feat: Create tailcall config from a URL

[tusharmath]

Given an HTTP URL for a REST API, generate a valid tailcall configuration that can expose a GraphQL endpoint automatically.

CLI Usage

Option 1

tailcall gen https://jsonplaceholder.typicode.com/users --input URL --output GraphQL

Limitiations: Difficult to configure headers, post requests etc.

Option 2

curl -x https://jsonplaceholder.typicode.com/users | tailcall gen --input CURL --output GraphQL

Limitations: Difficult to enforce usage of -x on the previous curl command and dependency on a curl output parser.

Option 3
Using input type curl to specify all a URL to curl on with arguments to configure the curl command.

tailcall curl https://foo.com/bar\
  -H 'Authorization: Bearer 1234'\
  -d '{"a":"b", "c":"d"}'\
  -X POST\
  --output GraphQL

Generated Configuration

schema @upstream(baseURL: "http://jsonplaceholder.typicode.com") {
  query: Query
}

type Query {
  users: [User] @http(path: "/users")
}

type User {
  id: Int!
  name: String!
  username: String!
  email: String!
  phone: String
  website: String
  address: Address
}


type Address {
  street: String
  suite: String
  city: String
  zipcode: String
  geo: Geo 
}

type Geo {
  lat: String
  lng: String
}

Technical Requirements

• Add unit test wherever necessary
• Implement the logic in a separate workspace - tailcall-config-url