@theguild/federation-composition/esm/graphql/contains-supergraph-spec.js

Open Source Composition library for Apollo Federation

import { federationDirectives, federationEnums, federationScalars } from "./transform-supergraph-to-public-schema.js";
const supergraphSpecDetectionRegex = new RegExp(Array.from(federationScalars)
    .concat(Array.from(federationEnums))
    .map(name => [`\\[${name}`, `\\s${name}`])
    .flat(2)
    .concat(Array.from(federationDirectives).map(name => `@${name}`))
    .join('|'));
export function containsSupergraphSpec(sdl) {
    return supergraphSpecDetectionRegex.test(sdl);
}