Apply auto-file-discovery to plugins

When AUTO_DISCOVER_STATIC_FILES enabled in a plugin dashboard,
static files including JavaScript files and static angular html
templates will be automatically discovered.

Change-Id: I7a88983f2604b71431b5b18c97a5c22c37961141
Partially-Implements: blueprint auto-js-file-finding

doc/source/topics/settings.rst

@@ -1218,6 +1218,23 @@ A list of scss files to be included in the compressed set of files that are
 loaded on every page. We recommend one scss file per dashboard, use @import if
 you need to include additional scss files for panels.
 
+``AUTO_DISCOVER_STATIC_FILES``
+------------------------------
+
+.. versionadded:: 2015.2(Liberty)
+
+If set to ``True``, JavaScript files and static angular html template files will be
+automatically discovered from the `static` folder in each apps listed in ADD_INSTALLED_APPS.
+
+JavaScript source files will be ordered based on naming convention: files with extension
+`.module.js` listed first, followed by other JavaScript source files.
+
+JavaScript files for testing will also be ordered based on naming convention: files with extension
+`.mock.js` listed first, followed by files with extension `.spec.js`.
+
+If ADD_JS_FILES and/or ADD_JS_SPEC_FILES are also specified, files manually listed there will be
+appended to the auto-discovered files.
+
 ``DISABLED``
 ------------
 

openstack_dashboard/enabled/_25_identity.py

@@ -24,15 +24,7 @@ ADD_ANGULAR_MODULES = [
     'hz.dashboard.identity',
 ]
 
-ADD_JS_FILES = [
-    'dashboard/identity/identity.module.js',
-    'dashboard/identity/users/users.module.js',
-]
-
-ADD_JS_SPEC_FILES = [
-    'dashboard/identity/identity.module.spec.js',
-    'dashboard/identity/users/users.module.spec.js',
-]
+AUTO_DISCOVER_STATIC_FILES = True
 
 ADD_SCSS_FILES = [
     'dashboard/identity/identity.scss'

openstack_dashboard/utils/settings.py

@@ -18,6 +18,8 @@ import pkgutil
 from django.utils import importlib
 import six
 
+from horizon.utils import file_discovery as fd
+
 
 def import_submodules(module):
     """Import all submodules and make them available in a dict."""
@@ -111,7 +113,16 @@ def update_dashboards(modules, horizon_config, installed_apps):
             if config.get('DASHBOARD'):
                 disabled_dashboards.append(config.get('DASHBOARD'))
             continue
-        apps.extend(config.get('ADD_INSTALLED_APPS', []))
+
+        _apps = config.get('ADD_INSTALLED_APPS', [])
+        apps.extend(_apps)
+
+        if config.get('AUTO_DISCOVER_STATIC_FILES', False):
+            for _app in _apps:
+                module = importlib.import_module(_app)
+                base_path = os.path.join(module.__path__[0], 'static/')
+                fd.populate_horizon_config(horizon_config, base_path)
+
         for category, exc_list in config.get('ADD_EXCEPTIONS', {}).iteritems():
             exceptions[category] = tuple(set(exceptions.get(category, ())
                                              + exc_list))