Class: CommandDispatcher::Dispatcher

Inherits:
Object
  • Object
show all
Defined in:
lib/command-dispatcher.rb

Overview

Constant Summary collapse

EX_NOCMD = 
"No command specified"
EX_INVALCMD = 
"is not a valid command"

Instance Method Summary collapse

Constructor Details

#initialize(rootScriptAbsLocation, rootScriptName) ⇒ Dispatcher 



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# File 'lib/command-dispatcher.rb', line 11

def initialize(rootScriptAbsLocation, rootScriptName)
  @rootScriptAbsLocation = rootScriptAbsLocation
  @rootScriptName = rootScriptName
  @commandPrefix = rootScriptAbsLocation + '/' + rootScriptName + '-';
end

Instance Method Details

#dispatchCommand(cmd, *arguments) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/command-dispatcher.rb', line 33

def dispatchCommand(cmd, *arguments)

  raise ArgumentError.new(EX_NOCMD) if cmd == nil
  raise ArgumentError.new("#{cmd} " + EX_INVALCMD) unless isValid?(cmd)

  exec(@commandPrefix + cmd, *arguments)
end

#isValid?(command) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/command-dispatcher.rb', line 43

def isValid?(command)
  return false if (!File.exists?(@commandPrefix + command))
  return true
end

#usage ⇒ Object 



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# File 'lib/command-dispatcher.rb', line 19

def usage()
  Dir.glob(@commandPrefix + '*').each do |f|
    tmp=f.slice(@commandPrefix.size, f.size)
    invalid=tmp.include? "-"
    if !invalid
      help = `#{f} --usage`
      command = File.basename(f).gsub!( "-", " " )
      $stdout.puts command.ljust(25)  + " : " + help 
    end 
  end
end