graphql-code-generator | generating code based on a GraphQL schema | GraphQL library

A custom scalar type named Date which is an ISO 8601 string is defined in the backend.

In the frontend "GraphQL Code Generator" (https://www.graphql-code-generator.com/) is used to generate typescript types from the schema.

The codegen.yml looks like this:

I am struggling to understand how to use Apollo Rover in conjunction with Apollo Codegen to generate my typescript types for my API's schema. I registered my schema in apollo studio, and can grab the schema into a GQL file, but it looks like codegen is not supported in the Rover CLI and so I need to use the legacy Apollo CLI. However the Apollo CLI wants schema to be fetched from a remote endpoint and not a registered schema, and wants the schema in JSON format, but Rover only fetches in .gql format.

I'm confused about how I am "supposed" to hook this up so that I can use apollo codegen with my registered schema without a bunch of manual conversion work.

GraphQL Code Generator creates this type on the top of the created TypeScript file:

So far I understand I need to build my own baseQuery. I could write graphql queries and mutations like in example here https://rtk-query-docs.netlify.app/examples/react-with-graphql, will I get full type safety for queries and mutations if I add types to query.builder like this builder.query or I must use something like this https://www.graphql-code-generator.com/docs/plugins/typescript-graphql-request#simple-request-middleware. In latter case how should my baseQuery look if I use generated hook for graphql-request library.

Here is example of hook from 2:

I have a Gatsby page component and try to query some data from GraphCMS. I added the page component inside a folder:

I've got a bunch of generated types (via GraphQL codegen) that look like this:

I have my AppSync api set up using aws-cdk and am not using their amplify framework. I am trying to figure out how / if I can generate Typescript definitions from my AppSync schema.graphql file while not using amplify, i.e. no access to amplify codegen command. I did try installing and running it, but I assume amplify expects files to be located in certain directories, hence failing.

I looked into https://graphql-code-generator.com but it wont work due to special types AppSync uses like AWSDateTime, a work around for this is to have api published and get schema from a graphql endpoint, but this is not ideal i.e. I'd like to be able and generate these types locally without publishing the schema.

Is this doable?

We have a graphql query that is executed like this:

I am wondering if arrays defined in graphql queries/mutations, which can be either singletons or tuples in valid graphql implementation get converted to strict array types by graphql-codegen. Is this is by design ?

Given this schema: