LSP for Wren

LSP implementation for Wren.

Features

• Diagnostics (syntax + basic semantic checks)
• Completion (identifiers, members, builtins, class methods)
• Hover
• Go to definition
• References
• Rename
• Semantic tokens
• Document symbols (outline)
• Signature help
• Document highlights
• Code actions (quick fixes)
• Workspace symbols
• Folding ranges
• Selection range
• Inlay hints (type hints for variables)

Demo

Roadmap

• Call hierarchy
• Configurable module resolution
• Cross-module navigation (multi-file)

Releases

Download a binary based on your paltform from releases.

Editor Setup

Neovim

With lspconfig (recommended)

vim.filetype.add({
  extension = {
    wren = "wren",
  },
})

local lspconfig = require("lspconfig")
local configs = require("lspconfig.configs")

if not configs.wren_lsp then
  configs.wren_lsp = {
    default_config = {
      cmd = { "wren-lsp" },
      filetypes = { "wren" },
      root_dir = lspconfig.util.root_pattern("wren-lsp.json", ".git"),
    },
  }
end

lspconfig.wren_lsp.setup({})

Without lspconfig

vim.filetype.add({
  extension = {
    wren = "wren",
  },
})

vim.api.nvim_create_autocmd("FileType", {
  group = vim.api.nvim_create_augroup("wren", {}),
  pattern = "wren",
  callback = function()
    vim.lsp.start({
      name = "Wren LSP",
      cmd = { "wren-lsp" },
      root_dir = vim.loop.cwd(),
      flags = { exit_timeout = 1000 },
    })
  end,
})

VS Code

Install from the Visual Studio Marketplace.

Sublime Text

Install LSP-wren-lsp from Package Control.

Helix

Add this to ~/.config/helix/languages.toml:

[language-server.wren-lsp]
command = "wren-lsp"

[[language]]
name = "wren"
scope = "text.wren"
file-types = ["wren"]
comment-token = "//"
language-servers = ["wren-lsp"]