Class: Middleman::Extensions::AssetHash

Inherits:
Middleman::Extension show all
Defined in:
lib/middleman-core/extensions/asset_hash.rb

Constant Summary

Constants included from Contracts

Contracts::PATH_MATCHER

Instance Attribute Summary

Attributes inherited from Middleman::Extension

#app, #options

Instance Method Summary collapse

Methods inherited from Middleman::Extension

activated_extension, #add_exposed_to_context, #after_build, #after_configuration, #after_extension_activated, after_extension_activated, #before_build, #before_configuration, clear_after_extension_callbacks, config, define_setting, expose_to_application, expose_to_config, expose_to_template, global_config, helpers, option, #ready, resources

Methods included from Contracts

#Contract

Constructor Details

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

Returns a new instance of AssetHash.



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# File 'lib/middleman-core/extensions/asset_hash.rb', line 10

def initialize(app, options_hash={}, &block)
  super

  require 'addressable/uri'
  require 'digest/sha1'
  require 'rack/mock'

  # Allow specifying regexes to ignore, plus always ignore apple touch icons
  @ignore = Array(options.ignore) + [/^apple-touch-icon/]

  # Exclude .ico from the default list because browsers expect it
  # to be named "favicon.ico"
  @exts = options.exts || (app.config[:asset_extensions] - %w(.ico))

  app.rewrite_inline_urls id: :asset_hash,
                          url_extensions: @exts.sort.reverse,
                          source_extensions: options.sources,
                          ignore: @ignore,
                          rewrite_ignore: options.rewrite_ignore,
                          proc: method(:rewrite_url),
                          after: :asset_host
end

Instance Method Details

#ignored_resource?(resource) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/middleman-core/extensions/asset_hash.rb', line 100

def ignored_resource?(resource)
  @ignore.any? do |ignore|
    Middleman::Util.path_match(ignore, resource.destination_path)
  end
end

#manipulate_resource_list(resources) ⇒ Object 



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# File 'lib/middleman-core/extensions/asset_hash.rb', line 55

def manipulate_resource_list(resources)
  @rack_client ||= begin
    rack_app = ::Middleman::Rack.new(app).to_app
    ::Rack::MockRequest.new(rack_app)
  end

  # Process resources in order: binary images and fonts, then SVG, then JS/CSS.
  # This is so by the time we get around to the text files (which may reference
  # images and fonts) the static assets' hashes are already calculated.
  resources.sort_by do |a|
    if %w(.svg .svgz).include? a.ext
      0
    elsif %w(.js .css).include? a.ext
      1
    else
      -1
    end
  end.each(&method(:manipulate_single_resource))
end

#manipulate_single_resource(resource) ⇒ Object 



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# File 'lib/middleman-core/extensions/asset_hash.rb', line 76

def manipulate_single_resource(resource)
  return unless @exts.include?(resource.ext)
  return if ignored_resource?(resource)
  return if resource.ignored?

  digest = if resource.binary?
    ::Digest::SHA1.file(resource.source_file).hexdigest[0..7]
  else
    # Render through the Rack interface so middleware and mounted apps get a shot
    response = @rack_client.get(
      ::URI.escape(resource.destination_path),
      'bypass_inline_url_rewriter_asset_hash' => 'true'
    )

    raise "#{resource.path} should be in the sitemap!" unless response.status == 200

    ::Digest::SHA1.hexdigest(response.body)[0..7]
  end

  resource.destination_path = resource.destination_path.sub(/\.(\w+)$/) { |ext| "-#{digest}#{ext}" }
  resource
end

#rewrite_url(asset_path, dirpath, _request_path) ⇒ Object 



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# File 'lib/middleman-core/extensions/asset_hash.rb', line 34

def rewrite_url(asset_path, dirpath, _request_path)
  uri = ::Middleman::Util.parse_uri(asset_path)
  relative_path = !uri.path.start_with?('/')

  full_asset_path = if relative_path
    dirpath.join(asset_path).to_s
  else
    asset_path
  end

  return unless asset_page = app.sitemap.find_resource_by_destination_path(full_asset_path) || app.sitemap.find_resource_by_path(full_asset_path)

  replacement_path = "/#{asset_page.destination_path}"
  replacement_path = Pathname.new(replacement_path).relative_path_from(dirpath).to_s if relative_path

  replacement_path
end