import { Source } from 'graphql';
import * as probot from 'probot';
import { Endpoint, NormalizedEnvironment, SchemaPointer } from './config.cjs';
type FileLoaderConfig = {
    context: probot.Context;
    owner: string;
    repo: string;
    action: string;
    release: string;
};
interface FileLoaderInput {
    path: string;
    ref: string;
    alias: string;
    throwNotFound?: boolean;
    onError?: (error: any) => void;
}
export type FileLoader = (input: FileLoaderInput) => Promise<string | null>;
export type ConfigLoader = () => Promise<object | null | undefined>;
export declare function createFileLoader(config: FileLoaderConfig): FileLoader;
export declare function createConfigLoader(config: FileLoaderConfig & {
    ref: string;
}, loadFile: FileLoader): ConfigLoader;
export declare function printSchemaFromEndpoint(endpoint: Endpoint): Promise<string>;
export declare function loadSources({ config, oldPointer, newPointer, loadFile, }: {
    config: NormalizedEnvironment;
    oldPointer: SchemaPointer;
    newPointer: SchemaPointer;
    loadFile: FileLoader;
}): Promise<{
    old: Source;
    new: Source;
}>;
export {};