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require 'active_support/concern'
require 'active_support/inflector'
module ActionView
module Helpers
module AssetTagHelper
module HelperMethods
private
def asset_path(asset_type, extension = nil)
define_method("#{asset_type}_path") do |source|
compute_public_path(source, asset_type.to_s.pluralize, extension)
end
alias_method :"path_to_#{asset_type}", :"#{asset_type}_path" # aliased to avoid conflicts with a *_path named route
end
end
module SharedHelpers
def determine_source(source, collection)
case source
when Symbol
collection[source] || raise(ArgumentError, "No expansion found for #{source.inspect}")
else
source
end
end
def join_asset_file_contents(paths)
paths.collect { |path| File.read(asset_file_path!(path, true)) }.join("\n\n")
end
def write_asset_file_contents(joined_asset_path, asset_paths)
FileUtils.mkdir_p(File.dirname(joined_asset_path))
File.atomic_write(joined_asset_path) { |cache| cache.write(join_asset_file_contents(asset_paths)) }
# Set mtime to the latest of the combined files to allow for
# consistent ETag without a shared filesystem.
mt = asset_paths.map { |p| File.mtime(asset_file_path(p)) }.max
File.utime(mt, mt, joined_asset_path)
end
def asset_file_path(path)
File.join(config.assets_dir, path.split('?').first)
end
def asset_file_path!(path, error_if_file_is_uri = false)
if is_uri?(path)
raise(Errno::ENOENT, "Asset file #{path} is uri and cannot be merged into single file") if error_if_file_is_uri
else
absolute_path = asset_file_path(path)
raise(Errno::ENOENT, "Asset file not found at '#{absolute_path}'" ) unless File.exist?(absolute_path)
return absolute_path
end
end
def collect_asset_files(*path)
dir = path.first
Dir[File.join(*path.compact)].collect do |file|
file[-(file.size - dir.size - 1)..-1].sub(/\.\w+$/, '')
end.sort
end
end
end
end
end
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