Add config for "global" help URL

tailbone/config.py

@@ -53,9 +53,15 @@ class ConfigExtension(BaseExtension):
         config.setdefault('tailbone', 'themes.expose_picker', 'true')
 
 
+def global_help_url(config):
+    return config.get('tailbone', 'global_help_url')
+
+
 def legacy_mobile_enabled(config):
     return config.getbool('tailbone', 'legacy_mobile.enabled',
                           default=True)
 
+
 def protected_usernames(config):
     return config.getlist('tailbone', 'protected_usernames')
+

tailbone/views/common.py

@@ -44,6 +44,7 @@ from tailbone.forms.common import Feedback
 from tailbone.db import Session
 from tailbone.views import View
 from tailbone.util import set_app_theme
+from tailbone.config import global_help_url
 
 
 class CommonView(View):
@@ -69,6 +70,7 @@ class CommonView(View):
         context = {
             'image_url': image_url,
             'use_buefy': self.get_use_buefy(),
+            'help_url': global_help_url(self.rattail_config),
         }
 
         if self.expose_quickie_search:

tailbone/views/master.py

@@ -58,6 +58,7 @@ from webhelpers2.html import HTML, tags
 
 from tailbone import forms, grids, diffs
 from tailbone.views import View
+from tailbone.config import global_help_url
 
 
 log = logging.getLogger(__name__)
@@ -2318,8 +2319,11 @@ class MasterView(View):
         so if you like you can return a different help URL depending on which
         type of CRUD view is in effect, etc.
         """
+        if self.help_url:
             return self.help_url
 
+        return global_help_url(self.rattail_config)
+
     def render_to_response(self, template, data, mobile=False):
         """
         Return a response with the given template rendered with the given data.