Feature request: global variables whose values are hard coded + skip_unreachable_node understanding that

[rbalicki2]

• At Pinterest, we have performance issues for queries with large ASTs. This relates to our backend, and isn't a Relay problem.
• We have a global variable isAuth, and frequently do ...AuthFragment @include(if: $isAuth) or ...UnauthFragment @skip(if: $isAuth)
• This provides great DevEx, but also results in a query containing both AuthFragment and UnauthFragment. These queries end up timing out, and causing problems.
• We can work around this by having two queries: query MyAuthQuery { ...SomeRootFragment @arguments(isAuth: true) } and vice versa for unauth.
• This is doable, but it also means that we have to use @arguments and @argumentDefinitions everywhere for

So my feature request is that relay allows you to hard code certain query variables: query MyAuthQuery($isAuth: Boolean! @hardCodedTo(value: true)) or MyAuthQuery($isAuth = true) (though this gets away from GraphQL syntax), and have the skip_unreachable_node transform drop the relevant fragments from the normalization AST.

Cheers!

[rbalicki2]

To add to this, it's actually a bit worse than I mentioned, because we have both $isAuth and $isDesktop variables, so we will have 4x the queries :)