Class: Ufo::Docker::Dockerfile

Inherits:
Object
  • Object
show all
Includes:
Utils::Logging
Defined in:
lib/ufo/docker/dockerfile.rb

Instance Method Summary collapse

Methods included from Utils::Logging

#logger

Constructor Details

#initialize(docker_image, options = {}) ⇒ Dockerfile

Returns a new instance of Dockerfile.



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# File 'lib/ufo/docker/dockerfile.rb', line 5

def initialize(docker_image, options={})
  @docker_image, @options = docker_image, options
end

Instance Method Details

#current_dockerfile ⇒ Object 



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# File 'lib/ufo/docker/dockerfile.rb', line 13

def current_dockerfile
  @current_dockerfile ||= IO.read(dockerfile_path)
end

#dockerfile_path ⇒ Object 



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# File 'lib/ufo/docker/dockerfile.rb', line 17

def dockerfile_path
  "#{Ufo.root}/Dockerfile"
end

#new_dockerfile ⇒ Object 



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# File 'lib/ufo/docker/dockerfile.rb', line 21

def new_dockerfile
  lines = current_dockerfile.split("\n")
  # replace FROM line
  new_lines = lines.map do |line|
                if line =~ /^FROM /
                  "FROM #{@docker_image}"
                else
                  line
                end
              end
  new_lines.join("\n") + "\n"
end

#update ⇒ Object 



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# File 'lib/ufo/docker/dockerfile.rb', line 9

def update
  write_new_dockerfile
end

#write_new_dockerfile ⇒ Object 



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# File 'lib/ufo/docker/dockerfile.rb', line 34

def write_new_dockerfile
  IO.write(dockerfile_path, new_dockerfile)
  logger.debug <<~EOL
    The Dockerfile FROM statement has been updated with the latest base image:

        #{@docker_image}

  EOL
end