# typed: true
# frozen_string_literal: true

require "cli/parser"

module Homebrew
  extend T::Sig

  module_function

  sig { returns(CLI::Parser) }
  def ruby_args
    Homebrew::CLI::Parser.new do
      usage_banner "`ruby` [<options>] (`-e` <text>|<file>)"
      description <<~EOS
        Run a Ruby instance with Homebrew's libraries loaded. For example,
        `brew ruby -e "puts :gcc.f.deps"` or `brew ruby script.rb`.

        Run e.g. `brew ruby -- --version` to pass arbitrary arguments to `ruby`.
      EOS
      flag "-r=",
           description: "Load a library using `require`."
      flag "-e=",
           description: "Execute the given text string as a script."

      named_args :file
    end
  end

  def ruby
    args = ruby_args.parse

    ruby_sys_args = []
    ruby_sys_args << "-r#{args.r}" if args.r
    ruby_sys_args << "-e #{args.e}" if args.e
    ruby_sys_args += args.named

    exec(*HOMEBREW_RUBY_EXEC_ARGS,
         "-I", $LOAD_PATH.join(File::PATH_SEPARATOR),
         "-rglobal", "-rdev-cmd/irb",
         *ruby_sys_args)
  end
end