1  /* (c) 2015 Ari Porad (@ariporad) <http://ariporad.com>. License: ariporad.mit-license.org */
 2  
 3  declare type Hook = (code: string, filename: string) => string;
 4  declare type Matcher = (code: string) => boolean;
 5  declare type RevertFunction = () => void;
 6  interface Options {
 7    /** A matcher function, will be called with path to a file. Should return truthy if the file should be hooked, falsy otherwise. */
 8    matcher?: Matcher;
 9    /**
10     * The extensions to hook. Should start with '.' (ex. ['.js']).
11     *
12     * @default ['.js']
13     */
14    exts?: Array<string>;
15    /**
16     * Auto-ignore node_modules. Independent of any matcher.
17     *
18     * @default true
19     */
20    ignoreNodeModules?: boolean;
21  }
22  /**
23   * Add a require hook.
24   *
25   * @param {Hook} hook - The hook. Accepts the code of the module and the filename. Required.
26   * @param {Options} [opts] - Options
27   * @returns {RevertFunction} revert - Reverts the hooks.
28   */
29  export declare function addHook(hook: Hook, opts?: Options): RevertFunction;
30  export {};