import {NormalizedEnvironment, SchemaPointer, Endpoint} from './config';
import * as probot from 'probot';
import {Source} from 'graphql';
declare type FileLoaderConfig = {
  context: probot.Context;
  owner: string;
  repo: string;
};
interface FileLoaderInput {
  path: string;
  ref: string;
  alias: string;
  throwNotFound?: boolean;
  onError?: (error: any) => void;
}
export declare type FileLoader = (
  input: FileLoaderInput,
) => Promise<string | null>;
export declare 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 {};