Editor Setup

Emacs

https://github.com/vekatze/neut-mode

neut-mode is an Emacs major mode for Neut. The mode provides syntax highlighting and automatic indentation. It also provides a way to use the LSP server via lsp-mode and eglot.

neut-mode is available on Melpa. You can install the package by:

M-x package-install RET neut-mode RET

Below is an example configuration:

(use-package neut-mode
  :init
  (defun my/neut-initialize ()
    (interactive)
    (when (featurep 'lsp-mode)
      (setq-local lsp-before-save-edits t)
      (lsp)))
  (defun my/neut-compile ()
    (interactive)
    (compile (concat "neut zen " (buffer-file-name))))
  (add-hook 'neut-mode-hook 'my/neut-initialize)
  :bind
  (:map neut-mode-map
        ("C-c C-c" . 'my/neut-compile)))

Neovim

https://github.com/vekatze/vim-neut

You can install vim-neut for syntax highlighting and automatic indentation.

The installation process is as usual. Just use your favorite plugin manager like lazy.nvim.

If you want to use the built-in LSP client, for example, you can do something like the following:

vim.api.nvim_create_autocmd("FileType", {
  desc = "Launch Neut's LSP server",
  pattern = "neut",
  callback = function()
    vim.lsp.start({
      name = "neut lsp",
      cmd = { "neut", "lsp" },
      root_dir = vim.fs.dirname(vim.fs.find({ "module.ens" }, { upward = true })[1]),
    })
  end
})

The points are as follows:

• Run neut lsp to start the LSP server
• Look for module.ens to find the root of a module

You should be able to use any other LSP clients for Neovim.

Vim

https://github.com/vekatze/vim-neut

You can install vim-neut for syntax highlighting and automatic indentation.

The installation process is as usual. Just use your favorite plugin manager like vim-plug.

If you want to use vim-lsp, for example, you can do something like the following:

call plug#begin()

" ...

Plug 'vekatze/vim-neut'

Plug 'prabirshrestha/vim-lsp'

" ...

call plug#end()

if executable('neut')
    au User lsp_setup call lsp#register_server({
        \ 'name': 'neut',
        \ 'cmd': {server_info->['neut', 'lsp']},
        \ 'allowlist': ['neut'],
        \ })
endif


function! s:on_lsp_buffer_enabled() abort
    " ... (see the readme of vim-lsp)
endfunction


augroup lsp_install
    " ... (see the readme of vim-lsp)
augroup END

The points are as follows:

• Run neut lsp to start the LSP server
• Look for module.ens to find the root of a module

You should be able to use any other LSP clients for Vim.

Visual Studio Code

https://github.com/vekatze/vscode-neut

You can install vscode-neut for syntax highlighting, automatic indentation, and LSP support. This extension is available on the Visual Studio Marketplace.