Shows subcommands when root command doesn't implement #call

Author: gustavothecoder

lib/dry/cli.rb

@@ -111,6 +111,7 @@ def perform_registry(arguments)
       return usage(result) unless result.found?
 
       command, args = parse(result.command, result.arguments, result.names)
+      return usage(result) unless command.respond_to?(:call)
 
       result.before_callbacks.run(command, args)
       command.call(**args)

spec/support/shared_examples/inherited_commands.rb

@@ -18,6 +18,15 @@
       expect(error).to eq(expected)
     end
 
+    it "shows subcommands when root command doesn't implement #call" do
+      error = capture_error { cli.call(arguments: %w[namespace]) }
+      expected = <<~DESC
+        Commands:
+          #{cmd} namespace sub-command               # I'm a concrete command
+      DESC
+      expect(error).to eq(expected)
+    end
+
     it "shows run's help" do
       output = capture_output { cli.call(arguments: %w[i run --help]) }
       expected = <<~DESC