Class: PerfMonger::CLI::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/perfmonger/cli.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/perfmonger/cli.rb', line 27

def initialize

end

Class Method Details

.register_alias(alias_name, command_name) ⇒ Object 



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# File 'lib/perfmonger/cli.rb', line 15

def self.register_alias(alias_name, command_name)
  if @@commands.nil?
    raise RuntimeError.new("No command is registered yet.")
  end

  if ! @@commands.has_key?(command_name)
    raise RuntimeError.new("Command '#{command_name}' is not registered.")
  end

  @@aliases[alias_name] = command_name
end

.register_command(command_name, klass) ⇒ Object 



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# File 'lib/perfmonger/cli.rb', line 8

def self.register_command(command_name, klass)
  @@commands ||= Hash.new
  @@aliases ||= Hash.new

  @@commands[command_name] = klass
end

Instance Method Details

#run(argv = ARGV) ⇒ Object 



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# File 'lib/perfmonger/cli.rb', line 31

def run(argv = ARGV)
  parser = OptionParser.new
  parser.banner = "Usage: \#{File.basename($0)} [options] COMMAND [args]\n\n"

  ## make list of subcommands
  commands = @@commands.values.sort_by do |command|
    # important command first: sort by [priority, name]
    command_name = command.command_name
    case command_name
    when "live"
      [0, command_name]
    when "record"
      [1, command_name]
    when "play"
      [2, command_name]
    when "stat"
      [3, command_name]
    when "plot"
      [4, command_name]
    else
      [999, command_name]
    end
  end

  max_len = commands.map(&:command_name).map(&:size).max
  command_list_str = commands.map do |command|
    # pad command names
    command_name = command.command_name
    command_name = command_name + (" " * (max_len - command_name.size))

    str = "    " + command_name + "   " + command.description

    if command.aliases && command.aliases.size > 0
      str += "\n" + "    " + (" " * max_len) + "   " +
        "Aliases: " + command.aliases.join(", ")
    end

    str
  end.join("\n")

  subcommand_list = "\nCommands:\n\#{command_list_str}\n\n"

  parser.summary_indent = "  "

  parser.on('-h', '--help', 'Show this help') do
    puts(parser.help)
    puts(subcommand_list)
    exit(true)
  end

  parser.on('-v', '--version', 'Show version number') do
    puts("PerfMonger version " + PerfMonger::VERSION)
    exit(true)
  end

  parser.order!(argv)

  if argv.size == 0
    puts(parser.help)
    puts(subcommand_list)
    exit(false)
  end

  command_name = argv.shift

  if @@aliases[command_name]
    command_name = @@aliases[command_name]
  end
  command_class = @@commands[command_name]

  unless command_class
    puts("No such command: #{command_name}")
    puts(subcommand_list)
    exit(false)
  end

  command_class.new.run(argv)
end