From 4ba3e5bbc7f335bf75255bba0b3ca1c5339f3891 Mon Sep 17 00:00:00 2001
From: Emelia Smith <ThisIsMissEm@users.noreply.github.com>
Date: Fri, 9 Aug 2024 23:41:46 +0200
Subject: [PATCH] Add config/navigation.rb icons detection

---
 lib/tasks/icons.rake | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lib/tasks/icons.rake b/lib/tasks/icons.rake
index 374ea149fee..26b04b2f23f 100644
--- a/lib/tasks/icons.rake
+++ b/lib/tasks/icons.rake
@@ -38,6 +38,20 @@ def find_used_icons
     end
   end
 
+  Rails.root.join('config', 'navigation.rb').open('r') do |file|
+    pattern = /material_symbol\('(?<icon>[^']*)'\)/
+    file.each_line do |line|
+      match = pattern.match(line)
+      next if match.blank?
+
+      # navigation.rb only uses 400x24 icons, per material_symbol() in
+      # app/helpers/application_helper.rb
+      icons_by_weight_and_size[400] ||= {}
+      icons_by_weight_and_size[400][24] ||= Set.new
+      icons_by_weight_and_size[400][24] << match['icon']
+    end
+  end
+
   icons_by_weight_and_size
 end