#!/usr/bin/env ruby

$:.unshift File.join(File.dirname(__FILE__), *%w[.. lib])

require 'rubygems'
require 'yaml'

help = <<HELP
Dropcaster is a podcast feed generator for the command line.

Basic Usage:
  dropcaster                   Prints a podcast feed document for the mp3 files
                               in the current directory. The channel definition
                               is read from the current directory.
                               
  dropcaster [<file>...]       Prints a podcast feed documentfor the files
                               specified as argument. The channel definition
                               is read from the current directory.

  dropcaster [<dir>...]        Prints a podcast feed document for the files in
                               the directory specified as argument. The channel
                               definition is read from the current directory.

Options:                               
HELP

def usage
  "Run '#{File.basename(__FILE__)} --help' for further help."
end

require 'optparse'
require 'dropcaster'

channel_file = 'channel.yml'

options = {}
opts = OptionParser.new do |opts|
  opts.banner = help

  opts.on("--channel FILE", "Read the channel information from FILE") do |file|
    channel_file = file
  end

  opts.on("--channel-template FILE", "Use FILE as template for the channel") do |file|
    options[:channel_template] = file
  end

  opts.on("--version", "Display current version") do
    puts "#{File.basename(__FILE__)} " + Dropcaster::VERSION
    exit 0
  end
end

opts.parse!

begin
  options.merge! YAML.load_file(channel_file)
rescue
  STDERR.puts "Error: Could not find channel definition."
  puts usage
  exit 1
end

if ARGV.empty?
  src_dir = '.'
else
  src_dir = ARGV
end

begin
  puts Dropcaster::Channel.new(src_dir, options).to_rss
rescue
  puts "Error: #{$!.message}"
  puts usage
  exit(1)
end