Port Homebrew::DevCmd::Formula

Library/Homebrew/dev-cmd/formula.rb

@@ -1,32 +1,34 @@
-# typed: true
+# typed: strict
 # frozen_string_literal: true
 
+require "abstract_command"
 require "formula"
 require "cli/parser"
 
 module Homebrew
-  module_function
+  module DevCmd
+    class FormulaCmd < AbstractCommand
+      sig { returns(String) }
+      def self.command_name = "formula"
 
-  sig { returns(CLI::Parser) }
-  def formula_args
-    Homebrew::CLI::Parser.new do
+      cmd_args do
         description <<~EOS
           Display the path where <formula> is located.
         EOS
 
         named_args :formula, min: 1, without_api: true
       end
-  end
-
-  def formula
-    args = formula_args.parse
 
+      sig { override.void }
+      def run
         formula_paths = args.named.to_paths(only: :formula).select(&:exist?)
         if formula_paths.blank? && args.named
                                        .to_paths(only: :cask)
                                        .any?(&:exist?)
           odie "Found casks but did not find formulae!"
         end
-    formula_paths.each(&method(:puts))
+        formula_paths.each { puts _1 }
+      end
+    end
   end
 end

Library/Homebrew/test/dev-cmd/formula_spec.rb

@@ -1,9 +1,10 @@
 # frozen_string_literal: true
 
 require "cmd/shared_examples/args_parse"
+require "dev-cmd/formula"
 
-RSpec.describe "brew formula" do
-  it_behaves_like "parseable arguments"
+RSpec.describe Homebrew::DevCmd::FormulaCmd do
+  it_behaves_like "parseable arguments", argv: ["foo"]
 
   it "prints a given Formula's path", :integration_test do
     formula_file = setup_test_formula "testball"