Contents

# frozen_string_literal: true

class Propshaft::Compilers::CssAssetUrls
  attr_reader :assembly, :url_prefix

  ASSET_URL_PATTERN = /url\(\s*["']?(?!(?:\#|%23|data|http|\/\/))([^"'\s?#)]+)([#?][^"')]+)?\s*["']?\)/

  def initialize(assembly)
    @assembly   = assembly
    @url_prefix = File.join(assembly.config.host.to_s, assembly.config.prefix.to_s).chomp("/")
  end

  def compile(logical_path, input)
    input.gsub(ASSET_URL_PATTERN) { asset_url resolve_path(logical_path.dirname, $1), logical_path, $2, $1 }
  end

  private
    def resolve_path(directory, filename)
      if filename.start_with?("../")
        Pathname.new(directory + filename).relative_path_from("").to_s
      elsif filename.start_with?("/")
        filename.delete_prefix("/").to_s
      else
        (directory + filename.delete_prefix("./")).to_s
      end
    end

    def asset_url(resolved_path, logical_path, fingerprint, pattern)
      if asset = assembly.load_path.find(resolved_path)
        %[url("#{url_prefix}/#{asset.digested_path}#{fingerprint}")]
      else
        Propshaft.logger.warn "Unable to resolve '#{pattern}' for missing asset '#{resolved_path}' in #{logical_path}"
        %[url("#{pattern}")]
      end
    end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
propshaft-0.7.0	lib/propshaft/compilers/css_asset_urls.rb