Merge pull request #143 from amatsuda/inline_css_assets

Inline images into application.css during asset compilation

Author: amatsuda

Gemfile

@@ -23,9 +23,9 @@ group :development do
   gem "rubocop-minitest"
   gem "rubocop-performance"
   gem "rubocop-rake"
+  gem "sass"
   gem "sprockets"
   gem "uglifier"
-  gem "yui-compressor"
 end
 
 gem "base64" if RUBY_VERSION >= "3.3"

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/simplecov-ruby/simplecov
-  revision: 0260b1f309e76c8ed87731ebbc348b05d753b8a2
+  revision: b6c2d4208a5fa395ce09d7e1d3b074f680ee29b0
   specs:
     simplecov (0.22.0)
       docile (~> 1.1)
@@ -16,9 +16,12 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    base64 (0.2.0)
     concurrent-ruby (1.3.4)
     docile (1.4.1)
     execjs (2.9.1)
+    ffi (1.17.0)
+    logger (1.6.1)
     minitest (5.15.0)
     parallel (1.24.0)
     parser (3.3.4.2)
@@ -29,9 +32,11 @@ GEM
     rack (3.1.7)
     rainbow (3.1.1)
     rake (13.2.1)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.11.1)
+      ffi (~> 1.0)
     regexp_parser (2.9.2)
     rexml (3.3.6)
-      strscan
     rubocop (1.28.2)
       parallel (~> 1.10)
       parser (>= 3.1.0.0)
@@ -51,34 +56,38 @@ GEM
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
     ruby-progressbar (1.13.0)
+    sass (3.7.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     simplecov_json_formatter (0.1.4)
     sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
       rack (>= 2.2.4, < 4)
-    strscan (3.1.0)
-    strscan (3.1.0-java)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (2.5.0)
-    yui-compressor (0.12.0)
 
 PLATFORMS
   arm64-darwin-22
   ruby
   universal-java-1.8
 
 DEPENDENCIES
+  base64
+  logger
   minitest
   rake (>= 11)
   rubocop
   rubocop-minitest
   rubocop-performance
   rubocop-rake
+  sass
   simplecov!
   simplecov-html!
   sprockets
   uglifier
-  yui-compressor
 
 BUNDLED WITH
    2.3.15

Rakefile

@@ -34,11 +34,20 @@ namespace :assets do
   task :compile do
     puts "Compiling assets"
     require "sprockets"
+    require "sprockets/sass_processor"
+
+    Sprockets.register_processor("text/css") do |input|
+      {data: input[:data].gsub(/(?<!-|_)url\(['"]?(.+?)['"]?\)/) { "asset-data-url(\"#{Regexp.last_match(1)}\")" }}
+    end
+
+    Sprockets.register_processor "text/css", Sprockets::ScssProcessor
+
     assets = Sprockets::Environment.new do |env|
       env.append_path "assets/javascripts"
       env.append_path "assets/stylesheets"
+      env.append_path "public"
       env.js_compressor = :uglify
-      env.css_compressor = :yui
+      env.css_compressor = :scss
     end
     assets["application.js"].write_to("public/application.js")
     assets["application.css"].write_to("public/application.css")

assets/stylesheets/screen.css

@@ -125,7 +125,7 @@ abbr.timeago {
 }
 
 a.src_link {
-  background: url("./magnify.png") no-repeat left 50%;
+  background: url("magnify.png") no-repeat left 50%;
   padding-left: 18px;
 }