From 8d6b69109d4ce5d7afa75850501a3d8c5916eb2f Mon Sep 17 00:00:00 2001
From: Jon Rowe <hello@jonrowe.co.uk>
Date: Tue, 26 Dec 2023 16:55:15 +0000
Subject: [PATCH] Merge pull request #3058 from rspec/fix-diff-lcs-build

Run older diff-lcs on older version of activesupport
---
 Gemfile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Gemfile b/Gemfile
index 521807c5d1..857bc53a1f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -96,6 +96,9 @@ end
 
 if RUBY_VERSION < '2.0.0'
   gem 'cucumber', "<= 1.3.22"
+elsif !ENV['DIFF_LCS_VERSION'].to_s.empty? && ENV['DIFF_LCS_VERSION'].scan(/\d\.\d/).first.to_f < 1.5
+  # Older version of diff-lcs cause a downstream error with cucumber and modern rails
+  gem "activesupport", "< 7"
 end
 
 gem 'contracts', '< 0.16' if RUBY_VERSION < '1.9.0'