@nestjs/graphql/dist/federation/graphql-federation-definitions.factory.js

Nest - modern, fast, powerful node.js web framework (@graphql)

import { mergeTypeDefs } from '@graphql-tools/merge';
import { loadPackage } from '@nestjs/common/utils/load-package.util.js';
import { gql } from 'graphql-tag';
import { GraphQLDefinitionsFactory } from '../graphql-definitions.factory.js';
import { extend } from '../utils/index.js';
/**
 * @publicApi
 */
export class GraphQLFederationDefinitionsFactory extends GraphQLDefinitionsFactory {
    async exploreAndEmit(typePaths, path, outputAs, isDebugEnabled, definitionsGeneratorOptions, typeDefs) {
        const typePathDefs = await this.gqlTypesLoader.mergeTypesByPaths(typePaths);
        const mergedTypeDefs = extend(typePathDefs, typeDefs);
        const { buildSubgraphSchema, printSubgraphSchema, } = await loadPackage('@apollo/subgraph', 'ApolloFederation', () => import('@apollo/subgraph'));
        const schema = buildSubgraphSchema([
            {
                typeDefs: gql `
          ${mergedTypeDefs}
        `,
                resolvers: {},
            },
        ]);
        // "buildSubgraphSchema" generates an empty Query definition if there is the `extend type Query` statement
        // This leads to duplicated IQuery interfaces
        // see: https://github.com//issues/2344
        const mergedDefinition = mergeTypeDefs([printSubgraphSchema(schema)], {
            useSchemaDefinition: false,
            throwOnConflict: true,
            commentDescriptions: true,
            reverseDirectives: true,
        });
        const tsFile = await this.gqlAstExplorer.explore(gql `
        ${mergedDefinition}
      `, path, outputAs, definitionsGeneratorOptions);
        await tsFile.save();
        this.printMessage(`[${new Date().toLocaleTimeString()}] The definitions have been updated.`, isDebugEnabled);
    }
}