[pbs-devel] [PATCH proxmox-backup] fix #3336: api: remove backup group if the last snapshot is removed

[Stefan Sterz <s.sterz@proxmox.com>]

Signed-off-by: Stefan Sterz <s.sterz@proxmox.com>
---
 pbs-datastore/src/datastore.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/pbs-datastore/src/datastore.rs b/pbs-datastore/src/datastore.rs
index d416c8d8..623b7688 100644
--- a/pbs-datastore/src/datastore.rs
+++ b/pbs-datastore/src/datastore.rs
@@ -346,6 +346,28 @@ impl DataStore {
                 )
             })?;
 
+        // check if this was the last snapshot and if so remove the group
+        if backup_dir
+            .group()
+            .list_backups(&self.base_path())?
+            .is_empty()
+        {
+            let group_path = self.group_path(backup_dir.group());
+            let _guard = proxmox_sys::fs::lock_dir_noblock(
+                &group_path,
+                "backup group",
+                "possible running backup",
+            )?;
+
+            std::fs::remove_dir_all(&group_path).map_err(|err| {
+                format_err!(
+                    "removing backup group directory {:?} failed - {}",
+                    group_path,
+                    err,
+                )
+            })?;
+        }
+
         // the manifest does not exists anymore, we do not need to keep the lock
         if let Ok(path) = self.manifest_lock_path(backup_dir) {
             // ignore errors
-- 
2.30.2