Shadow-cljs: Add `clean` command to CLI?

[alex-dixon]

It might be reasonable have a clean command in the CLI this given how much shadow-cljs caches, and also for cleaning certain builds a la lein clean.

Thoughts?

[thheller]

My stance on this is that any time you have to run clean to fix something that is a bug that should be fixed instead. There should probably be an option to clean the output dir but cleaning the cache should never be required.

I worked pretty hard making the caching as reliable as possible. If there is something that doesn't cache properly I want to know about it. The odds of getting an actual report seem higher when there is no clean. ;)

[alex-dixon]

Agreed. I haven't had any problems after 6674f5afce106062001cb504f81bb083acd83689. I haven't worked with anything remotely as reliable as shadow-cljs' caching and reloading seems to be. It took me some time to realize I can trust it. Thanks.

[vehas]

thank for your fantastic project,
I got cache problem when I change folder name and ns name then shadow.cljs never find my chage until I manually delete .shadow-cljs folder then start shadow-cljs again

[thheller]

Just restarting without deleting cache did not work? Changing file locations or ns does definitely invalidate the cache so I'm unsure what the problem might be. If you run into this again please let me know.

[eoliphan]

Cleaning the output dir would be nice, especially as part of release