Include data URI assets in manifest

[arasmussen]

• Manifest Plugin Version: 5.0.0

Feature Use Case

I might be misunderstanding the purpose of this tool... I'm trying to replace webpack-isomorphic-tools and essentially need a new webpack-assets.json. webpack-assets.json was a mapping from asset import paths to asset URLs (regular URLs or base64 URLs).

I'm thinking webpack-manifest-plugin might be the right solution here, but it currently only includes emitted files in its mapping (e.g. from file-loader or type: 'asset/resource'), but not base64 assets (e.g. from url-loader or type: 'asset/inline').

Feature Proposal

In addition to including an asset mapping for emitted files:

{
  "sdk.js": "https://example.com/sdk.js"
}

... also include asset mapping for non-emitted files:

{
  "sdk.js": "https://example.com/sdk.js"
  "img.png": "data:image/svg+xml;base64,PHN2ZyB4bWx...",
}

If you're worried about this impacting existing setups, I think it'd be pretty easy to put it behind a default false flag like includeNonEmittedFiles or something.