Use embedded templates in root file generation

[barr-code]

What happened?

When a binary is shipped with gqlgen as one of its dependencies, with the follow-schema option set in the config, the following error is encountered:

open <your file structure path>/github.com/99designs/[email protected]/codegen/root_.gotpl: no such file or directory

What did you expect?

The fix for issue 2260 offers the ability to pass in a TemplateFS option. However, that option is not being honored by the generateRootFile function. I would expect the same logic that was implemented here to apply in generateRootFile.

versions

• go run github.com/99designs/gqlgen version?
  v0.17.42

• go version?
  go 1.22.4

[clayne11]

That makes sense, feel free to PR.