From 98ed8d9a295bd4995ea7e2259e26fbd05b1880c8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Krist=C3=B3f=20T=C3=B3th?= <mrtoth@strongds.hu>
Date: Wed, 9 Sep 2020 23:50:28 +0200
Subject: [PATCH] Remove logfile if it's empty before exiting

---
 cmd/after-lock/after-lock.go |  2 +-
 cmd/after-lock/logging.go    | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/cmd/after-lock/after-lock.go b/cmd/after-lock/after-lock.go
index 384229f..a27164b 100644
--- a/cmd/after-lock/after-lock.go
+++ b/cmd/after-lock/after-lock.go
@@ -25,7 +25,7 @@ func main() {
 	defer handleErrors()
 	f := initLogging()
 	if f != nil {
-		defer f.Close()
+		defer teardownLogging(f)
 	}
 
 	lock := grabExclusiveProcessLock()
diff --git a/cmd/after-lock/logging.go b/cmd/after-lock/logging.go
index 3ad5e89..4eb48f4 100644
--- a/cmd/after-lock/logging.go
+++ b/cmd/after-lock/logging.go
@@ -17,4 +17,21 @@ func initLogging() *os.File {
 
 	log.SetOutput(f)
 	return f
+}
+
+func teardownLogging(f *os.File) {
+	fi, err := f.Stat()
+	if err != nil {
+			panic(err)
+	}
+	if fi.Size() == 0 {
+			err = os.Remove(f.Name())
+			if err != nil {
+					panic(err)
+			}
+	}
+	err = f.Close()
+	if err != nil {
+			panic(err)
+	}
 }
\ No newline at end of file