Filter ANSI escape sequences in -L output

Otherwise, builds like NixOS VM tests may leave the terminal in a
weird state and do resets.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/nix/progress-bar.cc b/src/nix/progress-bar.cc
index c0bcfb0c9..5c05d6b22 100644
--- a/src/nix/progress-bar.cc
+++ b/src/nix/progress-bar.cc
@@ -120,7 +120,7 @@ public:
     void log(State & state, Verbosity lvl, const std::string & s)
     {
         if (state.active) {
-            writeToStderr("\r\e[K" + s + ANSI_NORMAL "\n");
+            writeToStderr("\r\e[K" + filterANSIEscapes(s, !isTTY) + ANSI_NORMAL "\n");
             draw(state);
         } else {
             auto s2 = s + ANSI_NORMAL "\n";