class TaskJuggler::Tj3AppBase

# File lib/taskjuggler/Tj3AppBase.rb, line 29
def initialize
  # Indent and width of options. The deriving class may has to change
  # this.
  @optsSummaryWidth = 22
  @optsSummaryIndent = 5
  # Show some progress information by default
  @silent = false
  @configFile = nil
  @mandatoryArgs = ''
  @mininumRubyVersion = '1.9.2'

  # If stdout is not a tty, we don't use ANSI escape sequences to color
  # the terminal output. Additionally, we have the --no-color option to
  # force colors off in case this does not work properly.
  Term::ANSIColor.coloring = STDOUT.tty?

  # Make sure the MessageHandler is set to default values.
  MessageHandlerInstance.instance.reset
end

# File lib/taskjuggler/Tj3AppBase.rb, line 123
def main(argv = ARGV)
  if Gem::Version.new(RUBY_VERSION.dup) <
     Gem::Version.new(@mininumRubyVersion)
    error('tj3app_ruby_version',
          'This program requires at least Ruby version ' +
          "#{@mininumRubyVersion}!")
  end

  # Install signal handler to exit gracefully on CTRL-C.
  intHandler = Kernel.trap('INT') do
    begin
      fatal('tj3app_user_abort', "Aborting on user request!")
    rescue RuntimeError
      exit 1
    end
  end

  retVal = 0
  begin
    args = processArguments(argv)

    # If DEBUG mode has been enabled, we restore the INT trap handler again
    # to get Ruby backtraces.
    Kernel.trap('INT', intHandler) if $DEBUG

    unless @silent
      puts "#{AppConfig.softwareName} v#{AppConfig.version} - " +
           "#{AppConfig.packageInfo}\n\n" +
           "Copyright (c) #{AppConfig.copyright.join(', ')}\n" +
           "              by #{AppConfig.authors.join(', ')}\n\n" +
           "#{AppConfig.license}\n"
    end

    @rc = RuntimeConfig.new(AppConfig.packageName, @configFile)

    begin
      MessageHandlerInstance.instance.trapSetup = true
      retVal = appMain(args)
      MessageHandlerInstance.instance.trapSetup = false
    rescue TjRuntimeError
      # We have hit a situation that we can't recover from. A message
      # was severed via the MessageHandler to inform the user and we now
      # abort the program.
      return 1
    end

  rescue Exception => e
    if e.is_a?(SystemExit) || e.is_a?(Interrupt)
      # Don't show backtrace on user interrupt unless we are in debug mode.
      $stderr.puts e.backtrace.join("\n") if $DEBUG
      1
    else
      fatal('crash_trap', "#{e}\n#{e.backtrace.join("\n")}\n\n" +
            "#{'*' * 79}\nYou have triggered a bug in " +
            "#{AppConfig.softwareName} version #{AppConfig.version}!\n" +
            "Please see the user manual on how to get this bug fixed!\n" +
            "http://www.taskjuggler.org/tj3/manual/Reporting_Bugs.html#" +
            "Reporting_Bugs_and_Feature_Requests\n" +
            "#{'*' * 79}\n")
    end
  end

  # Exit value in case everything was fine.
  retVal
end

# File lib/taskjuggler/Tj3AppBase.rb, line 49
    def processArguments(argv)
      @opts = OptionParser.new
      @opts.summary_width = @optsSummaryWidth
      @opts.summary_indent = ' ' * @optsSummaryIndent

      @opts.banner = "Copyright (c) #{AppConfig.copyright.join(', ')}\n" +
                     "              by #{AppConfig.authors.join(', ')}\n\n" +
                     "#{AppConfig.license}\n" +
                     "For more info about #{AppConfig.softwareName} see " +
                     "#{AppConfig.contact}\n\n" +
                     "Usage: #{AppConfig.appName} [options] " +
                     "#{@mandatoryArgs}\n\n"

      @opts.separator "\nOptions:"
      @opts.on('-c', '--config <FILE>', String,
               format('Use the specified YAML configuration file')) do |arg|
         @configFile = arg
      end
      @opts.on('--silent',
               format("Don't show program and progress information")) do
        @silent = true
        MessageHandlerInstance.instance.outputLevel = :warning
        TaskJuggler::Log.silent = true
      end
      @opts.on('--no-color',
               format(<<'EOT'
Don't use ANSI contol sequences to color the terminal output. Colors should
only be used when spooling to an ANSI terminal. In case the detection fails,
you can use this option to force colors to be off.
EOT
                     )) do
        Term::ANSIColor::coloring = false
      end
      @opts.on('--debug', format('Enable Ruby debug mode')) do
        $DEBUG = true
      end

      yield

      @opts.on_tail('-h', '--help', format('Show this message')) do
        puts @opts.to_s
        quit
      end
      @opts.on_tail('--version', format('Show version info')) do
# Display the software name and version in GNU format
# as expected by help2man
# https://www.gnu.org/prep/standards/standards.html#g_t_002d_002dversion
        puts "#{AppConfig.appName} (#{AppConfig.softwareName}) #{AppConfig.version}\n"
# To also display the copyright and license statements in GNU format
# uncomment the following and remove the equivalent statements from
# --help
# +
#<<'EOT'
#Copyright (C) 2016 Chris Schlaeger <cs@taskjuggler.org>
#License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>
#This is free software; you can redistribute it and/or modify it under
#the terms of version 2 of the GNU General Public License as published by the
#Free Software Foundation.
#
#For more info about TaskJuggler see http://www.taskjuggler.org
#EOT
        quit
      end

      begin
        files = @opts.parse(argv)
      rescue OptionParser::ParseError => msg
        puts @opts.to_s + "\n"
        error('tj3app_bad_cmd_options', msg.message)
      end

      files
    end