feat(devops): Feature Flagging management command

ref: #675 #575

.vscode/launch.json

@@ -4,6 +4,7 @@
     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
     "version": "0.2.0",
     "configurations": [
+
         {
             "name": "Centurion",
             "type": "debugpy",
@@ -40,6 +41,19 @@
                 "PROMETHEUS_MULTIPROC_DIR": ""
             }
         },
+        {
+            "name": "Centurion Feature Flag (Management Command)",
+            "type": "debugpy",
+            "request": "launch",
+            "args": [
+                "feature_flag",
+                // "0.0.0.0:8002"
+            ],
+            "django": true,
+            "autoStartBrowser": false,
+            "program": "${workspaceFolder}/app/manage.py"
+        },
+        
         {
             "name": "Migrate",
             "type": "debugpy",

app/centurion_feature_flag/management/commands/feature_flag.py

@@ -0,0 +1,70 @@
+import subprocess
+
+from django.core.management.base import BaseCommand
+
+from app import settings
+
+from centurion_feature_flag.lib.feature_flag import CenturionFeatureFlagging
+
+
+
+class Command(BaseCommand):
+    help = 'Running this command will download the available feature flags form the Centurion Server if the cache has expired (>4hours) or the cache file does not exist.'
+
+
+    def add_arguments(self, parser):
+        parser.add_argument('-r', '--reload', action='store_true', help='Restart the Centurion Process')
+
+
+    def handle(self, *args, **kwargs):
+
+        if getattr(settings,'feature_flag', None):
+
+            feature_flagging = CenturionFeatureFlagging(
+                url = settings.feature_flag['url'],
+                user_agent = settings.feature_flag['user_agent'],
+                cache_dir = settings.feature_flag['cache_dir']
+            )
+
+            self.stdout.write('Fetching Feature Flags.....')
+
+            feature_flagging.get()
+
+            if feature_flagging:
+
+                self.stdout.write('Success.')
+
+            else:
+
+                self.stdout.stderr('Error. Something went wrong.')
+
+            if kwargs['reload']:
+
+                if settings.BUILD_SHA:
+
+                    self.stdout.write('restarting Centurion')
+
+                    restart = subprocess.run(["supervisorctl", "restart", "gunicorn"], capture_output = True)
+
+                    status = subprocess.run(["supervisorctl", "status", "gunicorn"], capture_output = True)
+
+                    if status.returncode == 0:
+
+                        self.stdout.write('Centurion restarted successfully')
+
+
+
+                    a = 'b'
+
+                else:
+
+                    self.stdout.write('using kwarg `--reload` whilst not within production does nothing.')
+
+        else:
+
+            self.stdout.write('Feature Flaggin is not enabled')
+
+
+
+
+