feat: adds next-ls server configuration (#3155)

* feat: adds next-ls server configuration

* docs: update server_configurations.md
skip-checks: true

* fix: assumes nextls is installed and on $PATH

* docs: update server_configurations.md
skip-checks: true

* fix: updates root_dir method

* docs: update server_configurations.md
skip-checks: true

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

3 files changed, 78 insertions, 0 deletions

diff --git a/doc/server_configurations.md b/doc/server_configurations.md
index 45490469..3a265382 100644
--- a/doc/server_configurations.md
+++ b/doc/server_configurations.md
@@ -166,6 +166,7 @@ autogenerated from the Lua files. You can view this file in Nvim by running
 - [mutt_ls](#mutt_ls)
 - [nelua_lsp](#nelua_lsp)
 - [neocmake](#neocmake)
+- [nextls](#nextls)
 - [nginx_language_server](#nginx_language_server)
 - [nickel_ls](#nickel_ls)
 - [nil_ls](#nil_ls)
@@ -7374,6 +7375,35 @@ require'lspconfig'.neocmake.setup{}
   ```
 
 
+## nextls
+
+https://github.com/elixir-tools/next-ls
+
+**By default, next-ls does not set its `cmd`. Please see the following [detailed instructions](https://www.elixir-tools.dev/docs/next-ls/installation/) for possible installation methods.**
+
+
+
+**Snippet to enable the language server:**
+```lua
+require'lspconfig'.nextls.setup{}
+```
+
+
+**Default values:**
+  - `filetypes` : 
+  ```lua
+  { "elixir", "eelixir", "heex", "surface" }
+  ```
+  - `root_dir` : 
+  ```lua
+  see source file
+  ```
+  - `single_file_support` : 
+  ```lua
+  true
+  ```
+
+
 ## nginx_language_server
 
 https://pypi.org/project/nginx-language-server/
diff --git a/doc/server_configurations.txt b/doc/server_configurations.txt
index 45490469..3a265382 100644
--- a/doc/server_configurations.txt
+++ b/doc/server_configurations.txt
@@ -166,6 +166,7 @@ autogenerated from the Lua files. You can view this file in Nvim by running
 - [mutt_ls](#mutt_ls)
 - [nelua_lsp](#nelua_lsp)
 - [neocmake](#neocmake)
+- [nextls](#nextls)
 - [nginx_language_server](#nginx_language_server)
 - [nickel_ls](#nickel_ls)
 - [nil_ls](#nil_ls)
@@ -7374,6 +7375,35 @@ require'lspconfig'.neocmake.setup{}
   ```
 
 
+## nextls
+
+https://github.com/elixir-tools/next-ls
+
+**By default, next-ls does not set its `cmd`. Please see the following [detailed instructions](https://www.elixir-tools.dev/docs/next-ls/installation/) for possible installation methods.**
+
+
+
+**Snippet to enable the language server:**
+```lua
+require'lspconfig'.nextls.setup{}
+```
+
+
+**Default values:**
+  - `filetypes` : 
+  ```lua
+  { "elixir", "eelixir", "heex", "surface" }
+  ```
+  - `root_dir` : 
+  ```lua
+  see source file
+  ```
+  - `single_file_support` : 
+  ```lua
+  true
+  ```
+
+
 ## nginx_language_server
 
 https://pypi.org/project/nginx-language-server/
diff --git a/lua/lspconfig/server_configurations/nextls.lua b/lua/lspconfig/server_configurations/nextls.lua
new file mode 100644
index 00000000..acecaf76
--- /dev/null
+++ b/lua/lspconfig/server_configurations/nextls.lua
@@ -0,0 +1,18 @@
+local util = require 'lspconfig.util'
+
+return {
+  default_config = {
+    filetypes = { 'elixir', 'eelixir', 'heex', 'surface' },
+    root_dir = function(fname)
+      return util.root_pattern 'mix.exs'(fname) or util.find_git_ancestor(fname)
+    end,
+    single_file_support = true,
+  },
+  docs = {
+    description = [[
+https://github.com/elixir-tools/next-ls
+
+**By default, next-ls does not set its `cmd`. Please see the following [detailed instructions](https://www.elixir-tools.dev/docs/next-ls/installation/) for possible installation methods.**
+]],
+  },
+}