webpack/lib/javascript/ArrayPushCallbackChunkFormatPlugin.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 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.exports);
							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.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()
											? `${RuntimeGlobals.require} =>`
											: `function(${RuntimeGlobals.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 ${RuntimeGlobals.exports};\n`);
									}
								}
								runtime.add("}\n");
								source.add(",\n");
								source.add(new PrefixSource("/******/ ", runtime));
							}
							source.add("])");
						}
						return source;
					}
				);
				hooks.chunkHash.tap(
					"ArrayPushCallbackChunkFormatPlugin",
					(chunk, hash, { chunkGraph, runtimeTemplate }) => {
						if (chunk.hasRuntime()) return;
						hash.update(
							`ArrayPushCallbackChunkFormatPlugin1${runtimeTemplate.outputOptions.chunkLoadingGlobal}${runtimeTemplate.outputOptions.hotUpdateGlobal}${runtimeTemplate.globalObject}`
						);
						const entries = Array.from(
							chunkGraph.getChunkEntryModulesWithChunkGroupIterable(chunk)
						);
						updateHashForEntryStartup(hash, chunkGraph, entries, chunk);
					}
				);
			}
		);
	}
}

module.exports = ArrayPushCallbackChunkFormatPlugin;