Class: CrontabWrap

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

Overview

Crontab wrapper class

Constant Summary collapse

BACKUP_FILE = 
'.crontab'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(param = {}) ⇒ CrontabWrap

construct object

default BACKUP_FILE is ~/.crontab



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# File 'lib/crontabwrap.rb', line 16

def initialize( param = {} )
  @opt = {
    :debug => false,
    :argv  => ARGV
  }.merge( param )
  @user = ENV['USER']

  parse_args( @opt[:argv] )
end

Instance Attribute Details

#user ⇒ Object (readonly)

Returns the value of attribute user.



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# File 'lib/crontabwrap.rb', line 25

def user
  @user
end

Instance Method Details

#backup(argv) ⇒ Object

backup crontab content for each user



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# File 'lib/crontabwrap.rb', line 68

def backup( argv )
  argv = replace_switch_to_display( argv )

  exec( argv, " > #{backup_file( @user )}" )
end

#backup_file(user) ⇒ Object

backup file name for crontab content



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# File 'lib/crontabwrap.rb', line 89

def backup_file( user )
  return "~#{user}/#{BACKUP_FILE}"
end

#echo(argv, opt = '') ⇒ Object 



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# File 'lib/crontabwrap.rb', line 56

def echo( argv, opt = '' )
  STDERR.puts 'crontab ' + argv.join( " " ) + opt
end

#exec(argv, opt = '') ⇒ Object 



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# File 'lib/crontabwrap.rb', line 60

def exec( argv, opt = '' )
  echo( argv, " > #{backup_file( @user )}" ) if ( @opt[:debug] )
  system( 'crontab ' + argv.join( " " ) + opt )
end

#parse_args(argv) ⇒ Object

parse command line args



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# File 'lib/crontabwrap.rb', line 45

def parse_args( argv )
  opt = OptionParser.new()
  opt.on( '-u USER' ) { |user|
    @user = user
  }
  begin
    opt.parse( argv )
  rescue
  end
end

#replace_switch_to_display(opts) ⇒ Object

replace ‘-e’ option to ‘-l’

Param

Array opts

Return

Array



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

def replace_switch_to_display( opts )
  opts.map { |opt|
    ( opt == '-e' ) ? '-l' : opt
  }
end

#run ⇒ Object

take all options to crontab

do backup if ‘-e’ option given



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# File 'lib/crontabwrap.rb', line 32

def run
  argv = @opt[:argv]

  if ( exec( argv ) )
    if ( argv.include?( '-e' ) )
      backup( argv )
    end
  end
end