import type { DocumentNode, GraphQLSchema } from 'graphql';
import type { ComposeSubgraphsOptions } from '@graphql-mesh/fusion-composition';
import type { Logger, MeshFetch } from '@graphql-mesh/types';
import type { MaybePromise } from '@graphql-tools/utils';
export interface MeshComposeCLIConfig extends ComposeSubgraphsOptions {
    /**
     * The output destination of the resulting composed GraphQL schema.
     * By default, the CLI will write the result to stdout.
     */
    output?: string;
    subgraphs: MeshComposeCLISubgraphConfig[];
    /**
     * TODO: Implement root level transforms later
    transforms?: MeshComposeCLITransformConfig[];
     */
    additionalTypeDefs?: string | DocumentNode | (string | DocumentNode)[];
    subgraph?: string;
    fetch?: MeshFetch;
    cwd?: string;
}
export interface MeshComposeCLISubgraphConfig {
    sourceHandler: MeshComposeCLISourceHandlerDef;
    transforms?: MeshComposeCLITransformConfig[];
}
export type MeshComposeCLISourceHandlerDef = (ctx: LoaderContext) => {
    name: string;
    schema$: MaybePromise<GraphQLSchema>;
};
export type MeshComposeCLITransformConfig = (input: GraphQLSchema, ...args: any[]) => GraphQLSchema;
export interface LoaderContext {
    fetch: MeshFetch;
    cwd: string;
    logger: Logger;
}
/**
 * Type helper for defining the config.
 */
export declare function defineConfig(config: MeshComposeCLIConfig): MeshComposeCLIConfig;