Support per-environment ASt service config

activestorage/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Add per-environment configuration support
+
+    *Pietro Moro*
+    
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activestorage/lib/active_storage/engine.rb

@@ -116,7 +116,8 @@ module ActiveStorage
       ActiveSupport.on_load(:active_storage_blob) do
         configs = Rails.configuration.active_storage.service_configurations ||=
           begin
-            config_file = Rails.root.join("config/storage.yml")
+            config_file = Rails.root.join("config/storage/#{Rails.env}.yml")
+            config_file = Rails.root.join("config/storage.yml") unless config_file.exist?
             raise("Couldn't find Active Storage configuration in #{config_file}") unless config_file.exist?
 
             ActiveSupport::ConfigurationFile.parse(config_file)

guides/source/active_storage_overview.md

@@ -97,6 +97,10 @@ config.active_storage.service = :test
 Continue reading for more information on the built-in service adapters (e.g.
 `Disk` and `S3`) and the configuration they require.
 
+NOTE: Configuration files that are environment-specific will take precedence:
+in production, for example, the `config/storage/production.yml` file (if existent)
+will take precedence over the `config/storage.yml` file.
+
 ### Disk Service
 
 Declare a Disk service in `config/storage.yml`: