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) }
+      cmd_args do
-  def formula_args
+        description <<~EOS
-    Homebrew::CLI::Parser.new do
+          Display the path where <formula> is located.
-      description <<~EOS
+        EOS
-        Display the path where <formula> is located.
-      EOS
 
-      named_args :formula, min: 1, without_api: true
+        named_args :formula, min: 1, without_api: true
+      end
+
+      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 { puts _1 }
+      end
     end
   end
-
-  def formula
-    args = formula_args.parse
-
-    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))
-  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
+RSpec.describe Homebrew::DevCmd::FormulaCmd do
-  it_behaves_like "parseable arguments"
+  it_behaves_like "parseable arguments", argv: ["foo"]
 
   it "prints a given Formula's path", :integration_test do
     formula_file = setup_test_formula "testball"