From 3866fd86353ee1098ca578ea87a0a35a563543b1 Mon Sep 17 00:00:00 2001
From: Charles Lyding <19598772+clydin@users.noreply.github.com>
Date: Wed, 21 Nov 2018 12:08:13 -0500
Subject: [PATCH] fix(@schematics/update): replace environment variables in
 npm/yarn rc

---
 packages/schematics/update/update/npm.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/schematics/update/update/npm.ts b/packages/schematics/update/update/npm.ts
index a73cbfc4205e..1f98ce493c67 100644
--- a/packages/schematics/update/update/npm.ts
+++ b/packages/schematics/update/update/npm.ts
@@ -68,6 +68,11 @@ function readOptions(yarn = false): { [key: string]: string } {
     }
   }
 
+  // Substitute any environment variable references
+  for (const key in options) {
+    options[key] = options[key].replace(/\$\{([^\}]+)\}/, (_, name) => process.env[name] || '');
+  }
+
   return options;
 }