deps: upgrade to cjs-module-lexer@1.0.0

deps/cjs-module-lexer/CHANGELOG.md

@@ -1,3 +1,10 @@
+1.0.0
+- Unsafe getter tracking (https://github.com/guybedford/cjs-module-lexer/pull/29)
+
+0.6.0
+- API-only breaking change: Unify JS and Wasm interfaces (https://github.com/guybedford/cjs-module-lexer/pull/27)
+- Add type definitions (https://github.com/guybedford/cjs-module-lexer/pull/28)
+
 0.5.2
 - Support named getter functions (https://github.com/guybedford/cjs-module-lexer/pull/26)
 

deps/cjs-module-lexer/README.md

@@ -19,7 +19,9 @@ npm install cjs-module-lexer
 For use in CommonJS:
 
 ```js
-const parse = require('cjs-module-lexer');
+const { parse } = require('cjs-module-lexer');
+
+// `init` return a promise for parity with the ESM API, but you do not have to call it
 
 const { exports, reexports } = parse(`
   // named exports detection
@@ -84,7 +86,9 @@ EXPORTS_SPREAD: `...` (IDENTIFIER | REQUIRE)
 
 EXPORTS_MEMBER: EXPORTS_DOT_ASSIGN | EXPORTS_LITERAL_COMPUTED_ASSIGN
 
-EXPORTS_DEFINE: `Object` `.` `defineProperty `(` IDENTIFIER_STRING `, {`
+EXPORTS_DEFINE: `Object` `.` `defineProperty `(` EXPORTS_IDENFITIER `,` IDENTIFIER_STRING
+
+EXPORTS_DEFINE_VALUE: EXPORTS_DEFINE `, {`
   (`enumerable: true,`)?
   (
     `value:` |
@@ -119,7 +123,9 @@ EXPORT_STAR_LIB: `Object.keys(` IDENTIFIER$1 `).forEach(function (` IDENTIFIER$2
 
 Spacing between tokens is taken to be any ECMA-262 whitespace, ECMA-262 block comment or ECMA-262 line comment.
 
-* The returned export names are taken to be the combination of the `IDENTIFIER` and `IDENTIFIER_STRING` slots for all `EXPORTS_MEMBER`, `EXPORTS_LITERAL` and `EXPORTS_DEFINE` matches.
+* The returned export names are taken to be the combination of:
+  1. All `IDENTIFIER` and `IDENTIFIER_STRING` slots for `EXPORTS_MEMBER` and `EXPORTS_LITERAL` matches.
+  2. The first `IDENTIFIER_STRING` slot for all `EXPORTS_DEFINE_VALUE` matches where that same string is not an `EXPORTS_DEFINE` match that is not also an `EXPORTS_DEFINE_VALUE` match.
 * The reexport specifiers are taken to be the the combination of:
   1. The `REQUIRE` matches of the last matched of either `MODULE_EXPORTS_ASSIGN` or `EXPORTS_LITERAL`.
   2. All _top-level_ `EXPORT_STAR` `REQUIRE` matches and `EXPORTS_ASSIGN` matches whose `IDENTIFIER` also matches the first `IDENTIFIER` in `EXPORT_STAR_LIB`.
@@ -160,6 +166,8 @@ It will in turn underclassify in cases where the identifiers are renamed:
 })(exports);
 ```
 
+#### Getter Exports Parsing
+
 `Object.defineProperty` is detected for specifically value and getter forms returning an identifier or member expression:
 
 ```js
@@ -186,6 +194,24 @@ Object.defineProperty(exports, 'd', { value: 'd' });
 Object.defineProperty(exports, '__esModule', { value: true });
 ```
 
+To avoid matching getters that have side effects, any getter for an export name that does not support the forms above will
+opt-out of the getter matching:
+
+```js
+// DETECTS: NO EXPORTS
+Object.defineProperty(exports, 'a', {
+  value: 'no problem'
+});
+
+if (false) {
+  Object.defineProperty(module.exports, 'a', {
+    get () {
+      return dynamic();
+    }
+  })
+}
+```
+
 Alternative object definition structures or getter function bodies are not detected:
 
 ```js
@@ -335,63 +361,63 @@ JS Build:
 
 ```
 Module load time
-> 5ms
+> 4ms
 Cold Run, All Samples
 test/samples/*.js (3635 KiB)
-> 323ms
+> 299ms
 
 Warm Runs (average of 25 runs)
 test/samples/angular.js (1410 KiB)
-> 14.84ms
+> 13.96ms
 test/samples/angular.min.js (303 KiB)
-> 4.8ms
+> 4.72ms
 test/samples/d3.js (553 KiB)
-> 7.84ms
+> 6.76ms
 test/samples/d3.min.js (250 KiB)
 > 4ms
 test/samples/magic-string.js (34 KiB)
-> 0.72ms
+> 0.64ms
 test/samples/magic-string.min.js (20 KiB)
-> 0.4ms
+> 0ms
 test/samples/rollup.js (698 KiB)
-> 9.32ms
+> 8.48ms
 test/samples/rollup.min.js (367 KiB)
-> 6.52ms
+> 5.36ms
 
 Warm Runs, All Samples (average of 25 runs)
 test/samples/*.js (3635 KiB)
-> 44ms
+> 40.28ms
 ```
 
 Wasm Build:
 ```
 Module load time
-> 11ms
+> 10ms
 Cold Run, All Samples
 test/samples/*.js (3635 KiB)
-> 42ms
+> 43ms
 
