Add alias support to formulae

* brew install will find an aliased formula
* aliases are searched against
* warn when creating a new formula that has an existing alias.

If Subversion has an alias "svn", then warn when the user tries to
create a new formula "svn". The formula can still be created, though
the user should make sure it's not a duplicate of the existing
aliased one.

Subversion and Objective-Caml formulas get some alises here, so we have
something to test against.

1 files changed, 3 insertions, 1 deletions

diff --git a/bin/brew b/bin/brew
index 7b42a8f19..adc5e51c1 100755
--- a/bin/brew
+++ b/bin/brew
@@ -98,7 +98,9 @@ begin
       end
 
     when 'search', '-S'
-      formulae = (HOMEBREW_REPOSITORY+'Library/Formula').children.sort.map{|f| f.basename('.rb') }
+      require "formula"
+      formulae = Formulary.names with_aliases=true
+
       if ARGV.first =~ /^\/(.*)\/$/
         puts_columns formulae.grep(Regexp.new($1))
       else