Class: Chef::CookbookVersion

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/chef/cookbook_version.rb

Overview

Chef::CookbookVersion

CookbookVersion is a model object encapsulating the data about a Chef cookbook. Chef supports maintaining multiple versions of a cookbook on a single server; each version is represented by a distinct instance of this class. – TODO: timh/cw: 5-24-2010: mutators for files (e.g., recipe_filenames=, recipe_filenames.insert) should dirty the manifest so it gets regenerated.

Constant Summary collapse

COOKBOOK_SEGMENTS =
[ :resources, :providers, :recipes, :definitions, :libraries, :attributes, :files, :templates, :root_files ]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ CookbookVersion

Creates a new Chef::CookbookVersion object.

Returns

object<Chef::CookbookVersion>

Duh. :)



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# File 'lib/chef/cookbook_version.rb', line 195

def initialize(name)
  @name = name
  @frozen = false
  @attribute_filenames = Array.new
  @definition_filenames = Array.new
  @template_filenames = Array.new
  @file_filenames = Array.new
  @recipe_filenames = Array.new
  @recipe_filenames_by_name = Hash.new
  @library_filenames = Array.new
  @resource_filenames = Array.new
  @provider_filenames = Array.new
  @metadata_filenames = Array.new
  @root_dir = nil
  @root_filenames = Array.new
  @status = :ready
  @manifest = nil
  @file_vendor = nil
  @metadata = Chef::Cookbook::Metadata.new
end

Instance Attribute Details

#attribute_filenamesObject Also known as: attribute_files

attribute_filenames also has a setter that has non-default functionality.



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# File 'lib/chef/cookbook_version.rb', line 60

def attribute_filenames
  @attribute_filenames
end

#attribute_filenames_by_short_filenameObject (readonly)

Returns the value of attribute attribute_filenames_by_short_filename.



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# File 'lib/chef/cookbook_version.rb', line 67

def attribute_filenames_by_short_filename
  @attribute_filenames_by_short_filename
end

#definition_filenamesObject

Returns the value of attribute definition_filenames.



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# File 'lib/chef/cookbook_version.rb', line 46

def definition_filenames
  @definition_filenames
end

#file_filenamesObject

Returns the value of attribute file_filenames.



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# File 'lib/chef/cookbook_version.rb', line 48

def file_filenames
  @file_filenames
end

#library_filenamesObject

Returns the value of attribute library_filenames.



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# File 'lib/chef/cookbook_version.rb', line 49

def library_filenames
  @library_filenames
end

#metadataObject

Returns the value of attribute metadata.



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# File 'lib/chef/cookbook_version.rb', line 54

def 
  @metadata
end

#metadata_filenamesObject

Returns the value of attribute metadata_filenames.



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# File 'lib/chef/cookbook_version.rb', line 55

def 
  @metadata_filenames
end

#nameObject

Returns the value of attribute name.



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# File 'lib/chef/cookbook_version.rb', line 53

def name
  @name
end

#provider_filenamesObject

Returns the value of attribute provider_filenames.



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# File 'lib/chef/cookbook_version.rb', line 51

def provider_filenames
  @provider_filenames
end

#recipe_filenamesObject Also known as: recipe_files

recipe_filenames also has a setter that has non-default functionality.



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# File 'lib/chef/cookbook_version.rb', line 64

def recipe_filenames
  @recipe_filenames
end

#recipe_filenames_by_nameObject (readonly)

Returns the value of attribute recipe_filenames_by_name.



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# File 'lib/chef/cookbook_version.rb', line 66

def recipe_filenames_by_name
  @recipe_filenames_by_name
end

#resource_filenamesObject

Returns the value of attribute resource_filenames.



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# File 'lib/chef/cookbook_version.rb', line 50

def resource_filenames
  @resource_filenames
end

#root_dirObject

Returns the value of attribute root_dir.



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# File 'lib/chef/cookbook_version.rb', line 45

def root_dir
  @root_dir
end

#root_filenamesObject

Returns the value of attribute root_filenames.



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# File 'lib/chef/cookbook_version.rb', line 52

def root_filenames
  @root_filenames
end

#statusObject

Returns the value of attribute status.



