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>

1 files changed, 18 insertions, 0 deletions

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.**
+]],
+  },
+}