webpack/lib/javascript/ArrayPushCallbackChunkFormatPlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support 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 Tobias Koppers @sokra
*/

"use strict";

const { ConcatSource, PrefixSource, RawSource } = require("webpack-sources");
const { RuntimeGlobals } = require("..");
const HotUpdateChunk = require("../HotUpdateChunk");
const Template = require("../Template");
const { getCompilationHooks } = require("./JavascriptModulesPlugin");
const {
	generateEntryStartup,
	updateHashForEntryStartup
} = require("./StartupHelpers");

/** @typedef {import("../Compiler")} Compiler */

class ArrayPushCallbackChunkFormatPlugin {
	/**
	 * Apply the plugin
	 * @param {Compiler} compiler the compiler instance
	 * @returns {void}
	 */
	apply(compiler) {
		compiler.hooks.thisCompilation.tap(
			"ArrayPushCallbackChunkFormatPlugin",
			compilation => {
				compilation.hooks.additionalChunkRuntimeRequirements.tap(
					"ArrayPushCallbackChunkFormatPlugin",
					(chunk, set, { chunkGraph }) => {
						if (chunk.hasRuntime()) return;
						if (chunkGraph.getNumberOfEntryModules(chunk) > 0) {
							set.add(RuntimeGlobals.onChunksLoaded);
							set.add(RuntimeGlobals.require);
						}
						set.add(RuntimeGlobals.chunkCallback);
					}
				);
				const hooks = getCompilationHooks(compilation);
				hooks.renderChunk.tap(
					"ArrayPushCallbackChunkFormatPlugin",
					(modules, renderContext) => {
						const { chunk, chunkGraph, runtimeTemplate } = renderContext;
						const hotUpdateChunk =
							chunk instanceof HotUpdateChunk ? chunk : null;
						const globalObject = runtimeTemplate.outputOptions.globalObject;
						const source = new ConcatSource();
						const runtimeModules =
							chunkGraph.getChunkRuntimeModulesInOrder(chunk);
						if (hotUpdateChunk) {
							const hotUpdateGlobal =
								runtimeTemplate.outputOptions.hotUpdateGlobal;
							source.add(
								`${globalObject}[${JSON.stringify(hotUpdateGlobal)}](`
							);
							source.add(`${JSON.stringify(chunk.id)},`);
							source.add(modules);
							if (runtimeModules.length > 0) {
								source.add(",\n");
								const runtimePart = Template.renderChunkRuntimeModules(
									runtimeModules,
									renderContext
								);
								source.add(runtimePart);
							}
							source.add(")");
						} else {
							const chunkLoadingGlobal =
								runtimeTemplate.outputOptions.chunkLoadingGlobal;
							source.add(
								`(${globalObject}[${JSON.stringify(
									chunkLoadingGlobal
								)}] = ${globalObject}[${JSON.stringify(
									chunkLoadingGlobal
								)}] || []).push([`
							);
							source.add(`${JSON.stringify(chunk.ids)},`);
							source.add(modules);
							const entries = Array.from(
								chunkGraph.getChunkEntryModulesWithChunkGroupIterable(chunk)
							);
							if (runtimeModules.length > 0 || entries.length > 0) {
								const runtime = new ConcatSource(
									(runtimeTemplate.supportsArrowFunction()
										? "__webpack_require__ =>"
										: "function(__webpack_require__)") +
										" { // webpackRuntimeModules\n"
								);
								if (runtimeModules.length > 0) {
									runtime.add(
										Template.renderRuntimeModules(runtimeModules, {
											...renderContext,
											codeGenerationResults: compilation.codeGenerationResults
										})
									);
								}
								if (entries.length > 0) {
									const startupSource = new RawSource(
										generateEntryStartup(
											chunkGraph,
											runtimeTemplate,
											entries,
											chunk,
											true
										)
									);
									runtime.add(
										hooks.renderStartup.call(
											startupSource,
											entries[entries.length - 1][0],
											{
												...renderContext,
												inlined: false
											}
										)
									);
									if (
										chunkGraph
											.getChunkRuntimeRequirements(chunk)
											.has(RuntimeGlobals.returnExportsFromRuntime)
									) {
										runtime.add("return __webpack_exports__;\n");
									}
								}
								runtime.add("}\n");
								source.add(",\n");
								source.add(new PrefixSource("/******/ ", runtime));
							}
							source.add("])");
						}
						return source;
					}
				);
				hooks.chunkHash.tap(
					"ArrayPushCallbackChunkFormatPlugin",
					(chunk, hash, { chunkGraph, runtimeTemplate }) => {
						if (chunk.hasRuntime()) return;
						hash.update(
							`ArrayPushCallbackChunkFormatPlugin1${runtimeTemplate.outputOptions.chunkLoadingGlobal}${runtimeTemplate.outputOptions.hotUpdateGlobal}${runtimeTemplate.outputOptions.globalObject}`
						);
						const entries = Array.from(
							chunkGraph.getChunkEntryModulesWithChunkGroupIterable(chunk)
						);
						updateHashForEntryStartup(hash, chunkGraph, entries, chunk);
					}
				);
			}
		);
	}
}

module.exports = ArrayPushCallbackChunkFormatPlugin;