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# File 'lib/chef/cookbook_version.rb', line 56

def status
  @status
end

#template_filenamesObject

Returns the value of attribute template_filenames.



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# File 'lib/chef/cookbook_version.rb', line 47

def template_filenames
  @template_filenames
end

Class Method Details

.available_versions(cookbook_name) ⇒ Object

Given a cookbook_name, get a list of all versions that exist on the server.

Returns

[String]

Array of cookbook versions, which are strings like ‘x.y.z’

nil

if the cookbook doesn’t exist. an error will also be logged.



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# File 'lib/chef/cookbook_version.rb', line 651

def self.available_versions(cookbook_name)
  chef_server_rest.get_rest("cookbooks/#{cookbook_name}")[cookbook_name]["versions"].map do |cb|
    cb["version"]
  end
rescue Net::HTTPServerException => e
  if e.to_s =~ /^404/
    Chef::Log.error("Cannot find a cookbook named #{cookbook_name}")
    nil
  else
    raise
  end
end

.cacheObject



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# File 'lib/chef/cookbook_version.rb', line 78

def self.cache
  Chef::FileCache
end

.checksum_cookbook_file(filepath) ⇒ Object

This is the one and only method that knows how cookbook files’ checksums are generated.



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# File 'lib/chef/cookbook_version.rb', line 71

def self.checksum_cookbook_file(filepath)
  Chef::Digester.generate_md5_checksum_for_file(filepath)
rescue Errno::ENOENT
  Chef::Log.debug("File #{filepath} does not exist, so there is no checksum to generate")
  nil
end

.chef_server_restObject

REST API



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# File 'lib/chef/cookbook_version.rb', line 604

def self.chef_server_rest
  Chef::REST.new(Chef::Config[:chef_server_url])
end

.cleanup_file_cacheObject



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# File 'lib/chef/cookbook_version.rb', line 178

def self.cleanup_file_cache
  unless Chef::Config[:solo]
    # Delete each file in the cache that we didn't encounter in the
    # manifest.
    cache.find(File.join(%w{cookbooks ** *})).each do |cache_filename|
      unless valid_cache_entries[cache_filename]
        Chef::Log.info("Removing #{cache_filename} from the cache; it is no longer needed by chef-client.")
        cache.delete(cache_filename)
      end
    end
  end
end

.clear_obsoleted_cookbooks(cookbook_hash) ⇒ Object

Iterates over cached cookbooks’ files, removing files belonging to cookbooks that don’t appear in cookbook_hash



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# File 'lib/chef/cookbook_version.rb', line 103

def self.clear_obsoleted_cookbooks(cookbook_hash)
  # Remove all cookbooks no longer relevant to this node
  cache.find(File.join(%w{cookbooks ** *})).each do |cache_file|
    cache_file =~ /^cookbooks\/([^\/]+)\//
    unless cookbook_hash.has_key?($1)
      Chef::Log.info("Removing #{cache_file} from the cache; its cookbook is no longer needed on this client.")
      cache.delete(cache_file)
    end
  end
end

.json_create(o) ⇒ Object



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# File 'lib/chef/cookbook_version.rb', line 561

def self.json_create(o)
  cookbook_version = new(o["cookbook_name"])
  # We want the Chef::Cookbook::Metadata object to always be inflated
  cookbook_version. = Chef::Cookbook::Metadata.from_hash(o["metadata"])
  cookbook_version.manifest = o

  # We don't need the following step when we decide to stop supporting deprecated operators in the metadata (e.g. <<, >>)
  cookbook_version.manifest["metadata"] = Chef::JSONCompat.from_json(cookbook_version..to_json)

  cookbook_version.freeze_version if o["frozen?"]
  cookbook_version
end

.latest_cookbooksObject

Get the newest version of all cookbooks



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# File 'lib/chef/cookbook_version.rb', line 665

def self.latest_cookbooks
  chef_server_rest.get_rest('cookbooks/_latest')
end

.listObject

The API returns only a single version of each cookbook in the result from the cookbooks method



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# File 'lib/chef/cookbook_version.rb', line 637

def self.list
  chef_server_rest.get_rest('cookbooks')
end

.list_all_versionsObject



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# File 'lib/chef/cookbook_version.rb', line 641

def self.list_all_versions
  chef_server_rest.get_rest('cookbooks?num_versions=all')
end

.load(name, version = "_latest") ⇒ Object



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# File 'lib/chef/cookbook_version.rb', line 631

def self.load(name, version="_latest")
  version = "_latest" if version == "latest"
  chef_server_rest.get_rest("cookbooks/#{name}/#{version}")
end

.sync_cookbook_file_cache(cookbook) ⇒ Object

Update the file caches for a given cache segment. Takes a segment name and a hash that matches one of the cookbooks/_attribute_files style remote file listings.

