From 2d747212b08bfdf2f9b9cfb3cadd7e97638bb723 Mon Sep 17 00:00:00 2001
From: Graham Christensen <graham@grahamc.com>
Date: Thu, 11 Apr 2024 19:41:03 -0400
Subject: [PATCH] Use detsys_correlation if it is set

---
 magic-nix-cache/src/telemetry.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/magic-nix-cache/src/telemetry.rs b/magic-nix-cache/src/telemetry.rs
index a9c375e..c9dfc3e 100644
--- a/magic-nix-cache/src/telemetry.rs
+++ b/magic-nix-cache/src/telemetry.rs
@@ -45,7 +45,9 @@ impl Metric {
 impl TelemetryReport {
     pub fn new() -> TelemetryReport {
         TelemetryReport {
-            distinct_id: calculate_opaque_id().ok(),
+            distinct_id: env::var("DETSYS_CORRELATION")
+                .ok()
+                .or_else(|| calculate_opaque_id().ok()),
 
             version: env!("CARGO_PKG_VERSION").to_string(),
             is_ci: is_ci::cached(),