From 36d5287449471cbb2ecca9b1e407d6807641d581 Mon Sep 17 00:00:00 2001
From: Matt Enlow <enlow@adobe.com>
Date: Tue, 2 Apr 2024 09:48:07 -0600
Subject: [PATCH] spike: organize config files

---
 lib/style/configs.ex | 34 ++++++++++++++++++++++++++++++++++
 lib/styler.ex        | 12 +++++++-----
 2 files changed, 41 insertions(+), 5 deletions(-)
 create mode 100644 lib/style/configs.ex

diff --git a/lib/style/configs.ex b/lib/style/configs.ex
new file mode 100644
index 00000000..b492b981
--- /dev/null
+++ b/lib/style/configs.ex
@@ -0,0 +1,34 @@
+# Copyright 2024 Adobe. All rights reserved.
+# This file is licensed to you under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License. You may obtain a copy
+# of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software distributed under
+# the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+# OF ANY KIND, either express or implied. See the License for the specific language
+# governing permissions and limitations under the License.
+
+defmodule Styler.Style.Configs do
+  def run({{:import, _, [{:__aliases__, _, [:Config]}]}, _} = zipper, %{config?: true} = ctx) do
+    {:skip, zipper, Map.put(ctx, :mix_config?, true)}
+  end
+
+  def run({{:config, _, args} = config, zm}, %{mix_config?: true} = ctx) when is_list(args) do
+    {configs, others} = Enum.split_while(zm.r, &match?({:config, _, [_|_]}, &1))
+    [config | configs] = Enum.sort_by([config | configs], &Styler.Style.update_all_meta(&1, fn _ -> nil end), :desc)
+    zm = %{zm | l: configs ++ zm.l, r: others}
+    {:skip, {config, zm}, ctx}
+  end
+
+  def run(zipper, %{config?: true} = ctx) do
+    {:cont, zipper, ctx}
+  end
+
+  def run(zipper, %{file: file} = ctx) do
+    if file =~ ~r|config/.*\.exs| do
+      {:cont, zipper, Map.put(ctx, :config?, true)}
+    else
+      {:halt, zipper, ctx}
+    end
+  end
+end
diff --git a/lib/styler.ex b/lib/styler.ex
index 20159777..b6e4ba7e 100644
--- a/lib/styler.ex
+++ b/lib/styler.ex
@@ -24,19 +24,21 @@ defmodule Styler do
     Styler.Style.SingleNode,
     Styler.Style.Defs,
     Styler.Style.Blocks,
-    Styler.Style.Deprecations
+    Styler.Style.Deprecations,
+    Styler.Style.Configs
   ]
 
   @doc false
   def style({ast, comments}, file, opts) do
     on_error = opts[:on_error] || :log
     zipper = Zipper.zip(ast)
-    context = %{comments: comments, file: file}
 
-    {{ast, _}, %{comments: comments}} =
-      Enum.reduce(@styles, {zipper, context}, fn style, {zipper, context} ->
+    {{ast, _}, comments} =
+      Enum.reduce(@styles, {zipper, comments}, fn style, {zipper, comments} ->
+        context = %{comments: comments, file: file}
         try do
-          Zipper.traverse_while(zipper, context, &style.run/2)
+          {zipper, %{comments: comments}} = Zipper.traverse_while(zipper, context, &style.run/2)
+          {zipper, comments}
         rescue
           exception ->
             exception = StyleError.exception(exception: exception, style: style, file: file)