# µlsp

LSP client for [micro-editor](https://github.com/zyedidia/micro).
Note that this is a work in progress and has not yet been tested extensively – expect there to be some bugs.
Please [open an issue](https://github.com/Andriamanitra/mlsp/issues/new) if you run into any!


## Demo

[https://asciinema.org/a/610761](https://asciinema.org/a/610761)


## Installation

Simply clone the repository to your micro plugins directory:

```
git clone https://github.com/Andriamanitra/mlsp ~/.config/micro/plug/mlsp
```

You will also need to install [language servers](LanguageServers.md) for the
programming languages you want to use.

The plugin currently provides following commands:

- `lsp start deno lsp` starts a language server by executing command `deno lsp`.
  Without arguments the `lsp start` command will try to guess the right server by
  looking at the currently open filetype.
- `lsp stop deno` stops the language server with name `deno`. Without arguments
  the `lsp stop` command will stop _all_ currently running language servers.
- `lsp hover` shows hover information for the code under cursor.
- `lsp format` formats the buffer that is currently open.
- `lsp autocomplete` for code completion suggestions. PROTIP: If you wish to use the
  same key as micro's autocompletion (tab by default), enable `tabAutocomplete`
  in `config.lua` instead of binding `command:lsp autocomplete` to a key!
- `lsp goto-definition` – open the definition for the symbol under cursor
- `lsp goto-declaration` – open the declaration for the symbol under cursor
- `lsp goto-typedefinition` – open the type definition for the symbol under cursor
- `lsp goto-implementation` – open the implementation for the symbol under cursor
- `lsp find-references` - find all references to the symbol under cursor (shows the results in a new pane)
- `lsp document-symbols` - list all symbols in the current document
- `lsp diagnostic-info` - show more information about a diagnostic on the current line (useful for multiline diagnostic messages)

You can type the commands on micro command prompt or bind them to keys by adding
something like this to your `bindings.json`:

```json
{
  "F7": "command:lsp start",
  "F8": "command:lsp format",
  "Alt-h": "command:lsp hover",
  "Alt-d": "command:lsp goto-definition",
  "Alt-r": "command:lsp find-references"
}
```


## Supported features

- [x] get hover information
- [x] show diagnostics (disabled by default, edit `config.lua` to enable)
- [x] autocomplete using tab (disabled by default, edit `config.lua` to enable)
- [x] format document
- [x] format selection
- [x] go to definition
- [x] go to declaration
- [x] go to implementation
- [x] go to type definition
- [x] find references
- [x] list document symbols
- [ ] rename symbol
- [ ] code actions
- [x] incremental document synchronization (better performance when editing large files)
- [ ] [suggest a feature](https://github.com/Andriamanitra/mlsp/issues/new)


## Showing LSP information on statusline

The plugin provides a function `mlsp.status` that can be used in the status line format.
Here is an example configuration (`~/.config/micro/settings.json`) that uses it:

```json
{
    "statusformatl": "$(filename) $(modified)($(line),$(col)) | ft:$(opt:filetype) | µlsp:$(mlsp.status)"
}
```

See [micro documentation](https://github.com/zyedidia/micro/blob/master/runtime/help/options.md)
and the built-in [status plugin](https://github.com/zyedidia/micro/blob/master/runtime/plugins/status/help/status.md)
for more information on customizing the statusline.


## Known issues

- The very first autocompletion with `rust-analyzer` after initialization is very slow (it can take multiple seconds).

## Other similar projects

* [AndCake/micro-plugin-lsp](https://github.com/AndCake/micro-plugin-lsp) is another LSP plugin for micro-editor.