523 lines
16 KiB
Ruby
523 lines
16 KiB
Ruby
# frozen_string_literal: true
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module Jekyll
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class Document
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include Comparable
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extend Forwardable
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attr_reader :path, :site, :extname, :collection, :type
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attr_accessor :content, :output
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def_delegator :self, :read_post_data, :post_read
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YAML_FRONT_MATTER_REGEXP = %r!\A(---\s*\n.*?\n?)^((---|\.\.\.)\s*$\n?)!m.freeze
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DATELESS_FILENAME_MATCHER = %r!^(?:.+/)*(.*)(\.[^.]+)$!.freeze
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DATE_FILENAME_MATCHER = %r!^(?>.+/)*?(\d{2,4}-\d{1,2}-\d{1,2})-([^/]*)(\.[^.]+)$!.freeze
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SASS_FILE_EXTS = %w(.sass .scss).freeze
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YAML_FILE_EXTS = %w(.yaml .yml).freeze
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#
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# Class-wide cache to stash and retrieve regexp to detect "super-directories"
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# of a particular Jekyll::Document object.
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#
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# dirname - The *special directory* for the Document.
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# e.g. "_posts" or "_drafts" for Documents from the `site.posts` collection.
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def self.superdirs_regex(dirname)
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@superdirs_regex ||= {}
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@superdirs_regex[dirname] ||= %r!#{dirname}.*!
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end
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#
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# Create a new Document.
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#
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# path - the path to the file
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# relations - a hash with keys :site and :collection, the values of which
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# are the Jekyll::Site and Jekyll::Collection to which this
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# Document belong.
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#
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# Returns nothing.
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def initialize(path, relations = {})
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@site = relations[:site]
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@path = path
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@extname = File.extname(path)
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@collection = relations[:collection]
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@type = @collection.label.to_sym
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@has_yaml_header = nil
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if draft?
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categories_from_path("_drafts")
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else
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categories_from_path(collection.relative_directory)
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end
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data.default_proc = proc do |_, key|
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site.frontmatter_defaults.find(relative_path, type, key)
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end
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trigger_hooks(:post_init)
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end
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# Fetch the Document's data.
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#
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# Returns a Hash containing the data. An empty hash is returned if
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# no data was read.
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def data
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@data ||= {}
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end
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# Merge some data in with this document's data.
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#
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# Returns the merged data.
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def merge_data!(other, source: "YAML front matter")
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merge_categories!(other)
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Utils.deep_merge_hashes!(data, other)
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merge_date!(source)
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data
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end
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# Returns the document date. If metadata is not present then calculates it
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# based on Jekyll::Site#time or the document file modification time.
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#
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# Return document date string.
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def date
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data["date"] ||= (draft? ? source_file_mtime : site.time)
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end
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# Return document file modification time in the form of a Time object.
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#
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# Return document file modification Time object.
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def source_file_mtime
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File.mtime(path)
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end
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# Returns whether the document is a draft. This is only the case if
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# the document is in the 'posts' collection but in a different
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# directory than '_posts'.
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#
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# Returns whether the document is a draft.
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def draft?
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data["draft"] ||= relative_path.index(collection.relative_directory).nil? &&
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collection.label == "posts"
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end
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# The path to the document, relative to the collections_dir.
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#
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# Returns a String path which represents the relative path from the collections_dir
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# to this document.
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def relative_path
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@relative_path ||= path.sub("#{site.collections_path}/", "")
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end
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# The output extension of the document.
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#
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# Returns the output extension
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def output_ext
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@output_ext ||= Jekyll::Renderer.new(site, self).output_ext
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end
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# The base filename of the document, without the file extname.
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#
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# Returns the basename without the file extname.
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def basename_without_ext
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@basename_without_ext ||= File.basename(path, ".*")
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end
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# The base filename of the document.
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#
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# Returns the base filename of the document.
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def basename
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@basename ||= File.basename(path)
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end
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# Produces a "cleaned" relative path.
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# The "cleaned" relative path is the relative path without the extname
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# and with the collection's directory removed as well.
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# This method is useful when building the URL of the document.
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#
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# NOTE: `String#gsub` removes all trailing periods (in comparison to `String#chomp`)
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#
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# Examples:
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# When relative_path is "_methods/site/generate...md":
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# cleaned_relative_path
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# # => "/site/generate"
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#
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# Returns the cleaned relative path of the document.
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def cleaned_relative_path
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@cleaned_relative_path ||=
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relative_path[0..-extname.length - 1]
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.sub(collection.relative_directory, "")
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.gsub(%r!\.*\z!, "")
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end
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# Determine whether the document is a YAML file.
