rdbg

#!/usr/bin/env ruby

require_relative '../lib/debug/config'
config = DEBUGGER__::Config::parse_argv(ARGV)

# mode is not an actual configuration option
# it's only used to carry the result of parse_argv here
case config.delete(:mode)
when :start
  require 'rbconfig'

  libpath = File.join(File.expand_path(File.dirname(__dir__)), 'lib/debug')
  start_mode = config[:open] ? "open" : 'start'
  cmd = config[:command] ? ARGV.shift : (ENV['RUBY'] || RbConfig.ruby)

  if defined?($:.resolve_feature_path)
    begin
      _, sopath = $:.resolve_feature_path('debug/debug.so')
    rescue LoadError
      # raises LoadError before 3.1 (2.7 and 3.0)
    else
      sopath = File.dirname(File.dirname(sopath)) if sopath
    end
  else
    # `$:.resolve_feature_path` is not defined in 2.6 or earlier.
    so = "debug/debug.#{RbConfig::CONFIG['DLEXT']}"
    sopath = $:.find {|dir| File.exist?(File.join(dir, so))}
  end
  added = "-r #{libpath}/#{start_mode}"
  added = "-I #{sopath} #{added}" if sopath
  rubyopt = ENV['RUBYOPT']
  env = ::DEBUGGER__::Config.config_to_env_hash(config)
  env['RUBY_DEBUG_ADDED_RUBYOPT'] = added
  env['RUBYOPT'] = "#{rubyopt} #{added}"

  exec(env, cmd, *ARGV)

when :attach
  require_relative "../lib/debug/client"
  ::DEBUGGER__::CONFIG.set_config(**config)

  begin
    if ARGV.empty? && config[:port]
      DEBUGGER__::Client.new([config[:host], config[:port]].compact).connect
    else
      DEBUGGER__::Client.new(ARGV).connect
    end
  rescue DEBUGGER__::CommandLineOptionError
    puts opt.help
  end
else
  raise # assert
end