Parameters

cookbook<Chef::Cookbook>

The cookbook to update

valid_cache_entries<Hash>

Out-param; Added to this hash are the files that

were referred to by this cookbook



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# File 'lib/chef/cookbook_version.rb', line 122

def self.sync_cookbook_file_cache(cookbook)
  Chef::Log.debug("Synchronizing cookbook #{cookbook.name}")

  # files and templates are lazily loaded, and will be done later.
  eager_segments = COOKBOOK_SEGMENTS.dup

  unless Chef::Config[:no_lazy_load] then
    eager_segments.delete(:files)
    eager_segments.delete(:templates)
  end

  eager_segments.each do |segment|
    segment_filenames = Array.new
    cookbook.manifest[segment].each do |manifest_record|
      # segment = cookbook segment
      # remote_list = list of file hashes
      #
      # We need the list of known good attribute files, so we can delete any that are
      # just laying about.

      cache_filename = File.join("cookbooks", cookbook.name, manifest_record['path'])
      valid_cache_entries[cache_filename] = true

      current_checksum = nil
      if cache.has_key?(cache_filename)
        current_checksum = checksum_cookbook_file(cache.load(cache_filename, false))
      end

      # If the checksums are different between on-disk (current) and on-server
      # (remote, per manifest), do the update. This will also execute if there
      # is no current checksum.
      if current_checksum != manifest_record['checksum']
        raw_file = chef_server_rest.get_rest(manifest_record[:url], true)

        Chef::Log.info("Storing updated #{cache_filename} in the cache.")
        cache.move_to(raw_file.path, cache_filename)
      else
        Chef::Log.debug("Not storing #{cache_filename}, as the cache is up to date.")
      end

      # make the segment filenames a full path.
      full_path_cache_filename = cache.load(cache_filename, false)
      segment_filenames << full_path_cache_filename
    end

    # replace segment filenames with a full-path one.
    if segment.to_sym == :recipes
      cookbook.recipe_filenames = segment_filenames
    elsif segment.to_sym == :attributes
      cookbook.attribute_filenames = segment_filenames
    else
      cookbook.segment_filenames(segment).replace(segment_filenames)
    end
  end
end

.sync_cookbooks(cookbook_hash) ⇒ Object

Synchronizes all the cookbooks from the chef-server.

Returns

true

Always returns true



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# File 'lib/chef/cookbook_version.rb', line 86

def self.sync_cookbooks(cookbook_hash)
  Chef::Log.info("Loading cookbooks [#{cookbook_hash.keys.sort.join(', ')}]")
  Chef::Log.debug("Cookbooks detail: #{cookbook_hash.inspect}")

  clear_obsoleted_cookbooks(cookbook_hash)

  # Synchronize each of the node's cookbooks, and add to the
  # valid_cache_entries hash.
  cookbook_hash.values.each do |cookbook|
    sync_cookbook_file_cache(cookbook)
  end

  true
end

Instance Method Details

#<=>(o) ⇒ Object



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# File 'lib/chef/cookbook_version.rb', line 669

def <=>(o)
  raise Chef::Exceptions::CookbookVersionNameMismatch if self.name != o.name
  # FIXME: can we change the interface to the Metadata class such
  # that metadata.version returns a Chef::Version instance instead
  # of a string?
  Chef::Version.new(self.version) <=> Chef::Version.new(o.version)
end

#checksumsObject

Returns a hash of checksums to either nil or the on disk path (which is done by generate_manifest).



