from_io

# File lib/rubygems/format.rb, line 59
  def self.from_io(io, gem_path="(io)", security_policy = nil)
    format = new gem_path

    Gem::Package.open io, 'r', security_policy do |pkg|
      format.spec = pkg.metadata
      format.file_entries = []

      pkg.each do |entry|
        size = entry.header.size
        mode = entry.header.mode

        format.file_entries << [{
            "size" => size, "mode" => mode, "path" => entry.full_name,
          },
          entry.read
        ]
      end
    end

    format
  end