Merge pull request #15246 from pavelsavara/import_meta_url

Disable compile time evaluation of import.meta.url

declarations/WebpackOptions.d.ts

@@ -2949,6 +2949,10 @@ export interface JavascriptParserOptions {
 	 * Specifies the behavior of invalid export names in "import ... from ...".
 	 */
 	importExportsPresence?: "error" | "warn" | "auto" | false;
+	/**
+	 * Enable/disable evaluating import.meta.
+	 */
+	importMeta?: boolean;
 	/**
 	 * Include polyfills or mocks for various node stuff.
 	 */

lib/config/defaults.js

@@ -469,6 +469,7 @@ const applyJavascriptParserOptionsDefaults = (
 	D(parserOptions, "wrappedContextRecursive", true);
 	D(parserOptions, "wrappedContextCritical", false);
 	D(parserOptions, "strictThisContextOnImports", false);
+	D(parserOptions, "importMeta", true);
 	if (futureDefaults) D(parserOptions, "exportsPresence", "error");
 };
 

lib/dependencies/ImportMetaPlugin.js

@@ -20,6 +20,7 @@ const propertyAccess = require("../util/propertyAccess");
 const ConstDependency = require("./ConstDependency");
 
 /** @typedef {import("estree").MemberExpression} MemberExpression */
+/** @typedef {import("../../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */
 /** @typedef {import("../Compiler")} Compiler */
 /** @typedef {import("../NormalModule")} NormalModule */
 /** @typedef {import("../javascript/JavascriptParser")} Parser */
@@ -44,11 +45,29 @@ class ImportMetaPlugin {
 					return pathToFileURL(module.resource).toString();
 				};
 				/**
-				 * @param {Parser} parser parser
+				 * @param {Parser} parser parser parser
-				 * @param {Object} parserOptions parserOptions
+				 * @param {JavascriptParserOptions} parserOptions parserOptions
 				 * @returns {void}
 				 */
-				const parserHandler = (parser, parserOptions) => {
+				const parserHandler = (parser, { importMeta }) => {
+					if (importMeta === false) {
+						const { importMetaName } = compilation.outputOptions;
+						if (importMetaName === "import.meta") return;
+
+						parser.hooks.expression
+							.for("import.meta")
+							.tap("ImportMetaPlugin", metaProperty => {
+								const dep = new ConstDependency(
+									importMetaName,
+									metaProperty.range
+								);
+								dep.loc = metaProperty.loc;
+								parser.state.module.addPresentationalDependency(dep);
+								return true;
+							});
+						return;
+					}
+
 					/// import.meta direct ///
 					parser.hooks.typeof
 						.for("import.meta")

schemas/WebpackOptions.json

@@ -1608,6 +1608,10 @@
           "description": "Specifies the behavior of invalid export names in \"import ... from ...\".",
           "enum": ["error", "warn", "auto", false]
         },
+        "importMeta": {
+          "description": "Enable/disable evaluating import.meta.",
+          "type": "boolean"
+        },
         "node": {
           "$ref": "#/definitions/Node"
         },

test/Defaults.unittest.js

@@ -218,6 +218,7 @@ describe("Defaults", () => {
 		        "exprContextRecursive": true,
 		        "exprContextRegExp": false,
 		        "exprContextRequest": ".",
+		        "importMeta": true,
 		        "strictExportPresence": undefined,
 		        "strictThisContextOnImports": false,
 		        "unknownContextCritical": true,

