lib/tasks/bower.rake in bower-rails-0.5.0 vs lib/tasks/bower.rake in bower-rails-0.6.0

@@ -28,22 +28,32 @@
   desc "List bower components"
   task :list do
     perform false do
       sh 'bower list'
     end
-  end  
+  end
 
   namespace :update do
     desc "Update existing components and uninstalls extraneous components"
     task :prune do
       perform do
         sh 'bower update && bower prune'
       end
     end
   end
+
+  desc "Resolve assets paths in bower components"
+  task :resolve do
+    perform false do
+      resolve_asset_paths
+    end
+  end
 end
 
+# Install bower assets before precompile
+Rake::Task['assets:precompile'].enhance ['bower:install', 'bower:resolve']
+
 def perform remove_components = true, &block
   entries = Dir.entries(get_bower_root_path)
 
   if entries.include?('Bowerfile')
     dsl_perform_command remove_components, &block
@@ -53,15 +63,11 @@
     raise LoadError, "No Bowerfile or bower.json file found. Make sure you have it at the root of your project"
   end
 end
 
 def get_bower_root_path
-  if defined?(Rails)
-    return Rails.root
-  else
-    return Dir.pwd
-  end
+  Dir.pwd
 end
 
 def dsl_perform_command remove_components = true, &block
   dsl = BowerRails::Dsl.evalute("Bowerfile")
 
@@ -85,14 +91,30 @@
   bower_root = get_bower_root_path
   #load in bower json file
   txt  = File.read(File.join(bower_root, "bower.json"))
   json = JSON.parse(txt)
 
-  ["lib", "vendor"].each do |dir|
 
+  #load and merge root .bowerrc
+  dot_bowerrc = JSON.parse(File.read(File.join(bower_root, '.bowerrc'))) rescue {}
+  dot_bowerrc["directory"] = "bower_components"
+
+  if json.except('lib', 'vendor').empty?
+    folders = json.keys
+  else
+    raise "Assuming a standard bower package but cannot find the required 'name' key" unless !!json['name']
+    folders = ['vendor']
+  end
+
+  folders.each do |dir|
+    puts "\nInstalling dependencies into #{dir}"
+
     data = json[dir]
 
+    # assume using standard bower.json if folder name is not found
+    data = json if data.nil?
+
     #check folder existence and create?
     dir = File.join(bower_root, dir, "assets")
     FileUtils.mkdir_p dir unless File.directory? dir
     #go in to dir to act
     Dir.chdir(dir) do
@@ -105,11 +127,11 @@
         f.write(data.to_json)
       end
 
       #create .bowerrc
       File.open(".bowerrc", "w") do |f|
-        f.write(JSON.pretty_generate({:directory => "bower_components"}))
+        f.write(JSON.pretty_generate(dot_bowerrc))
       end
 
       #run command
       yield  if block_given?
 
@@ -117,7 +139,35 @@
       FileUtils.rm("bower.json")
 
       #remove .bowerrc
       FileUtils.rm(".bowerrc")
     end if data && !data["dependencies"].empty?
+  end
+end
+
+def resolve_asset_paths
+  # Resolve relative paths in CSS
+  Dir['bower_components/**/*.css'].each do |filename|
+    contents = File.read(filename)
+    # http://www.w3.org/TR/CSS2/syndata.html#uri
+    url_regex = /url\(\s*['"]?(?![a-z]+:)([^'"\)]*)['"]?\s*\)/
+
+    # Resolve paths in CSS file if it contains a url
+    if contents =~ url_regex
+      directory_path = Pathname.new(File.dirname(filename))
+        .relative_path_from(Pathname.new('bower_components'))
+
+      # Replace relative paths in URLs with Rails asset_path helper
+      new_contents = contents.gsub(url_regex) do |match|
+        relative_path = $1
+        image_path = directory_path.join(relative_path).cleanpath
+        puts "#{match} => #{image_path}"
+
+        "url(<%= asset_path '#{image_path}' %>)"
+      end
+
+      # Replace CSS with ERB CSS file with resolved asset paths
+      FileUtils.rm(filename)
+      File.write(filename + '.erb', new_contents)
+    end
   end
 end