From abbda96de7725f89c497e727518c1e7c4dc26eeb Mon Sep 17 00:00:00 2001
From: isaacs <i@izs.me>
Date: Thu, 1 Mar 2012 08:58:55 -0800
Subject: Throw on undefined envs in config settings

---
 lib/utils/ini.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/utils/ini.js b/lib/utils/ini.js
index 48d4f99ed..b033b6a04 100644
--- a/lib/utils/ini.js
+++ b/lib/utils/ini.js
@@ -323,8 +323,14 @@ function envReplace (f) {
   if (typeof f !== "string" || !f) return f
 
   // replace any ${ENV} values with the appropriate environ.
-  return f.replace(/\$\{([^}]+)\}/g, function (orig, name, i, s) {
-    return process.env[name] || orig
+  var envExpr = /(\\*)\$\{([^}]+)\}/g
+  return f.replace(envExpr, function (orig, esc, name, i, s) {
+    esc = esc.length && esc.length % 2
+    if (esc) return orig
+    if (undefined === process.env[name]) {
+      throw new Error("Failed to replace env in config: "+orig)
+    }
+    return process.env[name]
   })
 }
 
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