Expose makeVariables and makeMutation

[jfrolich]

It would be great to have a bit more API surface to make a nicer API for consuming libraries. Sometimes you'd want to set up a mutation, and provide the variables dynamically. For instance with react-apollo a hook that returns a function that accepts variables. Because the make functions needs the variables, we cannot get back the data structure that includes the mutation itself and the parse function.
A workaround for now is to

• pass the whole make function at the last moment and initially create an empty mutation in the hook.
• Pass the query attribute and parse method to the hook and the variables attribute of make later.

Both not great options. I would propose a makeVariables function to make the variables data structure, and a makeMutation (better naming ideas?) that does the same thing as make but returns the data structure without variables. Any thoughts?

Happy to try to set up a PR for this, but interested in feedback on this first.

[jfrolich]

Related discussion in reason-apollo-hooks: reasonml-community/reason-apollo-hooks#59

[baransu]

I think there is only a need to expose makeVariables function. make result is just a reexport or query and parse with created variables. You have access to query and parse all the time.

I think it should be fairly easy to implement. I'm open to PR 🙂 Let men know if you need some help.

[baransu]

Released in 0.3.5