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psalm/docs/running_psalm/language_server.md
2019-06-09 00:54:13 -04:00

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# Using Psalm's Language Server
Psalm now has built-in Language Server Compatibility support so you can run it in your favourite IDE.
It currently supports diagnostics (i.e. finding errors and warnings), go-to-definition and hover.
It works well in a variety of editors (listed alphabetically):
## Emacs
I got it working with [eglot](https://github.com/joaotavora/eglot)
This is the config I used:
```
(when (file-exists-p "vendor/bin/psalm-language-server")
(progn
(require 'php-mode)
(require 'eglot)
(add-to-list 'eglot-server-programs '(php-mode . ("php" "vendor/bin/psalm-language-server")))
(add-hook 'php-mode-hook 'eglot-ensure)
(advice-add 'eglot-eldoc-function :around
(lambda (oldfun)
(let ((help (help-at-pt-kbd-string)))
(if help (message "%s" help) (funcall oldfun)))))
)
)
```
## PhpStorm
I've got it working with [this plugin](https://plugins.jetbrains.com/plugin/10209-lsp-support).
Setup is done via a GUI.
When you install the plugin, you should see a "Language Server Protocol" section under the "Languages & Frameworks" tab.
In the "Server definitions" tab you should add a definition for Psalm:
- Extension: `php`
- Path: `<path-to-php-binary>` e.g. `/usr/local/bin/php`
- this should be an absolute path, not just `php`
- Args: `vendor/bin/psalm-language-server`
In the "Timeouts" tab you can adjust the initialization timeout. This is important if you have a large project. You should set the "Init" value to the number of milliseconds you allow Psalm to scan your entire project and your project's dependencies.
## Sublime Text
I use the excellent Sublime [LSP plugin](https://github.com/tomv564/LSP) with the following config:
```json
"psalm":
{
"command": ["php", "vendor/bin/psalm-language-server"],
"scopes": ["source.php", "embedding.php"],
"syntaxes": ["Packages/PHP/PHP.sublime-syntax"],
"languageId": "php"
}
```
## Vim & Neovim
**ALE**
[ALE](https://github.com/w0rp/ale) has support for Psalm (since v2.3.0).
```
let g:ale_linters = { 'php': ['php', 'psalm'] }
```
**vim-lsp**
I also got it working with [vim-lsp](https://github.com/prabirshrestha/vim-lsp)
This is the config I used (for Vim):
```
au User lsp_setup call lsp#register_server({
\ 'name': 'psalm-language-server',
\ 'cmd': {server_info->[expand('vendor/bin/psalm-language-server')]},
\ 'whitelist': ['php'],
\ })
```
## VS Code
[Get the Psalm plugin here](https://marketplace.visualstudio.com/items?itemName=getpsalm.psalm-vscode-plugin) (Requires VS Code 1.26+):