Class: PDK::Module::TemplateDir

Inherits:
Object
  • Object
show all
Defined in:
lib/pdk/module/templatedir.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(uri, module_metadata = {}, init = false) {|self| ... } ⇒ TemplateDir

Initialises the TemplateDir object with the path or URL to the template and the block of code to run to be run while the template is available.

The template directory is only guaranteed to be available on disk within the scope of the block passed to this method.

template or a URI to a git repository. Defaults to an empty Hash. the template available on disk.

Examples:

Using a git repository as a template

PDK::Module::TemplateDir.new('https://github.com/puppetlabs/pdk-templates') do |t|
  t.render do |filename, content|
    File.open(filename, 'w') do |file|
      file.write(content)
    end
  end
end

Parameters:

  • uri (PDK::Util::TemplateURI) —

    The path to a directory to use as the

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

    A Hash containing the module metadata.

Yield Parameters:

Raises:

  • (ArgumentError) —

    If no block is given to this method.



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# File 'lib/pdk/module/templatedir.rb', line 40

def initialize(uri, module_metadata = {}, init = false)
  unless block_given?
    raise ArgumentError, _('%{class_name} must be initialized with a block.') % { class_name: self.class.name }
  end
  unless uri.is_a? PDK::Util::TemplateURI
    raise ArgumentError, _('PDK::Module::TemplateDir.new must be initialized with a PDK::Util::TemplateURI, got a %{uri_type}') % { uri_type: uri.class }
  end

  if PDK::Util::Git.repo?(uri.git_remote)
    # This is either a bare local repo or a remote. either way it needs cloning.
    @path = clone_template_repo(uri)
    temp_dir_clone = true
  else
    # if it is a local path & non-bare repo then we can use it directly.
    # Still have to check the branch.
    @path = uri.shell_path
    # We don't do a checkout of local-path repos. There are lots of edge
    # cases or user un-expectations.
    if PDK::Util::Git.work_tree?(@path)
      PDK.logger.warn _("Repository '%{repo}' has a work-tree; skipping git reset.") % {
        repo: @path,
      }
    end
  end
  @cloned_from = uri.metadata_format

  @init = init
  @moduleroot_dir = File.join(@path, 'moduleroot')
  @moduleroot_init = File.join(@path, 'moduleroot_init')
  @dirs = [@moduleroot_dir]
  @dirs << @moduleroot_init if @init
  @object_dir = File.join(@path, 'object_templates')

  validate_module_template!

  @module_metadata = module_metadata

  yield self
ensure
  # If we cloned a git repo to get the template, remove the clone once
  # we're done with it.
  if temp_dir_clone
    FileUtils.remove_dir(@path)
  end
end

Instance Attribute Details

#module_metadata ⇒ Object

Returns the value of attribute module_metadata.



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# File 'lib/pdk/module/templatedir.rb', line 11

def module_metadata
  @module_metadata
end

Class Method Details

.files_in_template(dirs) ⇒ Hash{String=>String}

Get a list of template files in the template directory.

value locations.

Returns:

  • (Hash{String=>String}) —

    A hash of key file names and



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# File 'lib/pdk/module/templatedir.rb', line 223

def self.files_in_template(dirs)
  temp_paths = []
  dirlocs = []
  dirs.each do |dir|
    raise ArgumentError, _("The directory '%{dir}' doesn't exist") % { dir: dir } unless Dir.exist?(dir)
    temp_paths += Dir.glob(File.join(dir, '**', '*'), File::FNM_DOTMATCH).select do |template_path|
      if File.file?(template_path) && !File.symlink?(template_path)
        dirlocs << dir
      end
    end
    temp_paths.map do |template_path|
      template_path.sub!(%r{\A#{Regexp.escape(dir)}#{Regexp.escape(File::SEPARATOR)}}, '')
    end
  end
  Hash[temp_paths.zip dirlocs]
end

Instance Method Details

#cache_template_ref(path, ref = nil) ⇒ Object 



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# File 'lib/pdk/module/templatedir.rb', line 341

def cache_template_ref(path, ref = nil)
  @template_ref ||= PDK::Util::Git.describe(File.join(path, '.git'), ref)
end

#checkout_template_ref(path, ref) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/pdk/module/templatedir.rb', line 324

def checkout_template_ref(path, ref)
  if PDK::Util::Git.work_dir_clean?(path)
    Dir.chdir(path) do
      full_ref = PDK::Util::Git.ls_remote(path, ref)
      cache_template_ref(path, full_ref)
      reset_result = PDK::Util::Git.git('reset', '--hard', full_ref)
      return if reset_result[:exit_code].zero?

