From 68815f93b6343588c7f2c01d9e769a2fef7f9a1b Mon Sep 17 00:00:00 2001
From: Jeremy Green <jeremy@octolabs.com>
Date: Tue, 17 Oct 2023 16:06:37 -0500
Subject: [PATCH] Add the parallel-ci script

---
 bin/parallel-ci | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100755 bin/parallel-ci

diff --git a/bin/parallel-ci b/bin/parallel-ci
new file mode 100755
index 00000000..11920923
--- /dev/null
+++ b/bin/parallel-ci
@@ -0,0 +1,15 @@
+#!/usr/bin/env ruby
+
+sha = ENV['GITHUB_SHA'] || `git rev-parse HEAD`
+node_total = ENV["CI_NODE_TOTAL"] || 1
+node_index = ENV["CI_NODE_INDEX"] || 0
+tests = Dir["test/**/*_test.rb"].
+  sort.
+  # Add randomization seed based on SHA of each commit
+  shuffle(random: Random.new(sha.to_i(16))).
+  select.
+  with_index do |el, i|
+    i % node_total.to_i == node_index.to_i
+  end
+
+exec "bundle exec rails test #{tests.join(" ")}"