From 5802eca7f9b02e0cda601ee2effa5197c014a957 Mon Sep 17 00:00:00 2001
From: Vahan Minasian <vaanatwork@gmail.com>
Date: Mon, 11 Feb 2019 17:33:59 +0100
Subject: [PATCH] feat(enforce-yarn): enforce yarn instead of npm on install of
 packages

---
 package.json            | 1 +
 scripts/enforce-yarn.js | 8 ++++++++
 2 files changed, 9 insertions(+)
 create mode 100644 scripts/enforce-yarn.js

diff --git a/package.json b/package.json
index 1ec4016..efdabdf 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "0.0.0",
   "description": "seed repository with basic functionality",
   "scripts": {
+    "preinstall": "node scripts/enforce-yarn.js",
     "commit": "git-cz",
     "enforce:gitflow": "node ./node_modules/.bin/enforce-gitflow-branches"
   },
diff --git a/scripts/enforce-yarn.js b/scripts/enforce-yarn.js
new file mode 100644
index 0000000..1c279da
--- /dev/null
+++ b/scripts/enforce-yarn.js
@@ -0,0 +1,8 @@
+/**
+ * Restrict using `npm` for installing packages
+ */
+if (process.env.npm_execpath.indexOf('yarn') === -1) {
+    console.error('You must use Yarn to install dependencies:');
+    console.error('  $ yarn install');
+    process.exit(1);
+}