The Future of Erlang LS

# Roberto Aloi / Andreas Löscher - CODE BEAM STO V - 20 MAY 2021

Erlang LS is slowly becoming the de-facto standard when it comes to an Erlang development environment. Being completely editor-agnostic, Erlang LS brings the most popular Erlang developer tools such as Elvis, Dialyzer and TypEr to the masses. But what is next?

During this talk we will discover what is cooking among the Erlang LS core contributors. We will peek at the work being done around the Build Server Protocol, which allows language servers to integrate with existing build tools (rebar3 anyone?) and the Debug Adapter Protocol, which can transform your editor into a fully-fledged debugger.

Transcript

1. The Future of Erlang LS ROBERTO ALOI | KLARNA ANDREAS LÖSCHER | WHATSAPP
4. @robertoaloi
5. @thegeorge
6. Erlang LS An editor-agnostic Language Server Providing Language Features for the Erlang Programming Language
7. Erlang LS
8. - Status Update on Erlang LS - Build Server Protocol - Debugger Adapter Protocol
9. Workspace Symbols Code Completion Go To Definition Signature Suggestions Diagnostics Inline Documentation Find References
10. ... Supported Editors
11. What Happened Since Then?
12. Debugger support Unused includes detection Renaming capabilities Symbols highlighting Snippets Type specs generation Contextual completions
14. Complexity
15. Do not reinvent the wheel
16. Do not reinvent rebar3
17. Config Config Config Config Config Config Config Config apps_dirs: - "apps/*" deps_dirs: - "_build/default/lib/*" include_dirs: - "apps" - "apps/*/include" - "_build/default/lib/" - "_build/default/lib/*/include" macros: - name: MEANING_OF_LIFE value: 42 diagnostics: enabled: - unused_includes - unused_macros lenses: enabled: - ct-run-test disabled: - suggest-spec
18. Config Config Config Config Config Config Config Config apps_dirs: - "apps/*" deps_dirs: - "_build/default/lib/*" include_dirs: - "apps" - "apps/*/include" - "_build/default/lib/" - "_build/default/lib/*/include" macros: - name: MEANING_OF_LIFE value: 42 diagnostics: enabled: - unused_includes - unused_macros lenses: enabled: - ct-run-test disabled: - suggest-spec
19. Build Server Protocol
20. Text Editor Language Server Build Server BSP LSP
21. $ rebar3 help bsp ===> Analyzing applications... ===> Compiling rebar3_bsp Plugin adding Build Server Protocol (BSP) support for rebar3 Usage: rebar3 bsp [--generate <generate>] --generate Generate the BSP Connection file and exit
22. Language Server initialize IDE OK Reinvent wheel... Consult config...
23. Language Server initialize IDE OK Discover Build Server... Build Server get paths paths
24. IDE Language Server format edit[] Build Server custom/format edit[]
25. Config Config Config Config Config Config Config Config apps_dirs: - "apps/*" deps_dirs: - "_build/default/lib/*" include_dirs: - "apps" - "apps/*/include" - "_build/default/lib/" - "_build/default/lib/*/include" macros: - name: MEANING_OF_LIFE value: 42 diagnostics: enabled: - unused_includes - unused_macros lenses: enabled: - ct-run-test disabled: - suggest-spec
26. bsp_enabled: true diagnostics: enabled: - unused_includes - unused_macros lenses: enabled: - ct-run-test disabled: - suggest-spec Config
27. github.com/erlang-ls/erlang_ls erlang-ls.github.io github.com/erlang-ls/erlang_ls/issues #erlang-ls Source Code Docs Issue Tracker Slack Thanks!
28. Title - Photo by Emile Guillemot on Unsplash City at Night - Photo by Nastya Dulhiier on Unsplash Speaker - Photo by Med Badr Chemmaoui on Unsplash Goals - Photo by Markus Winkler on Unsplash Coding - Photo by Reza Namdari on Unsplash Hourglass - Photo by Aron Visuals on Unsplash Wires - Photo by John Barkiple on Unsplash Wheels - Photo by Jon Cartagena on Unsplash Pencil - Photo by Kelly Sikkema on Unsplash Bug - Photo by Paulo Ziemer on Unsplash Photo Credits
29. DAP From a Spawnfest Hack to a Product