Output plain list when running brew cask search without a TTY.

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

@@ -46,6 +46,11 @@ module Hbc
       end
 
       def self.render_results(exact_match, partial_matches, remote_matches, search_term)
+        unless $stdout.tty?
+          puts [*exact_match, *partial_matches, *remote_matches]
+          return
+        end
+
         if !exact_match && partial_matches.empty?
           puts "No Cask found for \"#{search_term}\"."
           return

Library/Homebrew/test/cask/cli/search_spec.rb

@@ -1,4 +1,8 @@
 describe Hbc::CLI::Search, :cask do
+  before(:each) do
+    allow($stdout).to receive(:tty?).and_return(true)
+  end
+
   it "lists the available Casks that match the search term" do
     expect {
       Hbc::CLI::Search.run("local")