Useful Makefile snippets for docker usage

docker.mk

name=coursecal-d7
port=$(shell docker inspect -format='{{(index (index .NetworkSettings.Ports "22/tcp") 0).HostPort}}' $(name))


# launches a debug shell into the latest intermediate docker image
debug_latest:
	docker run -t -i `docker images -q | head -n 1` /bin/bash

# DESTROYS all containers (!!) and all images without a tag
# NB: 
# - running containers are protected by 'docker rm'
# - ancestors of tagged images are protected by 'docker rmi'
clean:
	-docker ps -a -q | xargs docker rm
	-docker images -a | grep "^<none>" | awk '{print $$3}' | xargs docker rmi

# SSH into the running container
ssh:
	ssh localhost -l root -p $(port) -o ForwardAgent=yes -o NoHostAuthenticationForLocalhost=yes