#!/usr/bin/env ruby

require 'sprockets'
require 'optparse'
require 'shellwords'

unless ARGV.delete("--noenv")
  if File.exist?(path = "./.sprocketsrc")
    rcflags = Shellwords.split(File.read(path))
    ARGV.unshift(*rcflags)
  end
end

filenames = []
environment = Sprockets::Environment.new(Dir.pwd)
manifest = nil

(ENV['SPROCKETS_PATH'] || "").split(File::PATH_SEPARATOR).each do |path|
  environment.append_path path
end

OptionParser.new do |opts|
  opts.summary_width = 28
  opts.banner = "Usage: sprockets [options] filename [filename ...]"

  def opts.show_usage
    puts self
    exit 1
  end

  opts.on("-r", "--require LIBRARY", "Require the LIBRARY before doing anything") do |lib|
    require lib
  end

  opts.on("-I DIRECTORY", "--include=DIRECTORY", "Adds the directory to the Sprockets load path") do |directory|
    environment.append_path directory
  end

  opts.on("-o DIRECTORY", "--output=DIRECTORY", "Copy provided assets into DIRECTORY") do |directory|
    manifest = Sprockets::Manifest.new(environment, directory)
  end

  opts.on("--css-compressor=COMPRESSOR", "Use CSS compressor") do |compressor|
    environment.css_compressor = compressor.to_sym
  end

  opts.on("--js-compressor=COMPRESSOR", "Use JavaScript compressor") do |compressor|
    environment.js_compressor = compressor.to_sym
  end

  opts.on("--noenv", "Disables .sprocketsrc file") do
  end

  opts.on_tail("-h", "--help", "Shows this help message") do
    opts.show_usage
  end

  opts.on_tail("-v", "--version", "Shows version") do
    puts Sprockets::VERSION
    exit
  end

  opts.show_usage if ARGV.empty?

  begin
    opts.order(ARGV) do |filename|
      filenames << File.expand_path(filename)
    end
  rescue OptionParser::ParseError => e
    opts.warn e.message
    opts.show_usage
  end
end

if environment.paths.empty?
  warn "No load paths given"
  warn "Usage: sprockets -Ijavascripts/ filename"
  exit 1
end

if manifest
  manifest.compile(filenames)
elsif filenames.length == 1
  puts environment.find_asset(filenames.first).to_s
else
  warn "Only one file can be compiled to stdout at a time"
  exit 1
end