From: Luis Lavena <luislavena@...>
Date: 2011-09-06T03:30:22+09:00
Subject: [ruby-core:39284] Dir.home and Windows specific behavior

Hello,

Checking some Ruby C code (win32/win32.c) found that once
File.expand_path or Dir.home is used, ENV["HOME"] is set.

<pre>
C:\Users\Luis>set HOME
Environment variable HOME not defined

C:\Users\Luis>ruby --disable-gems -ve "puts ENV['HOME']"
ruby 1.9.4dev (2011-09-05 trunk 33186) [i386-mingw32]
C:/Users/Luis
</pre>

I believe this is done for performance, but I cannot find a comment
that documents this behavior.

https://github.com/ruby/ruby/blob/trunk/win32/win32.c#L559-581

Is this expected? My conclusion is correct?

Thank you.
-- 
Luis Lavena
AREA 17
-
Perfection in design is achieved not when there is nothing more to add,
but rather when there is nothing more to take away.
Antoine de Saint-Exup�ry