Wrapper tasks for :assets-dependent Jasmine tasks

The :browse_jasmine_<system> and :phantomjs_jasmine_<system> tasks
depend on the :assets task, which needs to receive both :system and
:env arguments. Therefore, new tasks (:browse_jasmine and
:phantomjs_jasmine) are created that do take :system and :env args.
The old :browse_jasmine_<system> and :phantomjs_jasmine_<system>
tasks now wrap the new tasks, passing in <system> as an argument
and 'jasmine' (for :env, since it's hardcoded to 'jasmine' in
django_for_jasmine()).

rakefiles/jasmine.rake

@@ -73,21 +73,43 @@ def run_phantom_js(url)
     sh("#{phantomjs} node_modules/jasmine-reporters/test/phantomjs-testrunner.js #{url}")
 end
 
-[:lms, :cms].each do |system|
-    desc "Open jasmine tests for #{system} in your default browser"
-    task "browse_jasmine_#{system}" => :assets do
-        django_for_jasmine(system, true) do |jasmine_url|
+# Open jasmine tests for :system in the default browser. The :env
+# should (always?) be 'jasmine', but it's passed as an arg so that
+# the :assets dependency gets it.
+#
+# This task should be invoked via the wrapper below, so we don't
+# include a description to keep it from showing up in rake -T.
+task :browse_jasmine, [:system, :env] => :assets do |t, args|
+    django_for_jasmine(args.system, true) do |jasmine_url|
         Launchy.open(jasmine_url)
         puts "Press ENTER to terminate".red
         $stdin.gets
     end
-    end
+end
 
-    desc "Use phantomjs to run jasmine tests for #{system} from the console"
-    task "phantomjs_jasmine_#{system}" => :assets do
-        django_for_jasmine(system, false) do |jasmine_url|
+# Use phantomjs to run jasmine tests from the console. The :env
+# should (always?) be 'jasmine', but it's passed as an arg so that
+# the :assets dependency gets it.
+#
+# This task should be invoked via the wrapper below, so we don't
+# include a description to keep it from showing up in rake -T.
+task :phantomjs_jasmine, [:system, :env] => :assets do |t, args|
+    django_for_jasmine(args.system, false) do |jasmine_url|
         run_phantom_js(jasmine_url)
     end
+end
+
+# Wrapper tasks for the real browse_jasmine and phantomjs_jasmine
+# tasks above. These have a nicer UI since there's no arg passing.
+[:lms, :cms].each do |system|
+    desc "Open jasmine tests for #{system} in your default browser"
+    task "browse_jasmine_#{system}" do
+        task(:browse_jasmine).invoke(system, 'jasmine')
+    end
+
+    desc "Use phantomjs to run jasmine tests for #{system} from the console"
+    task "phantomjs_jasmine_#{system}" do
+        task(:phantomjs_jasmine).invoke(system, 'jasmine')
     end
 end