Port Homebrew::Cmd::Cache

Library/Homebrew/cmd/--cache.rb

@@ -1,16 +1,19 @@
 # typed: strict
 # frozen_string_literal: true
 
+require "abstract_command"
 require "fetch"
-require "cli/parser"
 require "cask/download"
 
 module Homebrew
-  extend Fetch
+  module Cmd
+    class Cache < AbstractCommand
+      include Fetch
 
-  sig { returns(CLI::Parser) }
-  def self.__cache_args
-    Homebrew::CLI::Parser.new do
+      sig { override.returns(String) }
+      def self.command_name = "--cache"
+
+      cmd_args do
         description <<~EOS
           Display Homebrew's download cache. See also `HOMEBREW_CACHE`.
 
@@ -42,12 +45,9 @@ module Homebrew
 
         named_args [:formula, :cask]
       end
-  end
-
-  sig { void }
-  def self.__cache
-    args = __cache_args.parse
 
+      sig { override.void }
+      def run
         if args.no_named?
           puts HOMEBREW_CACHE
           return
@@ -65,10 +65,10 @@ module Homebrew
             os_arch_combinations.each do |os, arch|
               SimulateSystem.with(os:, arch:) do
                 formula = Formulary.factory(ref)
-            print_formula_cache(formula, os:, arch:, args:)
+                print_formula_cache(formula, os:, arch:)
               end
             end
-      else
+          when Cask::Cask
             cask = formula_or_cask
             ref = cask.loaded_from_api? ? cask.full_name : cask.sourcefile_path
 
@@ -76,16 +76,20 @@ module Homebrew
               next if os == :linux
 
               SimulateSystem.with(os:, arch:) do
-            cask = Cask::CaskLoader.load(ref)
-            print_cask_cache(cask)
+                loaded_cask = Cask::CaskLoader.load(ref)
+                print_cask_cache(loaded_cask)
               end
             end
+          else
+            raise "Invalid type: #{formula_or_cask.class}"
           end
         end
       end
 
-  sig { params(formula: Formula, os: Symbol, arch: Symbol, args: CLI::Args).void }
-  def self.print_formula_cache(formula, os:, arch:, args:)
+      private
+
+      sig { params(formula: Formula, os: Symbol, arch: Symbol).void }
+      def print_formula_cache(formula, os:, arch:)
         if fetch_bottle?(
           formula,
           force_bottle:               args.force_bottle?,
@@ -116,7 +120,9 @@ module Homebrew
       end
 
       sig { params(cask: Cask::Cask).void }
-  def self.print_cask_cache(cask)
+      def print_cask_cache(cask)
         puts Cask::Download.new(cask).downloader.cached_location
       end
+    end
+  end
 end

Library/Homebrew/test/cmd/--cache_spec.rb

@@ -1,8 +1,9 @@
 # frozen_string_literal: true
 
+require "cmd/--cache"
 require "cmd/shared_examples/args_parse"
 
-RSpec.describe "brew --cache" do
+RSpec.describe Homebrew::Cmd::Cache do
   it_behaves_like "parseable arguments"
 
   it "prints all cache files for a given Formula", :integration_test do