Load Bowerfile from all gem dependencies before load

README.md

@@ -224,6 +224,10 @@ BowerRails.configure do |bower_rails|
   # Invokes rake bower:install:deployment instead rake bower:install. Defaults to false
   bower_rails.use_bower_install_deployment = true
 
+  # rake bower:install will search for gem dependencies and in each gem it will search for Bowerfile
+  # and then concatenate all Bowerfile for evaluation
+  bower_rails.use_gem_deps_for_bowerfile = true
+
   # Passes the -F option to rake bower:install or rake bower:install:deployment. Defaults to false.
   bower_rails.force_install = true
 end

lib/bower-rails.rb

@@ -26,6 +26,11 @@ class << self
     # instead of rake bower:install before assets precompilation
     attr_accessor :use_bower_install_deployment
 
+    # If set to true then rake bower:install will search for gem dependencies
+    # and in each gem it will search for Bowerfile and then concatenate all Bowerfile
+    # for evaluation
+    attr_accessor :use_gem_deps_for_bowerfile
+
     # If set to true then rake bower:install[-f] will be invoked
     # instead of rake bower:install before assets precompilation
     attr_accessor :force_install
@@ -58,5 +63,6 @@ def collect_tasks
   @resolve_before_precompile    = false
   @clean_before_precompile      = false
   @use_bower_install_deployment = false
+  @use_gem_deps_for_bowerfile   = false
   @force_install = false
 end

lib/bower-rails/dsl.rb

@@ -7,7 +7,13 @@ class Dsl
     DEFAULT_DEPENDENCY_GROUP = :dependencies
 
     def self.evalute(root_path, filename)
-      new(root_path).tap { |dsl| dsl.eval_file(File.join(root_path, filename)) }
+      new(root_path).tap do |dsl|
+        dsl.send(eval_file_method, File.join(root_path, filename))
+      end
+    end
+
+    def self.eval_file_method
+      BowerRails.use_gem_deps_for_bowerfile ? :eval_file_with_deps : :eval_file
     end
 
     attr_reader :dependencies, :root_path
@@ -67,7 +73,15 @@ def directories
     end
 
     def eval_file(file)
-      instance_eval(File.open(file, "rb") { |f| f.read }, file.to_s)
+      instance_eval(File.open(file, 'rb') { |f| f.read }, file.to_s)
+    end
+
+    def eval_file_with_deps(file)
+      Gem::Specification.map do |dep|
+        bowerfile_in_dep = File.join(dep.gem_dir, 'Bowerfile')
+        eval_file(bowerfile_in_dep) if bowerfile_in_dep != file && File.exist?(bowerfile_in_dep)
+      end
+      eval_file(file)
     end
 
     def final_assets_path

spec/bower-rails/dsl_spec.rb

@@ -144,4 +144,42 @@
       subject.send(:default_group).should eq [:vendor, { :assets_path => "assets/somepath" }]
     end
   end
+
+  describe '.evalute' do
+    let(:tmp_bowerfile) { 'asset "moment"' }
+    before do
+      allow(File).to receive(:open).with('tmp/Bowerfile', 'rb').and_return(tmp_bowerfile)
+    end
+
+    context 'when use_gem_deps_for_bowerfile is true' do
+      let(:gem1) { double(Gem::Specification, gem_dir: 'gem1') }
+      let(:gem1_bowerfile) { 'asset "jquery"' }
+      let(:gem2) { double(Gem::Specification, gem_dir: 'gem2') }
+
+      before do
+        BowerRails.use_gem_deps_for_bowerfile = true
+        allow(Gem::Specification).to receive(:map).and_yield(gem1).and_yield(gem2)
+        allow(File).to receive(:exist?).with('gem1/Bowerfile').and_return(true)
+        allow(File).to receive(:exist?).with('gem2/Bowerfile').and_return(false)
+        allow(File).to receive(:open).with('gem1/Bowerfile', 'rb').and_return(gem1_bowerfile)
+      end
+
+      it 'should also evaluate Bowerfile in dependency' do
+        dsl = BowerRails::Dsl.evalute('tmp', 'Bowerfile')
+        dependencies = dsl.dependencies['tmp/vendor/assets'][:dependencies]
+        expect(dependencies.count).to eq(2)
+        expect(dependencies).to have_key('jquery')
+        expect(dependencies).to have_key('moment')
+      end
+    end
+
+    context 'when use_gem_deps_for_bowerfile is false' do
+      it 'should evaluate Bowerfile in project' do
+        dsl = BowerRails::Dsl.evalute('tmp', 'Bowerfile')
+        dependencies = dsl.dependencies['tmp/vendor/assets'][:dependencies]
+        expect(dependencies.count).to eq(1)
+        expect(dependencies).to have_key('moment')
+      end
+    end
+  end
 end