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# frozen_string_literal: true
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# Convertible provides methods for converting a pagelike item
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# from a certain type of markup into actual content
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#
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# Requires
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# self.site -> Jekyll::Site
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# self.content
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# self.content=
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# self.data=
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# self.ext=
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# self.output=
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# self.name
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# self.path
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# self.type -> :page, :post or :draft
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module Jekyll
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module Convertible
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# Returns the contents as a String.
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def to_s
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content || ""
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end
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# Whether the file is published or not, as indicated in YAML front-matter
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def published?
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!(data.key?("published") && data["published"] == false)
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end
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# Read the YAML frontmatter.
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#
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# base - The String path to the dir containing the file.
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# name - The String filename of the file.
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# opts - optional parameter to File.read, default at site configs
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#
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# Returns nothing.
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# rubocop:disable Metrics/AbcSize
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def read_yaml(base, name, opts = {})
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filename = @path || site.in_source_dir(base, name)
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Jekyll.logger.debug "Reading:", relative_path
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begin
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self.content = File.read(filename, **Utils.merged_file_read_opts(site, opts))
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if content =~ Document::YAML_FRONT_MATTER_REGEXP
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self.content = Regexp.last_match.post_match
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self.data = SafeYAML.load(Regexp.last_match(1))
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end
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rescue Psych::SyntaxError => e
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Jekyll.logger.warn "YAML Exception reading #{filename}: #{e.message}"
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raise e if site.config["strict_front_matter"]
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rescue StandardError => e
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Jekyll.logger.warn "Error reading file #{filename}: #{e.message}"
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raise e if site.config["strict_front_matter"]
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end
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self.data ||= {}
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validate_data! filename
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validate_permalink! filename
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self.data
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end
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# rubocop:enable Metrics/AbcSize
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def validate_data!(filename)
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unless self.data.is_a?(Hash)
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raise Errors::InvalidYAMLFrontMatterError,
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"Invalid YAML front matter in #{filename}"
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end
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end
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def validate_permalink!(filename)
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if self.data["permalink"] == ""
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raise Errors::InvalidPermalinkError, "Invalid permalink in #{filename}"
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end
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end
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# Transform the contents based on the content type.
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#
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# Returns the transformed contents.
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def transform
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renderer.convert(content)
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end
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# Determine the extension depending on content_type.
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#
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# Returns the String extension for the output file.
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# e.g. ".html" for an HTML output file.
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def output_ext
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renderer.output_ext
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end
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# Determine which converter to use based on this convertible's
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# extension.
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#
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# Returns the Converter instance.
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def converters
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renderer.converters
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end
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# Render Liquid in the content
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#
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# content - the raw Liquid content to render
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# payload - the payload for Liquid
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# info - the info for Liquid
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#
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# Returns the converted content
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def render_liquid(content, payload, info, path)
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renderer.render_liquid(content, payload, info, path)
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end
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# Convert this Convertible's data to a Hash suitable for use by Liquid.
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#
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# Returns the Hash representation of this Convertible.
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def to_liquid(attrs = nil)
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further_data = \
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(attrs || self.class::ATTRIBUTES_FOR_LIQUID).each_with_object({}) do |attribute, hsh|
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hsh[attribute] = send(attribute)
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end
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Utils.deep_merge_hashes defaults, Utils.deep_merge_hashes(data, further_data)
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end
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# The type of a document,
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# i.e., its classname downcase'd and to_sym'd.
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#
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# Returns the type of self.
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def type
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:pages if is_a?(Page)
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end
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# returns the owner symbol for hook triggering
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def hook_owner
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:pages if is_a?(Page)
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end
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# Determine whether the document is an asset file.
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# Asset files include CoffeeScript files and Sass/SCSS files.
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#
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# Returns true if the extname belongs to the set of extensions
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# that asset files use.
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def asset_file?
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sass_file? || coffeescript_file?
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end
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# Determine whether the document is a Sass file.
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#
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# Returns true if extname == .sass or .scss, false otherwise.
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def sass_file?
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Jekyll::Document::SASS_FILE_EXTS.include?(ext)
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end
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# Determine whether the document is a CoffeeScript file.
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#
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# Returns true if extname == .coffee, false otherwise.
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def coffeescript_file?
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ext == ".coffee"
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end
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# Determine whether the file should be rendered with Liquid.
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#
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# Returns true if the file has Liquid Tags or Variables, false otherwise.
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def render_with_liquid?
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return false if data["render_with_liquid"] == false
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Jekyll::Utils.has_liquid_construct?(content)
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end
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# Determine whether the file should be placed into layouts.
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#
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# Returns false if the document is an asset file or if the front matter
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# specifies `layout: none`
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def place_in_layout?
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!(asset_file? || no_layout?)
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end
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# Checks if the layout specified in the document actually exists
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#
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# layout - the layout to check
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#
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# Returns true if the layout is invalid, false if otherwise
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def invalid_layout?(layout)
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!data["layout"].nil? && layout.nil? && !(is_a? Jekyll::Excerpt)
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end
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# Recursively render layouts
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#
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# layouts - a list of the layouts
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# payload - the payload for Liquid
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# info - the info for Liquid
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#
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# Returns nothing
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def render_all_layouts(layouts, payload, info)
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renderer.layouts = layouts
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self.output = renderer.place_in_layouts(output, payload, info)
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ensure
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@renderer = nil # this will allow the modifications above to disappear
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end
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# Add any necessary layouts to this convertible document.
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#
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# payload - The site payload Drop or Hash.
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# layouts - A Hash of {"name" => "layout"}.
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#
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# Returns nothing.
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def do_layout(payload, layouts)
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self.output = renderer.tap do |doc_renderer|
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doc_renderer.layouts = layouts
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doc_renderer.payload = payload
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end.run
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Jekyll.logger.debug "Post-Render Hooks:", relative_path
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Jekyll::Hooks.trigger hook_owner, :post_render, self
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ensure
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@renderer = nil # this will allow the modifications above to disappear
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end
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# Write the generated page file to the destination directory.
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#
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# dest - The String path to the destination dir.
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#
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# Returns nothing.
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def write(dest)
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path = destination(dest)
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FileUtils.mkdir_p(File.dirname(path))
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Jekyll.logger.debug "Writing:", path
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File.write(path, output, :mode => "wb")
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Jekyll::Hooks.trigger hook_owner, :post_write, self
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end
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# Accessor for data properties by Liquid.
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#
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# property - The String name of the property to retrieve.
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#
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# Returns the String value or nil if the property isn't included.
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def [](property)
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if self.class::ATTRIBUTES_FOR_LIQUID.include?(property)
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send(property)
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else
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data[property]
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end
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end
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def renderer
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@renderer ||= Jekyll::Renderer.new(site, self)
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end
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private
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def defaults
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@defaults ||= site.frontmatter_defaults.all(relative_path, type)
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end
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def no_layout?
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data["layout"] == "none"
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end
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end
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end
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