Remove the need for ensure_cache_exists.

Library/Homebrew/cask/lib/hbc.rb

@@ -28,7 +28,6 @@ require "hbc/version"
 
 module Hbc
   def self.init
-    Cache.ensure_cache_exists
     Caskroom.ensure_caskroom_exists
   end
 end

Library/Homebrew/cask/lib/hbc/cache.rb

@@ -5,12 +5,5 @@ module Hbc
     def path
       @path ||= HOMEBREW_CACHE.join("Cask")
     end
-
-    def ensure_cache_exists
-      return if path.exist?
-
-      odebug "Creating Cache at #{path}"
-      path.mkpath
-    end
   end
 end

Library/Homebrew/cask/lib/hbc/cli/cleanup.rb

@@ -8,10 +8,6 @@ module Hbc
         "cleans up cached downloads and tracker symlinks"
       end
 
-      def self.needs_init?
-        true
-      end
-
       attr_reader :cache_location
 
       def initialize(*args, cache_location: Cache.path)
@@ -24,7 +20,7 @@ module Hbc
       end
 
       def cache_files
-        return [] unless cache_location.exist?
+        return [] unless cache_location.directory?
         cache_location.children
                       .map(&method(:Pathname))
                       .reject(&method(:outdated?))

Library/Homebrew/cask/lib/hbc/cli/fetch.rb

@@ -17,10 +17,6 @@ module Hbc
         end
       end
 
-      def self.needs_init?
-        true
-      end
-
       def self.help
         "downloads remote application files to local cache"
       end

Library/Homebrew/cask/lib/hbc/download_strategy.rb

@@ -95,6 +95,8 @@ module Hbc
     end
 
     def fetch
+      tarball_path.dirname.mkpath
+
       ohai "Downloading #{@url}"
       if tarball_path.exist?
         puts "Already downloaded: #{tarball_path}"
@@ -193,6 +195,8 @@ module Hbc
 
     # super does not provide checks for already-existing downloads
     def fetch
+      cached_location.dirname.mkpath
+
       if cached_location.directory?
         puts "Already downloaded: #{cached_location}"
       else

Library/Homebrew/test/support/helper/spec/shared_context/homebrew_cask.rb

@@ -23,7 +23,7 @@ RSpec.shared_context "Homebrew-Cask" do
     begin
       HOMEBREW_CASK_DIRS.values.each(&:mkpath)
 
-      [Hbc::Config.global.binarydir, Hbc::Caskroom.path, Hbc::Cache.path].each(&:mkpath)
+      [Hbc::Config.global.binarydir, Hbc::Caskroom.path].each(&:mkpath)
 
       Tap.default_cask_tap.tap do |tap|
         FileUtils.mkdir_p tap.path.dirname