use frozen lockfile to fail on outdated yarn.lock

sokra · sokra · commit f6dd7a5bca2c · 2017-07-12T08:13:26.000+02:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -21,9 +21,9 @@ environment:
 install:
   - ps: Install-Product node $env:nodejs_version x64
   - npm install yarn -g
-  - yarn install
-  - yarn link || yarn link
-  - yarn link webpack
+  - yarn install --frozen-lockfile
+  - yarn link --frozen-lockfile || yarn link --frozen-lockfile
+  - yarn link webpack --frozen-lockfile
 
 build: off
 
diff --git a/ci/travis-install.sh b/ci/travis-install.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 set -ev
 
-yarn link || true && yarn link webpack;
+yarn link --frozen-lockfile || true && yarn link webpack --frozen-lockfile;
+
+yarn --frozen-lockfile
 
