Class: Chake::Backend

Inherits:
Struct
  • Object
show all
Defined in:
lib/chake/backend.rb,
lib/chake/backend/ssh.rb,
lib/chake/backend/local.rb

Direct Known Subclasses

Local, Ssh

Defined Under Namespace

Classes: CommandFailed, Local, Ssh

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#node ⇒ Object

Returns the value of attribute node

Returns:

  • (Object) —

    the current value of node



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# File 'lib/chake/backend.rb', line 3

def node
  @node
end

Class Method Details

.backend_name ⇒ Object 



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# File 'lib/chake/backend.rb', line 59

def self.backend_name
  name.split("::").last.downcase
end

.get(name) ⇒ Object 



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# File 'lib/chake/backend.rb', line 68

def self.get(name)
  backend = @backends.find { |b| b.backend_name == name }
  backend || raise(ArgumentError.new("Invalid backend name: #{name}"))
end

.inherited(subclass) ⇒ Object 



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# File 'lib/chake/backend.rb', line 63

def self.inherited(subclass)
  @backends ||= []
  @backends << subclass
end

Instance Method Details

#rsync ⇒ Object 



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# File 'lib/chake/backend.rb', line 16

def rsync
  ['rsync']
end

#rsync_dest ⇒ Object 



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# File 'lib/chake/backend.rb', line 20

def rsync_dest
  node.path + '/'
end

#run(cmd) ⇒ Object 



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# File 'lib/chake/backend.rb', line 24

def run(cmd)
  printf "%#{Node.max_node_name_length}s: $ %s\n", node.hostname, cmd
  output = IO.popen(command_runner + [cmd])
  output.each_line do |line|
    printf "%#{Node.max_node_name_length}s: %s\n", node.hostname, line.strip
  end
  output.close
  if $?
    status = $?.exitstatus
    if status != 0
      raise CommandFailed.new([node.hostname, 'FAILED with exit status %d' % status].join(': '))
    end
  end
end

#run_as_root(cmd) ⇒ Object 



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# File 'lib/chake/backend.rb', line 43

def run_as_root(cmd)
  if node.remote_username == 'root'
    run(cmd)
  else
    run('sudo ' + cmd)
  end
end

#run_shell ⇒ Object 



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# File 'lib/chake/backend.rb', line 39

def run_shell
  system(*shell_command)
end

#scp ⇒ Object 



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# File 'lib/chake/backend.rb', line 8

def scp
  ['scp']
end

#scp_dest ⇒ Object 



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# File 'lib/chake/backend.rb', line 12

def scp_dest
  ''
end

#skip? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chake/backend.rb', line 55

def skip?
  false
end

#to_s ⇒ Object 



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# File 'lib/chake/backend.rb', line 51

def to_s
  self.class.backend_name
end