From 4138d04186677998a1cfc042347d3faff5e36eaa Mon Sep 17 00:00:00 2001
From: Josh Matthews <josh@joshmatthews.net>
Date: Mon, 24 May 2021 20:19:18 -0400
Subject: [PATCH] Fail CI if workflow needs regenerating.

---
 .github/workflows/pull-request.yml |  6 ++++--
 etc/ci/workflow_changed.sh         | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100755 etc/ci/workflow_changed.sh

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 44e386af935..7ac0ce74aa9 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -20,11 +20,13 @@ jobs:
           python3 -m pip install --upgrade pip virtualenv
           sudo apt update
           python3 ./mach bootstrap
-      - name: Tidy
-        run: python3 ./mach test-tidy --no-progress --all
+      - name: Workflow check
+        run: ./etc/ci/workflow_changed.sh
       - name: Release build
         run: python3 ./mach build --release
       - name: Unit tests
         run: python3 ./mach test-unit --release
+      - name: Tidy
+        run: python3 ./mach test-tidy --no-progress --all
       - name: Lockfile check
         run: ./etc/ci/lockfile_changed.sh
diff --git a/etc/ci/workflow_changed.sh b/etc/ci/workflow_changed.sh
new file mode 100755
index 00000000000..c87775a7057
--- /dev/null
+++ b/etc/ci/workflow_changed.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+python3 etc/ci/generate_workflow.py
+
+diff="$(find . -name 'main.yml' -print0 | xargs -0 git diff)"
+echo "${diff}"
+[[ -z "${diff}" ]]