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collection.rb
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collection.rb
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# frozen_string_literal: true
module Jekyll
class Collection
attr_reader :site, :label, :metadata
attr_writer :docs
# Create a new Collection.
#
# site - the site to which this collection belongs.
# label - the name of the collection
#
# Returns nothing.
def initialize(site, label)
@site = site
@label = sanitize_label(label)
@metadata = extract_metadata
end
# Fetch the Documents in this collection.
# Defaults to an empty array if no documents have been read in.
#
# Returns an array of Jekyll::Document objects.
def docs
@docs ||= []
end
# Override of normal respond_to? to match method_missing's logic for
# looking in @data.
def respond_to_missing?(method, include_private = false)
docs.respond_to?(method.to_sym, include_private) || super
end
# Override of method_missing to check in @data for the key.
def method_missing(method, *args, &blck)
if docs.respond_to?(method.to_sym)
Jekyll.logger.warn "Deprecation:",
"#{label}.#{method} should be changed to #{label}.docs.#{method}."
Jekyll.logger.warn "", "Called by #{caller(0..0)}."
docs.public_send(method.to_sym, *args, &blck)
else
super
end
end
# Fetch the static files in this collection.
# Defaults to an empty array if no static files have been read in.
#
# Returns an array of Jekyll::StaticFile objects.
def files
@files ||= []
end
# Read the allowed documents into the collection's array of docs.
#
# Returns the sorted array of docs.
def read
filtered_entries.each do |file_path|
full_path = collection_dir(file_path)
next if File.directory?(full_path)
if Utils.has_yaml_header? full_path
read_document(full_path)
else
read_static_file(file_path, full_path)
end
end
sort_docs!
end
# All the entries in this collection.
#
# Returns an Array of file paths to the documents in this collection
# relative to the collection's directory
def entries
return [] unless exists?
@entries ||= begin
collection_dir_slash = "#{collection_dir}/"
Utils.safe_glob(collection_dir, ["**", "*"], File::FNM_DOTMATCH).map do |entry|
entry[collection_dir_slash] = ""
entry
end
end
end
# Filtered version of the entries in this collection.
# See `Jekyll::EntryFilter#filter` for more information.
#
# Returns a list of filtered entry paths.
def filtered_entries
return [] unless exists?
@filtered_entries ||=
Dir.chdir(directory) do
entry_filter.filter(entries).reject do |f|
path = collection_dir(f)
File.directory?(path) || entry_filter.symlink?(f)
end
end
end
# The directory for this Collection, relative to the site source or the directory
# containing the collection.
#
# Returns a String containing the directory name where the collection
# is stored on the filesystem.
def relative_directory
@relative_directory ||= "_#{label}"
end
# The full path to the directory containing the collection.
#
# Returns a String containing th directory name where the collection
# is stored on the filesystem.
def directory
@directory ||= site.in_source_dir(
File.join(container, relative_directory)
)
end
# The full path to the directory containing the collection, with
# optional subpaths.
#
# *files - (optional) any other path pieces relative to the
# directory to append to the path
#
# Returns a String containing th directory name where the collection
# is stored on the filesystem.
def collection_dir(*files)
return directory if files.empty?
site.in_source_dir(container, relative_directory, *files)
end
# Checks whether the directory "exists" for this collection.
# The directory must exist on the filesystem and must not be a symlink
# if in safe mode.
#
# Returns false if the directory doesn't exist or if it's a symlink
# and we're in safe mode.
def exists?
File.directory?(directory) && !entry_filter.symlink?(directory)
end
# The entry filter for this collection.
# Creates an instance of Jekyll::EntryFilter.
#
# Returns the instance of Jekyll::EntryFilter for this collection.
def entry_filter
@entry_filter ||= Jekyll::EntryFilter.new(site, relative_directory)
end
# An inspect string.
#
# Returns the inspect string
def inspect
"#<#{self.class} @label=#{label} docs=#{docs}>"
end
# Produce a sanitized label name
# Label names may not contain anything but alphanumeric characters,
# underscores, and hyphens.
#
# label - the possibly-unsafe label
#
# Returns a sanitized version of the label.
def sanitize_label(label)
label.gsub(%r![^a-z0-9_\-\.]!i, "")
end
# Produce a representation of this Collection for use in Liquid.
# Exposes two attributes:
# - label
# - docs
#
# Returns a representation of this collection for use in Liquid.
def to_liquid
Drops::CollectionDrop.new self
end
# Whether the collection's documents ought to be written as individual
# files in the output.
#
# Returns true if the 'write' metadata is true, false otherwise.
def write?
!!metadata.fetch("output", false)
end
# The URL template to render collection's documents at.
#
# Returns the URL template to render collection's documents at.
def url_template
@url_template ||= metadata.fetch("permalink") do
Utils.add_permalink_suffix("/:collection/:path", site.permalink_style)
end
end
# Extract options for this collection from the site configuration.
#
# Returns the metadata for this collection
def extract_metadata
if site.config["collections"].is_a?(Hash)
site.config["collections"][label] || {}
else
{}
end
end
private
def container
@container ||= site.config["collections_dir"]
end
def read_document(full_path)
doc = Document.new(full_path, :site => site, :collection => self)
doc.read
docs << doc if site.unpublished || doc.published?
end
def sort_docs!
if metadata["order"].is_a?(Array)
rearrange_docs!
elsif metadata["sort_by"].is_a?(String)
sort_docs_by_key!
else
docs.sort!
end
end
# A custom sort function based on Schwartzian transform
# Refer https://byparker.com/blog/2017/schwartzian-transform-faster-sorting/ for details
def sort_docs_by_key!
meta_key = metadata["sort_by"]
# Modify `docs` array to cache document's property along with the Document instance
docs.map! { |doc| [doc.data[meta_key], doc] }.sort! do |apples, olives|
order = determine_sort_order(meta_key, apples, olives)
# Fall back to `Document#<=>` if the properties were equal or were non-sortable
# Otherwise continue with current sort-order
if order.nil? || order.zero?
apples[-1] <=> olives[-1]
else
order
end
# Finally restore the `docs` array with just the Document objects themselves
end.map!(&:last)
end
def determine_sort_order(sort_key, apples, olives)
apple_property, apple_document = apples
olive_property, olive_document = olives
if apple_property.nil? && !olive_property.nil?
order_with_warning(sort_key, apple_document, 1)
elsif !apple_property.nil? && olive_property.nil?
order_with_warning(sort_key, olive_document, -1)
else
apple_property <=> olive_property
end
end
def order_with_warning(sort_key, document, order)
Jekyll.logger.warn "Sort warning:", "'#{sort_key}' not defined in #{document.relative_path}"
order
end
# Rearrange documents within the `docs` array as listed in the `metadata["order"]` array.
#
# Involves converting the two arrays into hashes based on relative_paths as keys first, then
# merging them to remove duplicates and finally retrieving the Document instances from the
# merged array.
def rearrange_docs!
docs_table = {}
custom_order = {}
# pre-sort to normalize default array across platforms and then proceed to create a Hash
# from that sorted array.
docs.sort.each do |doc|
docs_table[doc.relative_path] = doc
end
metadata["order"].each do |entry|
custom_order[File.join(relative_directory, entry)] = nil
end
result = Jekyll::Utils.deep_merge_hashes(custom_order, docs_table).values
result.compact!
self.docs = result
end
def read_static_file(file_path, full_path)
relative_dir = Jekyll.sanitized_path(
relative_directory,
File.dirname(file_path)
).chomp("/.")
files << StaticFile.new(
site,
site.source,
relative_dir,
File.basename(full_path),
self
)
end
end
end