Class: EY::Serverside::Adapter::Command

Inherits:
Object
  • Object
show all
Defined in:
lib/engineyard-serverside-adapter/command.rb

Instance Method Summary collapse

Constructor Details

#initialize(binary_path, version, *task) {|_self| ... } ⇒ Command

Returns a new instance of Command.

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/engineyard-serverside-adapter/command.rb', line 8

def initialize(binary_path, version, *task)
  @binary    = binary_path.to_s
  @version   = version
  @task      = task
  @arguments = []

  yield self if block_given?
end

Instance Method Details

#array_argument(switch, values) ⇒ Object 



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# File 'lib/engineyard-serverside-adapter/command.rb', line 25

def array_argument(switch, values)
  compacted = values.compact.sort
  if compacted.any?
    @arguments << [switch, compacted]
  end
end

#boolean_argument(switch, value) ⇒ Object 



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# File 'lib/engineyard-serverside-adapter/command.rb', line 32

def boolean_argument(switch, value)
  if value
    @arguments << [switch]
  end
end

#hash_argument(switch, pairs) ⇒ Object 



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# File 'lib/engineyard-serverside-adapter/command.rb', line 38

def hash_argument(switch, pairs)
  if pairs.any? {|k,v| !v.nil?}
    @arguments << [switch, pairs.reject { |k,v| v.nil? }.map { |pair| pair.join(':') }.sort]
  end
end

#instances_argument(_, instances) ⇒ Object 



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# File 'lib/engineyard-serverside-adapter/command.rb', line 44

def instances_argument(_, instances)
  role_pairs = instances.inject({}) do |roles, instance|
    roles.merge(instance[:hostname] => instance[:roles].join(','))
  end
  hash_argument('--instance-roles', role_pairs)

  role_pairs = instances.inject({}) do |roles, instance|
    roles.merge(instance[:hostname] => instance[:name])
  end
  hash_argument('--instance-names', role_pairs)

  array_argument('--instances', instances.map{|i| i[:hostname]})
end

#json_argument(switch, value) ⇒ Object 



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# File 'lib/engineyard-serverside-adapter/command.rb', line 58

def json_argument(switch, value)
  if value
    string_argument(switch, MultiJson.dump(value))
  end
end

#string_argument(switch, value) ⇒ Object 



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# File 'lib/engineyard-serverside-adapter/command.rb', line 64

def string_argument(switch, value)
  if !value
    @arguments << [switch.sub(/^--/,'--no-')] # specifically for no-migrate
  elsif !value.to_s.empty?
    @arguments << [switch, value]
  end
end

#to_argv ⇒ Object 



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# File 'lib/engineyard-serverside-adapter/command.rb', line 17

def to_argv
  [@binary, "_#{@version}_"] + @task + @arguments.sort_by { |x| x.first }.flatten
end

#to_s ⇒ Object 



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# File 'lib/engineyard-serverside-adapter/command.rb', line 21

def to_s
  Escape.shell_command to_argv
end