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# -*- coding: utf-8 -*- #
# frozen_string_literal: true
require 'open-uri'
require 'json'
GHERKIN_SYNTAX_URI = "https://raw.githubusercontent.com/cucumber/gherkin/main/gherkin-languages.json"
GHERKIN_KEYWORDS_FILE = "./lib/rouge/lexers/gherkin/keywords.rb"
namespace :builtins do
task :gherkin do
generator = Rouge::Tasks::Builtins::Gherkin.new
input = JSON.load(URI.open(GHERKIN_SYNTAX_URI))
keywords = generator.extract_keywords(input)
output = generator.render_output(keywords)
File.write(GHERKIN_KEYWORDS_FILE, output)
end
end
module Rouge
module Tasks
module Builtins
class Gherkin
def extract_keywords(input)
keywords = Hash.new { |h,k| h[k] = Set.new }
input.values.each do |lang|
lang.each do |k,v|
case k
when "feature"
keywords[:feature].merge v
when "background", "rule", "scenario", "scenarioOutline"
keywords[:element].merge v
when "examples"
keywords[:examples].merge v
when "given", "when", "then", "and", "but"
keywords[:step].merge v
end
end
end
keywords
end
def render_output(keywords, &b)
return enum_for(:render_output, keywords).to_a.join("\n") unless b
yield "# -*- coding: utf-8 -*- #"
yield "# frozen_string_literal: true"
yield ""
yield "# DO NOT EDIT"
yield "# This file is automatically generated by `rake builtins:gherkin`."
yield "# See tasks/builtins/gherkin.rake for more info."
yield ""
yield "module Rouge"
yield " module Lexers"
yield " def Gherkin.keywords"
yield " @keywords ||= {}.tap do |k|"
keywords.each do |t, kws|
yield " k[#{t.inspect}] = Set.new #{kws.to_a.sort.inspect}"
end
yield " end"
yield " end"
yield " end"
yield "end"
yield ""
end
end
end
end
end
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