[pbs-devel] [PATCH proxmox-backup v6 2/2] close #4763: client: add command to forget backup group

[Gabriel Goller]

Add the command `proxmox-backup-client group forget <group>` so
that we can forget (delete) whole groups with all the containing
snapshots.
To avoid printing full datastore paths (which are in the error messages)
we filter out the most common one (group not found) and rephrase it.

Signed-off-by: Gabriel Goller <g.goller at proxmox.com>
---
 proxmox-backup-client/src/group.rs | 88 ++++++++++++++++++++++++++++++
 proxmox-backup-client/src/main.rs  |  3 +
 2 files changed, 91 insertions(+)
 create mode 100644 proxmox-backup-client/src/group.rs

diff --git a/proxmox-backup-client/src/group.rs b/proxmox-backup-client/src/group.rs
new file mode 100644
index 00000000..8a2a4e1e
--- /dev/null
+++ b/proxmox-backup-client/src/group.rs
@@ -0,0 +1,88 @@
+use anyhow::{bail, Error};
+use serde_json::Value;
+
+use proxmox_router::cli::{CliCommand, CliCommandMap, Confirmation};
+use proxmox_schema::api;
+
+use crate::{
+    complete_backup_group, complete_namespace, complete_repository, merge_group_into,
+    REPO_URL_SCHEMA,
+};
+use pbs_api_types::{BackupGroup, BackupNamespace};
+use pbs_client::tools::{connect, extract_repository_from_value};
+
+pub fn group_mgmt_cli() -> CliCommandMap {
+    CliCommandMap::new().insert(
+        "forget",
+        CliCommand::new(&API_METHOD_FORGET_GROUP)
+            .arg_param(&["group"])
+            .completion_cb("ns", complete_namespace)
+            .completion_cb("repository", complete_repository)
+            .completion_cb("group", complete_backup_group),
+    )
+}
+
+#[api(
+    input: {
+        properties: {
+            group: {
+                type: String,
+                description: "Backup group",
+            },
+            repository: {
+                schema: REPO_URL_SCHEMA,
+                optional: true,
+            },
+            ns: {
+                type: BackupNamespace,
+                optional: true,
+            },
+        }
+    }
+)]
+/// Forget (remove) backup snapshots.
+async fn forget_group(group: String, param: Value) -> Result<Value, Error> {
+    let backup_group: BackupGroup = group.parse()?;
+    let repo = extract_repository_from_value(&param)?;
+    let client = connect(&repo)?;
+
+    let mut api_params = param;
+    merge_group_into(api_params.as_object_mut().unwrap(), backup_group.clone());
+
+    let path = format!("api2/json/admin/datastore/{}/snapshots", repo.store());
+    let result = client.get(&path, Some(api_params.clone())).await?;
+    let snapshots = result["data"].as_array().unwrap().len();
+
+    let confirmation = Confirmation::query_with_default(
+        format!(
+            "Delete group \"{}\" with {} snapshot(s)?",
+            backup_group, snapshots
+        )
+        .as_str(),
+        Confirmation::No,
+    )?;
+    if confirmation.is_yes() {
+        let path = format!("api2/json/admin/datastore/{}/groups", repo.store());
+        if let Err(err) = client.delete(&path, Some(api_params)).await {
+            // "ENOENT: No such file or directory" is part of the error returned when the group
+            // has not been found. The full error contains the full datastore path and we would
+            // like to avoid printing that to the console. Checking if it exists before deleting
+            // the group doesn't work because we currently do not differentiate between an empty
+            // and a nonexistent group. This would make it impossible to remove empty groups.
+            if err
+                .root_cause()
+                .to_string()
+                .contains("ENOENT: No such file or directory")
+            {
+                bail!("Unable to find backup group!");
+            } else {
+                bail!(err);
+            }
+        }
+        println!("Successfully deleted group!");
+    } else {
+        println!("Abort.");
+    }
+
+    Ok(Value::Null)
+}
diff --git a/proxmox-backup-client/src/main.rs b/proxmox-backup-client/src/main.rs
index 9dbd3cd1..63669c59 100644
--- a/proxmox-backup-client/src/main.rs
+++ b/proxmox-backup-client/src/main.rs
@@ -72,6 +72,8 @@ mod catalog;
 pub use catalog::*;
 mod snapshot;
 pub use snapshot::*;
+mod group;
+pub use group::*;
 pub mod key;
 pub mod namespace;
 
@@ -1792,6 +1794,7 @@ fn main() {
         .insert("benchmark", benchmark_cmd_def)
         .insert("change-owner", change_owner_cmd_def)
         .insert("namespace", namespace::cli_map())
+        .insert("group", group_mgmt_cli())
         .alias(&["files"], &["snapshot", "files"])
         .alias(&["forget"], &["snapshot", "forget"])
         .alias(&["upload-log"], &["snapshot", "upload-log"])
-- 
2.43.0