Filter files to parse based on file content

[diogolessa]

Hi there 👋🏻

I was wondering if it's possible to decide whether to parse a given file or not based on it's content. Idea is that, given the files:

./queries/queryA.gql
query A @DirectiveX {
  ...
}

./queries/queryB.gql
query B @DirectiveY {
  ...
}

We could be able to choose parsing only files of a given directive (say, only DirectiveX). I read the docs about creating custom document loader, pluckConfig and custom plugins. But it seems that:

• pluckConfig works for code files, not gql
• custom loaders receives docString as paremeter with the blob pattern instead of the file content, also I'm not sure if filtering files there would be possible (doc says it should return DocumentNode, not clear for me how it flows afterwards)
• It's not possible to filter out files from a plugin to pass to another one

I know there are some other possibilities to handle it but I just got curious about this approach.