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 31

def backend
  @@backend ||= usable_backend
end

.carbon_core? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 47

def carbon_core?
  begin
    require 'osx/foundation'
    OSX.require_framework '/System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework'
    true
  rescue LoadError
    false
  end
end

.jruby? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 35

def jruby?
  defined?(JRUBY_VERSION)
end

.linux? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 43

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

.mac? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 39

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

.rb_fsevent? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 57

def rb_fsevent?
  begin
    require 'rb-fsevent'
    true
  rescue LoadError
    false
  end
end

.rb_inotify? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fssm/support.rb', line 66

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
  choice = case
             when mac? && !jruby? && carbon_core?
               'FSEvents'
             when mac? && rb_fsevent?
               'RBFSEvent'
             when linux? && rb_inotify?
               'Inotify'
             else
               'Polling'
           end

  if (mac? || linux?) && choice == 'Polling'
    optimal = case
                when mac?
                  'rb-fsevent'
                when linux?
                  'rb-inotify'
              end
    STDERR.puts("FSSM: An optimized backend is available for this platform!")
    STDERR.puts("    gem install #{optimal}")
  end

  choice
end

.use_block(context, block) ⇒ Object 



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# File 'lib/fssm/support.rb', line 78

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