From d09621fa11b1470f9859a2e3201741acd2ab5ec9 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <m@mitchellh.com>
Date: Fri, 5 Dec 2025 08:41:16 -0800
Subject: [PATCH] ci: cancel prior test runs for the same git ref

This should save on CI quite a bit. This will cancel our GHA runs when
you push to the same ref, except for `main`, where I want to make sure
every commit is tested.
---
 .github/workflows/nix.yml  | 5 +++++
 .github/workflows/test.yml | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 825cf52f5..f928ed5a5 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -1,5 +1,10 @@
 on: [push, pull_request]
 name: Nix
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name != 'main' && github.ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   required:
     name: "Required Checks: Nix"
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 916745f58..20f674bab 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,6 +5,11 @@ on:
 
 name: Test
 
+# We only want the latest commit to test for any non-main ref.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name != 'main' && github.ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   required:
     name: "Required Checks: Test"