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#
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# Returns true if the extname is either .yml or .yaml, false otherwise.
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def yaml_file?
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YAML_FILE_EXTS.include?(extname)
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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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SASS_FILE_EXTS.include?(extname)
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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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extname == ".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 false if the document is either an asset file or a yaml file,
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# or if the document doesn't contain any Liquid Tags or Variables,
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# true 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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!(coffeescript_file? || yaml_file? || !Utils.has_liquid_construct?(content))
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end
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# Determine whether the file should be rendered with a layout.
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#
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# Returns true if the Front Matter specifies that `layout` is set to `none`.
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def no_layout?
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data["layout"] == "none"
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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 set to `layouts: none`, or is either an
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# asset file or a yaml file. Returns true otherwise.
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def place_in_layout?
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!(asset_file? || yaml_file? || no_layout?)
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end
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# The URL template where the document would be accessible.
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#
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# Returns the URL template for the document.
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def url_template
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collection.url_template
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end
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# Construct a Hash of key-value pairs which contain a mapping between
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# a key in the URL template and the corresponding value for this document.
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#
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# Returns the Hash of key-value pairs for replacement in the URL.
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def url_placeholders
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@url_placeholders ||= Drops::UrlDrop.new(self)
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end
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# The permalink for this Document.
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# Permalink is set via the data Hash.
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#
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# Returns the permalink or nil if no permalink was set in the data.
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def permalink
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data && data.is_a?(Hash) && data["permalink"]
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end
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# The computed URL for the document. See `Jekyll::URL#to_s` for more details.
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#
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# Returns the computed URL for the document.
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def url
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@url ||= URL.new(
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:template => url_template,
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:placeholders => url_placeholders,
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:permalink => permalink
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).to_s
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end
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def [](key)
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data[key]
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end
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# The full path to the output file.
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#
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# base_directory - the base path of the output directory
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#
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# Returns the full path to the output file of this document.
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def destination(base_directory)
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dest = site.in_dest_dir(base_directory)
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path = site.in_dest_dir(dest, URL.unescape_path(url))
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if url.end_with? "/"
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path = File.join(path, "index.html")
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else
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path << output_ext unless path.end_with? output_ext
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end
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path
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end
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# Write the generated Document 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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trigger_hooks(:post_write)
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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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#
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# Returns 'false' if the 'published' key is specified in the
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# YAML front-matter and is 'false'. Otherwise returns 'true'.
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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 in the file and assign the content and data based on the file contents.
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# Merge the frontmatter of the file with the frontmatter default
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# values
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#
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# Returns nothing.
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def read(opts = {})
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Jekyll.logger.debug "Reading:", relative_path
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if yaml_file?
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@data = SafeYAML.load_file(path)
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else
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begin
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merge_defaults
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read_content(opts)
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read_post_data
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rescue StandardError => e
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handle_read_error(e)
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end
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end
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end
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# Create a Liquid-understandable version of this Document.
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#
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# Returns a Hash representing this Document's data.
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def to_liquid
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@to_liquid ||= Drops::DocumentDrop.new(self)
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end
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# The inspect string for this document.
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# Includes the relative path and the collection label.
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#
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# Returns the inspect string for this document.
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def inspect
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"#<#{self.class} #{relative_path} collection=#{collection.label}>"
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end
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# The string representation for this document.
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#
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# Returns the content of the document
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def to_s
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output || content || "NO CONTENT"
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end
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# Compare this document against another document.
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# Comparison is a comparison between the 2 paths of the documents.
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#
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# Returns -1, 0, +1 or nil depending on whether this doc's path is less than,
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# equal or greater than the other doc's path. See String#<=> for more details.
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def <=>(other)
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return nil unless other.respond_to?(:data)
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cmp = data["date"] <=> other.data["date"]
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cmp = path <=> other.path if cmp.nil? || cmp.zero?
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cmp
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end
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# Determine whether this document should be written.
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# Based on the Collection to which it belongs.
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#
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# True if the document has a collection and if that collection's #write?
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# method returns true, and if the site's Publisher will publish the document.
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# False otherwise.
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def write?
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collection&.write? && site.publisher.publish?(self)
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end
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# The Document excerpt_separator, from the YAML Front-Matter or site
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# default excerpt_separator value
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#
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# Returns the document excerpt_separator
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def excerpt_separator
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@excerpt_separator ||= (data["excerpt_separator"] || site.config["excerpt_separator"]).to_s
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end
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# Whether to generate an excerpt
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#
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# Returns true if the excerpt separator is configured.
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def generate_excerpt?
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!excerpt_separator.empty?
