webpack/lib/util/hash/DebugHash.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Alexander Akait @alexander-akait
*/

"use strict";

const Hash = require("../Hash");

/** @typedef {import("../../../declarations/WebpackOptions").HashDigest} Encoding */

/* istanbul ignore next */
class DebugHash extends Hash {
	constructor() {
		super();
		this.string = "";
	}

	/**
	 * Update hash {@link https://nodejs.org/api/crypto.html#crypto_hash_update_data_inputencoding}
	 * @overload
	 * @param {string | Buffer} data data
	 * @returns {Hash} updated hash
	 */
	/**
	 * Update hash {@link https://nodejs.org/api/crypto.html#crypto_hash_update_data_inputencoding}
	 * @overload
	 * @param {string} data data
	 * @param {Encoding} inputEncoding data encoding
	 * @returns {Hash} updated hash
	 */
	/**
	 * Update hash {@link https://nodejs.org/api/crypto.html#crypto_hash_update_data_inputencoding}
	 * @param {string | Buffer} data data
	 * @param {Encoding=} inputEncoding data encoding
	 * @returns {Hash} updated hash
	 */
	update(data, inputEncoding) {
		if (typeof data !== "string") data = data.toString("utf8");
		const prefix = Buffer.from("@webpack-debug-digest@").toString("hex");
		if (data.startsWith(prefix)) {
			data = Buffer.from(data.slice(prefix.length), "hex").toString();
		}
		this.string += `[${data}](${
			/** @type {string} */
			(
				// eslint-disable-next-line unicorn/error-message
				new Error().stack
			).split("\n", 3)[2]
		})\n`;
		return this;
	}

	/**
	 * Calculates the digest {@link https://nodejs.org/api/crypto.html#crypto_hash_digest_encoding}
	 * @overload
	 * @returns {Buffer} digest
	 */
	/**
	 * Calculates the digest {@link https://nodejs.org/api/crypto.html#crypto_hash_digest_encoding}
	 * @overload
	 * @param {Encoding} encoding encoding of the return value
	 * @returns {string} digest
	 */
	/**
	 * Calculates the digest {@link https://nodejs.org/api/crypto.html#crypto_hash_digest_encoding}
	 * @param {Encoding=} encoding encoding of the return value
	 * @returns {string | Buffer} digest
	 */
	digest(encoding) {
		return Buffer.from(`@webpack-debug-digest@${this.string}`).toString("hex");
	}
}

module.exports = DebugHash;