Support async rollup plugins / objectHashIgnoreUnknownHack flag from rpt2

Current Behavior

I’m using tsdx to bundle react-semantic-ui-datepickers and I can’t upgrade rollup-plugin-copy to v3 because the build fails with the error Unknown object type "asyncfunction". This is because we are not passing the flag objectHashIgnoreUnknownHack to rpt2 which would solve the issue.

Can we add support for this flag on the build command or is that kind of risky? The rpt2 documentation states: Setting this option to true will make object-hash ignore unknowns, at the cost of not invalidating the cache if ignored elements are changed.

Desired Behavior

Build can be successful if the plugin gets the flag as true.

Suggested Solution

Add an option to the build command - --ignore-unknown-hack? - that results in the objectHashIgnoreUnknownHack being true while creating the rollup config.

Who does this impact? Who is this for?

tsdx users with custom rollup configs using plugins that use async/await, for example.

Describe alternatives you’ve considered

N/A.

Additional context

N/A.

[arvinsim]

While I was searching for ways to import assets by using plugins like rollup-plugin-url and rollup-plugin-smart-asset, I get this error too.

[agilgur5]

Out-of-the-box support for async rollup plugins was just released in v0.13.0!