From 112313cf4ab051acc1589260cc6a6460aad82b1b Mon Sep 17 00:00:00 2001
From: Jan Orel <jorel@opennebula.io>
Date: Sun, 4 Aug 2024 22:04:04 +0200
Subject: [PATCH] B #-: Oncfg: make empty YAML load backward comp. (#3192)

---
 src/onecfg/lib/config/type/yaml.rb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/onecfg/lib/config/type/yaml.rb b/src/onecfg/lib/config/type/yaml.rb
index 74875aaa8b..3385766e16 100644
--- a/src/onecfg/lib/config/type/yaml.rb
+++ b/src/onecfg/lib/config/type/yaml.rb
@@ -43,6 +43,10 @@ module OneCfg::Config::Type
 
             if Gem::Version.new(Psych.const_get(:VERSION)) >= Gem::Version.new('4.0')
                 @content = YAML.load_file(name, :aliases => true)
+
+                # for backward compatibility with older Psych return `false`
+                # instead of `nil` if the file was empty
+                @content = false if @content.nil?
             else
                 @content = YAML.load_file(name)
             end