Class: Aef::Init

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

Overview

Clean and simple *nix init scripts with Ruby

Constant Summary collapse

VERSION = 
'1.0.0'

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.default_command(command) ⇒ Object

Set a default command to be called if no command is specified on the commandline.



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# File 'lib/init/init.rb', line 65

def self.default_command(command)
  @@default_command = command
end

.parse ⇒ Object

Call this to begin commandline parsing

If an invalid command is specified on the commandline, a usage example is displayed. If no command is specified, the default command is started



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# File 'lib/init/init.rb', line 28

def self.parse
  command = ARGV.shift || :default

  valid_commands = []

  self.ancestors.each do |klass|
    valid_commands += klass.public_instance_methods(false)
    break if klass == Aef::Init
  end

  valid_commands.uniq!

  @@default_command ||= 'restart'
  @@stop_start_delay ||= 0

  # This is neccessary because since ruby 1.9, the instance_methods method
  # returns an array of symbols instead of an array of strings which it did
  # in 1.8
  command = command.to_sym if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('1.9')

  if command == :default
    new.send(@@default_command)
  elsif valid_commands.include?(command)
    new.send(command)
  else
    puts "Usage: #$PROGRAM_NAME {#{valid_commands.sort.join('|')}}"; exit false
  end
end

.stop_start_delay(seconds) ⇒ Object

Set a delay in seconds between the call of the stop and the start method in the predefined restart method



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# File 'lib/init/init.rb', line 59

def self.stop_start_delay(seconds)
  @@stop_start_delay = seconds
end

Instance Method Details

#restart ⇒ Object

By default restart simply calls stop and then start



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# File 'lib/init/init.rb', line 80

def restart
  stop
  sleep @@stop_start_delay
  start
end

#start ⇒ Object

The start method needs to be implemented in a subclass



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# File 'lib/init/init.rb', line 70

def start
  warn 'start method needs to be implemented'; exit false
end

#stop ⇒ Object

The stop method needs to be implemented in a subclass



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# File 'lib/init/init.rb', line 75

def stop
  warn 'stop method needs to be implemented'; exit false
end