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# File 'lib/chef/cookbook_version.rb', line 287

def checksums
  unless @checksums
    generate_manifest
  end
  @checksums
end

#chef_server_restObject



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# File 'lib/chef/cookbook_version.rb', line 608

def chef_server_rest
  self.class.chef_server_rest
end

#destroyObject



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# File 'lib/chef/cookbook_version.rb', line 626

def destroy
  chef_server_rest.delete_rest("cookbooks/#{name}/#{version}")
  self
end

#force_save_urlObject

Adds the ‘force=true` parameter to the upload URL. This allows the user to overwrite a frozen cookbook (a PUT against the normal #save_url raises a 409 Conflict in this case).



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# File 'lib/chef/cookbook_version.rb', line 622

def force_save_url
  "cookbooks/#{name}/#{version}?force=true"
end

#freeze_versionObject



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# File 'lib/chef/cookbook_version.rb', line 227

def freeze_version
  @frozen = true
end

#frozen_version?Boolean

Indicates if this version is frozen or not. Freezing a coobkook version indicates that a new cookbook with the same name and version number shoule

Returns:

  • (Boolean)


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# File 'lib/chef/cookbook_version.rb', line 223

def frozen_version?
  @frozen
end

#full_nameObject



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# File 'lib/chef/cookbook_version.rb', line 299

def full_name
  "#{name}-#{version}"
end

#fully_qualified_recipe_namesObject

Return recipe names in the form of cookbook_name::recipe_name



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# File 'lib/chef/cookbook_version.rb', line 314

def fully_qualified_recipe_names
  results = Array.new
  recipe_filenames_by_name.each_key do |rname|
    results << "#{name}::#{rname}"
  end
  results
end

#generate_manifest_with_urls(&url_generator) ⇒ Object



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# File 'lib/chef/cookbook_version.rb', line 574

def generate_manifest_with_urls(&url_generator)
  rendered_manifest = manifest.dup
  COOKBOOK_SEGMENTS.each do |segment|
    if rendered_manifest.has_key?(segment)
      rendered_manifest[segment].each do |manifest_record|
        url_options = { :cookbook_name => name.to_s, :cookbook_version => version, :checksum => manifest_record["checksum"] }
        manifest_record["url"] = url_generator.call(url_options)
      end
    end
  end
  rendered_manifest
end

#load_recipe(recipe_name, run_context) ⇒ Object

called from DSL



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# File 'lib/chef/cookbook_version.rb', line 333

def load_recipe(recipe_name, run_context)
  unless recipe_filenames_by_name.has_key?(recipe_name)
    raise Chef::Exceptions::RecipeNotFound, "could not find recipe #{recipe_name} for cookbook #{name}"
  end

  Chef::Log.debug("Found recipe #{recipe_name} in cookbook #{name}")
  recipe = Chef::Recipe.new(name, recipe_name, run_context)
  recipe_filename = recipe_filenames_by_name[recipe_name]

  unless recipe_filename
    raise Chef::Exceptions::RecipeNotFound, "could not find #{recipe_name} files for cookbook #{name}"
  end

  recipe.from_file(recipe_filename)
  recipe
end

#manifestObject

A manifest is a Mash that maps segment names to arrays of manifest records (see #preferred_manifest_record for format of manifest records), as well as describing cookbook metadata. The manifest follows a form like the following:

{
  :cookbook_name = "apache2",
  :version = "1.0",
  :name = "Apache 2"
  :metadata = ???TODO: timh/cw: 5-24-2010: describe this format,

  :files => [
    {
      :name => "afile.rb",
      :path => "files/ubuntu-9.10/afile.rb",
      :checksum => "2222",
      :specificity => "ubuntu-9.10"
    },
  ],
  :templates => [ manifest_record1, ... ],
  ...
}


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# File 'lib/chef/cookbook_version.rb', line 258

def manifest
  unless @manifest
    generate_manifest
  end
  @manifest
end

#manifest=(new_manifest) ⇒ Object



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# File 'lib/chef/cookbook_version.rb', line 265

def manifest=(new_manifest)
  @manifest = Mash.new new_manifest
  @checksums = extract_checksums_from_manifest(@manifest)
  @manifest_records_by_path = extract_manifest_records_by_path(@manifest)

