1 files changed, 33 insertions, 0 deletions
diff --git a/lib/rubygems/commands/outdated_command.rb b/lib/rubygems/commands/outdated_command.rb
new file mode 100644
index 0000000000..08a9221a26
--- /dev/null
+++ b/lib/rubygems/commands/outdated_command.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require_relative "../command"
+require_relative "../local_remote_options"
+require_relative "../spec_fetcher"
+require_relative "../version_option"
+
+class Gem::Commands::OutdatedCommand < Gem::Command
+  include Gem::LocalRemoteOptions
+  include Gem::VersionOption
+
+  def initialize
+    super "outdated", "Display all gems that need updates"
+
+    add_local_remote_options
+    add_platform_option
+  end
+
+  def description # :nodoc:
+    <<-EOF
+The outdated command lists gems you may wish to upgrade to a newer version.
+
+You can check for dependency mismatches using the dependency command and
+update the gems with the update or install commands.
+    EOF
+  end
+
+  def execute
+    Gem::Specification.outdated_and_latest_version.each do |spec, remote_version|
+      say "#{spec.name} (#{spec.version} < #{remote_version})"
+    end
+  end
+end