Enable strict typing in CLI::Parser

Library/Homebrew/abstract_command.rb

@@ -26,6 +26,9 @@ def command_name = Utils.underscore(T.must(name).split("::").fetch(-1)).tr("_",
       sig { params(name: String).returns(T.nilable(T.class_of(AbstractCommand))) }
       def command(name) = subclasses.find { _1.command_name == name }
 
+      sig { returns(T::Boolean) }
+      def dev_cmd? = T.must(name).start_with?("Homebrew::DevCmd")
+
       sig { returns(CLI::Parser) }
       def parser = CLI::Parser.new(self, &@parser_block)
 

Library/Homebrew/brew.rb

@@ -136,17 +136,17 @@
   end
 rescue UsageError => e
   require "help"
-  Homebrew::Help.help cmd, remaining_args: args.remaining, usage_error: e.message
+  Homebrew::Help.help cmd, remaining_args: T.must(args).remaining, usage_error: e.message
 rescue SystemExit => e
-  onoe "Kernel.exit" if args.debug? && !e.success?
+  onoe "Kernel.exit" if T.must(args).debug? && !e.success?
   $stderr.puts Utils::Backtrace.clean(e) if args&.debug? || ARGV.include?("--debug")
   raise
 rescue Interrupt
   $stderr.puts # seemingly a newline is typical
   exit 130
 rescue BuildError => e
   Utils::Analytics.report_build_error(e)
-  e.dump(verbose: args&.verbose?)
+  e.dump(verbose: args&.verbose? || false)
 
   if OS.unsupported_configuration?
     $stderr.puts "#{Tty.bold}Do not report this issue: you are running in an unsupported configuration.#{Tty.reset}"

Library/Homebrew/cli/args.rbi

@@ -14,6 +14,9 @@ class Homebrew::CLI::Args
   sig { returns(T::Boolean) }
   def quiet?; end
 
+  sig { returns(T::Array[String]) }
+  def remaining; end
+
   sig { returns(T::Boolean) }
   def verbose?; end
 end