cannot load a supergraph composed by rover

[Geal]

If I try to compose the following subgraphs(obtained with rover subgraph introspect):

speakers.graphql:

schema
  @link(url: "https://specs.apollo.dev/link/v1.0")
{
  query: Query
}

extend schema
  @link(url: "https://specs.apollo.dev/federation/v2.0", import: ["@key", "@shareable"])

directive @link(url: String, as: String, for: link__Purpose, import: [link__Import]) repeatable on SCHEMA

directive @key(fields: federation__FieldSet!, resolvable: Boolean = true) repeatable on OBJECT | INTERFACE

directive @federation__requires(fields: federation__FieldSet!) on FIELD_DEFINITION

directive @federation__provides(fields: federation__FieldSet!) on FIELD_DEFINITION

directive @federation__external(reason: String) on OBJECT | FIELD_DEFINITION

directive @federation__tag(name: String!) repeatable on FIELD_DEFINITION | OBJECT | INTERFACE | UNION | ARGUMENT_DEFINITION | SCALAR | ENUM | ENUM_VALUE | INPUT_OBJECT | INPUT_FIELD_DEFINITION

directive @federation__extends on OBJECT | INTERFACE

directive @shareable on OBJECT | FIELD_DEFINITION

directive @federation__inaccessible on FIELD_DEFINITION | OBJECT | INTERFACE | UNION | ARGUMENT_DEFINITION | SCALAR | ENUM | ENUM_VALUE | INPUT_OBJECT | INPUT_FIELD_DEFINITION

directive @federation__override(from: String!) on FIELD_DEFINITION

type Speaker
  @key(fields: "link")
{
  uuid: ID!
  firstName: String
  lastName: String
  link: String
}

type Query {
  speakers: [Speaker]
  speaker(id: ID!): Speaker
  _entities(representations: [_Any!]!): [_Entity]!
  _service: _Service!
}

enum link__Purpose {
  """
  `SECURITY` features provide metadata necessary to securely resolve fields.
  """
  SECURITY

  """
  `EXECUTION` features provide metadata necessary for operation execution.
  """
  EXECUTION
}

scalar link__Import

scalar federation__FieldSet

scalar _Any

type _Service {
  sdl: String
}

union _Entity = Speaker

schedule.graphql

schema
  @link(url: "https://specs.apollo.dev/link/v1.0")
{
  query: Query
}

extend schema
  @link(url: "https://specs.apollo.dev/federation/v2.0", import: ["@key", "@shareable", "@external"])

directive @link(url: String, as: String, for: link__Purpose, import: [link__Import]) repeatable on SCHEMA

directive @key(fields: federation__FieldSet!, resolvable: Boolean = true) repeatable on OBJECT | INTERFACE

directive @federation__requires(fields: federation__FieldSet!) on FIELD_DEFINITION

directive @federation__provides(fields: federation__FieldSet!) on FIELD_DEFINITION

directive @external(reason: String) on OBJECT | FIELD_DEFINITION

directive @federation__tag(name: String!) repeatable on FIELD_DEFINITION | OBJECT | INTERFACE | UNION | ARGUMENT_DEFINITION | SCALAR | ENUM | ENUM_VALUE | INPUT_OBJECT | INPUT_FIELD_DEFINITION

directive @federation__extends on OBJECT | INTERFACE

directive @shareable on OBJECT | FIELD_DEFINITION

directive @federation__inaccessible on FIELD_DEFINITION | OBJECT | INTERFACE | UNION | ARGUMENT_DEFINITION | SCALAR | ENUM | ENUM_VALUE | INPUT_OBJECT | INPUT_FIELD_DEFINITION

directive @federation__override(from: String!) on FIELD_DEFINITION

type Room {
  id: ID!
  name: String
  capacity: Int
}

type Slot {
  roomId: ID!
  slotId: ID!
  talk: Talk
}

type Talk {
  trackId: String
  talkType: String
  talkId: ID!
  title: String
  speakers: [Speaker]
}

extend type Speaker
  @key(fields: "link")
{
  link: String @external
}

type Query {
  rooms: [Room]
  room(id: ID!): Room
  slots: [Slot]
  _entities(representations: [_Any!]!): [_Entity]!
  _service: _Service!
}

enum link__Purpose {
  """
  `SECURITY` features provide metadata necessary to securely resolve fields.
  """
  SECURITY

