fix(langs.terraform): Added `terraform_fmt` null-ls formatter.

lua/doom/modules/langs/terraform/init.lua

@@ -1,17 +1,27 @@
 local terraform = {}
 
-terraform.settings = {}
+terraform.settings = {
+  language_server_name = "terraformls",
+}
 
 terraform.autocmds = {
   {
-    "FileType",
-    "terraform",
+    "BufWinEnter",
+    "*.hcl,*.tf,*.tfvars,*.nomad",
     function()
       local langs_utils = require("doom.modules.langs.utils")
-      langs_utils.use_lsp("terraformls")
+      langs_utils.use_lsp(doom.langs.terraform.settings.language_server_name)
 
       local ts_install = require("nvim-treesitter.install")
       ts_install.ensure_installed("hcl")
+      --
+      -- Setup null-ls
+      if doom.features.linter then
+        local null_ls = require("null-ls")
+        langs_utils.use_null_ls_source({
+          null_ls.builtins.formatting.terraform_fmt,
+        })
+      end
     end,
     once = true,
   },

modules.lua

@@ -80,6 +80,7 @@ return {
 
     -- "config",          -- JSON, YAML, TOML
     -- "markdown",
+    -- "terraform",       -- Terraform / hcl files support
   }
 }