Gulpc bash autocomplete for tasks

.gulpc_autocomplete.bash

#!/bin/bash
# 
# Add task auto-complete to gulpc command
# gulpc command can be setup as an alias:
#   alias gulpc="coffee -c Gulpfile.coffee; gulp"
# Usage:
#   Add this script to your .bashrc / .profile or just source it as
#   needed
#   You should then be able to type gulpc [TAB] and get a list of suggestions
_gulpc() {
    local gulpfile cur prev opts
    COMPREPLY=()
    
    # find the gulpfile.coffee
    gulpfile="$(find . -maxdepth 1 -iname "gulpfile.coffee")"
    
    # exit if no gulpfile found
    if [ -z "$gulpfile" ]; then
        return 1
    fi
    
    # current typed word
    cur="${COMP_WORDS[COMP_CWORD]}"
    
    # previous typed word
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    
    # get the list of tasks
    # opts=$(node -e "var gulp = require('gulp'); require('./gulpfile'); console.log(Object.keys(gulp.tasks).join(' '));")
    opts=$(grep -e '^\s*gulp.task' "${gulpfile}" | awk -F"'|\"" '{print $2}')
    
    COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
    return 0
    
}

complete -F _gulpc gulpc