dnx

_dnx_completion()
{
    local cur prev opts command help
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    help="-? -h --help"
    opts="$help --version --watch --packages --configuration --port"

    if [ -f ${prev}/project.json ] ; then
        # if there is a project.json in the folder specified by the previous argument
        COMMANDS=$(cat $prev/project.json | python -c 'import json,sys;obj=json.load(sys.stdin);print(" ".join(key for key in obj["commands"].keys()))')
        COMPREPLY=( $(compgen -W "$COMMANDS run" -- ${cur}) )
        return 0
    elif [ ${prev} == dnx ] ; then
        # tab complete folder
        COMPREPLY=( $(compgen -f ) )
        return 0
    else
        # tab complete dnx options 
        COMPREPLY=( $(compgen -W "$opts" -- ${cur}) )

    fi
}
complete -F _dnx_completion dnx