[WIP] Add WebextManifestTransformer

[Drapegnik]

↪️ Pull Request

Depends on #3404, Resolves #3362, Resolves #1039

✔️ PR Todo

• Added/updated unit tests for this change
• Included links to related issues/PRs

[Drapegnik]

Hi! There is a question: how should I handle static assets that should be just copy-pasted to dist directory?

• _locales/
• storage/schema.json
• nacl_modules ??
• dictionaries/

[Drapegnik]

the same as in #3404 (comment) (to discuss)

[fregante]

Hi! There is a question: how should I handle static assets that should be just copy-pasted to dist directory?

• _locales/

It looks like parcel-plugin-web-extension automatically includes those assets:

function WebExtensionPlugin(bundler) {
    bundler.addAssetType('json', require.resolve('./ManifestAsset'))

    const options = bundler.options
    const locales = glob.sync(
        path.resolve(options.rootDir, '_locales/**/messages.json')
    )
    bundler.entryFiles.push(...locales)
}

nacl_modules ??

It looks like NaCl is being deprecated, so supporting it doesn't sound like a good investment.

[fregante]

What is this PR missing to be merged?

[wachunei]

Now that #3404 is closed, should this PR be recreated starting from #4313 ?

[fregante]

I’m not familiar with the implementation details, but the only thing that this manifest has in common with web manifests is the extension. Other than JSON there’s no overlap. How much code can they really share?

[101arrowz]

I've remade this in #5304. Please check there if you'd like the feature added.