From e6cb8cbee92693c96bfcd939f4de55e0875eb507 Mon Sep 17 00:00:00 2001
From: Max Howell
Date: Fri, 16 Mar 2012 12:58:39 +0000
Subject: Pathname.atomic_write

---
 Library/Homebrew/extend/pathname.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'Library/Homebrew/extend')

diff --git a/Library/Homebrew/extend/pathname.rb b/Library/Homebrew/extend/pathname.rb
index bc58c885f..da195e5a8 100644
--- a/Library/Homebrew/extend/pathname.rb
+++ b/Library/Homebrew/extend/pathname.rb
@@ -90,6 +90,15 @@ class Pathname
     File.open(self, 'w') {|f| f.write content }
   end
 
+  # NOTE always overwrites
+  def atomic_write content
+    require 'tempfile'
+    tf = Tempfile.new(self.basename.to_s)
+    tf.write(content)
+    tf.close
+    FileUtils.mv tf.path, self.to_s
+  end
+
   def cp dst
     if file?
       FileUtils.cp to_s, dst
-- 
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