class JRuby::Lint::Libraries::Cache

Public Class Methods

new(cache_dir = nil) click to toggle source
# File lib/jruby/lint/libraries.rb, line 8
def initialize(cache_dir = nil)
  @cache_dir = cache_dir || ENV['JRUBY_LINT_CACHE'] ||
    (defined?(Gem.user_dir) && File.join(Gem.user_dir, 'lint')) || Dir::tmpdir
  FileUtils.mkdir_p(@cache_dir) unless File.directory?(@cache_dir)
end

Public Instance Methods

fetch(name) click to toggle source
# File lib/jruby/lint/libraries.rb, line 14
def fetch(name)
  filename = filename_for(name)
  if File.file?(filename) && !stale?(filename)
    File.read(filename)
  else
    read_from_wiki(name, filename)
  end
end
filename_for(name) click to toggle source
# File lib/jruby/lint/libraries.rb, line 27
def filename_for(name)
  name = File.basename(name)
  File.join(@cache_dir, File.extname(name).empty? ? "#{name}.md" : name)
end
read_from_wiki(name, filename) click to toggle source
# File lib/jruby/lint/libraries.rb, line 36
def read_from_wiki(name, filename)
  require 'open-uri'
  download = open('https://github.com/jruby/jruby/wiki/C-Extension-Alternatives.md')
  content = download.read(nil)
  File.open(filename, "w") { |f| f << content }
  content
rescue => e
  raise "Error while reading from wiki: #{e.message}\nPlease try again later."
end
stale?(filename) click to toggle source
# File lib/jruby/lint/libraries.rb, line 32
def stale?(filename)
  File.mtime(filename) < Time.now - 24 * 60 * 60
end
store(name, content) click to toggle source
# File lib/jruby/lint/libraries.rb, line 23
def store(name, content)
  File.open(filename_for(name), "w") {|f| f << content }
end