Expose Rails.application.assets_manifest

Author: josh

CHANGELOG.md

@@ -1,3 +1,9 @@
+### 2.3.0
+
+*   Expose Rails.application.assets_manifest
+
+    *Joshua Peek*
+
 ### 2.2.0
 
 *   Support Sprockets 2.8 through 3.x.

lib/sprockets/railtie.rb

@@ -32,6 +32,9 @@ def assets
       end
     end
     attr_writer :assets
+
+    # Returns Sprockets::Manifest for app config.
+    attr_accessor :assets_manifest
   end
 end
 
@@ -66,8 +69,6 @@ def configure(&block)
     config.after_initialize do |app|
       config = app.config
 
-      manifest_assets_path = File.join(config.paths['public'].first, config.assets.prefix)
-
       # Configuration options that should invalidate
       # the Sprockets cache when changed.
       app.assets.version = [
@@ -83,28 +84,6 @@ def configure(&block)
         app.assets.append_path path
       end
 
-      ActiveSupport.on_load(:action_view) do
-        include Sprockets::Rails::Helper
-
-        # Copy relevant config to AV context
-        self.debug_assets  = config.assets.debug
-        self.digest_assets = config.assets.digest
-        self.assets_prefix = config.assets.prefix
-
-        # Copy over to Sprockets as well
-        context = app.assets.context_class
-        context.assets_prefix = config.assets.prefix
-        context.digest_assets = config.assets.digest
-        context.config        = config.action_controller
-
-        if config.assets.compile
-          self.assets_environment = app.assets
-          self.assets_manifest    = Sprockets::Manifest.new(app.assets, manifest_assets_path, config.assets.manifest)
-        else
-          self.assets_manifest = Sprockets::Manifest.new(manifest_assets_path, config.assets.manifest)
-        end
-      end
-
       app.assets.js_compressor  = config.assets.js_compressor
       app.assets.css_compressor = config.assets.css_compressor
 
@@ -121,6 +100,30 @@ def configure(&block)
         app.assets = app.assets.index
       end
 
+      manifest_assets_path = File.join(config.paths['public'].first, config.assets.prefix)
+      if config.assets.compile
+        app.assets_manifest = Sprockets::Manifest.new(app.assets, manifest_assets_path, config.assets.manifest)
+      else
+        app.assets_manifest = Sprockets::Manifest.new(manifest_assets_path, config.assets.manifest)
+      end
+
+      ActiveSupport.on_load(:action_view) do
+        include Sprockets::Rails::Helper
+
+        # Copy relevant config to AV context
+        self.debug_assets  = config.assets.debug
+        self.digest_assets = config.assets.digest
+        self.assets_prefix = config.assets.prefix
+
+        # Copy over to Sprockets as well
+        context = app.assets.context_class
+        context.assets_prefix = config.assets.prefix
+        context.digest_assets = config.assets.digest
+        context.config        = config.action_controller
+
+        self.assets_environment = app.assets if config.assets.compile
+        self.assets_manifest = app.assets_manifest
+      end
 
       Sprockets::Rails::Helper.precompile         ||= app.config.assets.precompile
       Sprockets::Rails::Helper.assets             ||= app.assets

test/test_railtie.rb

@@ -66,6 +66,16 @@ def test_app_asset_available_when_compile
     assert env = app.assets
   end
 
+  def test_app_asset_manifest_available_when_compile
+    assert_equal true, app.config.assets.compile
+
+    app.initialize!
+
+    assert manifest = app.assets_manifest
+    assert_equal app.assets, manifest.environment
+    assert_equal File.join(ROOT, "public/assets"), manifest.directory
+  end
+
   def test_app_asset_available_when_no_compile
     app.configure do
       config.assets.compile = false
@@ -78,6 +88,20 @@ def test_app_asset_available_when_no_compile
     assert env = app.assets
   end
 
+  def test_app_asset_manifest_available_when_no_compile
+    app.configure do
+      config.assets.compile = false
+    end
+
+    assert_equal false, app.config.assets.compile
+
+    app.initialize!
+
+    assert manifest = app.assets_manifest
+    refute manifest.environment
+    assert_equal File.join(ROOT, "public/assets"), manifest.directory
+  end
+
   def test_copies_paths
     app.configure do
       config.assets.paths << "javascripts"
@@ -176,7 +200,7 @@ def test_action_view_helper
     assert_equal false, ActionView::Base.digest_assets
     assert_equal "/assets", ActionView::Base.assets_prefix
     assert_equal app.assets, ActionView::Base.assets_environment
-    assert_match %r{public/assets/manifest-.*.json}, ActionView::Base.assets_manifest.path
+    assert_equal app.assets_manifest, ActionView::Base.assets_manifest
 
     @view = ActionView::Base.new
     assert_equal "/javascripts/xmlhr.js", @view.javascript_path("xmlhr")
@@ -198,8 +222,9 @@ def test_manifest_path
     end
     app.initialize!
 
-    assert_match %r{config/foo/bar\.json$}, ActionView::Base.assets_manifest.path
-    assert_match %r{public/assets$}, ActionView::Base.assets_manifest.dir
+    assert manifest = app.assets_manifest
+    assert_match %r{config/foo/bar\.json$}, manifest.path
+    assert_match %r{public/assets$}, manifest.dir
   end
 
   def test_manifest_path_respects_rails_public_path
@@ -209,8 +234,9 @@ def test_manifest_path_respects_rails_public_path
       end
       app.initialize!
 
-      assert_match %r{test_public/assets/manifest-.*\.json$}, ActionView::Base.assets_manifest.path
-      assert_match %r{test_public/assets$}, ActionView::Base.assets_manifest.dir
+      assert manifest = app.assets_manifest
+      assert_match %r{test_public/assets/manifest-.*\.json$}, manifest.path
+      assert_match %r{test_public/assets$}, manifest.dir
     end
   end
 end