Class: Vagrant::Box

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/vagrant/box.rb

Overview

Represents a "box," which is a package Vagrant environment that is used as a base image when creating a new guest machine.

Constant Summary collapse

REQUIRED_METADATA_FIELDS =

The required fields in a boxes metadata.json file

["provider"]
BOX_UPDATE_CHECK_INTERVAL =

Number of seconds to wait between checks for box updates

3600

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, provider, version, directory, architecture: nil, metadata_url: nil, hook: nil) ⇒ Box

This is used to initialize a box.

Parameters:

  • name (String) —

    Logical name of the box.

  • provider (Symbol) —

    The provider that this box implements.

  • directory (Pathname) —

    The directory where this box exists on disk.

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

    Architecture the box was built for

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

    Metadata URL for box

  • hook (Hook) (defaults to: nil) —

    A hook to apply to the box downloader, for example, for authentication

Raises:



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# File 'lib/vagrant/box.rb', line 74

def initialize(name, provider, version, directory, architecture: nil, metadata_url: nil, hook: nil)
  @name      = name
  @version   = version
  @provider  = provider
  @directory = directory
  @architecture = architecture
  @metadata_url = metadata_url
  @hook = hook

  metadata_file = directory.join("metadata.json")
  raise Errors::BoxMetadataFileNotFound, name: @name if !metadata_file.file?

  begin
    @metadata = JSON.parse(directory.join("metadata.json").read)
    validate_metadata_json(@metadata)
  rescue JSON::ParserError
    raise Errors::BoxMetadataCorrupted, name: @name
  end

  @logger = Log4r::Logger.new("vagrant::box")
end

Instance Attribute Details

#architecture ⇒ String (readonly)

This is the architecture that this box is build for.

Returns:

  • (String) 


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# File 'lib/vagrant/box.rb', line 41

def architecture
  @architecture
end

#directory ⇒ Pathname (readonly)

This is the directory on disk where this box exists.

Returns:

  • (Pathname) 


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# File 'lib/vagrant/box.rb', line 51

def directory
  @directory
end

#metadata ⇒ Hash (readonly)

This is the metadata for the box. This is read from the "metadata.json" file that all boxes require.

Returns:

  • (Hash) 


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# File 'lib/vagrant/box.rb', line 57

def metadata
  @metadata
end

#metadata_url ⇒ String (readonly)

This is the URL to the version info and other metadata for this box.

Returns:

  • (String) 


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# File 'lib/vagrant/box.rb', line 63

def metadata_url
  @metadata_url
end

#name ⇒ String (readonly)

The box name. This is the logical name used when adding the box.

Returns:

  • (String) 


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# File 'lib/vagrant/box.rb', line 31

def name
  @name
end

#provider ⇒ Symbol (readonly)

This is the provider that this box is built for.

Returns:

  • (Symbol) 


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# File 'lib/vagrant/box.rb', line 36

def provider
  @provider
end

#version ⇒ String (readonly)

The version of this box.

Returns:

  • (String) 


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# File 'lib/vagrant/box.rb', line 46

def version
  @version
end

Instance Method Details

#<=>(other) ⇒ Object

Implemented for comparison with other boxes. Comparison is implemented by comparing names, providers, and architectures.



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# File 'lib/vagrant/box.rb', line 252

def <=>(other)
  return super if !other.is_a?(self.class)

  # Comparison is done by composing the name and provider
  "#{@name}-#{@version}-#{@provider}-#{@architecture}" <=>
  "#{other.name}-#{other.version}-#{other.provider}-#{other.architecture}"
end

#automatic_update_check_allowed? ⇒ Boolean

Check if a box update check is allowed. Uses a file in the box data directory to track when the last auto update check was performed and returns true if the BOX_UPDATE_CHECK_INTERVAL has passed.

Returns:

  • (Boolean) 


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# File 'lib/vagrant/box.rb', line 216

def automatic_update_check_allowed?
  check_path = directory.join("box_update_check")
  if check_path.exist?
    last_check_span = Time.now.to_i - check_path.mtime.to_i
    if last_check_span < BOX_UPDATE_CHECK_INTERVAL
      @logger.info("box update check is under the interval threshold")
      return false
    end
  end
  FileUtils.touch(check_path)
  true
end

#destroy! ⇒ Object

This deletes the box. This is NOT undoable.



