Class: Boxes::Builder

Inherits:
Object
  • Object
show all
Includes:
Errors
Defined in:
lib/boxes/builder.rb

Overview

Class which drives the build process.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(env, args) ⇒ Builder

Initialise a new build.

Parameters:

  • env (Boxes::Environment) —

    environment to operate in.

  • args (Hash)
  • template (String) —

    the name of the template.

  • scripts (Array) —

    scripts to include in the build.



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# File 'lib/boxes/builder.rb', line 14

def initialize(env, args) # rubocop:disable Metrics/MethodLength
  @name = args[:name] || fail(MissingArgumentError,
                              'The name must be specified.')
  @provider = args[:provider] || fail(MissingArgumentError,
                                      'The provider must be specified.')
  template = args[:template] || fail(MissingArgumentError,
                                     'The template must be specified.')
  scripts = args.fetch(:scripts, [])

  @template = Template.new(env, template)
  @scripts = scripts.collect do |c|
    env.available_scripts.include?(c) ? c : fail(ScriptNotFoundError)
  end
end

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/boxes/builder.rb', line 6

def name
  @name
end

#provider ⇒ Object

Returns the value of attribute provider.



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# File 'lib/boxes/builder.rb', line 6

def provider
  @provider
end

#scripts ⇒ Object

Returns the value of attribute scripts.



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# File 'lib/boxes/builder.rb', line 6

def scripts
  @scripts
end

#template ⇒ Object

Returns the value of attribute template.



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# File 'lib/boxes/builder.rb', line 6

def template
  @template
end

Instance Method Details

#clean ⇒ Object

Clean any temporary files used during building.



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# File 'lib/boxes/builder.rb', line 74

def clean
  FileUtils.rm("#{build_name}.json")
end

#run ⇒ Object

Run the build.



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# File 'lib/boxes/builder.rb', line 30

def run # rubocop:disable Metrics/AbcSize, Metrics/MethodLength
  original_directory = FileUtils.pwd
  box_name = ''

  # render the template
  rendered_template = template.render(name: name,
                                      provider: provider,
                                      scripts: scripts)

  # write the template to a file
  File.open(Boxes.config.working_dir + "#{build_name}.json", 'w') do |f|
    f.puts rendered_template
  end

  # set the environment vars
  Boxes.config.environment_vars.each do |e|
    e.each do |k, v|
      ENV[k] = v.to_s
    end
  end

  # execute the packer command
  FileUtils.chdir(Boxes.config.working_dir)
  cmd = "packer build #{build_name}.json"
  status = Subprocess.run(cmd) do |stdout, stderr, _thread|
    puts stdout unless stdout.nil?
    puts stderr unless stderr.nil?

    # catch the name of the artifact
    if stdout =~ /\.box/
      box_name = stdout.gsub(/[a-zA-Z0-9:\-_]*?\.box/).first
    end
  end

  if status.exitstatus == 0
    FileUtils.mv(Boxes.config.working_dir + box_name,
                 "#{original_directory}/#{name}.box")
  else
    fail BuildRunError,
         'The build didn\'t complete successfully. Check the logs.'
  end
end