Stub assets:environment task

Author: josh

README.md

@@ -44,6 +44,8 @@ Sprockets::Rails::Task.new do |t|
 end
 ```
 
+Each asset task will invoke `assets:environment` first. By default this loads the Rails environment. You can override this task to add or remove dependencies for your specific compilation environment.
+
 Also see [Sprockest::Rails::Task](https://github.com/josh/sprockets-rails/blob/master/lib/sprockets/rails/task.rb) and [Rake::SprocketsTask](https://github.com/sstephenson/sprockets/blob/master/lib/rake/sprocketstask.rb).
 
 

lib/sprockets/rails/task.rb

@@ -9,6 +9,13 @@ class Task < Rake::SprocketsTask
 
       def define
         namespace :assets do
+          # Override this task change the loaded dependencies
+          desc "Load asset compile environment"
+          task :environment do
+            # Load full Rails environment by default
+            Rake::Task['environment'].invoke
+          end
+
           desc "Compile all the assets named in config.assets.precompile"
           task :precompile => :environment do
             with_logger do

test/test_task.rb

@@ -18,8 +18,10 @@ def setup
 
     @manifest = Sprockets::Manifest.new(@assets, @dir)
 
+    @environment_ran = false
     # Stub Rails environment task
     @rake.define_task Rake::Task, :environment do
+      @environment_ran = true
     end
 
     Sprockets::Rails::Task.new do |t|
@@ -38,31 +40,40 @@ def teardown
   end
 
   def test_precompile
+    assert !@environment_ran
+
     digest_path = @assets['foo.js'].digest_path
     assert !File.exist?("#{@dir}/#{digest_path}")
 
     @rake['assets:precompile'].invoke
 
+    assert @environment_ran
     assert Dir["#{@dir}/manifest-*.json"].first
     assert File.exist?("#{@dir}/#{digest_path}")
   end
 
   def test_clobber
+    assert !@environment_ran
     digest_path = @assets['foo.js'].digest_path
 
     @rake['assets:precompile'].invoke
     assert File.exist?("#{@dir}/#{digest_path}")
 
+    assert @environment_ran
+
     @rake['assets:clobber'].invoke
     assert !File.exist?("#{@dir}/#{digest_path}")
   end
 
   def test_clean
+    assert !@environment_ran
     digest_path = @assets['foo.js'].digest_path
 
     @rake['assets:precompile'].invoke
     assert File.exist?("#{@dir}/#{digest_path}")
 
+    assert @environment_ran
+
     @rake['assets:clean'].invoke
     assert File.exist?("#{@dir}/#{digest_path}")
   end