test/__snapshots__/Cli.basictest.js.snap

@@ -1612,6 +1612,19 @@ Object {
     "multiple": false,
     "simpleType": "string",
   },
+  "module-parser-javascript-auto-import-meta": Object {
+    "configs": Array [
+      Object {
+        "description": "Enable/disable evaluating import.meta.",
+        "multiple": false,
+        "path": "module.parser.javascript/auto.importMeta",
+        "type": "boolean",
+      },
+    ],
+    "description": "Enable/disable evaluating import.meta.",
+    "multiple": false,
+    "simpleType": "boolean",
+  },
   "module-parser-javascript-auto-node": Object {
     "configs": Array [
       Object {
@@ -2163,6 +2176,19 @@ Object {
     "multiple": false,
     "simpleType": "string",
   },
+  "module-parser-javascript-dynamic-import-meta": Object {
+    "configs": Array [
+      Object {
+        "description": "Enable/disable evaluating import.meta.",
+        "multiple": false,
+        "path": "module.parser.javascript/dynamic.importMeta",
+        "type": "boolean",
+      },
+    ],
+    "description": "Enable/disable evaluating import.meta.",
+    "multiple": false,
+    "simpleType": "boolean",
+  },
   "module-parser-javascript-dynamic-node": Object {
     "configs": Array [
       Object {
@@ -2675,6 +2701,19 @@ Object {
     "multiple": false,
     "simpleType": "string",
   },
+  "module-parser-javascript-esm-import-meta": Object {
+    "configs": Array [
+      Object {
+        "description": "Enable/disable evaluating import.meta.",
+        "multiple": false,
+        "path": "module.parser.javascript/esm.importMeta",
+        "type": "boolean",
+      },
+    ],
+    "description": "Enable/disable evaluating import.meta.",
+    "multiple": false,
+    "simpleType": "boolean",
+  },
   "module-parser-javascript-esm-node": Object {
     "configs": Array [
       Object {
@@ -3132,6 +3171,19 @@ Object {
     "multiple": false,
     "simpleType": "string",
   },
+  "module-parser-javascript-import-meta": Object {
+    "configs": Array [
+      Object {
+        "description": "Enable/disable evaluating import.meta.",
+        "multiple": false,
+        "path": "module.parser.javascript.importMeta",
+        "type": "boolean",
+      },
+    ],
+    "description": "Enable/disable evaluating import.meta.",
+    "multiple": false,
+    "simpleType": "boolean",
+  },
   "module-parser-javascript-node": Object {
     "configs": Array [
       Object {

test/configCases/module/externals/index.js

@@ -1,7 +1,13 @@
 import imported from "./imported.mjs";
 import value from "./module";
+import { metaUrl } from "./meta";
+const localMetaUrl = import.meta.url;
 
 it("should allow to use externals in concatenated modules", () => {
 	expect(imported).toBe(42);
 	expect(value).toBe(40);
 });
+
+it("all bundled files should have same url, when parser.javascript.importMeta === false", () => {
+	expect(localMetaUrl).toBe(metaUrl)
+});

test/configCases/module/externals/meta.js

@@ -0,0 +1 @@
+export const metaUrl = import.meta.url;

test/configCases/module/externals/webpack.config.js

@@ -1,5 +1,12 @@
 /** @type {import("../../../../").Configuration} */
 module.exports = {
+	module: {
+		parser: {
+			javascript: {
+				importMeta: false
+			}
+		}
+	},
 	entry: {
 		main: "./index.js",
 		imported: {

test/configCases/output/import-meta-name/a.js

@@ -0,0 +1 @@
+export const url = import.meta.url;

test/configCases/output/import-meta-name/index.js

@@ -0,0 +1,9 @@
+import { url } from "./a";
+
+it("should evaluate import.meta to pseudoImport.meta", () => {
+	expect(url).toBe("http://test.co/path/index.js");
+});
+
+it("should evaluate import.meta in runtime", () => {
+	expect(url).toBe(import.meta.url);
+});

test/configCases/output/import-meta-name/test.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+	moduleScope(scope) {
+		scope.pseudoImport = { meta: { url: "http://test.co/path/index.js" } };
+	}
+};

test/configCases/output/import-meta-name/webpack.config.js

@@ -0,0 +1,13 @@
+/** @type {import("../../../../").Configuration} */
+module.exports = {
+	output: {
+		importMetaName: "pseudoImport.meta"
+	},
+	module: {
+		parser: {
+			javascript: {
+				importMeta: false
+			}
+		}
+	}
+};

types.d.ts

@@ -5472,6 +5472,11 @@ declare interface JavascriptParserOptions {
 	 */
 	importExportsPresence?: false | "auto" | "error" | "warn";
 
+	/**
+	 * Enable/disable evaluating import.meta.
+	 */
+	importMeta?: boolean;
+
 	/**
 	 * Include polyfills or mocks for various node stuff.
 	 */