IDE development with Ruby
summary
Implemented a Ruby language server for the Steep static type checker that speaks LSP and powers a VS Code extension; single-file incremental checks finish ~0.5–1s while full rechecks after .rbs changes can take 1–3 minutes, so the server uses an open-files fast-pass to prioritize edited files and an approach to drop unrelated code to make completion millisecond-responsive. The system runs as a stdio LSP process, shares analysis across editors, and the reported tricks produce noticeably snappier diagnostics and completions in practice.
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chapters (25)
- 0:00Intro
- 2:07Soutaro Matsumoto
- 4:16IDE Powered by Steep
- 8:34Syntax Highlighting/Folding
- 9:07Diagnostics reporting
- 9:29Hover
- 9:57Navigations
- 10:31Completion
- 11:04Refactoring
- 11:31IDE Features
- 12:20Program Analyses Levels
- 16:39Extracting the analyzers?
- 17:10Language Server Protocol (LSP)
- 18:18IDE Development (revised)
- 18:58Language Servers for Ruby
- 19:59Steep Architecture
- 23:16LSP events
- 24:12Simplified Source Code
- 24:50Problem
- 25:30Responsiveness
- 26:14Incremental Type Checking
- 27:04The fast path
- 28:49Open Files First
- 30:33Drop unrelated code
- 32:44IDE Development with Ruby
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