From 0e8140b012181413438002b65290c84284721694 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Mon, 18 Apr 2016 15:16:43 +0100
Subject: [PATCH] brew.sh: error out if no Ruby found.

This is a nicer error message than the `exec` failing at a later stage.
---
 Library/brew.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Library/brew.sh b/Library/brew.sh
index 3bb15adb42..54f713dd98 100644
--- a/Library/brew.sh
+++ b/Library/brew.sh
@@ -70,6 +70,10 @@ then
     HOMEBREW_RUBY_PATH="/System/Library/Frameworks/Ruby.framework/Versions/Current/usr/bin/ruby"
   else
     HOMEBREW_RUBY_PATH="$(which ruby)"
+    if [[ -z "$HOMEBREW_RUBY_PATH" ]]
+    then
+      odie "No Ruby found, cannot proceed."
+    fi
   fi
 fi