🚀 Feature Request: Auto-Purge Default Cache with `pages dev`

[helloimalastair]

Describe the solution

Currently, when using the --persist flag with wrangler pages dev, the cache is entirely persisted to disk. While this is handy for emulating/testing cache behavior, it is difficult to use it for development purposes. Conversely, --persist is handy for caching Function calls/KV entries, so just not using the flag isn't ideal.

It would be nice if there were a way to have wrangler add a key to items stored to the Cache by the Pages Fileserver and then automatically clear assets with said key whenever changes are observed in the build output directory. This might also be good to have for Functions Cache too, depending on the setup of the user's Functions.

This could be made as default behavior or as a separate flag.

[jahands]

add a key to items stored

What are some examples of these keys, and the items they contain?

[helloimalastair]

@jahands, the format of the key doesn't really matter(at least to the end user/developer), nor does it even need to be accessible to them. It would just be nice for wrangler to have a way to recognize cached static files, and clear them when the build output directory updates, or when the project is rebuilt, so that static assets are cleared.

Because while you might want to be more reluctant with clearing the Functions cache on changes, if I change something in my build output directory, I don't want to have to clear the cache folder just to have the changes show up.

[jrf0110]

This seems like a wrangler dev feature request, since wrangler pages dev inherits options from there. @rozenmd does this seem like a reasonable feature request for wrangler dev?

[rozenmd]

@cloudflare/wrangler / @cloudflare/pages - I wonder if this isn't a feature request for a base wrangler command/API for clearing the persistence cache

[helloimalastair]

@rozenmd, it might be good to have as an API, but it would also be good to have it as a flag on wrangler pages dev, so that a user doesn't have to manually clear the cache every time they reload.