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node_modules/webpack/lib/javascript/ChunkFormatHelpers.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Natsu @xiaoxiaojx
+*/
+
+"use strict";
+
+const { updateHashForEntryStartup } = require("./StartupHelpers");
+
+/** @typedef {import("../ChunkGraph")} ChunkGraph */
+/** @typedef {import("../Module")} Module */
+/** @typedef {import("../Chunk")} Chunk */
+/** @typedef {import("../Entrypoint")} Entrypoint */
+/** @typedef {import("../util/Hash")} Hash */
+/** @typedef {import("../Compilation").ChunkHashContext} ChunkHashContext */
+
+/**
+ * Gets information about a chunk including its entries and runtime chunk
+ * @param {Chunk} chunk The chunk to get information for
+ * @param {ChunkGraph} chunkGraph The chunk graph containing the chunk
+ * @returns {{ entries: [Module, Entrypoint | undefined][], runtimeChunk: Chunk | null }} Object containing chunk entries and runtime chunk
+ */
+function getChunkInfo(chunk, chunkGraph) {
+	const entries = [
+		...chunkGraph.getChunkEntryModulesWithChunkGroupIterable(chunk)
+	];
+	const runtimeChunk =
+		entries.length > 0
+			? /** @type {Entrypoint[][]} */
+				(entries)[0][1].getRuntimeChunk()
+			: null;
+
+	return {
+		entries,
+		runtimeChunk
+	};
+}
+
+/**
+ * Creates a chunk hash handler
+ * @param {string} name The name of the chunk
+ * @returns {(chunk: Chunk, hash: Hash, { chunkGraph }: ChunkHashContext) => void} The chunk hash handler
+ */
+function createChunkHashHandler(name) {
+	/**
+	 * @param {Chunk} chunk The chunk to get information for
+	 * @param {Hash} hash The hash to update
+	 * @param {ChunkHashContext} chunkHashContext The chunk hash context
+	 * @returns {void}
+	 */
+	return (chunk, hash, { chunkGraph }) => {
+		if (chunk.hasRuntime()) return;
+		const { entries, runtimeChunk } = getChunkInfo(chunk, chunkGraph);
+		hash.update(name);
+		hash.update("1");
+		if (runtimeChunk && runtimeChunk.hash) {
+			// https://github.com/webpack/webpack/issues/19439
+			// Any change to runtimeChunk should trigger a hash update,
+			// we shouldn't depend on or inspect its internal implementation.
+			// import __webpack_require__ from "./runtime-main.e9400aee33633a3973bd.js";
+			hash.update(runtimeChunk.hash);
+		}
+		updateHashForEntryStartup(hash, chunkGraph, entries, chunk);
+	};
+}
+
+module.exports = {
+	createChunkHashHandler,
+	getChunkInfo
+};