From 46aa2f3bae61870b8360e8a22aa11d8786cc19d8 Mon Sep 17 00:00:00 2001
From: Stefan Huber <shuber@sthu.org>
Date: Sun, 19 Apr 2020 00:01:29 +0200
Subject: [PATCH] macros: Fix OnBattery()

Avoid reading /sys file if not existent.
---
 macros.vim | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/macros.vim b/macros.vim
index 5859967..046e381 100644
--- a/macros.vim
+++ b/macros.vim
@@ -119,7 +119,9 @@ function OnBattery()
   if has('macunix')
     return match(system('pmset -g batt'), "Now drawing from 'Battery Power'") != -1
   elseif has('unix')
-    return readfile('/sys/class/power_supply/AC/online') == ['0']
+    if filereadable('/sys/class/power_supply/AC/online')
+      return readfile('/sys/class/power_supply/AC/online') == ['0']
+    endif
   endif
   return 0
 endfunction
-- 
2.39.5