require 'formula' require 'keg' module Homebrew def switch if ARGV.named.length != 2 onoe "Usage: brew switch " exit 1 end name = ARGV.shift version = ARGV.shift # Does this formula have any versions? f = Formula.factory(name.downcase) cellar = f.prefix.parent unless cellar.directory? onoe "#{name} not found in the Cellar." exit 2 end # Does the target version exist? unless (cellar+version).directory? onoe "#{name} does not have a version \"#{version}\" in the Cellar." versions = cellar.subdirs.map { |d| Keg.new(d).version } puts "Versions available: #{versions.join(', ')}" exit 3 end # Unlink all existing versions cellar.subdirs.each do |v| keg = Keg.new(v) puts "Cleaning #{keg}" keg.unlink end # Link new version, if not keg-only if f.keg_only? keg = Keg.new(cellar+version) keg.optlink puts "Opt link created for #{keg}" else keg = Keg.new(cellar+version) puts "#{keg.link} links created for #{keg}" end end end