read a config value in a UE4 ModuleRules

MyProject-GetConfigValue.Build.cs

/// <summary>
/// Get a value from a config file for the project of the current target
/// </summary>
/// <returns>true if a value was found for the given section and key</returns>
bool TryGetConfigValue(ConfigHierarchyType ConfigType, string SectionName, string KeyName, out string Value)
{
	ConfigHierarchy Config = ConfigCache.ReadHierarchy(ConfigType, DirectoryReference.FromFile(Target.ProjectFile), Target.Platform);
	if (Config != null)
	{
		ConfigHierarchySection Section = Config.FindSection(SectionName);
		if (Section != null)
		{
			return Section.TryGetValue(KeyName, out Value);
		}
	}
	Value = null;
	return false;
}