Add YAML env variables support to platform app

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

HISTORY.rst

@@ -18,12 +18,16 @@
   nested dictionaries in the configuration. Requires manual
   update of existing config.yml files.
 - Support user specified locations for the configuration file with the
-  CONFIGURATION_FILEPATH (MAYAN_CONFIGURATION_FILEPATH environment variable), and
+  CONFIGURATION_FILEPATH (MAYAN_CONFIGURATION_FILEPATH environment variable),
-  CONFIGURATION_LAST_GOOD_FILEPATH
+  and CONFIGURATION_LAST_GOOD_FILEPATH
   (MAYAN_CONFIGURATION_LAST_GOOD_FILEPATH environment variable) settings.
-- Move bootstrapped settings code to their own module in the smart_settings apps.
+- Move bootstrapped settings code to their own module in the smart_settings
-- Remove individual database configuration options. All database configuration
+  apps.
-  is now done using MAYAN_DATABASES to mirror Django way of doing database setup.
+- Remove individual database configuration options. All database
+  configuration is now done using MAYAN_DATABASES to mirror Django way of
+  doing atabase etup.
+- Added support for YAML encoded environment variables to the platform
+  templates apps.
 
 3.2.5 (2019-07-05)
 ==================

docs/releases/3.3.rst

@@ -36,6 +36,8 @@ Changes
 - Move bootstrapped settings code to their own module in the smart_settings apps.
 - Remove individual database configuration options. All database configuration
   is now done using MAYAN_DATABASES to mirror Django way of doing database setup.
+- Added support for YAML encoded environment variables to the platform 
+  templates apps.
 
 Removals
 --------

mayan/apps/platform/classes.py

@@ -4,11 +4,12 @@ import os
 
 import yaml
 try:
-    from yaml import CSafeLoader as SafeLoader
+    from yaml import CSafeLoader as SafeLoader, CSafeDumper as SafeDumper
 except ImportError:
-    from yaml import SafeLoader
+    from yaml import SafeLoader, SafeDumper
 
 from django.template import loader
+from django.utils.html import mark_safe
 from django.utils.encoding import force_text, python_2_unicode_compatible
 from django.utils.translation import ugettext_lazy as _
 
@@ -24,9 +25,25 @@ class Variable(object):
         self.default = default
         self.environment_name = environment_name
 
-    def get_value(self):
+    def _get_value(self):
         return os.environ.get(self.environment_name, self.default)
 
+    def get_value(self):
+        return mark_safe(self._get_value())
+
+
+class YAMLVariable(Variable):
+    def _get_value(self):
+        value = os.environ.get(self.environment_name)
+        if value:
+            value = yaml.load(stream=value, Loader=SafeLoader)
+        else:
+            value = self.default
+
+        return yaml.dump(
+            data=value, allow_unicode=True, default_flow_style=True, width=999, Dumper=SafeDumper
+        ).replace('...\n', '').replace('\n', '')
+
 
 @python_2_unicode_compatible
 class PlatformTemplate(object):
@@ -106,10 +123,6 @@ class PlatformTemplate(object):
 
 
 class PlatformTemplateSupervisord(PlatformTemplate):
-    context_defaults = {
-        'BROKER_URL': 'redis://127.0.0.1:6379/0',
-        'CELERY_RESULT_BACKEND': 'redis://127.0.0.1:6379/0',
-    }
     label = _('Template for Supervisord.')
     name = 'supervisord'
     settings = (
@@ -124,16 +137,32 @@ class PlatformTemplateSupervisord(PlatformTemplate):
             name='GUNICORN_TIMEOUT', default=120,
             environment_name='MAYAN_GUNICORN_TIMEOUT'
         ),
-        Variable(
-            name='DATABASES',
-            default="{'default':{'ENGINE':'django.db.backends.postgresql','NAME':'mayan','PASSWORD':'mayanuserpass','USER':'mayan','HOST':'127.0.0.1'}}",
-            environment_name='MAYAN_DATABASES'
-        ),
         Variable(
             name='INSTALLATION_PATH', default='/opt/mayan-edms',
             environment_name='MAYAN_INSTALLATION_PATH'
         ),
-        Variable(
+        YAMLVariable(
+            name='ALLOWED_HOSTS',
+            default=['*'],
+            environment_name='MAYAN_ALLOWED_HOSTS'
+        ),
+        YAMLVariable(
+            name='BROKER_URL',
+            default='redis://127.0.0.1:6379/0',
+            environment_name='MAYAN_BROKER_URL'
+        ),
+        YAMLVariable(
+            name='CELERY_RESULT_BACKEND',
+            default='redis://127.0.0.1:6379/0',
+            environment_name='MAYAN_CELERY_RESULT_BACKEND'
+        ),
+        YAMLVariable(
+            name='DATABASES',
+            default={'default':{'ENGINE':'django.db.backends.postgresql','NAME':'mayan','PASSWORD':'mayanuserpass','USER':'mayan','HOST':'127.0.0.1'}},
+            environment_name='MAYAN_DATABASES'
+        ),
+        YAMLVariable
+        (
             name='MEDIA_ROOT', default='/opt/mayan-edms/media',
             environment_name='MAYAN_MEDIA_ROOT'
         ),

mayan/apps/platform/templates/platform/supervisord.tmpl

@@ -1,17 +1,12 @@
 [supervisord]
 environment=
-    MAYAN_ALLOWED_HOSTS='["*"]',  # Allow access to other network hosts other than localhost
+    PYTHONPATH={{ INSTALLATION_PATH }}/lib/python2.7/site-packages:{{ MEDIA_ROOT }}/mayan_settings,
+    DJANGO_SETTINGS_MODULE=mayan.settings.production,
+    MAYAN_MEDIA_ROOT="{{ MEDIA_ROOT }}",
+    MAYAN_ALLOWED_HOSTS="{{ ALLOWED_HOSTS }}",
     MAYAN_CELERY_RESULT_BACKEND="{{ CELERY_RESULT_BACKEND }}",
     MAYAN_BROKER_URL="{{ BROKER_URL }}",
-    PYTHONPATH={{ INSTALLATION_PATH }}/lib/python2.7/site-packages:{{ MEDIA_ROOT }}/mayan_settings,
+    MAYAN_DATABASES="{{ DATABASES }}"
-    MAYAN_MEDIA_ROOT={{ MEDIA_ROOT }},
-    MAYAN_DATABASE_ENGINE={{ DATABASE_ENGINE }},
-    MAYAN_DATABASE_HOST={{ DATABASE_HOST }},
-    MAYAN_DATABASE_NAME={{ DATABASE_NAME }},
-    MAYAN_DATABASE_PASSWORD={{ DATABASE_PASSWORD }},
-    MAYAN_DATABASE_USER={{ DATABASE_USER }},
-    MAYAN_DATABASE_CONN_MAX_AGE={{ DATABASE_CONN_MAX_AGE }},
-    DJANGO_SETTINGS_MODULE=mayan.settings.production
 
 [program:mayan-gunicorn]
 autorestart = true