ARGV+yeast

Extensions to ARGV that are convenient or improve our robustness

Library/Homebrew/ARGV+yeast.rb

@@ -0,0 +1,84 @@
+#  Copyright 2009 Max Howell <max@methylblue.com>
+#
+#  This file is part of Homebrew.
+#
+#  Homebrew is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  Homebrew is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with Homebrew.  If not, see <http://www.gnu.org/licenses/>.
+#
+module HomebrewArgvExtension
+  def named
+    reject {|arg| arg[0..0] == '-'}
+  end
+  def options
+    select {|arg| arg[0..0] == '-'}
+  end
+  def formulae
+    require 'formula'
+    named.collect {|name| Formula.factory name}
+  end
+  def kegs
+    require 'keg'
+    named.collect do |name|
+      d=HOMEBREW_CELLAR+name
+      raise "#{name} is not installed" if not d.directory? or d.children.length == 0
+      raise "#{name} has multiple installed versions" if d.children.length > 1
+      Keg.new d.children[0]
+    end
+  end
+  
+  # self documenting perhaps?
+  def include? arg
+    @n=index arg
+  end
+  def next
+    at @n+1
+  end
+
+  def force?
+    flag? '--force'
+  end
+  def verbose?
+    flag? '--verbose'
+  end
+  def debug?
+    flag? '--debug' or ENV['HOMEBREW_DEBUG']
+  end
+
+  def flag? flag
+    options.each do |arg|
+      return true if arg == flag
+      next if arg[1..1] == '-'
+      return true if arg.include? flag[2..2]
+    end
+    return false
+  end
+  
+  def usage
+    <<-EOS
+Usage: brew command [formula] ...
+Usage: brew [--prefix] [--cache] [--version]
+Usage: brew [--verbose]
+
+Commands:
+  install formula ... [--debug] [--interactive]
+  rm formula ...
+  list formula ...
+  ln formula ...
+  info [formula] [--github]
+  mk url
+  prune
+  EOS
+  end
+end
+
+ARGV.extend HomebrewArgvExtension