/
resolve.rb
210 lines (173 loc) · 6.71 KB
/
resolve.rb
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require 'set'
require 'sprockets/http_utils'
require 'sprockets/path_dependency_utils'
require 'sprockets/uri_utils'
module Sprockets
module Resolve
include HTTPUtils, PathDependencyUtils, URIUtils
# Public: Find Asset URI for given a logical path by searching the
# environment's load paths.
#
# resolve("application.js")
# # => "file:///path/to/app/javascripts/application.js?type=application/javascript"
#
# An accept content type can be given if the logical path doesn't have a
# format extension.
#
# resolve("application", accept: "application/javascript")
# # => "file:///path/to/app/javascripts/application.coffee?type=application/javascript"
#
# The String Asset URI is returned or nil if no results are found.
def resolve(path, options = {})
path = path.to_s
paths = options[:load_paths] || config[:paths]
accept = options[:accept]
if valid_asset_uri?(path)
uri, deps = resolve_asset_uri(path)
elsif absolute_path?(path)
filename, type, deps = resolve_absolute_path(paths, path, accept)
elsif relative_path?(path)
filename, type, pipeline, deps = resolve_relative_path(paths, path, options[:base_path], accept)
else
filename, type, pipeline, deps = resolve_logical_path(paths, path, accept)
end
if filename
params = {}
params[:type] = type if type
params[:pipeline] = pipeline if pipeline
params[:pipeline] = options[:pipeline] if options[:pipeline]
uri = build_asset_uri(filename, params)
end
return uri, deps
end
# Public: Same as resolve() but raises a FileNotFound exception instead of
# nil if no assets are found.
def resolve!(path, options = {})
uri, deps = resolve(path, options.merge(compat: false))
unless uri
message = "couldn't find file '#{path}'"
if relative_path?(path) && options[:base_path]
load_path, _ = paths_split(config[:paths], options[:base_path])
message << " under '#{load_path}'"
end
message << " with type '#{options[:accept]}'" if options[:accept]
message << "\nChecked in these paths: \n #{ config[:paths].join("\n ") }"
raise FileNotFound, message
end
return uri, deps
end
protected
def resolve_asset_uri(uri)
filename, _ = parse_asset_uri(uri)
return uri, Set.new([build_file_digest_uri(filename)])
end
def resolve_absolute_path(paths, filename, accept)
deps = Set.new
filename = File.expand_path(filename)
# Ensure path is under load paths
return nil, nil, deps unless paths_split(paths, filename)
_, mime_type, _, _ = parse_path_extnames(filename)
type = resolve_transform_type(mime_type, accept)
return nil, nil, deps if accept && !type
return nil, nil, deps unless file?(filename)
deps << build_file_digest_uri(filename)
return filename, type, deps
end
def resolve_relative_path(paths, path, dirname, accept)
filename = File.expand_path(path, dirname)
load_path, _ = paths_split(paths, dirname)
if load_path && logical_path = split_subpath(load_path, filename)
resolve_logical_path([load_path], logical_path, accept)
else
return nil, nil, Set.new
end
end
def resolve_logical_path(paths, logical_path, accept)
logical_name, mime_type, _, pipeline = parse_path_extnames(logical_path)
parsed_accept = parse_accept_options(mime_type, accept)
transformed_accepts = expand_transform_accepts(parsed_accept)
filename, mime_type, deps = resolve_under_paths(paths, logical_name, transformed_accepts)
if filename
deps << build_file_digest_uri(filename)
type = resolve_transform_type(mime_type, parsed_accept)
return filename, type, pipeline, deps
else
return nil, nil, nil, deps
end
end
def resolve_under_paths(paths, logical_name, accepts)
all_deps = Set.new
return nil, nil, all_deps if accepts.empty?
logical_basename = File.basename(logical_name)
paths.each do |load_path|
candidates, deps = path_matches(load_path, logical_name, logical_basename)
all_deps.merge(deps)
candidate = find_best_q_match(accepts, candidates) do |c, matcher|
match_mime_type?(c[1] || "application/octet-stream", matcher)
end
return candidate + [all_deps] if candidate
end
return nil, nil, all_deps
end
def parse_accept_options(mime_type, types)
accepts = []
accepts += parse_q_values(types) if types
if mime_type
if accepts.empty? || accepts.any? { |accept, _| match_mime_type?(mime_type, accept) }
accepts = [[mime_type, 1.0]]
else
return []
end
end
if accepts.empty?
accepts << ['*/*', 1.0]
end
accepts
end
def path_matches(load_path, logical_name, logical_basename)
dirname = File.dirname(File.join(load_path, logical_name))
candidates = dirname_matches(dirname, logical_basename)
deps = file_digest_dependency_set(dirname)
result = resolve_alternates(load_path, logical_name)
result[0].each do |fn|
candidates << [fn, parse_path_extnames(fn)[1]]
end
deps.merge(result[1])
dirname = File.join(load_path, logical_name)
if directory? dirname
result = dirname_matches(dirname, "index")
candidates.concat(result)
end
deps.merge(file_digest_dependency_set(dirname))
return candidates.select { |fn, _| file?(fn) }, deps
end
def dirname_matches(dirname, basename)
candidates = []
entries = self.entries(dirname)
entries.each do |entry|
name, type, _, _ = parse_path_extnames(entry)
if basename == name
candidates << [File.join(dirname, entry), type]
end
end
candidates
end
def resolve_alternates(load_path, logical_name)
return [], Set.new
end
# Internal: Returns the name, mime type and `Array` of engine extensions.
#
# "foo.js.coffee.erb"
# # => ["foo", "application/javascript", [".coffee", ".erb"]]
#
def parse_path_extnames(path)
engines = []
extname, value = match_path_extname(path, extname_map)
if extname
path = path.chomp(extname)
type, engines, pipeline = value.values_at(:type, :engines, :pipeline)
end
return path, type, engines, pipeline
end
end
end