class PhusionPassenger::Config::AboutCommand

def self.help
  puts "Usage: passenger-config about <SUBCOMMAND>"
  puts
  puts "  Show information about #{PROGRAM_NAME}."
  puts
  puts "Available subcommands:"
  puts "  root                     Show #{PROGRAM_NAME}'s root."
  puts "  ruby-libdir              Show #{PROGRAM_NAME}'s Ruby library directory."
  puts "  includedir               Show the Nginx runtime library headers directory."
  puts "  nginx-addon-dir          Show #{PROGRAM_NAME}'s Nginx addon directory."
  puts "  nginx-libs               Show Nginx runtime library flags."
  puts "  resourcesdir             Show #{PROGRAM_NAME}'s resources directory."
  puts "  compiled                 Check whether runtime libraries are compiled."
  puts "  custom-packaged          Check whether Phusion Passenger is custom"
  puts "                           packaged."
  puts "  installed-from-release-package  Check whether this installation came from"
  puts "                                  an official release package."
  puts "  make-locations-ini       Generate a locations.ini based on the current"
  puts "                           install paths."
  puts "  detect-apache2           Autodetect Apache installations."
  puts "  ruby-command             Show the correct command for invoking the Ruby"
  puts "                           interpreter."
  puts "  rubyext-compat-id        Show the Ruby extension binary compatibility ID."
  puts "  cxx-compat-id            Show the C++ binary compatibility ID."
  puts "  version                  Show the version number."
end

def common_library
  PhusionPassenger.require_passenger_lib 'common_library'
  return COMMON_LIBRARY.
    only(*NGINX_LIBS_SELECTOR).
    set_output_dir("#{PhusionPassenger.lib_dir}/common/libpassenger_common")
end

def run
  PhusionPassenger.require_passenger_lib 'platform_info'
  PhusionPassenger.require_passenger_lib 'platform_info/compiler'
  subcommand = @argv[0].to_s.dup
  # Compatibility with version <= 4.0.29: accept both
  # 'subcommand' and '--subcommand'.
  subcommand = "--#{subcommand}" if subcommand !~ /^--/
  case subcommand
  when "--root"
    puts PhusionPassenger.install_spec
  when "--ruby-libdir"
    puts PhusionPassenger.ruby_libdir
  when "--includedir"
    puts PhusionPassenger.include_dir
  when "--nginx-addon-dir"
    puts PhusionPassenger.nginx_module_source_dir
  when "--nginx-libs"
    puts "#{common_library.link_objects_as_string} #{PhusionPassenger.lib_dir}/common/libboost_oxt.a"
  when "--resourcesdir"
    puts PhusionPassenger.resources_dir
  when "--compiled"
    common_library.link_objects.each do |filename|
      if !File.exist?(filename)
        exit 1
      end
    end
    if File.exist?("#{PhusionPassenger.lib_dir}/common/libboost_oxt.a")
      exit 0
    else
      exit 1
    end
  when "--custom-packaged"
    if PhusionPassenger.custom_packaged?
      exit 0
    else
      exit 1
    end
  when "--installed-from-release-package"
    if PhusionPassenger.installed_from_release_package?
      exit 0
    else
      exit 1
    end
  when "--make-locations-ini"
    if @argv[1] =~ /^--for-(native-)?packaging-method=(.*)/
      packaging_method = $2
    else
      packaging_method = nil
    end
    puts "[locations]"
    if packaging_method
      puts "packaging_method=#{packaging_method}"
    else
      if PhusionPassenger.custom_packaged?
        puts "packaging_method=#{PhusionPassenger.packaging_method}"
      else
        puts "packaging_method=unknown"
      end
    end
    PhusionPassenger::REQUIRED_LOCATIONS_INI_FIELDS.each do |field|
      puts "#{field}=#{PhusionPassenger.send(field)}"
    end
    PhusionPassenger::OPTIONAL_LOCATIONS_INI_FIELDS.each do |field|
      value = PhusionPassenger.send(field)
      puts "#{field}=#{value}" if value
    end
  when "--detect-apache2"
    PhusionPassenger.require_passenger_lib 'platform_info/apache_detector'
    detector = PhusionPassenger::PlatformInfo::ApacheDetector.new(STDOUT)
    STDOUT.write(Utils::AnsiColors::DEFAULT_TERMINAL_COLOR)
    STDOUT.flush
    begin
      detector.detect_all
      detector.report
    ensure
      detector.finish
      STDOUT.write(Utils::AnsiColors::RESET)
      STDOUT.flush
    end
  when "--ruby-command"
    PhusionPassenger.require_passenger_lib 'platform_info/ruby'
    ruby = PhusionPassenger::PlatformInfo.ruby_command
    puts "passenger-config was invoked through the following Ruby interpreter:"
    puts "  Command: #{ruby}"
    STDOUT.write "  Version: "
    STDOUT.flush
    system("/bin/sh -c '#{ruby} -v'")
    puts "  To use in Apache: PassengerRuby #{ruby}"
    puts "  To use in Nginx : passenger_ruby #{ruby}"
    puts "  To use with Standalone: #{ruby} #{PhusionPassenger.bin_dir}/passenger start"
    puts
    ruby = PhusionPassenger::PlatformInfo.find_command('ruby')
    if ruby && !ruby.include?("rvm/rubies/")
      # If this is an RVM Ruby executable then we don't show it. We want people to
      # use the RVM wrapper scripts only.
      puts "The following Ruby interpreter was found first in $PATH:"
      puts "  Command: #{ruby}"
      STDOUT.write "  Version: "
      STDOUT.flush
      system("/bin/sh -c '#{ruby} -v'")
      puts "  To use in Apache: PassengerRuby #{ruby}"
      puts "  To use in Nginx : passenger_ruby #{ruby}"
      puts "  To use with Standalone: #{ruby} #{PhusionPassenger.bin_dir}/passenger start"
    elsif !ruby.include?("rvm/rubies/")
      puts "No Ruby interpreter found in $PATH."
    end
    puts
    puts "## Notes for RVM users"
    puts "Do you want to know which command to use for a different Ruby interpreter? 'rvm use' that Ruby interpreter, then re-run 'passenger-config --ruby-command'."
  when "--rubyext-compat-id"
    PhusionPassenger.require_passenger_lib 'platform_info/binary_compatibility'
    puts PhusionPassenger::PlatformInfo.ruby_extension_binary_compatibility_id
  when "--cxx-compat-id"
    PhusionPassenger.require_passenger_lib 'platform_info/binary_compatibility'
    puts PhusionPassenger::PlatformInfo.cxx_binary_compatibility_id
  when "--version"
    if defined?(PhusionPassenger::PASSENGER_IS_ENTERPRISE)
      name = "#{PhusionPassenger::PROGRAM_NAME} Enterprise"
    else
      name = PhusionPassenger::PROGRAM_NAME
    end
    puts "#{name} #{PhusionPassenger::VERSION_STRING}"
  when "--help"
    self.class.help
  else
    self.class.help
    exit 1
  end
end