/// <reference types="node" />
import { IExecutable, Quality } from './index';
import { promises as fsPromises } from 'fs';
/**
 * Returns whether the user can access the given file path.
 */
export declare function canAccess({ access }: typeof fsPromises, file: string | undefined | null): Promise<boolean>;
/**
 * Escape regex special characters from the string.
 */
export declare function escapeRegexSpecialChars(str: string, except?: string): string;
/**
 * Gets the configured Chrome path, if any.
 */
export declare function preferredChromePath(fs: typeof fsPromises, env: NodeJS.ProcessEnv): Promise<string | undefined>;
/**
 * Gets the configured Firefox path, if any.
 */
export declare function preferredFirefoxPath(fs: typeof fsPromises, env: NodeJS.ProcessEnv): Promise<string | undefined>;
/**
 * Gets the configured Edge path, if any.
 */
export declare function preferredEdgePath(fs: typeof fsPromises, env: NodeJS.ProcessEnv): Promise<string | undefined>;
export interface IPriority {
    regex: RegExp;
    weight: number;
    quality: Quality;
}
/**
 * Sorts the set of installations,
 */
export declare function sort(installations: Iterable<string>, priorities: IPriority[]): IExecutable[];
/**
 * Finds binaries for Windows platforms by looking for the given path
 * suffixes in each of the local app data and program files directories
 * on the machine, returning complete absolute paths that match.
 */
export declare function findWindowsCandidates(env: NodeJS.ProcessEnv, fs: typeof fsPromises, suffixes: {
    name: string;
    type: Quality;
}[]): Promise<IExecutable[]>;