From 28504229aa7a1389fa60bbfb9b987344d608e925 Mon Sep 17 00:00:00 2001
From: Max Howell <max@methylblue.com>
Date: Tue, 9 Mar 2010 02:09:46 +0000
Subject: [PATCH] Resolve aliases in ARGV extension.

* This allows most brew commands to automatically accept aliases.
---
 Library/Homebrew/extend/ARGV.rb | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/Library/Homebrew/extend/ARGV.rb b/Library/Homebrew/extend/ARGV.rb
index e87048c0fb..352f5d03d7 100644
--- a/Library/Homebrew/extend/ARGV.rb
+++ b/Library/Homebrew/extend/ARGV.rb
@@ -6,21 +6,24 @@ module HomebrewArgvExtension
   def named
     @named ||= reject{|arg| arg[0..0] == '-'}
   end
+
   def options
     select {|arg| arg[0..0] == '-'}
   end
+
   def formulae
     require 'formula'
-    @formulae ||= downcased_unique_named.collect {|name| Formula.factory name}
+    @formulae ||= downcased_unique_named.map{ |name| Formula.factory(resolve_alias(name)) }
     raise FormulaUnspecifiedError if @formulae.empty?
     @formulae
   end
+
   def kegs
     require 'keg'
     @kegs ||= downcased_unique_named.collect do |name|
-      d=HOMEBREW_CELLAR+name
+      d = HOMEBREW_CELLAR + resolve_alias(name)
       dirs = d.children.select{ |pn| pn.directory? } rescue []
-      raise "#{name} is not installed" if not d.directory? or dirs.length == 0
+      raise "No such keg: #{HOMEBREW_CELLAR}/#{name}" if not d.directory? or dirs.length == 0
       raise "#{name} has multiple installed versions" if dirs.length > 1
       Keg.new dirs.first
     end
@@ -102,6 +105,15 @@ module HomebrewArgvExtension
   private
 
   def downcased_unique_named
-    @downcased_unique_named ||= named.collect{|arg| arg.downcase}.uniq
+    @downcased_unique_named ||= named.map(&:downcase).uniq
+  end
+
+  def resolve_alias name
+    aka = HOMEBREW_REPOSITORY+"Library/Aliases/#{name}"
+    if aka.file?
+      aka.realpath.basename('.rb').to_s
+    else
+      name
+    end
   end
 end