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end
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def next_doc
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pos = collection.docs.index { |post| post.equal?(self) }
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collection.docs[pos + 1] if pos && pos < collection.docs.length - 1
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end
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def previous_doc
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pos = collection.docs.index { |post| post.equal?(self) }
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collection.docs[pos - 1] if pos && pos.positive?
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end
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def trigger_hooks(hook_name, *args)
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Jekyll::Hooks.trigger collection.label.to_sym, hook_name, self, *args if collection
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Jekyll::Hooks.trigger :documents, hook_name, self, *args
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end
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def id
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@id ||= File.join(File.dirname(url), (data["slug"] || basename_without_ext).to_s)
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end
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# Calculate related posts.
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#
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# Returns an Array of related Posts.
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def related_posts
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@related_posts ||= Jekyll::RelatedPosts.new(self).build
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end
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# Override of method_missing to check in @data for the key.
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def method_missing(method, *args, &blck)
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if data.key?(method.to_s)
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Jekyll::Deprecator.deprecation_message "Document##{method} is now a key "\
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"in the #data hash."
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Jekyll::Deprecator.deprecation_message "Called by #{caller(0..0)}."
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data[method.to_s]
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else
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super
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end
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end
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def respond_to_missing?(method, *)
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data.key?(method.to_s) || super
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end
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# Add superdirectories of the special_dir to categories.
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# In the case of es/_posts, 'es' is added as a category.
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# In the case of _posts/es, 'es' is NOT added as a category.
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#
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# Returns nothing.
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def categories_from_path(special_dir)
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superdirs = relative_path.sub(Document.superdirs_regex(special_dir), "")
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superdirs = superdirs.split(File::SEPARATOR)
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superdirs.reject! { |c| c.empty? || c == special_dir || c == basename }
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merge_data!({ "categories" => superdirs }, :source => "file path")
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end
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def populate_categories
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categories = Array(data["categories"]) + Utils.pluralized_array_from_hash(
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data, "category", "categories"
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)
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categories.map!(&:to_s)
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categories.flatten!
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categories.uniq!
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merge_data!("categories" => categories)
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end
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def populate_tags
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tags = Utils.pluralized_array_from_hash(data, "tag", "tags")
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tags.flatten!
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merge_data!("tags" => tags)
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end
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private
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def merge_categories!(other)
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if other.key?("categories") && !other["categories"].nil?
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other["categories"] = other["categories"].split if other["categories"].is_a?(String)
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other["categories"] = (data["categories"] || []) | other["categories"]
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end
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end
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def merge_date!(source)
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if data.key?("date")
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data["date"] = Utils.parse_date(
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data["date"].to_s,
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"Document '#{relative_path}' does not have a valid date in the #{source}."
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)
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end
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end
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def merge_defaults
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defaults = @site.frontmatter_defaults.all(relative_path, type)
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merge_data!(defaults, :source => "front matter defaults") unless defaults.empty?
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end
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def read_content(opts)
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self.content = File.read(path, Utils.merged_file_read_opts(site, opts))
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if content =~ YAML_FRONT_MATTER_REGEXP
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self.content = $POSTMATCH
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data_file = SafeYAML.load(Regexp.last_match(1))
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merge_data!(data_file, :source => "YAML front matter") if data_file
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end
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end
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def read_post_data
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populate_title
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populate_categories
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populate_tags
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generate_excerpt
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end
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def handle_read_error(error)
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if error.is_a? Psych::SyntaxError
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Jekyll.logger.error "Error:", "YAML Exception reading #{path}: #{error.message}"
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else
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Jekyll.logger.error "Error:", "could not read file #{path}: #{error.message}"
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end
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if site.config["strict_front_matter"] || error.is_a?(Jekyll::Errors::FatalException)
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raise error
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end
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end
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def populate_title
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if relative_path =~ DATE_FILENAME_MATCHER
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date, slug, ext = Regexp.last_match.captures
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modify_date(date)
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elsif relative_path =~ DATELESS_FILENAME_MATCHER
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slug, ext = Regexp.last_match.captures
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end
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# slugs shouldn't end with a period
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# `String#gsub!` removes all trailing periods (in comparison to `String#chomp!`)
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slug.gsub!(%r!\.*\z!, "")
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# Try to ensure the user gets a title.
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data["title"] ||= Utils.titleize_slug(slug)
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# Only overwrite slug & ext if they aren't specified.
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data["slug"] ||= slug
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data["ext"] ||= ext
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end
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def modify_date(date)
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if !data["date"] || data["date"].to_i == site.time.to_i
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merge_data!({ "date" => date }, :source => "filename")
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end
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end
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def generate_excerpt
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data["excerpt"] ||= Jekyll::Excerpt.new(self) if generate_excerpt?
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end
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end
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end
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