@theguild/federation-composition/esm/graphql/helpers.js

Open Source Composition library for Apollo Federation

import { Kind, visit } from 'graphql';
export function isDirectiveDefinition(node) {
    return node.kind === Kind.DIRECTIVE_DEFINITION;
}
export function stripFederationFromSupergraph(supergraph) {
    function remove() {
        return null;
    }
    return visit(supergraph, {
        DirectiveDefinition: remove,
        Directive: remove,
        SchemaDefinition: remove,
        SchemaExtension: remove,
        EnumTypeDefinition: node => {
            if (node.name.value === 'core__Purpose' ||
                node.name.value === 'join__Graph' ||
                node.name.value === 'link__Purpose') {
                return null;
            }
            return node;
        },
        ScalarTypeDefinition: node => {
            if (node.name.value === '_FieldSet' ||
                node.name.value === 'link__Import' ||
                node.name.value === 'join__FieldSet') {
                return null;
            }
            return node;
        },
    });
}