Class: OsCtl::Image::Operations::Builder::ControlledRunscript

Inherits:
OsCtl::Image::Operations::Base show all
Includes:
Lib::Utils::Log, Lib::Utils::System
Defined in:
lib/osctl/image/operations/builder/controlled_runscript.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from OsCtl::Image::Operations::Base

run

Constructor Details

#initialize(builder, file: nil, script: nil, id: nil, name: nil, client: nil) ⇒ ControlledRunscript

Returns a new instance of ControlledRunscript.

Parameters:

  • builder (Builder)
  • file (String) (defaults to: nil) —

    script to execute

  • script (String) (defaults to: nil) —

    shell commands to execute

  • id (nil, String) (defaults to: nil) —

    optional run identifier

  • name (nil, String) (defaults to: nil)
  • client (nil, OsCtldClient) (defaults to: nil) 


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# File 'lib/osctl/image/operations/builder/controlled_runscript.rb', line 25

def initialize(builder, file: nil, script: nil, id: nil, name: nil, client: nil)
  if (file && script ) || (!file && !script)
    raise ArgumentError, 'provide file or script'
  end

  @builder = builder
  @file = file
  @script = script
  @id = id
  @name = name || '.osctl-image-runscript'
  @client = client || OsCtldClient.new
end

Instance Attribute Details

#builder ⇒ Builder (readonly)

Returns:



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# File 'lib/osctl/image/operations/builder/controlled_runscript.rb', line 11

def builder
  @builder
end

#client ⇒ Object (readonly, protected)

Returns the value of attribute client.



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# File 'lib/osctl/image/operations/builder/controlled_runscript.rb', line 61

def client
  @client
end

#file ⇒ String (readonly)

Returns:

  • (String) 


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# File 'lib/osctl/image/operations/builder/controlled_runscript.rb', line 14

def file
  @file
end

#id ⇒ Object (readonly, protected)

Returns the value of attribute id.



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# File 'lib/osctl/image/operations/builder/controlled_runscript.rb', line 61

def id
  @id
end

#name ⇒ Object (readonly, protected)

Returns the value of attribute name.



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# File 'lib/osctl/image/operations/builder/controlled_runscript.rb', line 61

def name
  @name
end

#script ⇒ String (readonly)

Returns:

  • (String) 


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# File 'lib/osctl/image/operations/builder/controlled_runscript.rb', line 17

def script
  @script
end

Instance Method Details

#create_file ⇒ File, String (protected)

Returns file, path relative from builder's rootfs.

Returns:

  • (File, String) —

    file, path relative from builder's rootfs



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# File 'lib/osctl/image/operations/builder/controlled_runscript.rb', line 64

def create_file
  host_path = nil
  builder_path = nil

  5.times do
    builder_path = File.join('/', "#{name}#{SecureRandom.hex(5)}")
    host_path = File.join(builder.attrs[:rootfs], builder_path)

    if File.exist?(host_path)
      host_path = nil
    else
      break
    end
  end

  if host_path.nil?
    fail 'unable to create temporary file'
  end

  fh = File.open(host_path, 'w')
  File.chmod(0755, host_path)
  [fh, builder_path]
end

#execute ⇒ Integer

Returns exit status.

Returns:

  • (Integer) —

    exit status



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# File 'lib/osctl/image/operations/builder/controlled_runscript.rb', line 39

def execute
  fh, path = create_file


  if file
    File.open(file, 'r') { |f| IO.copy_stream(f, fh) }
  elsif script
    fh.write(script)
  else
    fail 'programming error'
  end

  fh.close

  begin
    Operations::Builder::ControlledExec.run(builder, [path], id: id, client: client)
  ensure
    unlink(fh.path)
  end
end

#unlink(path) ⇒ Object (protected) 



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# File 'lib/osctl/image/operations/builder/controlled_runscript.rb', line 88

def unlink(path)
  File.unlink(path)
rescue Errno::ENOENT
end