Fix .jpeg precompile issue

Fixes rails/sprockets-rails#304
rails · Feb 11, 2023 · 411f18d · 411f18d
1 parent 925fb65
commit 411f18d
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 Get upgrade notes from Sprockets 3.x to 4.x at https://github.com/rails/sprockets/blob/master/UPGRADING.md
 
+- Fix for precompile issues when multiple extensions map to the same MIME type (eg. `.jpeg` / `.jpg`). [#781](https://github.com/rails/sprockets/pull/781)
+
 ## 4.2.0
 
 - Rack 3 compatibility. [#758](https://github.com/rails/sprockets/pull/758)

diff --git a/lib/sprockets/loader.rb b/lib/sprockets/loader.rb
@@ -165,7 +165,9 @@ def load_from_unloaded(unloaded)
         end
 
         if type = unloaded.params[:type]
-          logical_path += config[:mime_types][type][:extensions].first
+          extensions = config[:mime_types][type][:extensions]
+          extension = extensions.include?(extname) ? extname : extensions.first
+          logical_path += extension
         end
 
         if type != file_type && !config[:transformers][file_type][type]