Ensure storefront.xcconfig

Scripts/ensure_storefront_config

@@ -0,0 +1,14 @@
+ #!/usr/bin/env bash
+
+set -e
+
+if [ ! -f "./samples/MobileBuyIntegration/Storefront.xcconfig" ]; then
+  echo """
+    Error: Your project is missing a Storefront.xcconfig file.
+
+    Replace the STOREFRONT_DOMAIN and STOREFRONT_ACCESS_TOKEN environment variables in \"samples/MobileBuyIntegration/Storefront.xcconfig.example\" and rename the file to \"Storefront.xcconfig\" to get started.
+
+    If you don't have a Shopify app setup, go to https://admin.shopify.com/settings/apps/development to configure an application for your storefront which will give you access to the Storefront API.
+  """
+  exit 1;
+fi

dev.yml

@@ -4,9 +4,15 @@ type: ios
 
 up:
   - ruby
+  - custom:
+      name: Ensure Storefront.xcconfig file
+      met?: |
+        ([ -f "./samples/MobileBuyIntegration/Storefront.xcconfig" ] || exit 1)
+      meet: ./scripts/ensure_storefront_config
   - custom:
       name: Setup entitlements
-      met?: ([ -f "./samples/MobileBuyIntegration/MobileBuyIntegration/MobileBuyIntegration.entitlements" ] || exit 1;)
+      met?: |
+        ([ -f "./samples/MobileBuyIntegration/MobileBuyIntegration/MobileBuyIntegration.entitlements" ] || exit 1;)
       meet: ./scripts/setup_entitlements
 
 packages: