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1 files changed, 53 insertions, 0 deletions

diff --git a/node_modules/webpack/lib/ExportPropertyMainTemplatePlugin.js b/node_modules/webpack/lib/ExportPropertyMainTemplatePlugin.js
new file mode 100644
index 00000000..90df031a
--- /dev/null
+++ b/node_modules/webpack/lib/ExportPropertyMainTemplatePlugin.js
@@ -0,0 +1,53 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const { ConcatSource } = require("webpack-sources");
+
+/** @typedef {import("./Compilation")} Compilation */
+
+/**
+ * @param {string[]} accessor the accessor to convert to path
+ * @returns {string} the path
+ */
+const accessorToObjectAccess = accessor => {
+	return accessor.map(a => `[${JSON.stringify(a)}]`).join("");
+};
+
+class ExportPropertyMainTemplatePlugin {
+	/**
+	 * @param {string|string[]} property the name of the property to export
+	 */
+	constructor(property) {
+		this.property = property;
+	}
+
+	/**
+	 * @param {Compilation} compilation the compilation instance
+	 * @returns {void}
+	 */
+	apply(compilation) {
+		const { mainTemplate, chunkTemplate } = compilation;
+
+		const onRenderWithEntry = (source, chunk, hash) => {
+			const postfix = `${accessorToObjectAccess([].concat(this.property))}`;
+			return new ConcatSource(source, postfix);
+		};
+
+		for (const template of [mainTemplate, chunkTemplate]) {
+			template.hooks.renderWithEntry.tap(
+				"ExportPropertyMainTemplatePlugin",
+				onRenderWithEntry
+			);
+		}
+
+		mainTemplate.hooks.hash.tap("ExportPropertyMainTemplatePlugin", hash => {
+			hash.update("export property");
+			hash.update(`${this.property}`);
+		});
+	}
+}
+
+module.exports = ExportPropertyMainTemplatePlugin;