1 files changed, 85 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/runtime/AutoPublicPathRuntimeModule.js b/node_modules/webpack/lib/runtime/AutoPublicPathRuntimeModule.js
new file mode 100644
index 00000000..74b40a1e
--- /dev/null
+++ b/node_modules/webpack/lib/runtime/AutoPublicPathRuntimeModule.js
@@ -0,0 +1,85 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+*/
+
+"use strict";
+
+const RuntimeGlobals = require("../RuntimeGlobals");
+const RuntimeModule = require("../RuntimeModule");
+const Template = require("../Template");
+const JavascriptModulesPlugin = require("../javascript/JavascriptModulesPlugin");
+const { getUndoPath } = require("../util/identifier");
+
+/** @typedef {import("../Chunk")} Chunk */
+/** @typedef {import("../Compilation")} Compilation */
+
+class AutoPublicPathRuntimeModule extends RuntimeModule {
+	constructor() {
+		super("publicPath", RuntimeModule.STAGE_BASIC);
+	}
+
+	/**
+	 * @returns {string | null} runtime code
+	 */
+	generate() {
+		const compilation = /** @type {Compilation} */ (this.compilation);
+		const { scriptType, importMetaName, path } = compilation.outputOptions;
+		const chunkName = compilation.getPath(
+			JavascriptModulesPlugin.getChunkFilenameTemplate(
+				/** @type {Chunk} */
+				(this.chunk),
+				compilation.outputOptions
+			),
+			{
+				chunk: this.chunk,
+				contentHashType: "javascript"
+			}
+		);
+		const undoPath = getUndoPath(
+			chunkName,
+			/** @type {string} */ (path),
+			false
+		);
+
+		return Template.asString([
+			"var scriptUrl;",
+			scriptType === "module"
+				? `if (typeof ${importMetaName}.url === "string") scriptUrl = ${importMetaName}.url`
+				: Template.asString([
+						`if (${RuntimeGlobals.global}.importScripts) scriptUrl = ${RuntimeGlobals.global}.location + "";`,
+						`var document = ${RuntimeGlobals.global}.document;`,
+						"if (!scriptUrl && document) {",
+						Template.indent([
+							// Technically we could use `document.currentScript instanceof window.HTMLScriptElement`,
+							// but an attacker could try to inject `<script>HTMLScriptElement = HTMLImageElement</script>`
+							// and use `<img name="currentScript" src="https://attacker.controlled.server/"></img>`
+							"if (document.currentScript && document.currentScript.tagName.toUpperCase() === 'SCRIPT')",
+							Template.indent("scriptUrl = document.currentScript.src;"),
+							"if (!scriptUrl) {",
+							Template.indent([
+								'var scripts = document.getElementsByTagName("script");',
+								"if(scripts.length) {",
+								Template.indent([
+									"var i = scripts.length - 1;",
+									"while (i > -1 && (!scriptUrl || !/^http(s?):/.test(scriptUrl))) scriptUrl = scripts[i--].src;"
+								]),
+								"}"
+							]),
+							"}"
+						]),
+						"}"
+					]),
+			"// When supporting browsers where an automatic publicPath is not supported you must specify an output.publicPath manually via configuration",
+			'// or pass an empty string ("") and set the __webpack_public_path__ variable from your code to use your own logic.',
+			'if (!scriptUrl) throw new Error("Automatic publicPath is not supported in this browser");',
+			'scriptUrl = scriptUrl.replace(/#.*$/, "").replace(/\\?.*$/, "").replace(/\\/[^\\/]+$/, "/");',
+			!undoPath
+				? `${RuntimeGlobals.publicPath} = scriptUrl;`
+				: `${RuntimeGlobals.publicPath} = scriptUrl + ${JSON.stringify(
+						undoPath
+					)};`
+		]);
+	}
+}
+
+module.exports = AutoPublicPathRuntimeModule;