docker-complete

#!/bin/bash
#
# Bash completion for docker
# Currently does sub commands and then names for kill
# 
# Depends: socat, jq, sed, awk

_docker_names()
{
    printf "GET /containers/json HTTP/1.1\r\n\r\n" \
        | sudo socat - unix-connect:/var/run/docker.sock \
        | tr -d '\r'  \
        | ( DOIT=0 ;  while read line 
        do 
            if [ "$DOIT" == "1" ] ; then echo $line ; fi
            if [ "$line" == "" ] ; then DOIT="1" ; fi
        done  ; echo "]" // bizarrely socat drops the end "]"??
    ) \
        | jq -r 'map(.Names | .[0]) | .[]' 2> /dev/null \
        | sed -rne 's|/(.*)|\1|p'
}

_docker() 
{
    local cur prev opts
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    opts="$(docker help 2>&1 | awk '/Commands:/ {DOIT=1; next} DOIT==1 {print $1}'  | tr '\n' ' ')"

    case "${prev}" in 
        kill|logs|inspect)
            local names="$(_docker_names)"
            COMPREPLY=( $(compgen -W "${names}" -- ${cur}) )
            return 0
            ;;
    esac

    COMPREPLY=($(compgen -W "${opts}" -- ${cur}))  
    return 0
}


case "$1" in
    depends)
        which jq && exit 1
        which socat && exit 2
        ;;

    names)
        _docker_names
        ;;

    *)
        # Setup the completion by default
        complete -F _docker docker
        ;;
esac

# docker-complete ends here