From 309fe157f60e537e94f95e1ce3505a3fcdbd4994 Mon Sep 17 00:00:00 2001
From: Noam Postavsky <npostavs@users.sourceforge.net>
Date: Mon, 1 Aug 2016 18:21:17 -0400
Subject: [PATCH] * Rakefile: Handle unset `warnings' parameter

---
 Rakefile | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Rakefile b/Rakefile
index df4bb7f..48a2086 100644
--- a/Rakefile
+++ b/Rakefile
@@ -98,9 +98,12 @@ end
 desc "Compile yasnippet.el into yasnippet.elc"
 
 rule '.elc' => '.el' do |t|
+  set_warnings = ""
+  if ENV['warnings']
+    set_warnings = " --eval \"(setq byte-compile-warnings #{ENV['warnings']})\""
+  end
   sh "#{$EMACS} --batch -L . --eval \"(setq byte-compile-error-on-warn t)\"" +
-     " --eval \"(setq byte-compile-warnings #{ENV['warnings']})\"" +
-     " -f batch-byte-compile #{t.source}"
+     "#{set_warnings} -f batch-byte-compile #{t.source}"
 end
 task :compile => FileList["yasnippet.el"].ext('elc')