Can no longer specify paths to custom schemas

Previously, you could use config to pass the path of a .json config file to define custom entities. This no longer works, because config takes a list of names and not paths. Passing in a path will not work as the path of pybids configs will be appended to it.

This might be a problem for some users, and we could potentially add this functionality back in.

@effigies this affects fitlins. can you live without this feature? it looks like you pass a custom set of entities only when using BIDSLayout for outputting new paths, in which case you could potentially just use a basic grabbit Layout which still accepts full paths in its API.

[tyarkoni]

Let’s go with the module-level add_config() approach; I think it makes sense to be explicit about something like this, and the pybids codebase is already pretty bloated with type-checking and validation. Want to open a PR?

[adelavega]

That would work for me.

The alternative is to allow config to take either keywords (bids or derivatives) or paths. If an elemnt of the list is not one of the reserved keywords, it can be assumed to be a full path. I suppose that makes the API a bit more complex, but it seems like a reasonable amount.

As an aside, I don’t think its a big deal to have to call add_derivatives if you want more control as to how derivatives are added (whereas derivatives= is really just a “short cut” for a default configuration for derivatives).