/* (c) 2015 Ari Porad (@ariporad) <http://ariporad.com>. License: ariporad.mit-license.org */
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declare type Hook = (code: string, filename: string) => string;
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declare type Matcher = (code: string) => boolean;
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declare type RevertFunction = () => void;
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interface Options {
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/** A matcher function, will be called with path to a file. Should return truthy if the file should be hooked, falsy otherwise. */
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matcher?: Matcher;
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/**
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* The extensions to hook. Should start with '.' (ex. ['.js']).
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*
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* @default ['.js']
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*/
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exts?: Array<string>;
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/**
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* Auto-ignore node_modules. Independent of any matcher.
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*
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* @default true
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*/
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ignoreNodeModules?: boolean;
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}
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/**
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* Add a require hook.
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*
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* @param {Hook} hook - The hook. Accepts the code of the module and the filename. Required.
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* @param {Options} [opts] - Options
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* @returns {RevertFunction} revert - Reverts the hooks.
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*/
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export declare function addHook(hook: Hook, opts?: Options): RevertFunction;
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export {};
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