1 files changed, 42 insertions, 0 deletions
diff --git a/lib/rubygems/commands/list_command.rb b/lib/rubygems/commands/list_command.rb
new file mode 100644
index 0000000000..fab4b73814
--- /dev/null
+++ b/lib/rubygems/commands/list_command.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require_relative "../command"
+require_relative "../query_utils"
+
+##
+# Searches for gems starting with the supplied argument.
+
+class Gem::Commands::ListCommand < Gem::Command
+  include Gem::QueryUtils
+
+  def initialize
+    super "list", "Display local gems whose name matches REGEXP",
+         domain: :local, details: false, versions: true,
+         installed: nil, version: Gem::Requirement.default
+
+    add_query_options
+  end
+
+  def arguments # :nodoc:
+    "REGEXP        regexp to look for in gem name"
+  end
+
+  def defaults_str # :nodoc:
+    "--local --no-details"
+  end
+
+  def description # :nodoc:
+    <<-EOF
+The list command is used to view the gems you have installed locally.
+
+The --details option displays additional details including the summary, the
+homepage, the author, the locations of different versions of the gem.
+
+To search for remote gems use the search command.
+    EOF
+  end
+
+  def usage # :nodoc:
+    "#{program_name} [REGEXP ...]"
+  end
+end