Issue 2828510: Prevent installation of Commerce if bcmath PHP extensi…

commerce.install

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * @file
+ * Contains install and update functions for Commerce.
+ */
+
+/**
+ * Implements hook_requirements().
+ */
+function commerce_requirements($phase) {
+  $requirements = [];
+  if ($phase == 'install') {
+    if (!extension_loaded('bcmath')) {
+      $requirements['commerce'] = [
+        'description' => t('Commerce requires the bcmath PHP extension.'),
+        'severity' => REQUIREMENT_ERROR,
+      ];
+    }
+  }
+
+  return $requirements;
+}

composer.json

@@ -12,7 +12,8 @@
         "drupal/inline_entity_form": "~1.0",
         "drupal/profile": "1.x-dev",
         "drupal/state_machine": "~1.0",
-        "commerceguys/intl": "~0.7"
+        "commerceguys/intl": "~0.7",
+        "ext-bcmath": "*"
     },
     "minimum-stability": "dev"
 }