  COOKBOOK_SEGMENTS.each do |segment|
    next unless @manifest.has_key?(segment)
    filenames = @manifest[segment].map{|manifest_record| manifest_record['name']}

    if segment == :recipes
      self.recipe_filenames = filenames
    elsif segment == :attributes
      self.attribute_filenames = filenames
    else
      segment_filenames(segment).clear
      filenames.each { |filename| segment_filenames(segment) << filename }
    end
  end
end

#manifest_records_by_pathObject



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# File 'lib/chef/cookbook_version.rb', line 294

def manifest_records_by_path
  @manifest_records_by_path || generate_manifest
  @manifest_records_by_path
end

#metadata_json_fileObject



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# File 'lib/chef/cookbook_version.rb', line 587

def 
  File.join(root_dir, "metadata.json")
end

#metadata_rb_fileObject



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# File 'lib/chef/cookbook_version.rb', line 591

def 
  File.join(root_dir, "metadata.rb")
end

#preferred_filename_on_disk_location(node, segment, filename, current_filepath = nil) ⇒ Object



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# File 'lib/chef/cookbook_version.rb', line 422

def preferred_filename_on_disk_location(node, segment, filename, current_filepath=nil)
  manifest_record = preferred_manifest_record(node, segment, filename)
  if current_filepath && (manifest_record['checksum'] == self.class.checksum_cookbook_file(current_filepath))
    nil
  else
    file_vendor.get_filename(manifest_record['path'])
  end
end

#preferred_manifest_record(node, segment, filename) ⇒ Object

Determine the most specific manifest record for the given segment/filename, given information in the node. Throws FileNotFound if there is no such segment and filename in the manifest.

A manifest record is a Mash that follows the following form:

:name => "example.rb",
:path => "files/default/example.rb",
:specificity => "default",
:checksum => "1234"



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# File 'lib/chef/cookbook_version.rb', line 389

def preferred_manifest_record(node, segment, filename)
  preferences = preferences_for_path(node, segment, filename)

  # ensure that we generate the manifest, which will also generate
  # @manifest_records_by_path
  manifest

  # in order of prefernce, look for the filename in the manifest
  found_pref = preferences.find {|preferred_filename| @manifest_records_by_path[preferred_filename] }
  if found_pref
    @manifest_records_by_path[found_pref]
  else
    if segment == :files || segment == :templates
      error_message = "Cookbook '#{name}' (#{version}) does not contain a file at any of these locations:\n"
      error_locations = [
        "  #{segment}/#{node[:platform]}-#{node[:platform_version]}/#{filename}",
        "  #{segment}/#{node[:platform]}/#{filename}",
        "  #{segment}/default/#{filename}",
      ]
      error_message << error_locations.join("\n")
      existing_files = segment_filenames(segment)
      # Show the files that the cookbook does have. If the user made a typo,
      # hopefully they'll see it here.
      unless existing_files.empty?
        error_message << "\n\nThis cookbook _does_ contain: ['#{existing_files.join("','")}']"
      end
      raise Chef::Exceptions::FileNotFound, error_message
    else
      raise Chef::Exceptions::FileNotFound, "cookbook #{name} does not contain file #{segment}/#{filename}"
    end
  end
end

#preferred_manifest_records_for_directory(node, segment, dirname) ⇒ Object

Determine the manifest records from the most specific directory for the given node. See #preferred_manifest_record for a description of entries of the returned Array.



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# File 'lib/chef/cookbook_version.rb', line 472

def preferred_manifest_records_for_directory(node, segment, dirname)
  preferences = preferences_for_path(node, segment, dirname)
  records_by_pref = Hash.new
  preferences.each { |pref| records_by_pref[pref] = Array.new }

  manifest[segment].each do |manifest_record|
    manifest_record_path = manifest_record[:path]

    # extract the preference part from the path.
    if manifest_record_path =~ /(#{Regexp.escape(segment.to_s)}\/[^\/]+\/#{Regexp.escape(dirname)})\/.+$/
      # Note the specificy_dirname includes the segment and
      # dirname argument as above, which is what
      # preferences_for_path returns. It could be
      # "files/ubuntu-9.10/dirname", for example.
      specificity_dirname = $1

