https://developers.google.com/protocol-buffers/docs/encoding Protocol Buffer Polymorphism http://www.indelible.org/ink/protobuf-polymorphism/

http://yura415.github.io/js-protobuf-encode-decode/

https://github.com/sean-lin/protoc-gen-lua

• Latest commit 12 Jun 2014

https://github.com/djungelorm/protobuf-lua

• Latest commit 26 Jan 2016
• Lua rocks: https://luarocks.org/modules/djungelorm/protobuf
• Prerequisities
  • sudo apt-get install python-protobuf
• protoc plugin used: /usr/local/bin/protoc-gen-lua which is symlinked to /usr/local/lib/luarocks/rocks/protobuf/1.1.1-0/protoc-plugin/protoc-gen-lua

https://github.com/urbanairship/protobuf-lua

• Latest commit 13 Nov 2015
• fork of above https://github.com/djungelorm/protobuf-lua
• Lua 5.2 support
• .proto compilation required. Contains protoc plugin for lua

https://github.com/indygreg/lua-protobuf

• Last commit 27 Mar 2011

https://github.com/haberman/upb

• Last commit 8 Jul 2015
• Right now the Lua bindings support:
  • Building schema objects manually (eg. you can essentially write .proto files natively in Lua).
  • creating message objects.
  • parsing Protocol Buffers into message objects.

https://github.com/Neopallium/lua-pb

• Latest commit 18 Feb 2016
• Own LUA parser for .proto files (no need to compile)