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node_modules/webpack/lib/LibManifestPlugin.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const asyncLib = require("neo-async");
+const EntryDependency = require("./dependencies/EntryDependency");
+const { someInIterable } = require("./util/IterableHelpers");
+const { compareModulesById } = require("./util/comparators");
+const { dirname, mkdirp } = require("./util/fs");
+
+/** @typedef {import("./Compiler")} Compiler */
+
+/**
+ * @typedef {Object} ManifestModuleData
+ * @property {string | number} id
+ * @property {Object} buildMeta
+ * @property {boolean | string[]} exports
+ */
+
+class LibManifestPlugin {
+	constructor(options) {
+		this.options = options;
+	}
+
+	/**
+	 * Apply the plugin
+	 * @param {Compiler} compiler the compiler instance
+	 * @returns {void}
+	 */
+	apply(compiler) {
+		compiler.hooks.emit.tapAsync(
+			"LibManifestPlugin",
+			(compilation, callback) => {
+				const moduleGraph = compilation.moduleGraph;
+				asyncLib.forEach(
+					Array.from(compilation.chunks),
+					(chunk, callback) => {
+						if (!chunk.canBeInitial()) {
+							callback();
+							return;
+						}
+						const chunkGraph = compilation.chunkGraph;
+						const targetPath = compilation.getPath(this.options.path, {
+							chunk
+						});
+						const name =
+							this.options.name &&
+							compilation.getPath(this.options.name, {
+								chunk
+							});
+						const content = Object.create(null);
+						for (const module of chunkGraph.getOrderedChunkModulesIterable(
+							chunk,
+							compareModulesById(chunkGraph)
+						)) {
+							if (
+								this.options.entryOnly &&
+								!someInIterable(
+									moduleGraph.getIncomingConnections(module),
+									c => c.dependency instanceof EntryDependency
+								)
+							) {
+								continue;
+							}
+							const ident = module.libIdent({
+								context: this.options.context || compiler.options.context,
+								associatedObjectForCache: compiler.root
+							});
+							if (ident) {
+								const exportsInfo = moduleGraph.getExportsInfo(module);
+								const providedExports = exportsInfo.getProvidedExports();
+								/** @type {ManifestModuleData} */
+								const data = {
+									id: chunkGraph.getModuleId(module),
+									buildMeta: module.buildMeta,
+									exports: Array.isArray(providedExports)
+										? providedExports
+										: undefined
+								};
+								content[ident] = data;
+							}
+						}
+						const manifest = {
+							name,
+							type: this.options.type,
+							content
+						};
+						// Apply formatting to content if format flag is true;
+						const manifestContent = this.options.format
+							? JSON.stringify(manifest, null, 2)
+							: JSON.stringify(manifest);
+						const buffer = Buffer.from(manifestContent, "utf8");
+						mkdirp(
+							compiler.intermediateFileSystem,
+							dirname(compiler.intermediateFileSystem, targetPath),
+							err => {
+								if (err) return callback(err);
+								compiler.intermediateFileSystem.writeFile(
+									targetPath,
+									buffer,
+									callback
+								);
+							}
+						);
+					},
+					callback
+				);
+			}
+		);
+	}
+}
+module.exports = LibManifestPlugin;