      PDK.logger.error reset_result[:stdout]
      PDK.logger.error reset_result[:stderr]
      raise PDK::CLI::FatalError, _("Unable to set HEAD of git repository at '%{repo}' to ref:'%{ref}'.") % { repo: path, ref: ref }
    end
  else
    PDK.logger.warn _("Uncommitted changes found when attempting to set HEAD of git repository at '%{repo}' to ref '%{ref}'; skipping git reset.") % { repo: path, ref: ref }
  end
end

#clone_template_repo(uri) ⇒ String

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns Path to working directory into which template repo has been cloned and reset.

Returns:

  • (String) —

    Path to working directory into which template repo has been cloned and reset

Raises:



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# File 'lib/pdk/module/templatedir.rb', line 302

def clone_template_repo(uri)
  # @todo When switching this over to using rugged, cache the cloned
  # template repo in `%AppData%` or `$XDG_CACHE_DIR` and update before
  # use.
  temp_dir = PDK::Util.make_tmpdir_name('pdk-templates')
  origin_repo = uri.git_remote
  git_ref = uri.git_ref

  clone_result = PDK::Util::Git.git('clone', origin_repo, temp_dir)

  if clone_result[:exit_code].zero?
    checkout_template_ref(temp_dir, git_ref)
  else
    PDK.logger.error clone_result[:stdout]
    PDK.logger.error clone_result[:stderr]
    raise PDK::CLI::FatalError, _("Unable to clone git repository at '%{repo}' into '%{dest}'.") % { repo: origin_repo, dest: temp_dir }
  end

  PDK::Util.canonical_path(temp_dir)
end

#config_for(dest_path, sync_config_path = nil) ⇒ Hash

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Generate a hash of data to be used when rendering the specified template.

data is for, relative to the root of the module.

‘@configs` instance variable.

Parameters:

  • dest_path (String) —

    The destination path of the file that the

Returns:

  • (Hash) —

    The data that will be available to the template via the



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# File 'lib/pdk/module/templatedir.rb', line 250

def config_for(dest_path, sync_config_path = nil)
  module_root = PDK::Util.module_root
  sync_config_path ||= File.join(module_root, '.sync.yml') unless module_root.nil?
  config_path = File.join(@path, 'config_defaults.yml')

  if @config.nil?
    conf_defaults = read_config(config_path)
    sync_config = read_config(sync_config_path) unless sync_config_path.nil?
    @config = conf_defaults
    @config.deep_merge!(sync_config, knockout_prefix: '---') unless sync_config.nil?
  end
  file_config = @config.fetch(:global, {})
  file_config['module_metadata'] = @module_metadata
  file_config.merge!(@config.fetch(dest_path, {})) unless dest_path.nil?
  file_config.merge!(@config)
end

#metadata ⇒ Hash{String => String}

Retrieve identifying metadata for the template.

For git repositories, this will return the URL to the repository and a reference to the HEAD.

Returns:

  • (Hash{String => String}) —

    A hash of identifying metadata.



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# File 'lib/pdk/module/templatedir.rb', line 94

def metadata
  {
    'pdk-version'  => PDK::Util::Version.version_string,
    'template-url' => @cloned_from,
    'template-ref' => cache_template_ref(@path),
  }
end

#object_config ⇒ Hash

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Generate a hash of data to be used when rendering object templates.

Read ‘config_defaults.yml` from the root of the template directory (if it exists) build a hash of values from the value of the `:global` key.

‘@configs` instance variable.

Returns:

  • (Hash) —

    The data that will be available to the template via the



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# File 'lib/pdk/module/templatedir.rb', line 183

def object_config
  config_for(nil)
end

#object_template_for(object_type) ⇒ Hash{Symbol => String}

Searches the template directory for template files that can be used to render files for the specified object type.

‘:defined_type`, `:fact`, etc).

template dir, otherwise ‘nil`. The returned hash can contain two keys, :object contains the path on disk to the template for the object, :spec contains the path on disk to the template for the object’s spec file (if available).

