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# -*- coding: utf-8 -*- #
# frozen_string_literal: true
require 'open-uri'
LUA_SYNTAX_VERSION = "5.3"
LUA_SYNTAX_URI = "https://www.lua.org/manual/#{LUA_SYNTAX_VERSION}/"
LUA_KEYWORDS_FILE = "./lib/rouge/lexers/lua/keywords.rb"
namespace :builtins do
task :lua do
generator = Rouge::Tasks::Builtins::Lua.new
input = URI.open(LUA_SYNTAX_URI) { |f| f.read }
keywords = generator.extract_keywords(input)
output = generator.render_output(keywords)
File.write(LUA_KEYWORDS_FILE, output)
end
end
module Rouge
module Tasks
module Builtins
class Lua
def extract_keywords(input)
keywords = Hash.new { |h,k| h[k] = Array.new }
input.scrub.scan(%r[<a href="manual.html#pdf-(.+?)">\1</a>]im) do |m|
name = m[0].downcase
key = if name.start_with? "package"
"modules"
elsif name.include? "."
name.split(".").first
elsif %w(require module).include? name
"modules"
else
"basic"
end
keywords[key].push name
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 ""
yield "# This file is automatically generated by `rake builtins:lua`."
yield "# See tasks/builtins/lua.rake for more info."
yield ""
yield "module Rouge"
yield " module Lexers"
yield " class Lua"
yield " def self.builtins"
yield " @builtins ||= {}.tap do |b|"
keywords.each do |n, fs|
yield " b[#{n.inspect}] = Set.new #{fs.inspect}"
end
yield " end"
yield " end"
yield " end"
yield " end"
yield "end"
end
end
end
end
end
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