Protocol Buffers Language Server

Mercari Summer Internship for Engineer 2019

Transcript

1. @ m i c n n c i m Protocol Buffers Language Server Mercari Summer Internship for Engineer 2019
2. TABLE OF CONTENTS About Me What is Internship at Merpay Expert Team? What is Language Server Protocol? What is Protocol Buffers? What is Protocol Buffers Language Server? Future Work
3. ABOUT ME @micnncim Team: Merpay Expert Team Twitter: @micnncim GitHub: @micnncim Interest: Go, Cloud Native, DevOps Blog: micnncim.github.io
4. What is Internship at Merpay Expert Team? Introduction
5. Internship at Merpay Expert Team 1 Go Anything written by Go. 2 OSS Anything related to OSS. Contributions to OSS or/and OSS from scratch.
6. My Output: Protocol Buffers Language Server Language Server for Protocol Buffers Almost nothing ever.
7. What is Language Server Protocol?
8. Language Server Protocol 1 Language Server Language-specific smarts inside a server. Communicate with client in editor / IDE. 2 Protocol A single Language Server can be re-used in multiple development tool. 3 Communication Development tools communicate with server over JSON-RPC.
9. Without LSP https://github.com/gophercon/2019-talks/blob/master/RebeccaStambler-GoPleaseStopBreakingMyEditor/slides.pdf
10. With LSP https://code.visualstudio.com/api/language-extensions/language-server-extension-guide
11. Implementations https://microsoft.github.io/language-server-protocol/implementors/servers
12. Implementations https://microsoft.github.io/language-server-protocol/implementors/servers No Language Server for Protocol Buffers!
13. What is Protocol Buffers?
14. Protocol Buffers IDL Defines structure once, then you can use generated code by multiple languages. Serializer Serializes binary based data. Faster than JSON, etc. Pluggable Design Uses plugins like `protoc-gen-<plugin>` to be extensible.
15. Protocol Buffers https://www.youtube.com/watch?v=AW09fAsEb00
16. What is Protocol Buffers Language Server? micnncim/protocol-buffers-language-server ↓ In progress... mercari/protocol-buffers-language-server
18. Protocol Buffers Language Server Definition Supports `textDocument/definition`. Completion Supports `textDocument/completion` Text Sync Supports `textDocument/didOpen` `textDocument/didChange` `textDocument/didSave`
19. How to implement? Parse code All parsers of protobuf written by Go are incomplete so it's so hard to get desirable info. Follow Protocol LSP gives protocol of >50 methods for language features Run with JSON-RPC Implement communication with JSON-RPC
20. Hard points All of language features e.g.) godef, gopkgs, gocode, guru, gorename, goimports, dlv, goformat, golint, ... Text Synchronization Manages files and status of files in many workplaces: Open, Change, Save
21. https://github.com/gophercon/2019-talks/blob/master/RebeccaStambler-GoPleaseStopBreakingMyEditor/slides.pdf Implement All! Hard points
22. Implement Other Functions textDocument/hover textDocument/publishDia gnostics textDocument/rename etc. Release Packages Homebrew Linuxbrew Snap etc. Improve Performance go-language-server/protocol go-language-server/jsonrpc2 Future Work
23. THANK YOU! Twitter: @micnncim GitHub: @micnncim My Gophers from GopherCon and Go Conference Tokyo