Pass parameters to beforePass

[htr751]

I would like to pass parameters to my custom gatherers but I can't find how to do it. Is there any way to do so? If not is there an alternative to pass data to it?

[patrickhulce]

Thanks for filing @htr751! Would you mind explaining a little more of your use case? What parameters do you want to pass? Where are they coming from?

[htr751]

I wanted to pass some script (as a string) so I will be able to evaluate it in the context of the tested site. thought about passing it when I call lighthouse with the url of the site.

[patrickhulce]

well you have full control over your custom gatherer so you have plenty of options here just as you would with any other node code.

you could...

• read arguments from process.argv and find a custom flag you use
• read from local filesystem using fs
• read from environment variables using process.env

When you don't need to bundle the gatherer for the browser like we do in core you have a lot of flexibility here :)

Proper support for gatherer options is tracked by #10247

[patrickhulce]

We consider this problem solved by the options outlined in #10972 (comment).