From 1db533b21fcefa04d1eb401b7a059eab75497771 Mon Sep 17 00:00:00 2001
From: Nicholas Berlin <nicholas.berlin@elastic.co>
Date: Tue, 3 Dec 2024 10:57:56 -0500
Subject: [PATCH] Initialize the interval trigger

Without lastRotate initialized an interval trigger
will always trigger a rotation the first time its
callback is executed.
---
 file/rotator_test.go | 2 +-
 file/trigger.go      | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/file/rotator_test.go b/file/rotator_test.go
index 74a58960..8719b273 100644
--- a/file/rotator_test.go
+++ b/file/rotator_test.go
@@ -173,7 +173,7 @@ func TestDailyRotation(t *testing.T) {
 		WriteMsg(t, r)
 	}
 
-	AssertDirContents(t, dir, logname+"-"+today+"-1.ndjson", logname+"-"+today+"-2.ndjson", logname+"-"+today+"-3.ndjson", logname+"-diagnostic-"+twoDaysAgo+".zip")
+	AssertDirContents(t, dir, logname+"-"+today+".ndjson", logname+"-"+today+"-1.ndjson", logname+"-"+today+"-2.ndjson", logname+"-diagnostic-"+twoDaysAgo+".zip")
 }
 
 // Tests the FileConfig.RotateOnStartup parameter
diff --git a/file/trigger.go b/file/trigger.go
index 22c128a3..428f8354 100644
--- a/file/trigger.go
+++ b/file/trigger.go
@@ -138,6 +138,8 @@ func newIntervalTrigger(interval time.Duration, clock clock) trigger {
 			return lastInterval != currentInterval
 		}
 	}
+
+	t.lastRotate = time.Now()
 	return &t
 }