class Inspec::ZipProvider

def initialize(path)
  @path = path
  @contents = {}
  @files = []
  walk_zip(@path) do |io|
    while (entry = io.get_next_entry)
      name = entry.name.sub(%r{/+$}, '')
      @files.push(name) unless name.empty?
    end
  end
end

def read(file)
  @contents[file] ||= read_from_zip(file)
end

def read_from_zip(file)
  return nil unless @files.include?(file)
  res = nil
  walk_zip(@path) do |io|
    while (entry = io.get_next_entry)
      next unless file == entry.name
      res = io.read
      break
    end
  end
  res
end

def walk_zip(path, &callback)
  ::Zip::InputStream.open(path, &callback)
end