Use config.assets.quiet instead of quiet_assets gem

The quiet_assets gem doesn't support rails 5, but sprockets 3 now has a
config.assets.quiet option, which deprecates the quiet_assets gem. But
the logging gem has a no-op silence method, that's why the quiet option
doesn't work out-of-the-box. I added a little hack to use the silence
method from ActiveSupport, which is also used from the original rails
logger.

Gemfile

@@ -312,7 +312,4 @@ group :development, :test do
   gem "jasmine-jquery-rails",      "2.0.3"
   gem "rails-assets-jasmine-ajax", "3.3.1", source: "https://rails-assets.org"
   gem "sinon-rails",               "1.15.0"
-
-  # silence assets
-  gem "quiet_assets", "1.1.0"
 end

Gemfile.lock

@@ -463,8 +463,6 @@ GEM
       byebug (~> 9.0)
       pry (~> 0.10)
     public_suffix (2.0.5)
-    quiet_assets (1.1.0)
-      railties (>= 3.1, < 5.0)
     rack (1.6.8)
     rack-cors (1.0.1)
     rack-google-analytics (1.2.0)
@@ -826,7 +824,6 @@ DEPENDENCIES
   pronto-scss (= 0.9.1)
   pry
   pry-byebug
-  quiet_assets (= 1.1.0)
   rack-cors (= 1.0.1)
   rack-google-analytics (= 1.2.0)
   rack-piwik (= 0.3.0)

config/environments/development.rb

@@ -32,6 +32,9 @@ Diaspora::Application.configure do
   # Expands the lines which load the assets
   config.assets.debug = true
 
+  # No assets request logging
+  config.assets.quiet = true
+
   # Set the logging destination(s)
   config.log_to = %w[stdout file]
 

config/environments/test.rb

@@ -16,6 +16,9 @@ Diaspora::Application.configure do
   config.serve_static_files = true
   config.static_cache_control = "public, max-age=3600"
 
+  # No assets request logging
+  config.assets.quiet = true
+
   # Show full error reports and disable caching
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false

config/logging.rb

@@ -103,3 +103,10 @@ Logging::Rails.configure do |config|
     end
   end
 end
+
+# Include LoggerSilence from ActiveSupport. This is needed to silent assets
+# requests with `config.assets.quiet`, because the default silence method of
+# the logging gem is no-op. See: https://github.com/TwP/logging/issues/11
+Logging::Logger.send :alias_method, :local_level, :level
+Logging::Logger.send :alias_method, :local_level=, :level=
+Logging::Logger.send :include, LoggerSilence