Class: Middleman::AppCacheExtension

Inherits:
Extension
  • Object
show all
Defined in:
lib/middleman-appcache/extension.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, options_hash = {}, &block) ⇒ AppCacheExtension

Returns a new instance of AppCacheExtension.



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# File 'lib/middleman-appcache/extension.rb', line 14

def initialize app, options_hash = {}, &block
  super
  
  cache_manifest_filename = options.cache_manifest
  cache_options = options.cache
  network_options = options.network
  fallback_options = options.fallback
  use_relative = options.use_relative
  version_hash = options.version_hash

  if version_hash
  require 'digest'
  hash = Digest::MD5.new
  end

  app.after_build do |builder|
    cache = []
    
    cache_options.each do |cache_file_pattern|
      directory = File.join(config[:build_dir], cache_file_pattern)
      files_to_cache = Dir.glob(directory)
      files_to_cache.each do |file_to_cache|
        build_dir = config[:build_dir]
        build_dir = "#{build_dir}/" if use_relative
        cache << file_to_cache.gsub(build_dir, '')
 if version_hash
   hash.file file_to_cache if File.file? file_to_cache
 end
      end
    end

    manifest_file = File.join(config[:build_dir], cache_manifest_filename)
    File.open(manifest_file, "w") do |f|
      f.write "CACHE MANIFEST\n\n"

    if version_hash
 f.write "\# version #{hash.hexdigest}\n\n"
    end

      f.write "CACHE:\n"
      cache.each do |cache_file|
        f.write "#{cache_file}\n"
      end
      f.write "\n"

      if network_options.any?
        f.write "NETWORK:\n"
        network_options.each do |network_url|
          f.write "#{network_url}\n"
        end
        f.write "\n"
      end

      if fallback_options.any?
        f.write "FALLBACK:\n"
        fallback_options.each do |url, fallback_resource|
          f.write "#{url} #{fallback_resource}\n"
        end
        f.write "\n"
      end
    end

    builder.say_status :regenerated, cache_manifest_filename
  end
end