Search related resources doesn't have a checksum parameter

[tokuhirom]

Is your feature request related to a problem? Please describe.

in sphinx, normally, generated HTML include javascript/css using checksum paramter.

    <link rel="stylesheet" type="text/css" href="_static/pygments.css?v=5ecbeea2" />
    <link rel="stylesheet" type="text/css" href="_static/basic.css?v=b08954a9" />
    <link rel="stylesheet" type="text/css" href="_static/alabaster.css?v=27fed22d" />
    <script src="_static/documentation_options.js?v=82b2555a"></script>
    <script src="_static/doctools.js?v=9bcbadda"></script>
    <script src="_static/sphinx_highlight.js?v=dc90522c"></script>
    <script src="_static/translations.js?v=4755f45a"></script>

https://github.com/sphinx-doc/sphinx/blob/master/sphinx/themes/basic/layout.html#L77

but, in search.html, doesn't use the checksum value for searchtools.js/language_data.js.

    <script src="_static/documentation_options.js?v=82b2555a"></script>
    <script src="_static/doctools.js?v=9bcbadda"></script>
    <script src="_static/sphinx_highlight.js?v=dc90522c"></script>
    <script src="_static/translations.js?v=4755f45a"></script>
    <script src="_static/searchtools.js"></script>
    <script src="_static/language_data.js"></script>

https://github.com/sphinx-doc/sphinx/blob/master/sphinx/themes/basic/search.html#L6-L7

I suggest to add the checksum value to the javascripts that used in search.html to omit cache related issues.

Describe the solution you'd like

Add the app.add_search_js_file to manage the search related js files.

Describe alternatives you've considered

Expose the checksum related functions to the templates.

Current version of the js_tag(str) doesn't support checksum ...

sphinx/sphinx/builders/html/__init__.py

Line 1150 in 2fa51bb

if not isinstance(js, _JavaScript):

Additional context

If there's a add_search_js_file API, it makes easy to support the issues like #13395

[manasshete]

sphinx-build -b html sourcedir outputdir -T -v