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# frozen_string_literal: true
module Jekyll
module Converters
class Markdown < Converter
highlighter_prefix "\n"
highlighter_suffix "\n"
safe true
def setup
return if @setup ||= false
unless (@parser = get_processor)
Jekyll.logger.error "Invalid Markdown processor given:", @config["markdown"]
if @config["safe"]
Jekyll.logger.info "", "Custom processors are not loaded in safe mode"
end
Jekyll.logger.error(
"",
"Available processors are: #{valid_processors.join(", ")}"
)
raise Errors::FatalException, "Bailing out; invalid Markdown processor."
end
@setup = true
end
# Rubocop does not allow reader methods to have names starting with `get_`
# To ensure compatibility, this check has been disabled on this method
#
# rubocop:disable Naming/AccessorMethodName
def get_processor
case @config["markdown"].downcase
when "kramdown" then return KramdownParser.new(@config)
else
custom_processor
end
end
# rubocop:enable Naming/AccessorMethodName
# Public: Provides you with a list of processors, the ones we
# support internally and the ones that you have provided to us (if you
# are not in safe mode.)
def valid_processors
%w(kramdown) + third_party_processors
end
# Public: A list of processors that you provide via plugins.
# This is really only available if you are not in safe mode, if you are
# in safe mode (re: GitHub) then there will be none.
def third_party_processors
self.class.constants - \
%w(KramdownParser PRIORITIES).map(
&:to_sym
)
end
def extname_list
@extname_list ||= @config["markdown_ext"].split(",").map do |e|
".#{e.downcase}"
end
end
def matches(ext)
extname_list.include?(ext.downcase)
end
def output_ext(_ext)
".html"
end
def convert(content)
setup
@parser.convert(content)
end
private
def custom_processor
converter_name = @config["markdown"]
if custom_class_allowed?(converter_name)
self.class.const_get(converter_name).new(@config)
end
end
# Private: Determine whether a class name is an allowed custom
# markdown class name.
#
# parser_name - the name of the parser class
#
# Returns true if the parser name contains only alphanumeric
# characters and is defined within Jekyll::Converters::Markdown
def custom_class_allowed?(parser_name)
parser_name !~ %r![^A-Za-z0-9_]! && self.class.constants.include?(
parser_name.to_sym
)
end
end
end
end