Expose config and translator via toolkit.

To avoid importing of pylons in extensions, we should include the most
commonly imported pylons modules in the plugin toolkit.

This PR does that in order to fix #2776

ckan/plugins/toolkit.py

@@ -20,6 +20,8 @@ class _Toolkit(object):
         '_',                    # i18n translation
         'ungettext',            # i18n translation (plural forms)
         'c',                    # template context
+        'config',                 # The pylons configuration
+        'translator',             # Pylons translator, often used in plugins when create commands
         'request',              # http request object
         'render',               # template render function
         'render_text',          # Genshi NewTextTemplate render function
@@ -138,6 +140,20 @@ def _initialize(self):
 current request.
 
 '''
+        t['config'] = pylons.config
+        self.docstring_overrides['config'] = '''The Pylons configuration object.
+
+The configuration object containing information about this request as well as
+options loaded from the .ini file.
+'''
+
+        t['translator'] = pylons.translator
+        self.docstring_overrides['translator'] = '''The Pylons translator object.
+
+Often used in extensions within commands or migrations for setting up the
+CKAN i18n translator.
+'''
+
         t['request'] = common.request
         self.docstring_overrides['request'] = '''The Pylons request object.
 

ckan/tests/lib/test_toolkit.py

@@ -0,0 +1,19 @@
+import ckan.tests.helpers as helpers
+
+from nose.tools import assert_equals, assert_not_equals
+import ckan.plugins.toolkit as t
+from pylons import config
+from pylons import translator
+
+class TestToolkit(helpers.FunctionalTestBase):
+
+    def test_config_is_in_toolkit(self):
+        assert sorted(t.config.keys()) == sorted(config.keys())
+
+    def test_config_values_are_accurate(self):
+        for k, v in t.config.iteritems():
+            assert config[k] == v
+
+    def test_translator(self):
+        assert translator.gettext("Test") == \
+            t.translator.gettext("Test")