Module: RunCommand

Included in:
DF, MPstat, Netstat, PS
Defined in:
lib/city_watch/util/run_command.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/city_watch/util/run_command.rb', line 81

def self.included(base)
  base.extend(ClassMethods)
  Commands.register(base)
end

Instance Method Details

#command_line ⇒ Object 



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# File 'lib/city_watch/util/run_command.rb', line 17

def command_line
  @command ||= "#{options[:command]} #{command_line_opts}#{options[:grep] && " | fgrep #{options[:grep]}"}"
end

#command_line_opts ⇒ Object 



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# File 'lib/city_watch/util/run_command.rb', line 21

def command_line_opts
  options.inject([]) do |acc,(k,v)|
    acc << "-#{k} #{v}" unless [:command, :grep].include?(k)
    acc
  end.join(" ")
end

#command_output ⇒ Object 



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# File 'lib/city_watch/util/run_command.rb', line 3

def command_output
  unless !supported?
    puts "Running `#{command_line}`..." if CityWatch.debug?
    `#{command_line}`
  else
    puts "Command not present: #{options[:command]} (Skipping)" if CityWatch.debug?
    ""
  end
end

#data ⇒ Object 



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# File 'lib/city_watch/util/run_command.rb', line 37

def data
  headers = false
  output = []
  command_output.split("\n").map {|line| v = line.split("\s"); v.shift; v }.each do |line|
    if !headers
      headers = line.map {|hdr| hdr.downcase.to_sym}
      next
    end
    next unless headers
    pkt = {}
    line.each_with_index do |itm,idx|
      pkt[headers[idx]] = itm
    end
    output << pkt
  end
  output
end

#options ⇒ Object 



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# File 'lib/city_watch/util/run_command.rb', line 28

def options
  @opts ||= self.class.options
end

#set_opts(opts = {}) ⇒ Object 



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# File 'lib/city_watch/util/run_command.rb', line 32

def set_opts(opts={})
  @opts = self.class.options.merge(opts)
  @command = nil
end

#supported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/city_watch/util/run_command.rb', line 13

def supported?
  `which #{options[:command]}` != ""
end