Port Homebrew::Cmd::Pin

Library/Homebrew/cmd/pin.rb

@@ -1,15 +1,13 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
+require "abstract_command"
 require "formula"
-require "cli/parser"
 
 module Homebrew
-  module_function
-
-  sig { returns(CLI::Parser) }
-  def pin_args
-    Homebrew::CLI::Parser.new do
+  module Cmd
+    class Pin < AbstractCommand
+      cmd_args do
         description <<~EOS
           Pin the specified <formula>, preventing them from being upgraded when
           issuing the `brew upgrade` <formula> command. See also `unpin`.
@@ -20,11 +18,9 @@ module Homebrew
 
         named_args :installed_formula, min: 1
       end
-  end
-
-  def pin
-    args = pin_args.parse
 
+      sig { override.void }
+      def run
         args.named.to_resolved_formulae.each do |f|
           if f.pinned?
             opoo "#{f.name} already pinned"
@@ -36,3 +32,5 @@ module Homebrew
         end
       end
     end
+  end
+end

Library/Homebrew/test/cmd/pin_spec.rb

@@ -1,8 +1,9 @@
 # frozen_string_literal: true
 
+require "cmd/pin"
 require "cmd/shared_examples/args_parse"
 
-RSpec.describe "brew pin" do
+RSpec.describe Homebrew::Cmd::Pin do
   it_behaves_like "parseable arguments"
 
   it "pins a Formula's version", :integration_test do