add command 'cask outdated'

3 files changed, 64 insertions, 0 deletions

diff --git a/Library/Homebrew/cask/lib/hbc/cask.rb b/Library/Homebrew/cask/lib/hbc/cask.rb
index 3f8da25b7..cf5f2b37a 100644
--- a/Library/Homebrew/cask/lib/hbc/cask.rb
+++ b/Library/Homebrew/cask/lib/hbc/cask.rb
@@ -89,6 +89,30 @@ module Hbc
       metadata_master_container_path.join(*installed_version, "Casks", "#{token}.rb")
     end
 
+    def outdated?(greedy = false)
+      !outdated_versions(greedy).empty?
+    end
+
+    def outdated_versions(greedy = false)
+      # special case: tap version is not available
+      return [] if version.nil?
+
+      if greedy
+        return versions if version.latest?
+      elsif auto_updates
+        return []
+      end
+
+      installed = versions
+      current   = installed.last
+
+      # not outdated unless there is a different version on tap
+      return [] if current == version
+
+      # collect all installed versions that are different than tap version and return them
+      installed.select { |v| v != version }
+    end
+
     def to_s
       @token
     end
diff --git a/Library/Homebrew/cask/lib/hbc/cli.rb b/Library/Homebrew/cask/lib/hbc/cli.rb
index 27bea06ef..aa795fc59 100644
--- a/Library/Homebrew/cask/lib/hbc/cli.rb
+++ b/Library/Homebrew/cask/lib/hbc/cli.rb
@@ -15,6 +15,7 @@ require "hbc/cli/home"
 require "hbc/cli/info"
 require "hbc/cli/install"
 require "hbc/cli/list"
+require "hbc/cli/outdated"
 require "hbc/cli/reinstall"
 require "hbc/cli/search"
 require "hbc/cli/style"
diff --git a/Library/Homebrew/cask/lib/hbc/cli/outdated.rb b/Library/Homebrew/cask/lib/hbc/cli/outdated.rb
new file mode 100644
index 000000000..d608beab5
--- /dev/null
+++ b/Library/Homebrew/cask/lib/hbc/cli/outdated.rb
@@ -0,0 +1,39 @@
+module Hbc
+  class CLI
+    class Outdated < Base
+      def self.run(*args)
+        greedy  = args.include?("--greedy")
+        verbose = ($stdout.tty? || CLI.verbose?) && !args.include?("--quiet")
+
+        cask_tokens = cask_tokens_from(args)
+        casks_to_check = if cask_tokens.empty?
+          Hbc.installed
+        else
+          cask_tokens.map { |token| Hbc.load(token) }
+        end
+
+        casks_to_check.each do |cask|
+          odebug "Checking update info of Cask #{cask}"
+          list_if_outdated(cask, greedy, verbose)
+        end
+      end
+
+      def self.list_if_outdated(cask, greedy, verbose)
+        return unless cask.outdated?(greedy)
+
+        if verbose
+          outdated_versions = cask.outdated_versions(greedy)
+          outdated_info   = "#{cask.token} (#{outdated_versions.join(", ")})"
+          current_version = cask.version.to_s
+          puts "#{outdated_info} != #{current_version}"
+        else
+          puts cask.token
+        end
+      end
+
+      def self.help
+        "list the outdated installed Casks"
+      end
+    end
+  end
+end