Class: Balmora::Command

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

Defined Under Namespace

Classes: Commands, Error, Exec, File, Files, Link, Links, Pacman, ReloadConfig, Restart, SetVariable, Stop, Yaourt

Instance Method Summary collapse

Constructor Details

#initialize(state, command) ⇒ Command

Returns a new instance of Command.



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# File 'lib/balmora/command.rb', line 5

def initialize(state, command)
  @state = state

  @logger = state.logger
  @shell = state.shell
  @config = state.config
  @contexts = state.contexts
  @variables = state.variables
  @balmora = state.balmora

  @command = command
end

Instance Method Details

#_execute ⇒ Object 



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# File 'lib/balmora/command.rb', line 54

def _execute()
  if @command.instance_of?(::Hash) && !@contexts.check(@command[:context])
    @logger.debug("Skip: #{@command.inspect()}")
    return
  end

  init()

  if !@require.nil?()
    option(:require).each() { |file|
      require file
    }
  end

  @logger.debug("Run: #{@command.inspect()}")

  execute = self.method(:run)

  if !@sudo.nil?()
    execute_sudo = execute
    execute = Proc.new() {
      @shell.sudo!(option(:sudo)) {
        execute_sudo.call()
      }
    }
  end

  execute.call()
rescue => error
  @logger.error("#{error.inspect()}; failed to run " +
    "command: #{@command.inspect()}")

  if @fallback
    @logger.debug("Executing fallback for command #{@command.inspect()}")
    @balmora.execute(@fallback)
  end

  if option(:ignore_error) == true
    return
  end

  raise error
end

#execute ⇒ Object 



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# File 'lib/balmora/command.rb', line 41

def execute()
  if @command.has_key?(:chdir)
    dir = @command[:chdir]
    dir = @variables.inject(dir)
    dir = @shell.expand(dir)
    Dir.chdir(dir) {
      _execute()
    }
  else
    _execute()
  end
end

#init ⇒ Object 



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# File 'lib/balmora/command.rb', line 18

def init()
  if (@command.keys() - [:command] - options()).length != 0
    raise Error.new("Unknown options #{(@command.keys() - [:command] -
      options()).inspect()}")
  end

  options().each() { |key|
    if self.instance_variable_defined?(:"@#{key}")
      raise Error.new("Can not use #{key} as option")
    end

    option = @command.fetch(key, nil)
    self.instance_variable_set(:"@#{key}", option)
  }

  verify()
end

#option(option) ⇒ Object 



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# File 'lib/balmora/command.rb', line 102

def option(option)
  return @variables.inject(self.instance_variable_get(:"@#{option}"))
end

#options ⇒ Object 



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# File 'lib/balmora/command.rb', line 36

def options()
  return [:ignore_error, :fallback, :extensions, :sudo, :context, :chdir,
    :require]
end

#run ⇒ Object

Raises:



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# File 'lib/balmora/command.rb', line 98

def run()
  raise Error.new("Run should be implemented in subclass")
end