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#!/usr/bin/env ruby
require 'rubygems'
require 'sinatra'
require 'pathname'

raise "Usage: #$0 <dir>" unless ARGV.size == 1
OUT_DIR = Pathname(ARGV.first)

enable :run
set :public, OUT_DIR

helpers do
  def show name
    glob = OUT_DIR.join(name).to_s + ?*
    send_file Dir[glob].sort_by(&:size).first || halt(404)
  end
end

get '/' do
  show 'index'
end

get '/*' do
  show params[:splat].join(?/)
end