Six Steps from Zero to IDE (flatMap(Oslo) and ScalaDays Berlin 2018)

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terry_zhang

发布于

5年前

339

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This talk is about the Language Server Protocol and Metals, a language server for Scala that we are building with SemanticDB. The talk explains the architecture of Metals and what components are needed to build a good interactive editing experience for Scala

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1 .Six steps from zero to IDE @olafurpg Watch this talk on YouTube

2 .“The Scala IDE situation is quite possibly the worst out of all the industrial languages in existence. They’re all terrible, especially VS Code or Atom. Just use IntelliJ and hope for the best.” — r/scala, 10 points

3 .Let’s build an IDE!

4 .How hard can it be?

5 . Pretty basic features • Work with my editor • Vim, Sublime Text, VS Code, Atom, Emacs, … • Work with my build tool • sbt, gradle, maven, pants, bazel, mill, cbt, … • Diagnostics • No spurious red squiggles!

6 . Pretty basic features • Goto definition • Project sources, Scala deps, Java deps, classfiles • Auto completions • Scope, auto-import, type members, extension methods • Refactorings • Rename, organize imports, insert type annotation, …

7 .Demo

8 .

9 . Rest of the talk • Language Server Protocol • “Zoo” of Scala language servers • Build Server Protocol • Conclusion

10 . Scala Java Rust Python Vim Sublime VS Code Atom Emacs IntelliJ

11 .Language Server Protocol Vim Scala Sublime VS Code Java Atom Rust Emacs IntelliJ Python

12 . Java Editor Scala

13 .JSON-RPC

14 . Wait, JSON? On every keystroke?

15 . Xi an editor for the next 20 years with with uncompromising performance

16 .

17 .LGTM, where do I sign up?

18 .How to build an IDE 1. 2. 1. Configure LSP 2. Implement the rest of the IDE