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# File 'lib/vagrant/box.rb', line 109

def destroy!
  # Delete the directory to delete the box.
  FileUtils.rm_r(@directory)

  # Just return true always
  true
rescue Errno::ENOENT
  # This means the directory didn't exist. Not a problem.
  return true
end

#has_update?(version = nil, download_options: {}) ⇒ Array

Checks if the box has an update and returns the metadata, version, and provider. If the box doesn't have an update that satisfies the constraints, it will return nil.

This will potentially make a network call if it has to load the metadata from the network.

Parameters:

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

    Version constraints the update must satisfy. If nil, the version constrain defaults to being a larger version than this box.

Returns:

  • (Array) 


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# File 'lib/vagrant/box.rb', line 189

def has_update?(version=nil, download_options: {})
  if !@metadata_url
    raise Errors::BoxUpdateNoMetadata, name: @name
  end

  if download_options.delete(:automatic_check) && !automatic_update_check_allowed?
    @logger.info("Skipping box update check")
    return
  end

  version += ", " if version
  version ||= ""
  version += "> #{@version}"
  md      = self.load_metadata(download_options)
  newer   = md.version(version, provider: @provider, architecture: @architecture)
  
  return nil if newer == nil || !md.compatible_version_update?(@version, newer.version, provider: @provider, architecture: @architecture)

  [md, newer, newer.provider(@provider, @architecture)]
end

#in_use?(index) ⇒ Array<MachineIndex::Entry>

Checks if this box is in use according to the given machine index and returns the entries that appear to be using the box.

The entries returned, if any, are not tested for validity with MachineIndex::Entry#valid?, so the caller should do that if the caller cares.

Parameters:

Returns:



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# File 'lib/vagrant/box.rb', line 129

def in_use?(index)
  results = []
  index.each do |entry|
    box_data = entry.extra_data["box"]
    next if !box_data

    # If all the data matches, record it
    if box_data["name"] == self.name &&
      box_data["provider"] == self.provider.to_s &&
      box_data["architecture"] == self.architecture &&
      box_data["version"] == self.version.to_s
      results << entry
    end
  end

  return nil if results.empty?
  results
end

#load_metadata(download_options = {}) ⇒ BoxMetadata

Loads the metadata URL and returns the latest metadata associated with this box.

Parameters:

  • download_options (Hash) (defaults to: {}) —

    Options to pass to the downloader.

Returns:



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# File 'lib/vagrant/box.rb', line 153

def load_metadata(download_options={})
  tf = Tempfile.new("vagrant-load-metadata")
  tf.close

  url = @metadata_url
  if File.file?(url) || url !~ /^[a-z0-9]+:.*$/i
    url = File.expand_path(url)
    url = Util::Platform.cygwin_windows_path(url)
    url = "file:#{url}"
  end

  opts = { headers: ["Accept: application/json"] }.merge(download_options)
  d = Util::Downloader.new(url, tf.path, opts)
  if @hook
    @hook.call(:authenticate_box_downloader, downloader: d)
  end
  d.download!
  BoxMetadata.new(File.open(tf.path, "r"), url: url)
rescue Errors::DownloaderError => e
  raise Errors::BoxMetadataDownloadError,
    message: e.extra_data[:message]
ensure
  tf.unlink if tf
end

#repackage(path) ⇒ Boolean

This repackages this box and outputs it to the given path.

Parameters:

  • path (Pathname) —

    The full path (filename included) of where to output this box.

Returns:

  • (Boolean) —

    true if this succeeds.



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# File 'lib/vagrant/box.rb', line 234

def repackage(path)
  @logger.debug("Repackaging box '#{@name}' to: #{path}")

  Util::SafeChdir.safe_chdir(@directory) do
    # Find all the files in our current directory and tar it up!
    files = Dir.glob(File.join(".", "**", "*")).select { |f| File.file?(f) }

    # Package!
    Util::Subprocess.execute("bsdtar", "-czf", path.to_s, *files)
  end

  @logger.info("Repackaged box '#{@name}' successfully: #{path}")

  true
end

#validate_metadata_json(metadata) ⇒ Object 



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# File 'lib/vagrant/box.rb', line 96

def validate_metadata_json(metadata)
  metatdata_fields = metadata.keys
  REQUIRED_METADATA_FIELDS.each do |field|
    if !metatdata_fields.include?(field)
      raise Errors::BoxMetadataMissingRequiredFields,
        name: @name,
        required_field: field,
        all_fields: REQUIRED_METADATA_FIELDS.join(", ")
    end
  end
end