Cache issues

[Gregoirevda]

Reproduction:

• yarn send-introspection-query api-url-X
• write queries -> passes
• yarn send-introspection-query api-url-Y (doesn't contains queries or mutations of API X)
• yarn start -> still working
• bsb -clean-world -> still working
• changing the query -> recognise the different graphql_schema.json

In general, you see that the graphql_schema.json is cached in the ppx. Only a query change will trigger the new schema

[mhallin]

Yes, this is an unfortunate side-effect when a PPX depends on other files than the input source file itself. Changing graphql_schema.json requires a bsb -clean-world -make-world to fully take effect. I'll add this to the readme.

This is similar to #13.

[Gregoirevda]

Does it mean the ppx isn't executed if only another piece of code is changed?

[mhallin]

That's correct. A ppx is executed when the compiler compiles a file, which only happens when either that file or any of its dependencies - i.e. other .ml/.re files - have changed.

This basically means that ppx's never should read other files than their input. What you're seeing here is what happens when you break that rule :)