class Sprockets::Context

# => "file:///path/to/app/javascripts/foo.js?type=application/javascript"
resolve("foo.js")

4.x

# => "file:///path/to/app/javascripts/foo.js?type=application/javascript"
resolve("foo.js", compat: false)

# => "/path/to/app/javascripts/foo.js"
resolve("foo.js", compat: true)

# => "/path/to/app/javascripts/foo.js"
resolve("foo.js")

3.x

# => "/path/to/app/javascripts/foo.js"
resolve("foo.js")

2.x

compatible plain filename String. 4.x will always return an Asset URI.
Deprecated: Change default return type of resolve() to return 2.x

def resolve_with_compat(path, options = {})
  options = options.dup
  # Support old :content_type option, prefer :accept going forward
  if type = options.delete(:content_type)
    type = self.content_type if type == :self
    options[:accept] ||= type
  end
  if options.delete(:compat) { true }
    uri = resolve_without_compat(path, options)
    path, _ = environment.parse_asset_uri(uri)
    path
  else
    resolve_without_compat(path, options)
  end
end