From 35efdddbdc42816a70af87592f9f5fdcbc0a250b Mon Sep 17 00:00:00 2001
From: "Genevieve (Genna) Helsel" <helsel@meta.com>
Date: Mon, 27 Jan 2025 16:51:39 -0800
Subject: [PATCH] bug fix: add sandcastle_alias in file access events

Reviewed By: jdelliot

Differential Revision: D68737319

fbshipit-source-id: 6b01849ca0465dfbefcd93fc0424460ba09d1c2b
---
 eden/fs/telemetry/LogEvent.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/eden/fs/telemetry/LogEvent.h b/eden/fs/telemetry/LogEvent.h
index 74c4ac045c6c5..0c76399fc1bf5 100644
--- a/eden/fs/telemetry/LogEvent.h
+++ b/eden/fs/telemetry/LogEvent.h
@@ -750,6 +750,12 @@ struct FileAccessEvent : public EdenFSFileAccessEvent {
     event.addString("filename", filename);
     event.addString("source", source);
     event.addString("source_detail", source_detail);
+
+    if (auto alias = std::getenv("SANDCASTLE_ALIAS")) {
+      // Log the Sandcastle job alias if set. If we decide to use predictive
+      // prefetch profiles on sandcastle, we will want the sandcastle alias.
+      event.addString("sandcastle_alias", alias);
+    }
   }
 };