Parameters:

  • object_type (Symbol) —

    The object type, e.g. (‘:class`,

Returns:

  • (Hash{Symbol => String}) —

    if the templates are available in the



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# File 'lib/pdk/module/templatedir.rb', line 156

def object_template_for(object_type)
  object_path = File.join(@object_dir, "#{object_type}.erb")
  type_path = File.join(@object_dir, "#{object_type}_type.erb")
  spec_path = File.join(@object_dir, "#{object_type}_spec.erb")
  type_spec_path = File.join(@object_dir, "#{object_type}_type_spec.erb")

  if File.file?(object_path) && File.readable?(object_path)
    result = { object: object_path }
    result[:type] = type_path if File.file?(type_path) && File.readable?(type_path)
    result[:spec] = spec_path if File.file?(spec_path) && File.readable?(spec_path)
    result[:type_spec] = type_spec_path if File.file?(type_spec_path) && File.readable?(type_spec_path)
    result
  else
    nil
  end
end

#read_config(loc) ⇒ Hash

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Generates a hash of data from a given yaml file location.

if so.

Parameters:

  • loc (String) —

    The path of the yaml config file.

Returns:

  • (Hash) —

    The data that has been read in from the given yaml file.



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# File 'lib/pdk/module/templatedir.rb', line 277

def read_config(loc)
  if File.file?(loc) && File.readable?(loc)
    begin
      YAML.safe_load(File.read(loc), [], [], true)
    rescue Psych::SyntaxError => e
      PDK.logger.warn _("'%{file}' is not a valid YAML file: %{problem} %{context} at line %{line} column %{column}") % {
        file:    loc,
        problem: e.problem,
        context: e.context,
        line:    e.line,
        column:  e.column,
      }
      {}
    end
  else
    {}
  end
end

#render {|dest_path, dest_content| ... } ⇒ void

This method returns an undefined value.

Loop through the files in the template, yielding each rendered file to the supplied block.

relative to the root of the module. destination file.

Yield Parameters:

  • dest_path (String) —

    The path of the destination file,

  • dest_content (String) —

    The rendered content of the

Raises:



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# File 'lib/pdk/module/templatedir.rb', line 115

def render
  PDK::Module::TemplateDir.files_in_template(@dirs).each do |template_file, template_loc|
    template_file = template_file.to_s
    PDK.logger.debug(_("Rendering '%{template}'...") % { template: template_file })
    dest_path = template_file.sub(%r{\.erb\Z}, '')
    config = config_for(dest_path)
    dest_status = :manage

    if config['unmanaged']
      dest_status = :unmanage
    elsif config['delete']
      dest_status = :delete
    else
      begin
        dest_content = PDK::TemplateFile.new(File.join(template_loc, template_file), configs: config, template_dir: self).render
      rescue => error
        error_msg = _(
          "Failed to render template '%{template}'\n" \
          '%{exception}: %{message}',
        ) % { template: template_file, exception: error.class, message: error.message }
        raise PDK::CLI::FatalError, error_msg
      end
    end

    yield dest_path, dest_content, dest_status
  end
end

#validate_module_template! ⇒ void

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

This method returns an undefined value.

Validate the content of the template directory.

a directory called ‘moduleroot’.

Raises:

  • (ArgumentError) —

    If the specified path is not a directory.

  • (ArgumentError) —

    If the template directory does not contain



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# File 'lib/pdk/module/templatedir.rb', line 196

def validate_module_template!
  # rubocop:disable Style/GuardClause
  unless File.directory?(@path)
    if PDK::Util.package_install? && File.fnmatch?(File.join(PDK::Util.package_cachedir, '*'), @path)
      raise ArgumentError, _('The built-in template has substantially changed. Please run "pdk convert" on your module to continue.')
    else
      raise ArgumentError, _("The specified template '%{path}' is not a directory.") % { path: @path }
    end
  end

  unless File.directory?(@moduleroot_dir)
    raise ArgumentError, _("The template at '%{path}' does not contain a 'moduleroot/' directory.") % { path: @path }
  end

  unless File.directory?(@moduleroot_init)
    # rubocop:disable Metrics/LineLength
    raise ArgumentError, _("The template at '%{path}' does not contain a 'moduleroot_init/' directory, which indicates you are using an older style of template. Before continuing please use the --template-url flag when running the pdk new commands to pass a new style template.") % { path: @path }
    # rubocop:enable Metrics/LineLength Style/GuardClause
  end
end