From fb4571a464568352595f884eb4a7c6728339311d Mon Sep 17 00:00:00 2001
From: Jason Ross <jaross@express.com>
Date: Sun, 27 Sep 2026 20:03:45 -0500
Subject: [PATCH] feat(elixir): add Expert, Treesitter and credo support

Use Expert, the official Elixir language server, with the elixir, heex
and eex parsers, markdown highlighting for Livebook files, and credo
linting in projects that have a .credo.exs.

This stands in for LazyVim's elixir extra. Its nvim-lint opts assign
linters_by_ft outright, which drops every linter configured before it;
enabling it removed the dockerfile and fish linters. Register the
Livebook language from an opts function, since lazy.nvim keeps only the
last init for a plugin and xaml.lua already sets one.
---
 lua/plugins/elixir.lua | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 lua/plugins/elixir.lua

diff --git a/lua/plugins/elixir.lua b/lua/plugins/elixir.lua
new file mode 100644
index 0000000..e692edc
--- /dev/null
+++ b/lua/plugins/elixir.lua
@@ -0,0 +1,34 @@
+-- Stands in for LazyVim's elixir extra, whose nvim-lint opts replace
+-- linters_by_ft outright and drop every linter configured before it.
+return {
+  {
+    "nvim-treesitter/nvim-treesitter",
+    -- A function rather than init: lazy.nvim keeps only the last init for a
+    -- plugin, and xaml.lua sets one too.
+    opts = function(_, opts)
+      vim.treesitter.language.register("markdown", "livebook")
+      vim.list_extend(opts.ensure_installed, { "elixir", "heex", "eex" })
+    end,
+  },
+  {
+    "neovim/nvim-lspconfig",
+    opts = {
+      servers = {
+        expert = {},
+      },
+    },
+  },
+  {
+    "mfussenegger/nvim-lint",
+    opts = {
+      linters_by_ft = { elixir = { "credo" } },
+      linters = {
+        credo = {
+          condition = function(ctx)
+            return vim.fs.find({ ".credo.exs" }, { path = ctx.filename, upward = true })[1] ~= nil
+          end,
+        },
+      },
+    },
+  },
+}