From 9b28ba7a5eabcc61d5d9891fa8cab3285a371788 Mon Sep 17 00:00:00 2001
From: Maxim Kolesnikov <indev.src@gmail.com>
Date: Mon, 4 Apr 2022 17:49:13 +0700
Subject: [PATCH] fix(script): clear output when exec-if fails (#2675)

Fixes #2674
---
 CHANGELOG.md                   | 2 ++
 src/adapters/script_runner.cpp | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2f4936cd..160aadbe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- `custom/script`: Output clearing when `exec-if` fails ([`#2674`](https://github.com/polybar/polybar/issues/2674))
 
 ## [3.6.2] - 2022-04-03
 ### Fixed
diff --git a/src/adapters/script_runner.cpp b/src/adapters/script_runner.cpp
index 23a791f4..c1742199 100644
--- a/src/adapters/script_runner.cpp
+++ b/src/adapters/script_runner.cpp
@@ -45,7 +45,10 @@ script_runner::interval script_runner::process() {
 }
 
 void script_runner::clear_output() {
-  set_output("");
+  auto changed = set_output("");
+  if (changed) {
+    m_on_update(m_data);
+  }
 }
 
 void script_runner::stop() {