From 9dc875f2460433e5f69eaf0a2dbb560e414db789 Mon Sep 17 00:00:00 2001
From: Tomoyuki Sahara <tsahara@iij.ad.jp>
Date: Fri, 23 Aug 2013 16:00:08 +0900
Subject: add `cmd` (command output expression).

---
 mrblib/kernel.rb | 4 ++++
 test/io.rb       | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/mrblib/kernel.rb b/mrblib/kernel.rb
index 11ac5785f..484b50160 100644
--- a/mrblib/kernel.rb
+++ b/mrblib/kernel.rb
@@ -1,4 +1,8 @@
 module Kernel
+  def self.`(cmd)
+    IO.popen(cmd) { |io| io.read }
+  end
+
   def open(file, *rest, &block)
     raise ArgumentError unless file.is_a?(String)
 
diff --git a/test/io.rb b/test/io.rb
index 727c67303..315f3ea79 100644
--- a/test/io.rb
+++ b/test/io.rb
@@ -232,6 +232,10 @@ assert('IO#fileno') do
   io.closed?
 end
 
+assert('`cmd`') do
+  assert_equal `echo foo`, "foo\n"
+end
+
 assert('IO TEST CLEANUP') do
   assert_nil MRubyIOTestUtil.io_test_cleanup
 end
-- 
cgit v1.2.3