use Module#const_get instead of eval

* may be a problem if the constant is scoped (like A::B), but this is not the case
  (const.split('::').inject(Object) { |c, part| c.const_get part } would solve that)
* this was noticed in a comment of 9afc85ad but it has disappeared

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/bin/brew b/bin/brew
index c06a673dc..5fe19cc89 100755
--- a/bin/brew
+++ b/bin/brew
@@ -71,10 +71,9 @@ begin
 
   # Add example external commands to PATH before checking.
   ENV['PATH'] += ":#{HOMEBREW_REPOSITORY}/Library/Contributions/examples"
-
   if system "/usr/bin/which -s brew-#{cmd}"
     %w[CACHE CELLAR LIBRARY_PATH PREFIX REPOSITORY].each do |e|
-      ENV["HOMEBREW_#{e}"] = eval "HOMEBREW_#{e}"
+      ENV["HOMEBREW_#{e}"] = Object.const_get "HOMEBREW_#{e}"
     end
     exec "brew-#{cmd}", *ARGV
   elsif require? `/usr/bin/which brew-#{cmd}.rb`