From bb411e4ae16d6a5c61ea595c0c12e2ecee081ff9 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Wed, 24 Aug 2022 22:36:40 +0200
Subject: Fix progress bar flicker with -L

This was caused by -L calling setLogFormat() again, which caused the
creation of a new progress bar without destroying the old one. So we
had two progress bars clobbering each other.

We should change 'logger' to be a smart pointer, but I'll do that in a
future PR.

Fixes #6931.
---
 src/nix/main.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/nix/main.cc')

diff --git a/src/nix/main.cc b/src/nix/main.cc
index a8404a2ea..f434e9655 100644
--- a/src/nix/main.cc
+++ b/src/nix/main.cc
@@ -82,7 +82,7 @@ struct NixArgs : virtual MultiCommand, virtual MixCommonArgs
             .shortName = 'L',
             .description = "Print full build logs on standard error.",
             .category = loggingCategory,
-            .handler = {[&]() {setLogFormat(LogFormat::barWithLogs); }},
+            .handler = {[&]() { logger->setPrintBuildLogs(true); }},
         });
 
         addFlag({
-- 
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