From 052f83cda527b648eb3a5a09703a67cc8fc80756 Mon Sep 17 00:00:00 2001
From: Thomas von Deyen <thomas@vondeyen.com>
Date: Fri, 6 Jan 2023 22:29:42 +0100
Subject: [PATCH] Allow to set preview_sources

Before you could only add additional sources,
but you maybe want to override the one default source.
---
 lib/alchemy.rb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/alchemy.rb b/lib/alchemy.rb
index 45a27d26d0..a506b2161c 100644
--- a/lib/alchemy.rb
+++ b/lib/alchemy.rb
@@ -57,6 +57,10 @@ def self.preview_sources
     @_preview_sources ||= Set.new << Alchemy::Admin::PreviewUrl
   end
 
+  def self.preview_sources=(sources)
+    @_preview_sources = Array(sources)
+  end
+
   # Define page publish targets
   #
   # A publish target is a ActiveJob that gets performed