restic-backup-no-lock.diff

diff --git a/cmd/restic/cmd_backup.go b/cmd/restic/cmd_backup.go
index 4e78a153..76303f85 100644
--- a/cmd/restic/cmd_backup.go
+++ b/cmd/restic/cmd_backup.go
@@ -255,10 +255,13 @@ func readBackupFromStdin(opts BackupOptions, gopts GlobalOptions, args []string)
 		return err
 	}
 
-	lock, err := lockRepo(repo)
-	defer unlockRepo(lock)
-	if err != nil {
-		return err
+	if !gopts.NoLock {
+		Warnf("WARNING: No lock file is being created, this may lead to data loss!\n")
+		lock, err := lockRepo(repo)
+		defer unlockRepo(lock)
+		if err != nil {
+			return err
+		}
 	}
 
 	err = repo.LoadIndex(gopts.ctx)
@@ -393,10 +396,13 @@ func runBackup(opts BackupOptions, gopts GlobalOptions, args []string) error {
 		return err
 	}
 
-	lock, err := lockRepo(repo)
-	defer unlockRepo(lock)
-	if err != nil {
-		return err
+	if !gopts.NoLock {
+		Warnf("WARNING: No lock file is being created, this may lead to data loss!\n")
+		lock, err := lockRepo(repo)
+		defer unlockRepo(lock)
+		if err != nil {
+			return err
+		}
 	}
 
 	// exclude restic cache