Control backup count (#13025)

Enable control of how many historical backup entries to keep when running invoke backup --clean

src/backend/InvenTree/InvenTree/backup.py

@@ -122,6 +122,16 @@ def backup_date_format() -> str:
     )
 
 
+def backup_keep_count() -> int:
+    """Return the number of backup files to keep."""
+    return InvenTree.config.get_setting(
+        'INVENTREE_BACKUP_KEEP_COUNT',
+        'backup_keep_count',
+        default_value=10,
+        typecast=int,
+    )
+
+
 def backup_filename_template() -> str:
     """Return the filename template for database backups."""
     return InvenTree.config.get_setting(

src/backend/InvenTree/InvenTree/settings.py

@@ -270,6 +270,9 @@ DBBACKUP_DATE_FORMAT = InvenTree.backup.backup_date_format()
 DBBACKUP_FILENAME_TEMPLATE = InvenTree.backup.backup_filename_template()
 DBBACKUP_MEDIA_FILENAME_TEMPLATE = InvenTree.backup.backup_media_filename_template()
 
+# How many backup files to keep
+DBBACKUP_CLEANUP_KEEP = InvenTree.backup.backup_keep_count()
+
 DBBACKUP_GPG_RECIPIENT = InvenTree.backup.backup_gpg_recipient()
 
 DBBACKUP_SEND_EMAIL = InvenTree.backup.backup_email_on_error()