ -z "$container" ]; then
        echo "no container found matching $1" > /dev/stderr
        return
    fi
    docker exec -it $container bash
}

# Get the port for the given docker-compose service and port, e.g.
#
#   dcport go_ismtpd 50350
#
function dcport
{
    active=$(docker-machine active)
    activeip=$(docker-machine ip $active)
    docker-compose port $1 $2 | sed -e "s/0.0.0.0/$activeip/"
}

# Loads the Docker Machine environment for the active machine
function dmenv {
    active=$(docker-machine active)
    if [ -n "$active" ]; then
        echo "Activating docker machine '$active'"
        eval "$(docker-machine env $active)"
    else
        echo "No active docker machine running. You should start one."
    fi
}

# Automatically load the Docker Machine environment if there is a Docker-related file in the local directory
if [[ -e "$PWD/docker-compose.yml" || -e "$PWD/Dockerfile" ]]; then dmenv; fi