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Editing: asset.rb
require 'fileutils' require 'sprockets/digest_utils' module Sprockets class Asset attr_reader :logical_path # Private: Intialize Asset wrapper from attributes Hash. # # Asset wrappers should not be initialized directly, only # Environment#find_asset should vend them. # # attributes - Hash of ivars # # Returns Asset. def initialize(environment, attributes = {}) @environment = environment @attributes = attributes @content_type = attributes[:content_type] @filename = attributes[:filename] @id = attributes[:id] @load_path = attributes[:load_path] @logical_path = attributes[:logical_path] @metadata = attributes[:metadata] @mtime = attributes[:mtime] @name = attributes[:name] @source = attributes[:source] @uri = attributes[:uri] end # Internal: Return all internal instance variables as a hash. # # Returns a Hash. def to_hash @attributes end # Public: Metadata accumulated from pipeline process. # # The API status of the keys is dependent on the pipeline processors # itself. So some values maybe considered public and others internal. # See the pipeline proccessor documentation itself. # # Returns Hash. attr_reader :metadata # Public: Returns String path of asset. attr_reader :filename # Internal: Unique asset object ID. # # Returns a String. attr_reader :id # Public: Internal URI to lookup asset by. # # NOT a publically accessible URL. # # Returns URI. attr_reader :uri # Public: Return logical path with digest spliced in. # # "foo/bar-37b51d194a7513e45b56f6524f2d51f2.js" # # Returns String. def digest_path logical_path.sub(/\.(\w+)$/) { |ext| "-#{etag}#{ext}" } end # Public: Returns String MIME type of asset. Returns nil if type is unknown. attr_reader :content_type # Public: Get all externally linked asset filenames from asset. # # All linked assets should be compiled anytime this asset is. # # Returns Set of String asset URIs. def links metadata[:links] || Set.new end # Public: Get all internally required assets that were concated into this # asset. # # Returns Array of String asset URIs. def included metadata[:included] end # Public: Return `String` of concatenated source. # # Returns String. def source if @source @source else # File is read everytime to avoid memory bloat of large binary files File.binread(filename) end end # Public: Alias for #source. # # Returns String. def to_s source end # Public: Get charset of source. # # Returns a String charset name or nil if binary. def charset metadata[:charset] end # Public: Returns Integer length of source. def length metadata[:length] end alias_method :bytesize, :length # Public: Returns String hexdigest of source. def hexdigest DigestUtils.pack_hexdigest(metadata[:digest]) end # Deprecated: Returns String hexdigest of source. # # In 4.x this will be changed to return a raw Digest byte String. alias_method :digest, :hexdigest # Pubic: ETag String of Asset. alias_method :etag, :hexdigest # Public: Returns String base64 digest of source. def base64digest DigestUtils.pack_base64digest(metadata[:digest]) end # Public: A "named information" URL for subresource integrity. def integrity DigestUtils.integrity_uri(metadata[:digest]) end # Public: Add enumerator to allow `Asset` instances to be used as Rack # compatible body objects. # # block # part - String body chunk # # Returns nothing. def each yield to_s end # Deprecated: Save asset to disk. # # filename - String target # # Returns nothing. def write_to(filename) FileUtils.mkdir_p File.dirname(filename) PathUtils.atomic_write(filename) do |f| f.write source end # Set mtime correctly File.utime(mtime, mtime, filename) nil end # Public: Pretty inspect # # Returns String. def inspect "#<#{self.class}:#{object_id.to_s(16)} #{uri.inspect}>" end # Public: Implements Object#hash so Assets can be used as a Hash key or # in a Set. # # Returns Integer hash of the id. def hash id.hash end # Public: Compare assets. # # Assets are equal if they share the same path and digest. # # Returns true or false. def eql?(other) self.class == other.class && self.id == other.id end alias_method :==, :eql? end end
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