make a backup before upgrade

+ add no_backup flag
+ add keep_maintenance_mode internal flag

models.py

@@ -9,6 +9,7 @@ import shutil
 from colorama import Fore, Style
 from pathlib import Path
 from utils import _print
+import utils
 
 
 class Container:
@@ -198,7 +199,8 @@ class Container:
             return False
 
     # Disable Nextcloud maintenance mode
-    def __disable_maintenance_mode(self):
+    def __disable_maintenance_mode(self) -> bool:
+        if not utils.keep_maintenance_mode:
             try:
                 disable_maintenance_mode = check_output(
                     ["docker", "exec", "--user", "www-data", self.app_container, "php", "occ", "maintenance:mode", "--off"])
@@ -213,6 +215,8 @@ class Container:
                 self.exceptions.update({'__disable_maintenance_mode': traceback.format_exc()})
                 _print(F"Disable Nextcloud maintenance mode: {self.FAILED}")
                 return False
+        else:
+            return True
 
     # Pull new docker images
     def __pull_images(self):

upgrade.py

@@ -10,6 +10,7 @@ import utils
 from utils import _print
 from models import Container
 from models import Log
+import backup
 
 
 def upgrade():
@@ -35,7 +36,15 @@ def upgrade():
         container: Container
         for container in containers.values():
 
-            # Start backup
+            go_on = True
+            # Make a backup
+            if not utils.no_backup:
+                utils.keep_maintenance_mode = True
+                go_on = backup.backup()
+
+            if go_on:
+                # Make the upgrade
+                utils.keep_maintenance_mode = True if "--maintenance" in sys.argv else False
                 _print("----------------------------------------------")
                 _print(F"Start upgrade for {container.name} at {datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')}")
                 result = container.upgrade()

utils.py

@@ -4,7 +4,10 @@ no_log = False
 no_cleanup = False
 all_containers = False
 no_confirm = False
+no_backup = False
 
+# intern Flags
+keep_maintenance_mode = False
 
 
 def set_flags(flags=list):
@@ -20,6 +23,7 @@ def set_flags(flags=list):
     all_containers = "--all" in flags
     no_cleanup = "--nocleanup" in flags
     no_confirm = "--yes" in flags
+    no_backup = "--nobackup" in flags
 
 
 def _print(text=None):