  """
  `EXECUTION` features provide metadata necessary for operation execution.
  """
  EXECUTION
}

scalar link__Import

scalar federation__FieldSet

scalar _Any

type _Service {
  sdl: String
}

union _Entity = Speaker

supergraph.yml:

subgraphs:
  speakers:
    routing_url: https://localhost:4001/
    schema:
      file: ./speakers.graphql
  schedule:
    routing_url: https://localhost:4002/
    schema:
      file: ./schedule.graphql

I will get the supergraph schema:

schema
  @core(feature: "https://specs.apollo.dev/core/v0.2"),
  @core(feature: "https://specs.apollo.dev/join/v0.1", for: EXECUTION)
{
  query: Query
}

directive @core(as: String, feature: String!, for: core__Purpose) repeatable on SCHEMA

directive @join__field(graph: join__Graph, provides: join__FieldSet, requires: join__FieldSet) on FIELD_DEFINITION

directive @join__graph(name: String!, url: String!) on ENUM_VALUE

directive @join__owner(graph: join__Graph!) on INTERFACE | OBJECT

directive @join__type(graph: join__Graph!, key: join__FieldSet) repeatable on INTERFACE | OBJECT

type Query {
  room(id: ID!): Room @join__field(graph: SCHEDULE)
  rooms: [Room] @join__field(graph: SCHEDULE)
  slots: [Slot] @join__field(graph: SCHEDULE)
  speaker(id: ID!): Speaker @join__field(graph: SPEAKERS)
  speakers: [Speaker] @join__field(graph: SPEAKERS)
}

type Room {
  capacity: Int
  id: ID!
  name: String
}

type Slot {
  roomId: ID!
  slotId: ID!
  talk: Talk
}

type Speaker
  @join__owner(graph: SPEAKERS)
  @join__type(graph: SPEAKERS, key: "link")
  @join__type(graph: SCHEDULE, key: "link")
{
  firstName: String @join__field(graph: SPEAKERS)
  lastName: String @join__field(graph: SPEAKERS)
  link: String @join__field(graph: SPEAKERS)
  uuid: ID! @join__field(graph: SPEAKERS)
}

type Talk {
  speakers: [Speaker]
  talkId: ID!
  talkType: String
  title: String
  trackId: String
}

enum core__Purpose {
  """
  `EXECUTION` features provide metadata necessary to for operation execution.
  """
  EXECUTION

  """
  `SECURITY` features provide metadata necessary to securely resolve fields.
  """
  SECURITY
}

scalar federation__FieldSet

scalar join__FieldSet

enum join__Graph {
  SCHEDULE @join__graph(name: "schedule" url: "https://localhost:4002/")
  SPEAKERS @join__graph(name: "speakers" url: "https://localhost:4001/")
}

scalar link__Import

enum link__Purpose {
  """
  `EXECUTION` features provide metadata necessary for operation execution.
  """
  EXECUTION

  """
  `SECURITY` features provide metadata necessary to securely resolve fields.
  """
  SECURITY
}

The router will fail to load this schema, with this error:

$ ./router -s supergraph.graphql -c router.config.yml --hot-reload
2022-04-12T12:57:22.276818Z  INFO apollo_router::executable: [email protected]
2022-04-12T12:57:22.322167Z  INFO apollo_router: starting Apollo Router
2022-04-12T12:57:22.413046Z ERROR apollo_router::state_machine: cannot create the router: couldn't build Router Service: query planning had errors: bridge errors: UNKNOWN: Type federation__FieldSet already exists in this schema
2022-04-12T12:57:22.413326Z  INFO apollo_router: stopped with error
2022-04-12T12:57:22.413389Z ERROR apollo_router::executable: could not create the HTTP pipeline: couldn't build Router Service: query planning had errors: bridge errors: UNKNOWN: Type federation__FieldSet already exists in this schema
could not create the HTTP pipeline: couldn't build Router Service: query planning had errors: bridge errors: UNKNOWN: Type federation__FieldSet already exists in this schema

If I remove the following definitions from the schema, it will load properly:

scalar federation__FieldSet

scalar link__Import

enum link__Purpose {
  """
  `EXECUTION` features provide metadata necessary for operation execution.
  """
  EXECUTION

  """
  `SECURITY` features provide metadata necessary to securely resolve fields.
  """
  SECURITY
}

[Geal]

I have not tested yet if this affects the gateway too

[Geal]

I'm using rover 0.5.1 and the router 0.1.0-preview4

[Geal]

closing this as it is handled in apollographql/rover#1089 and apollographql/rover#1090