[pbs-devel] [PATCH proxmox-backup v2] fix #4343: updated `view_task_result` to bail on task failure

[Gabriel Goller <g.goller@proxmox.com>]

Now we make an additional request on `api2/json/.../tasks/{upid}/status` to
get the `exitstatus` of the task. This allows us to `bail` and thus
get a non-zero exit code in the cli.

Signed-off-by: Gabriel Goller <g.goller@proxmox.com>
---

changes v1:
 - check on each iteration if the task is finished, then bubble up the 
   original error of the task. This was inpractical though, so we print
   the error and return a generic error.

 pbs-client/src/task_log.rs | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/pbs-client/src/task_log.rs b/pbs-client/src/task_log.rs
index 0bbb928d..a406a7a4 100644
--- a/pbs-client/src/task_log.rs
+++ b/pbs-client/src/task_log.rs
@@ -76,9 +76,8 @@ pub async fn display_task_log(
                 if n != start {
                     bail!("got wrong line number in response data ({n} != {start}");
                 }
-                if strip_date && t.len() > 27 && &t[25..27] == ": " {
-                    let line = &t[27..];
-                    println!("{line}");
+                if strip_date {
+                    println!("{}", try_strip_date(t));
                 } else {
                     println!("{t}");
                 }
@@ -96,6 +95,14 @@ pub async fn display_task_log(
             }
         }
 
+        let status_path = format!("api2/json/nodes/localhost/tasks/{upid_encoded}/status");
+        let status_result = client.get(&status_path, None).await?;
+        if status_result["data"]["status"].as_str() == Some("stopped")
+            && status_result["data"]["exitstatus"].as_str() != Some("OK")
+        {
+            bail!("task failed");
+        }
+
         Ok(())
     };
 
@@ -127,3 +134,11 @@ pub async fn view_task_result(
 
     Ok(())
 }
+
+fn try_strip_date(log_msg: &str) -> &str {
+    if log_msg.len() > 27 && &log_msg[25..27] == ": " {
+        &log_msg[27..]
+    } else {
+        log_msg
+    }
+}
-- 
2.39.2