Add missing Zip::Entry arguments to Zip::File#get_output_stream

[mdesantis]

Using Zip::File#get_output_stream with a non-Zip::Entry instance as entry argument you cannot specify the other Zip::Entry arguments, like for example compression method.

This monkey patch allows it:

require 'zip'

module Zip
  class File
    def get_output_stream(entry, permissionInt = nil, comment = nil, extra = nil, compressed_size = nil, crc = nil, compression_method = nil, size = nil, time = nil,  &aProc)
      newEntry =
        if entry.kind_of?(Entry)
          entry
        else
          Entry.new(@name, entry.to_s, comment, extra, compressed_size, crc, compression_method, size, time)
        end

      if newEntry.directory?
        raise ArgumentError,
              "cannot open stream to directory entry - '#{newEntry}'"
      end
      newEntry.unix_perms = permissionInt
      zipStreamableEntry  = StreamableStream.new(newEntry)
      @entry_set << zipStreamableEntry
      zipStreamableEntry.get_output_stream(&aProc)
    end
  end
end

# example
Zip::File.open('test.zip', Zip::File::CREATE) do |archive|
  # enter a non compressed entry 
  archive.get_output_stream("first.txt", nil, nil, nil, nil, nil, Zip::Entry::STORED) { |f| f.puts "Hello from ZipFile" }
end

[simonoff]

Can you make a pull request with changes and tests?

[mdesantis]

Yes, I will