complete

#!/usr/bin/env bash


function _bash_cli() {
    local root_dir;
    root_dir=`dirname "$(perl -e 'use Cwd "abs_path"; print abs_path(shift)' "$(which ${COMP_WORDS[0]})")"`

    local curr_arg;
    curr_arg="${COMP_WORDS[COMP_CWORD]}"

    # Locate the correct command to execute by looking through the app directory
    # for folders and files which match the arguments provided on the command line.
    local cmd_file="$root_dir/app/"
    local cmd_arg_start=1
    while [[ -d "$cmd_file" && $cmd_arg_start -le $COMP_CWORD ]]; do

        # Handle the help virtual command by "ignoring" it
        if [[ "${COMP_WORDS[cmd_arg_start]}" == "help" ]]; then
            cmd_arg_start=$(($cmd_arg_start+1))
            continue
        fi

        cmd_file="$cmd_file/${COMP_WORDS[cmd_arg_start]}"
        cmd_arg_start=$(($cmd_arg_start+1))
    done

    # If we've found something which doesn't exist, then let's
    # look at its containing directory for info.
    if [[ ! -e "$cmd_file" ]]; then
        cmd_file=`dirname $cmd_file`
    fi

    # If we found a command, then suggest the `--help` argument
    # TODO: Add parsing of .usage files for this
    if [[ -f "$cmd_file" ]]; then
        # Check if we've already got a `--help`, don't output anything
        # if we do.
        for i in `seq $cmd_arg_start $COMP_CWORD`; do
            if [[ "${COMP_WORDS[$i]}" == "--help" ]]; then
                COMPREPLY=()
                return
            fi
        done

        COMPREPLY=(`compgen -W '--help' -- "$curr_arg"`)
    # If we found a directory, then show all the commands which are
    # available within it, as well as the `help` virtual command.
    elif [ -d "$cmd_file" ]; then
        local opts=("help")
        while IFS= read -d $'\0' -r file ; do
            opts=("${opts[@]}" `basename $file`)
        done < <(find $cmd_file/ -maxdepth 1 ! -path $cmd_file/ ! -iname '*.*' -print0)
        
        IFS="
        "
        COMPREPLY=(`compgen -W "$(printf '%s\n' "${opts[@]}")" -- "$curr_arg"`)
    fi
}