WebAssembly Language Tools

WebAssembly Language Tools aims to provide and improve the editing experience of WebAssembly Text Format. It also provides an out-of-the-box formatter (a.k.a. pretty printer) for WebAssembly Text Format.

📌 Features

Code Completion

Go to Definition

Find References

Hover

Rename

Document Symbols

Diagnostics

Inlay Hint

Code Action

Formatting

Semantic Highlighting

Call Hierarchy

🍵 Usage

We don't provide pre-built binaries at the moment.

If you have installed Rust, you can run Cargo to install:

cargo install --git https://github.com/g-plane/wasm-language-tools.git wat_server

Editor Support

• Visual Studio Code: Install the WebAssembly Language Tools extension.
• Neovim: You need to configure manually at the moment:

  vim.api.nvim_create_autocmd("FileType", {
    pattern = "wat",
    callback = function(args)
      vim.lsp.start({
        name = "wasm-language-tools",
        cmd = { "wat_server" }, -- or the absolute path to the binary
        settings = { -- this section is optional
          wasmLanguageTools = { -- must be under the key "wasmLanguageTools"
            format = {},
            lint = { unused = "warn" },
          },
        },
      })
    end,
  })
  -- Optional: Format on save
  vim.api.nvim_create_autocmd("LspAttach", {
    callback = function(args)
      local client = vim.lsp.get_client_by_id(args.data.client_id)
      if client.name == "wasm-language-tools" then
        vim.api.nvim_create_autocmd("BufWritePre", {
          buffer = args.buf,
          callback = function()
            vim.lsp.buf.format({ bufnr = args.buf, id = client.id })
          end,
        })
      end
    end,
  })

• Zed: Coming soon.
• Helix: Add the following lines to <config_dir>/helix/languages.toml:

  [language-server.wasm-language-tools]
  command = "wat_server" # or the absolute path to the binary
  args = []
  config = { format = {}, lint = { unused = "warn" } } # this section is optional
  
  [[language]]
  name = "wat"
  language-servers = ["wasm-language-tools"]

📜 License

MIT License

Copyright (c) 2024-present Pig Fang