Italian Swirls 🍝
=================

Minimal Python language server, based on [Jedi][jedi] and [pygls][pygls].

[jedi]: https://jedi.readthedocs.io/en/latest/index.html
[pygls]: https://pygls.readthedocs.io/en/latest/index.html

Still in development but works on my machine. ✨

Supported features:

| LSP method                    | Description                |
|-------------------------------|----------------------------|
| `textDocument/completion`     | Complete                   |
| `textDocument/definition`     | Go to definition           |
| `textDocument/typeDefinition` | Go to type definition      |
| `textDocument/hover`          | Show documentation         |
| `textDocument/references`     | Show references            |
| `textDocument/rename`         | Renaming symbols and files |



Install
-------

You can either clone and build the server package from this repository, or
install it from PyPI:

```bash
pip install italianswirls
```

The only dependencies are pygls and Jedi.

Refer to your client documentation on how to setup a server. Yes I have no idea
how to do it; to use it in Neovim and its native LSP client, I forked
[nvim-lspconfig][lspconfig-fork] to add my own config file. If it gains
attraction I might submit a PR.

[lspconfig-fork]: https://github.com/Dece/nvim-lspconfig

Example lspconfig server configuration:

```lua
local util = require 'lspconfig.util'
local root_files = { 'pyproject.toml', 'setup.cfg' }

return {
  default_config = {
    cmd = { 'italianswirls' },
    filetypes = { 'python' },
    root_dir = util.root_pattern(unpack(root_files)),
    single_file_support = true,
  },
  docs = {
    description = "Minimal Python language server based on Jedi",
    default_config = {
      root_dir = "vim's starting directory",
    },
  },
}
```



About
-----

### Why?

General-purpose servers (e.g. pyls, py-lsp) try to do too much and break stuff
too often for me. Locking Neovim when I press tab, crashes of all kind,
LspRestart failing. Also I like my linting and formatting done by dedicated
tools such as [nvim-lint][nvim-lint] and [formatter][formatter].

[nvim-lint]: https://github.com/mfussenegger/nvim-lint
[formatter]: https://github.com/mhartington/formatter.nvim

Other Jedi-based servers (e.g. jedi-language-server) seem to focus on coc-nvim
and frequently fail on Neovim's native LSP client for me. I tried to fix
jedi-language-server several times when it failed me but I thought it could be
fun to try pygls to redo it as small and simple as I can. And running a Node
server to get Python completions? No way. That said, jedi-language-server is a
good project and if you're fine with coc-nvim you should definitely check it
out. Lots of the code here is ~~stolen~~ inspired from this project.

### Why the name?

Take the string “Is this a Star Wars reference?” Language Server, compress it to
`ITASWRLS` and expand it back to Italian Swirls. Italian dishes are made of few
elements that work well together. Enough questions!

### License

GPLv3.