README.md

docker.sh: a small interactive shell hack for docker

Usage: ./docker.sh [base-image-name]

Demo: https://asciinema.org/a/5011

docker.sh

#!/bin/bash
DEBUG=${DEBUG:+-x}
export IMG=${1:-ubuntu}
DOCKERRC=$(dirname $0)/dockerrc
bash --rcfile ${DOCKERRC} ${DEBUG}

dockerrc

shopt -s extdebug
alias docker=lxc-docker
DIRTY="*"
CLEAN=""
STATE=${CLEAN}
PS1="docker@\${REPO}:\${IMG}!\${ID}\${STATE}> "
dockerenv()
{
    CMD=$(history 1 | sed -e "s/^[ ]*[0-9]*[ ]*//g")
    set ${CMD}
    case "$1" in 
	!*)
	    shift
	    eval $@
    	    ;;
	from)
	    IMG=$(docker images -q=true $2 | head -n 1)
	    IMG=${IMG:-$2}
	    ;;
	to)
	    REPO=$2
	    ;;
	pop)
	    LAST=$(docker history "${IMG}" | sed -n 3p)
	    echo rewinding to ${LAST}
	    IMG=$(echo "${LAST}" | cut -d' ' -f1 | cut -d':' -f1)
	    STATE=${DIRTY}
	    ;;
	put)
	    echo commiting $(docker ps -l | sed -n 2p)
	    IMG=$(docker commit "${ID}" ${REPO:-$2})
	    REPO=${2:-${REPO}}
	    STATE=${CLEAN}
	    ;;
	h)
	    docker history "${IMG}"
	    ;;
	enter)
	    docker run -i -t "${IMG}" bash
	    ID=$(docker ps -l -q)
	    ;;
	help)
	    docker ${CMD}
	    echo "Shortcuts:"
	    echo "    from <img>  Set current image."
	    echo "    to <repo>	  Set destination repo."
	    echo "    put [repo]  Commit last command to a new image."
	    echo "    pop         Go back to previous image."
	    echo "    h           Print current image history."
	    echo "    enter       Execute an interactive shell in the container."
	    ;;
	*)
	    docker help $1 2>&1 | grep "Command not found" >  /dev/null
	    if [ $? -eq 0 ]
	    then
		docker run "${IMG}" $(eval echo ${CMD})
		ID=$(docker ps -l -q)
		STATE=${DIRTY}
	    else
		docker $(eval echo ${CMD})
	    fi
	    ;;
    esac
    return 1
}
trap dockerenv DEBUG

Thank you very much for this script, seems like a very handy tool to build docker files while still experimenting