From: Stefan Huber <shuber@sthu.org>
Date: Sat, 18 Apr 2020 22:01:29 +0000 (+0200)
Subject: macros: Fix OnBattery()
X-Git-Url: https://git.sthu.org/?p=vimconf.git;a=commitdiff_plain;h=46aa2f3bae61870b8360e8a22aa11d8786cc19d8

macros: Fix OnBattery()

Avoid reading /sys file if not existent.
---

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