[fix] util polyfill to make compiler self-contained

this is needed for running the Svelte compiler in the browser
Fixes #8010

package-lock.json

@@ -47,7 +47,8 @@
         "sourcemap-codec": "^1.4.8",
         "tiny-glob": "^0.2.9",
         "tslib": "^2.4.0",
-        "typescript": "^3.7.5"
+        "typescript": "^3.7.5",
+        "util": "^0.12.5"
       },
       "engines": {
         "node": ">= 8"
@@ -3070,6 +3071,21 @@
         "node": ">=4"
       }
     },
+    "node_modules/is-generator-function": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/is-generator-function/-/is-generator-function-1.0.10.tgz",
+      "integrity": "sha512-jsEjy9l3yiXEQ+PsXdmBwEPcOxaXWLspKdplFUVI9vq1iZgIekeC0L167qeu86czQaxed3q/Uzuw0swL0irL8A==",
+      "dev": true,
+      "dependencies": {
+        "has-tostringtag": "^1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/is-glob": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.3.tgz",
@@ -4935,6 +4951,19 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/util": {
+      "version": "0.12.5",
+      "resolved": "https://registry.npmjs.org/util/-/util-0.12.5.tgz",
+      "integrity": "sha512-kZf/K6hEIrWHI6XqOFUiiMa+79wE/D8Q+NCNAWclkyg3b4d2k7s0QGepNjiABc+aR3N1PAyHL7p6UcLY6LmrnA==",
+      "dev": true,
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "is-arguments": "^1.0.4",
+        "is-generator-function": "^1.0.7",
+        "is-typed-array": "^1.1.3",
+        "which-typed-array": "^1.1.2"
+      }
+    },
     "node_modules/util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -7565,6 +7594,15 @@
       "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
       "dev": true
     },
+    "is-generator-function": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/is-generator-function/-/is-generator-function-1.0.10.tgz",
+      "integrity": "sha512-jsEjy9l3yiXEQ+PsXdmBwEPcOxaXWLspKdplFUVI9vq1iZgIekeC0L167qeu86czQaxed3q/Uzuw0swL0irL8A==",
+      "dev": true,
+      "requires": {
+        "has-tostringtag": "^1.0.0"
+      }
+    },
     "is-glob": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.3.tgz",
@@ -9024,6 +9062,19 @@
         "punycode": "^2.1.0"
       }
     },
+    "util": {
+      "version": "0.12.5",
+      "resolved": "https://registry.npmjs.org/util/-/util-0.12.5.tgz",
+      "integrity": "sha512-kZf/K6hEIrWHI6XqOFUiiMa+79wE/D8Q+NCNAWclkyg3b4d2k7s0QGepNjiABc+aR3N1PAyHL7p6UcLY6LmrnA==",
+      "dev": true,
+      "requires": {
+        "inherits": "^2.0.3",
+        "is-arguments": "^1.0.4",
+        "is-generator-function": "^1.0.7",
+        "is-typed-array": "^1.1.3",
+        "which-typed-array": "^1.1.2"
+      }
+    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",

package.json

@@ -148,6 +148,7 @@
     "periscopic": "^3.0.4",
     "puppeteer": "^2.0.0",
     "rollup": "^1.27.14",
+    "util": "^0.12.5",
     "source-map": "^0.7.4",
     "source-map-support": "^0.5.21",
     "sourcemap-codec": "^1.4.8",

rollup.config.js

@@ -108,8 +108,18 @@ export default [
 		input: 'src/compiler/index.ts',
 		plugins: [
 			replace({
-				__VERSION__: pkg.version
+				__VERSION__: pkg.version,
+				'process.env.NODE_DEBUG': false // appears inside the util package
 			}),
+			{
+				resolveId(id) {
+					// util is a built-in module in Node.js, but we want a self-contained compiler bundle
+					// that also works in the browser, so we load its polyfill instead
+					if (id === 'util') {
+						return require.resolve('./node_modules/util'); // just 'utils' would resolve this to the built-in module
+					}
+				}
+			},
 			resolve(),
 			commonjs({
 				include: ['node_modules/**']