make errored worker sandboxes more accessible

Author: prandla

cms/server/admin/templates/overview.html

@@ -151,10 +151,13 @@
 
 function link_submissions(s)
 {
-    return s.replace(/submission ([0-9]+)/g,
+    s = s.replace(/submission ([0-9]+)/g,
                      function (match, n, offset, string) {
                          return 'submission <a href="' + utils.url("submission", n) + '">' + n + '</a>';
                      });
+    s = s.replace(/sandbox\("([^"]+)", hash=([0-9a-f]+)\)/g,
+      function(match, path, hash) {return 'sandbox("<a href="' + utils.url("file", hash, "sandbox.tar.gz") + '">' + path + '</a>")'});
+    return s;
 }
 
 function escape_html(s)

cms/service/EvaluationService.py

@@ -475,9 +475,14 @@ def action_finished(self, data: dict, shard: int, error=None):
                 if job.success:
                     logger.info("`%s' succeeded.", operation)
                 else:
-                    logger.error("`%s' failed, see worker logs and (possibly) "
-                                 "sandboxes at '%s'.",
-                                 operation, " ".join(job.sandboxes))
+                    sboxes: list[str] = []
+                    for x in job.sandboxes:
+                        hash = job.sandbox_digests.get(x)
+                        if hash:
+                            sboxes.append(f'sandbox("{x}", hash={hash})')
+                        else:
+                            sboxes.append(f'sandbox("{x}")')
+                    logger.error(f"`{operation}' failed, see worker logs and (possibly) sandboxes: {' '.join(sboxes)}")
                 if isinstance(to_ignore, list) and operation in to_ignore:
                     logger.info("`%s' result ignored as requested", operation)
                 else: