Module: FSSM::Support

Defined in:
lib/fssm/support.rb

Class Method Summary collapse

Class Method Details

.backend ⇒ Object 



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# File 'lib/fssm/support.rb', line 24

def backend
  @@backend ||= usable_backend
end

.jruby? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 28

def jruby?
  defined?(JRUBY_VERSION)
end

.linux? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 40

def linux?
  RbConfig::CONFIG['target_os'] =~ /linux/i
end

.lion? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 36

def lion?
  RbConfig::CONFIG['target_os'] =~ /darwin11/i
end

.mac? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 32

def mac?
  RbConfig::CONFIG['target_os'] =~ /darwin/i
end

.optimal_backend_dependency ⇒ Object 



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# File 'lib/fssm/support.rb', line 16

def optimal_backend_dependency
  return case
    when mac?     then  ['rb-fsevent', '>= 0.4.3.1']
    when linux?   then  ['rb-inotify', '>= 0.8.8']
    else                [nil, nil]
  end
end

.rb_fsevent? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 44

def rb_fsevent?
  begin
    require 'rb-fsevent'
    defined?(FSEvent::VERSION) ? FSEvent::VERSION.to_f >= 0.4 : false
  rescue LoadError
    false
  end
end

.rb_inotify? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 53

def rb_inotify?
  begin
    require 'rb-inotify'
    if defined?(INotify::VERSION)
      version = INotify::VERSION
      version[0] > 0 || version[1] >= 6
    end
  rescue LoadError
    false
  end
end

.usable_backend ⇒ Object 



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# File 'lib/fssm/support.rb', line 5

def usable_backend
  case
    when mac? && rb_fsevent?
      'RBFSEvent'
    when linux? && rb_inotify?
      'Inotify'
    else
      'Polling'
  end
end

.use_block(context, block) ⇒ Object 



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# File 'lib/fssm/support.rb', line 65

def use_block(context, block)
  return if block.nil?
  if block.arity == 1
    block.call(context)
  else
    context.instance_eval(&block)
  end
end