This PR implements much of the static assets rework ADR [1], including:
* `npm run build[-dev]`, and its subcommands,
* `npm run webpack[-dev]` and
* `npm run compile-sass[-dev]`.
This is backwards-compatible. `paver update_assets` should not be affected.
The new command warns that it is "experimental" for a few reasons:
* `npm run build` will fail in the webpack phase unless you first
run `xmodule_assets`. This will be changed soon [2].
* We have tested the new build, but not quite so thoroughly that we'd
recommend it as the production default yet. Once the xmodule_assets
work lands, we'll share this on the forums so early adopters can try it
out.
* The commands lack some top-level documentation. Once they stabilize more,
we'll add a section to the README that explains how and when to use `npm run
build` and its subcommands and its env vars.
* `npm run watch` is not yet implemented.
References:
1. https://github.com/openedx/edx-platform/blob/master/docs/decisions/0017-reimplement-asset-processing.rst
2. https://github.com/openedx/edx-platform/pull/32685
Part of: https://github.com/openedx/edx-platform/issues/31604
We make a mostly redundant copy of Webpack bundles for prod without
chunkhashes in the file names, so that RequireJS can point to bundles
without having to understand anything about Webpack's optimization.
Meant to unblock EDUCATOR-2357 and PR #17518.
