From 503896af54d6eacd685873488494e6f14067a2de Mon Sep 17 00:00:00 2001
From: Martin Atkins <mart@degeneration.co.uk>
Date: Mon, 10 Jul 2023 11:57:52 -0700
Subject: [PATCH] main: Be explicit that OTEL_TRACES_EXPORTER is very
 experimental

---
 telemetry.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/telemetry.go b/telemetry.go
index 95babb2b6a..a4a8afdb60 100644
--- a/telemetry.go
+++ b/telemetry.go
@@ -14,6 +14,15 @@ import (
 	"go.opentelemetry.io/otel/trace"
 )
 
+// If this environment variable is set to "otlp" when running Terraform CLI
+// then we'll enable an experimental OTLP trace exporter.
+//
+// BEWARE! This is not a committed external interface.
+//
+// Everything about this is experimental and subject to change in future
+// releases. Do not depend on anything about the structure of this output.
+// This mechanism might be removed altogether if a different strategy seems
+// better based on experience with this experiment.
 const openTelemetryExporterEnvVar = "OTEL_TRACES_EXPORTER"
 
 // tracer is the OpenTelemetry tracer to use for traces in package main only.