Allow searching/installing Homebrew Casks.

People want to install things like GIMP using Homebrew so let's make it
easier for them to find a decent installation method.

Closes Homebrew/homebrew#34496.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Library/Homebrew/cmd/install.rb

@@ -19,7 +19,8 @@ module Homebrew
         msg = blacklisted? name
         raise "No available formula for #{name}\n#{msg}" if msg
       end
-      if not File.exist? name and name =~ HOMEBREW_TAP_FORMULA_REGEX then
+      if !File.exist?(name) && (name =~ HOMEBREW_TAP_FORMULA_REGEX \
+                                || name =~ HOMEBREW_CASK_TAP_FORMULA_REGEX)
         install_tap $1, $2
       end
     end unless ARGV.force?
@@ -27,6 +28,17 @@ module Homebrew
     begin
       formulae = []
 
+      if ARGV.casks.any?
+        brew_cask = Formulary.factory("brew-cask")
+        install_formula(brew_cask) unless brew_cask.installed?
+
+        ARGV.casks.each do |c|
+          cmd = "brew", "cask", "install", c
+          ohai cmd.join " "
+          system *cmd
+        end
+      end
+
       ARGV.formulae.each do |f|
         # Building head-only without --HEAD is an error
         if not ARGV.build_head? and f.stable.nil?

Library/Homebrew/cmd/search.rb

@@ -76,6 +76,7 @@ module Homebrew
     %w{Homebrew binary},
     %w{Homebrew python},
     %w{Homebrew php},
+    %w{Caskroom cask},
   ]
 
   def query_regexp(query)
@@ -94,7 +95,10 @@ module Homebrew
   end
 
   def search_tap user, repo, rx
-    return [] if (HOMEBREW_LIBRARY/"Taps/#{user.downcase}/homebrew-#{repo.downcase}").directory?
+    if (HOMEBREW_LIBRARY/"Taps/#{user.downcase}/homebrew-#{repo.downcase}").directory? && \
+       "#{user}/#{repo}" != "Caskroom/cask"
+      return []
+    end
 
     results = []
     tree = {}
@@ -113,7 +117,7 @@ module Homebrew
       end
     end
 
-    paths = tree["Formula"] || tree["HomebrewFormula"] || tree["."] || []
+    paths = tree["Formula"] || tree["HomebrewFormula"] || tree["Casks"] || tree["."] || []
     paths.each do |path|
       name = File.basename(path, ".rb")
       results << "#{user}/#{repo}/#{name}" if rx === name

Library/Homebrew/extend/ARGV.rb

@@ -13,7 +13,11 @@ module HomebrewArgvExtension
 
   def formulae
     require "formula"
-    @formulae ||= downcased_unique_named.map { |name| Formulary.factory(name, spec) }
+    @formulae ||= (downcased_unique_named - casks).map { |name| Formulary.factory(name, spec) }
+  end
+
+  def casks
+    @casks ||= downcased_unique_named.grep HOMEBREW_CASK_TAP_FORMULA_REGEX
   end
 
   def kegs

Library/Homebrew/tap_constants.rb

@@ -6,3 +6,5 @@ HOMEBREW_TAP_FORMULA_REGEX = %r{^([\w-]+)/([\w-]+)/([\w+-.]+)$}
 HOMEBREW_TAP_DIR_REGEX = %r{#{Regexp.escape(HOMEBREW_LIBRARY.to_s)}/Taps/([\w-]+)/([\w-]+)}
 # match taps' formula path, e.g. HOMEBREW_LIBRARY/Taps/someuser/sometap/someformula
 HOMEBREW_TAP_PATH_REGEX = Regexp.new(HOMEBREW_TAP_DIR_REGEX.source + %r{/(.*)}.source)
+# match the default brew-cask tap e.g. Caskroom/cask
+HOMEBREW_CASK_TAP_FORMULA_REGEX = %r{^(Caskroom)/(cask)/([\w+-.]+)$}

Library/Homebrew/test/test_ARGV.rb

@@ -11,6 +11,11 @@ class ArgvExtensionTests < Homebrew::TestCase
     assert_raises(FormulaUnavailableError) { @argv.formulae }
   end
 
+  def test_argv_casks
+    @argv.unshift 'mxcl'
+    assert_equal [], @argv.casks
+  end
+
   def test_argv_kegs
     keg = HOMEBREW_CELLAR + "mxcl/10.0"
     keg.mkpath