Drop support for restoring backup archives from prior to 3.8

locales/en.json

@@ -528,6 +528,7 @@
     "restore_already_installed_app": "An app with the ID '{app:s}' is already installed",
     "restore_already_installed_apps": "The following apps can't be restored because they are already installed: {apps}",
     "restore_app_failed": "Could not restore {app:s}",
+    "restore_backup_too_old": "This backup archive can not be restored because it comes from a too-old YunoHost version.",
     "restore_cleaning_failed": "Could not clean up the temporary restoration directory",
     "restore_complete": "Restoration completed",
     "restore_confirm_yunohost_installed": "Do you really want to restore an already installed system? [{answers:s}]",

src/yunohost/backup.py

@@ -36,6 +36,7 @@ from datetime import datetime
 from glob import glob
 from collections import OrderedDict
 from functools import reduce
+from packaging import version
 
 from moulinette import msignals, m18n, msettings
 from moulinette.utils import filesystem
@@ -858,6 +859,9 @@ class RestoreManager:
         # FIXME this way to get the info is not compatible with copy or custom
         # backup methods
         self.info = backup_info(name, with_details=True)
+        if not self.info["from_yunohost_version"] or version.parse(self.info["from_yunohost_version"]) < version.parse("3.8.0"):
+            raise YunohostValidationError("restore_backup_too_old")
+
         self.archive_path = self.info["path"]
         self.name = name
         self.method = BackupMethod.create(method, self)
@@ -2530,6 +2534,7 @@ def backup_info(name, with_details=False, human_readable=False):
 
         result["apps"] = info["apps"]
         result["system"] = info[system_key]
+        result["from_yunohost_version"] = info.get("from_yunohost_version")
     return result