treesitter-ls

Tree-sitter-based language server for accurate parsing and language-aware features across multiple programming languages.

• 🚀 Multi-language Support - Works with any language that has a Tree-sitter grammar (e.g., Python, JavaScript, Rust, Lua, etc.)
• 🔍 Injection Regions - Detect and handle embedded languages (e.g., Rust in Markdown code blocks)
• ⚙️ LSP Bridge - Redirect LSP requests (go-to-definition, hover, etc.) from injection regions to external language servers (e.g., rust-analyzer)

Installation

Pre-built Binaries

Download the latest release for your platform from GitHub Releases

Enable Automatic Parser/Query Installation

Prepare the following, and treesitter-ls will auto-install parsers/queries as needed:

• tree-sitter CLI
• Git
• C compiler

Setup

See docs/README.md for detailed setup instructions for various editors.

A quick start with Neovim:

make deps/nvim
nvim -u scripts/minimal_init.lua

Supported LSP Features

treesitter-ls supports LSP features via three mechanisms:

• Host: Direct support for the main document language
• Injection: Embedded language regions (e.g., code blocks in Markdown)
• Bridge: Injection regions delegated to external language servers

Feature	Host	Injection	Bridge
Semantic Tokens	✅	✅	❌
Selection Range	✅	✅	❌
Code Actions	✅	✅	✅
Go-to Definition	❌	❌	✅
Go-to Type Definition	❌	❌	✅
Go-to Implementation	❌	❌	✅
Go-to Declaration	❌	❌	✅
Hover	❌	❌	✅
Completion	❌	❌	✅
Signature Help	❌	❌	✅
Find References	❌	❌	✅
Document Highlight	❌	❌	✅
Rename	❌	❌	✅
Formatting	❌	❌	✅
Inlay Hints	❌	❌	✅
Call Hierarchy	❌	❌	✅
Type Hierarchy	❌	❌	✅
Document Link	❌	❌	✅
Folding Range	❌	❌	✅