From 047b7ab958a7c1ea15c5fbeb265e6908a6879fc5 Mon Sep 17 00:00:00 2001
From: Ewoud Kohl van Wijngaarden <ewoud@kohlvanwijngaarden.nl>
Date: Mon, 3 May 2021 17:30:39 +0200
Subject: [PATCH] Deal with nil branch

default_branch doesn't guarantee a result. This checks for the nil value
and raises an exception.
---
 lib/modulesync/repository.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/modulesync/repository.rb b/lib/modulesync/repository.rb
index 1e508488..ed6d57c6 100644
--- a/lib/modulesync/repository.rb
+++ b/lib/modulesync/repository.rb
@@ -40,6 +40,9 @@ def default_branch
     def switch(branch:)
       unless branch
         branch = default_branch
+        unless branch
+          raise "Unable to detect default branch"
+        end
         puts "Using repository's default branch: #{branch}"
       end
       return if repo.current_branch == branch