Docker Inspect Export as Compose

.jq

# Put in ~/.jq file

def yamlify2:
    (objects | to_entries | (map(.key | length) | max + 2) as $w |
        .[] | (.value | type) as $type |
        if $type == "array" then
            "\(.key):", (.value | yamlify2)
        elif $type == "object" then
            "\(.key):", "    \(.value | yamlify2)"
        else
            "\(.key):\(" " * (.key | $w - length))\(.value)"
        end
    )
    // (arrays | select(length > 0)[] | [yamlify2] |
        "  - \(.[0])", "    \(.[1:][])"
    )
    // .
    ;

docker-compose-export.sh

#!/bin/bash

# Usage: docker-compose-export.sh <container_name>

sudo docker inspect --format json "$1" | jq -r '{
	services: .[] | {
		(.Name | ltrimstr("/")): {
			container_name: (.Name | ltrimstr("/")),
			image: (.Config.Image),
			ports: (
				.HostConfig.PortBindings
				| to_entries
				| map(
					.key as $container_port
					| .value[]
					| "\(.HostPort):\($container_port)"
				)
			),
			environment: (.Config.Env | map(split("=") | {(.[0]): (.[1:] | join("="))} | select(.[] != "")) | add),
			volumes: (.HostConfig.Binds),
			restart: (.HostConfig.RestartPolicy.Name)
		}
	}
}' | jq -r yamlify2