Class: Cutlass::PackBuild

Inherits:
Object
  • Object
show all
Defined in:
lib/cutlass/pack_build.rb

Overview

Build an image with ‘pack` and cloud native buildpacks

begin
  build = PackBuild.new(app_dir: dir, buildpacks: ["heroku/ruby"], builder: "heroku/buildpacks:18")
  build.call

  build.stdout # => "...Successfully built image"
  build.success? # => true
ensure
  build.teardown
end

Instance Method Summary collapse

Constructor Details

#initialize(app_dir:, config: {}, builder: nil, buildpacks: [], image_name: Cutlass.default_image_name, exception_on_failure: true) ⇒ PackBuild

Returns a new instance of PackBuild.



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# File 'lib/cutlass/pack_build.rb', line 23

def initialize(
  app_dir:,
  config: {},
  builder: nil,
  buildpacks: [],
  image_name: Cutlass.default_image_name,
  exception_on_failure: true
)
  @app_dir = app_dir
  @builder = builder
  @image_name = image_name
  @env_arguments = config.map { |key, value| "--env #{key}=#{value}" }.join(" ")
  @exception_on_failure = exception_on_failure
  @image = nil
  @result = nil

  @buildpacks = Array(buildpacks).map do |buildpack|
    if buildpack.respond_to?(:name)
      buildpack.name
    else
      buildpack
    end
  end
end

Instance Method Details

#builder_arg ⇒ Object 



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# File 'lib/cutlass/pack_build.rb', line 110

def builder_arg
  "-B #{builder}" if builder
end

#call ⇒ Object 



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# File 'lib/cutlass/pack_build.rb', line 71

def call
  puts pack_command if Cutlass.debug?
  call_pack

  puts @result.stdout if Cutlass.debug?
  puts @result.stderr if Cutlass.debug?
  self
end

#failed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cutlass/pack_build.rb', line 80

def failed?
  !success?
end

#image_id ⇒ Object 



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# File 'lib/cutlass/pack_build.rb', line 48

def image_id
  raise "No image ID, container was not successfully built, #{error_message}" if @image.nil?
  @image.id
end

#pack_command ⇒ Object 



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# File 'lib/cutlass/pack_build.rb', line 114

def pack_command
  "pack build #{image_name} --path #{app_dir} #{builder_arg} --buildpack #{buildpacks.join(",")} #{env_arguments} #{"-v" if Cutlass.debug?}"
end

#result ⇒ Object 



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# File 'lib/cutlass/pack_build.rb', line 53

def result
  raise "Must execute method `call` first" unless @result

  @result
end

#stderr ⇒ Object 



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# File 'lib/cutlass/pack_build.rb', line 67

def stderr
  result.stderr
end

#stdout ⇒ Object 



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# File 'lib/cutlass/pack_build.rb', line 63

def stdout
  result.stdout
end

#success? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cutlass/pack_build.rb', line 84

def success?
  result.success?
end

#teardown ⇒ Object 



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# File 'lib/cutlass/pack_build.rb', line 59

def teardown
  @image&.remove(force: true)
end