From e23a5b47fe77c258c1df57b341ea33756ac5fec0 Mon Sep 17 00:00:00 2001
From: Will Binns-Smith <wbinnssmith@gmail.com>
Date: Mon, 22 Apr 2019 10:50:18 -0700
Subject: [PATCH] Fail immediately if yarn.lock updates are needed

---
 azure-pipelines-template.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/azure-pipelines-template.yml b/azure-pipelines-template.yml
index 734e18ff823..5ff001e5eab 100644
--- a/azure-pipelines-template.yml
+++ b/azure-pipelines-template.yml
@@ -36,7 +36,9 @@ jobs:
         cargo -V
       displayName: Install Rust
 
-  - script: yarn
+  # use `--frozen-lockfile` to fail immediately if the committed yarn.lock needs updates
+  # https://yarnpkg.com/lang/en/docs/cli/install/#toc-yarn-install-frozen-lockfile
+  - script: yarn --frozen-lockfile
     displayName: 'Install dependencies'
   - script: yarn test-ci
     displayName: 'Run tests'