docs: update configs.md

skip-checks: true

Author: github-actions[bot]

doc/configs.md

@@ -82,6 +82,7 @@ Nvim by running `:help lspconfig-all`.
 - [dts_lsp](#dts_lsp)
 - [earthlyls](#earthlyls)
 - [ecsact](#ecsact)
+- [efm](#efm)
 - [elixirls](#elixirls)
 - [elmls](#elmls)
 - [elp](#elp)
@@ -3215,6 +3216,43 @@ Default config:
 
 ---
 
+## efm
+
+https://github.com/mattn/efm-langserver
+
+General purpose Language Server that can use specified error message format generated from specified command.
+
+Requires at minimum EFM version [v0.0.38](https://github.com/mattn/efm-langserver/releases/tag/v0.0.38) to support
+launching the language server on single files.
+
+Note: In order for neovim's built-in language server client to send the appropriate `languageId` to EFM, **you must
+specify `filetypes` in your call to `vim.lsp.config`**. Otherwise the server will be launch on the `BufEnter` instead
+of the `FileType` autocommand, and the `filetype` variable used to populate the `languageId` will not yet be set.
+
+```lua
+vim.lsp.config('efm', {
+  filetypes = { 'python','cpp','lua' }
+  settings = ..., -- You must populate this according to the EFM readme
+})
+```
+
+Snippet to enable the language server:
+```lua
+vim.lsp.enable('efm')
+```
+
+Default config:
+- `cmd` :
+  ```lua
+  { "efm-langserver" }
+  ```
+- `root_markers` :
+  ```lua
+  { ".git" }
+  ```
+
+---
+
 ## elixirls
 
 https://github.com/elixir-lsp/elixir-ls

doc/configs.txt

@@ -2284,6 +2284,38 @@ Default config:
   { ".git" }
 <
 
+------------------------------------------------------------------------------
+efm
+
+https://github.com/mattn/efm-langserver
+
+General purpose Language Server that can use specified error message format generated from specified command.
+
+Requires at minimum EFM version [v0.0.38](https://github.com/mattn/efm-langserver/releases/tag/v0.0.38) to support
+launching the language server on single files.
+
+Note: In order for neovim's built-in language server client to send the appropriate `languageId` to EFM, **you must
+specify `filetypes` in your call to `vim.lsp.config`**. Otherwise the server will be launch on the `BufEnter` instead
+of the `FileType` autocommand, and the `filetype` variable used to populate the `languageId` will not yet be set.
+
+```lua
+vim.lsp.config('efm', {
+  filetypes = { 'python','cpp','lua' }
+  settings = ..., -- You must populate this according to the EFM readme
+})
+```
+
+Snippet to enable the language server: >lua
+  vim.lsp.enable('efm')
+
+
+Default config:
+- cmd: >lua
+  { "efm-langserver" }
+- root_markers: >lua
+  { ".git" }
+<
+
 ------------------------------------------------------------------------------
 elixirls