Docker Compose shortcut

.zshrc

# Docker-Compose shortcut:
#     - before: docker-compose exec app <command>
#     - after: d <command>
# The alias will auto-start the service if it is stopped.

# Requirements:
#     - jq: https://stedolan.github.io/jq/
#     - yq: https://github.com/kislyuk/yq

# Add this to your `~/.zshrc` at the end because `d` is an existing (unrelated) alias we want to override
docker_compose_start_if_stopped () {
    # Find the first service in `docker-compose.yaml`
    export DC_MAIN_SERVICE=`yq '.services|keys[0]' docker-compose.yaml --raw-output`
    # If it is stopped: start it
    STATE=`docker-compose ps $DC_MAIN_SERVICE | tail -n 1 | awk '{print $5}'`
    if [ "$STATE" != "Up" ]
    then
        docker-compose start $DC_MAIN_SERVICE
    fi
}
alias d="docker_compose_start_if_stopped && docker-compose exec $DC_MAIN_SERVICE"

# Reload your terminal:
#     source ~/.zshrc

# Usage:
#     d <the-command-to-run>
# Example:
#     d ls -la

# Commands will be run using `docker-compose exec` in the first service defined in `docker-compose.yaml`.