Support for propshaft

[jcoyne]

Similar to #235, when using propshaft rather than sprockets

the deploy:assets:backup_manifest task fails because propshaft makes a manifest named: public/assets/.manifest.json which does not match the existing patterns in :assets_manifests

[mattbrictson]

@jcoyne can you help me understand what supporting propshaft would entail? Is this a matter of updating the capistrano-rails REAMDE with some guidance on what value propshaft users should use for :assets_manifests, or is it a more fundamental code change?

[jcoyne]

@mattbrictson I imaging it would just add a new pattern in here:

rails/lib/capistrano/tasks/assets.rake

Line 139 in 082255a

%w[.sprockets-manifest* manifest*.*].map do |pattern|

that matches the manifest that Propshaft uses:
https://github.com/rails/propshaft/blob/793a20e74201cd6c97f22fb8df75f353e7aebe5b/lib/propshaft/processor.rb#L4

[jcoyne]

I've done this and it works as a workaround:

set :assets_manifests, -> {
    [release_path.join("public", fetch(:assets_prefix), '.manifest.json')]
}

But now that propshaft is included by Rails, it makes sense to make this a default part of capistrano-rails.

[HLFH]

I have set in config/deploy.rb:

set :assets_manifests, -> {
    [release_path.join("public", fetch(:assets_prefix), '.manifest.json')]
}

as advised.

And this works well with propshaft.