      # Record the specificity_dirname only if it's in the list of
      # valid preferences
      if records_by_pref[specificity_dirname]
        records_by_pref[specificity_dirname] << manifest_record
      end
    end
  end

  best_pref = preferences.find { |pref| !records_by_pref[pref].empty? }

  raise Chef::Exceptions::FileNotFound, "cookbook #{name} (#{version}) has no directory #{segment}/default/#{dirname}" unless best_pref

  records_by_pref[best_pref]
end

#relative_filenames_in_preferred_directory(node, segment, dirname) ⇒ Object



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# File 'lib/chef/cookbook_version.rb', line 431

def relative_filenames_in_preferred_directory(node, segment, dirname)
  preferences = preferences_for_path(node, segment, dirname)
  filenames_by_pref = Hash.new
  preferences.each { |pref| filenames_by_pref[pref] = Array.new }

  manifest[segment].each do |manifest_record|
    manifest_record_path = manifest_record[:path]

    # find the NON SPECIFIC filenames, but prefer them by filespecificity.
    # For example, if we have a file:
    # 'files/default/somedir/somefile.conf' we only keep
    # 'somedir/somefile.conf'. If there is also
    # 'files/$hostspecific/somedir/otherfiles' that matches the requested
    # hostname specificity, that directory will win, as it is more specific.
    #
    # This is clearly ugly b/c the use case is for remote directory, where
    # we're just going to make cookbook_files out of these and make the
    # cookbook find them by filespecificity again. but it's the shortest
    # path to "success" for now.
    if manifest_record_path =~ /(#{Regexp.escape(segment.to_s)}\/[^\/]+\/#{Regexp.escape(dirname)})\/.+$/
      specificity_dirname = $1
      non_specific_path = manifest_record_path[/#{Regexp.escape(segment.to_s)}\/[^\/]+\/#{Regexp.escape(dirname)}\/(.+)$/, 1]
      # Record the specificity_dirname only if it's in the list of
      # valid preferences
      if filenames_by_pref[specificity_dirname]
        filenames_by_pref[specificity_dirname] << non_specific_path
      end
    end
  end

  best_pref = preferences.find { |pref| !filenames_by_pref[pref].empty? }

  raise Chef::Exceptions::FileNotFound, "cookbook #{name} has no directory #{segment}/default/#{dirname}" unless best_pref

  filenames_by_pref[best_pref]

end

#reload_metadata!Object



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# File 'lib/chef/cookbook_version.rb', line 595

def reload_metadata!
  if File.exists?()
    .from_json(IO.read())
  end
end

#save_urlObject

Return the URL to save (PUT) this object to the server via the REST api. If there is an existing document on the server and it is marked frozen, a PUT will result in a 409 Conflict.



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# File 'lib/chef/cookbook_version.rb', line 615

def save_url
  "cookbooks/#{name}/#{version}"
end

#segment_filenames(segment) ⇒ Object



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# File 'lib/chef/cookbook_version.rb', line 350

def segment_filenames(segment)
  unless COOKBOOK_SEGMENTS.include?(segment)
    raise ArgumentError, "invalid segment #{segment}: must be one of #{COOKBOOK_SEGMENTS.join(', ')}"
  end

  case segment.to_sym
  when :resources
    @resource_filenames
  when :providers
    @provider_filenames
  when :recipes
    @recipe_filenames
  when :libraries
    @library_filenames
  when :definitions
    @definition_filenames
  when :attributes
    @attribute_filenames
  when :files
    @file_filenames
  when :templates
    @template_filenames
  when :root_files
    @root_filenames
  end
end

#to_hashObject



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# File 'lib/chef/cookbook_version.rb', line 548

def to_hash
  result = manifest.dup
  result['frozen?'] = frozen_version?
  result['chef_type'] = 'cookbook_version'
  result.to_hash
end

#to_json(*a) ⇒ Object



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# File 'lib/chef/cookbook_version.rb', line 555

def to_json(*a)
  result = self.to_hash
  result['json_class'] = self.class.name
  result.to_json(*a)
end

#versionObject



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# File 'lib/chef/cookbook_version.rb', line 216

def version
  .version
end

#version=(new_version) ⇒ Object



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# File 'lib/chef/cookbook_version.rb', line 231

def version=(new_version)
  manifest["version"] = new_version
  .version(new_version)
end