From 20a74e787f29c8ac3bbbecdc34c1487423d7b163 Mon Sep 17 00:00:00 2001
From: mdecimus <mauro@stalw.art>
Date: Tue, 23 Apr 2024 19:55:19 +0200
Subject: [PATCH] Allow only one journald tracer (closes #375)

---
 crates/common/src/config/tracers.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/crates/common/src/config/tracers.rs b/crates/common/src/config/tracers.rs
index fa390dcf..af24f076 100644
--- a/crates/common/src/config/tracers.rs
+++ b/crates/common/src/config/tracers.rs
@@ -165,7 +165,14 @@ impl Tracers {
                     }
                 }
                 "journal" => {
-                    tracers.push(Tracer::Journal { level });
+                    if !tracers.iter().any(|t| matches!(t, Tracer::Journal { .. })) {
+                        tracers.push(Tracer::Journal { level });
+                    } else {
+                        config.new_build_error(
+                            ("tracer", id, "type"),
+                            "Only one journal tracer is allowed".to_string(),
+                        );
+                    }
                 }
                 unknown => {
                     config.new_parse_error(