Developing Emacs extensions in Go

Geeks Who Drink @nulab on 2017/06/28
https://nulab.connpass.com/event/57238/

Transcript

1. Developing Emacs extensions in Go kiwanami 2017/06/28
2. Topics • Emacs and extension? • Why do I choose go? • Design and implementation of go-elrpc
3. Me • Masashi Sakurai • @kiwanami • Software Developer – Software engineer for medical/hospital systems • OSS – Emacs Lisp, JavaScript • Go – 2016/12 -
4. Emacs and Extensions
5. Emacs? • TEXT EDITOR! – Since mid-1970s and continues actively as of 2017. • Extensible, Customizable!
6. Emacs start up screen
7. Editing code
8. Split windows and color customize
9. IDE like window layout
10. Database integration
11. Web browser and Data analysing with jupyter
12. Reading and Writing Mails
13. Schedule management with calendar services
14. Cacoo Integration
15. 3D FPS(First person sampo) game
16. Online Multi-player 3D FPS
17. Emacs is Great !!
18. Emacs Extension • Pure Emacs Lisp • “Dynamic module” – Since Emacs 25.1 – include “emacs-module.h” – not popular yet... • IPC – STDOUT/IN, TCP Socket, D-bus – Hard to implement...
19. EPC, RPC stack for Emacs Lisp • TCP Socket / S-exp encoding • Language binding – emacs lisp, perl, python, ruby, nodejs, nim, scala
20. Ok, EPC solves problem? • Yes. – Emacs gets powers through other languages. • But, Installing other language environment and package system is very difficult... – perl/CPAN, ruby/gem, node/npm, etc
21. Go may solve the problem • Easy deploying – One binary • Fast and static typing – Comparing with LL • Easy to learn – Simple language and GC – Concurrency → go bindign : go-elrpc
23. Desing and Implementation go-elrpc
24. EPC overview
25. go-elrpc overview • S-exp encoding/decoding – parsing s-exps and serializing data values – type conversion • RPC stack – TCP stream – async and sessions – bi-directional
26. S-exp encoding/decoding • goyacc and handwritten lexer (call add (1 2 3)) Lexer State channel [token] Parser (yacc) S-exp AST rune (unicode char) lexer thread parser thread
27. RPC stack implementation • stream threads and controle thread Receiver thread Sender thread Controle thread decoding encoding socket stream dispatching messages managing sessions User Code RPC Service
28. Type convesion • S-exp (not static typed) input • Types which are needed by static typed functions func add(a int64, b float64) float64 1 (int), 2 (int) input:
29. Performance • echo(a int) int method – perl: 3154 msg/sec – ruby: 10526.3 msg/sec – nodejs: 9174.31 msg/sec – golang: 26347 msg/sec
30. Thank you