Port Homebrew::Cmd::Link

Library/Homebrew/cmd/link.rb

@@ -1,16 +1,14 @@
 # typed: true
 # frozen_string_literal: true
 
+require "abstract_command"
 require "caveats"
-require "cli/parser"
 require "unlink"
 
 module Homebrew
-  module_function
-
-  sig { returns(CLI::Parser) }
-  def link_args
-    Homebrew::CLI::Parser.new do
+  module Cmd
+    class Link < AbstractCommand
+      cmd_args do
         description <<~EOS
           Symlink all of <formula>'s installed files into Homebrew's prefix.
           This is done automatically when you install formulae but can be useful
@@ -28,11 +26,9 @@ module Homebrew
 
         named_args :installed_formula, min: 1
       end
-  end
-
-  def link
-    args = link_args.parse
 
+      sig { override.void }
+      def run
         options = {
           overwrite: args.overwrite?,
           dry_run:   args.dry_run?,
@@ -86,7 +82,8 @@ module Homebrew
           end
 
           if keg_only
-        if HOMEBREW_PREFIX.to_s == HOMEBREW_DEFAULT_PREFIX && formula.present? && formula.keg_only_reason.by_macos?
+            if HOMEBREW_PREFIX.to_s == HOMEBREW_DEFAULT_PREFIX && formula.present? &&
+               formula.keg_only_reason.by_macos?
               caveats = Caveats.new(formula)
               opoo <<~EOS
                 Refusing to link macOS provided/shadowed software: #{keg.name}
@@ -122,6 +119,8 @@ module Homebrew
         end
       end
 
+      private
+
       def puts_keg_only_path_message(keg)
         bin = keg/"bin"
         sbin = keg/"sbin"
@@ -132,4 +131,6 @@ module Homebrew
         puts "  #{Utils::Shell.prepend_path_in_profile(opt/"bin")}"  if bin.directory?
         puts "  #{Utils::Shell.prepend_path_in_profile(opt/"sbin")}" if sbin.directory?
       end
+    end
+  end
 end

Library/Homebrew/test/cmd/link_spec.rb

@@ -1,8 +1,9 @@
 # frozen_string_literal: true
 
+require "cmd/link"
 require "cmd/shared_examples/args_parse"
 
-RSpec.describe "brew link" do
+RSpec.describe Homebrew::Cmd::Link do
   it_behaves_like "parseable arguments"
 
   it "links a given Formula", :integration_test do