 Warm Runs (average of 25 runs)
 test/samples/angular.js (1410 KiB)
-> 9.92ms
+> 9.32ms
 test/samples/angular.min.js (303 KiB)
-> 3.2ms
+> 3.16ms
 test/samples/d3.js (553 KiB)
-> 5.2ms
+> 5ms
 test/samples/d3.min.js (250 KiB)
-> 2.52ms
+> 2.32ms
 test/samples/magic-string.js (34 KiB)
 > 0.16ms
 test/samples/magic-string.min.js (20 KiB)
-> 0.04ms
+> 0ms
 test/samples/rollup.js (698 KiB)
-> 6.44ms
+> 6.28ms
 test/samples/rollup.min.js (367 KiB)
-> 3.96ms
+> 3.6ms
 
 Warm Runs, All Samples (average of 25 runs)
 test/samples/*.js (3635 KiB)
-> 30.48ms
+> 27.76ms
 ```
 
 ### Wasm Build Steps

deps/cjs-module-lexer/lexer.js

@@ -11,6 +11,7 @@ let openTokenDepth,
   starExportMap,
   lastStarExportSpecifier,
   _exports,
+  unsafeGetters,
   reexports;
 
 function resetState () {
@@ -27,6 +28,7 @@ function resetState () {
   lastStarExportSpecifier = null;
 
   _exports = new Set();
+  unsafeGetters = new Set();
   reexports = new Set();
 }
 
@@ -37,7 +39,7 @@ const ExportStar = 2;
 
 const strictReserved = new Set(['implements', 'interface', 'let', 'package', 'private', 'protected', 'public', 'static', 'yield', 'enum']);
 
-module.exports = function parseCJS (source, name = '@') {
+function parseCJS (source, name = '@') {
   resetState();
   try {
     parseSource(source);
@@ -47,7 +49,7 @@ module.exports = function parseCJS (source, name = '@') {
     e.loc = pos;
     throw e;
   }
-  const result = { exports: [..._exports], reexports: [...reexports] };
+  const result = { exports: [..._exports].filter(expt => !unsafeGetters.has(expt)), reexports: [...reexports] };
   resetState();
   return result;
 }
@@ -260,6 +262,7 @@ function tryParseObjectDefineOrKeys (keys) {
     pos++;
     ch = commentWhitespace();
     if (ch === 100/*d*/ && source.startsWith('efineProperty', pos + 1)) {
+      let expt;
       while (true) {
         pos += 14;
         revertPos = pos - 1;
@@ -276,7 +279,7 @@ function tryParseObjectDefineOrKeys (keys) {
         let quot = ch;
         const exportPos = ++pos;
         if (!identifier() || source.charCodeAt(pos) !== quot) break;
-        const expt = source.slice(exportPos, pos);
+        expt = source.slice(exportPos, pos);
         pos++;
         ch = commentWhitespace();
         if (ch !== 44/*,*/) break;
@@ -304,9 +307,9 @@ function tryParseObjectDefineOrKeys (keys) {
           pos += 5;
           ch = commentWhitespace();
           if (ch !== 58/*:*/) break;
-          pos++;
           addExport(expt);
-          break;
+          pos = revertPos;
+          return;
         }
         else if (ch === 103/*g*/) {
           if (!source.startsWith('et', pos + 1)) break;
@@ -372,6 +375,9 @@ function tryParseObjectDefineOrKeys (keys) {
         }
         break;
       }
+      if (expt) {
+        unsafeGetters.add(expt);
+      }
     }
     else if (keys && ch === 107/*k*/ && source.startsWith('eys', pos + 1)) {
       while (true) {
@@ -899,7 +905,7 @@ function tryParseLiteralExports () {
 
 // --- Extracted from AcornJS ---
 //(https://github.com/acornjs/acorn/blob/master/acorn/src/identifier.js#L23
-// 
+//
 // MIT License
 
 // Copyright (C) 2012-2018 by various contributors (see AUTHORS)
@@ -1034,7 +1040,7 @@ function throwIfImportStatement () {
     case 46/*.*/:
       throw new Error('Unexpected import.meta in CJS module.');
       return;
-    
+
     default:
       // no space after "import" -> not an import keyword
       if (pos === startPos + 6)
@@ -1203,7 +1209,7 @@ function readPrecedingKeyword (pos, match) {
 }
 
 function readPrecedingKeyword1 (pos, ch) {
-  return source.charCodeAt(pos) === ch && (pos === 0 || isBrOrWsOrPunctuatorNotDot(source.charCodeAt(pos - 1)));  
+  return source.charCodeAt(pos) === ch && (pos === 0 || isBrOrWsOrPunctuatorNotDot(source.charCodeAt(pos - 1)));
 }
 
 // Detects one of case, debugger, delete, do, else, in, instanceof, new,
@@ -1274,7 +1280,7 @@ function isExpressionKeyword (pos) {
           // throw
           return readPrecedingKeyword(pos - 2, 'thr');
         default:
-          return false; 
+          return false;
       }
   }
   return false;
@@ -1320,3 +1326,8 @@ function isExpressionTerminator (curPos) {
   }
   return false;
 }
+
+const initPromise = Promise.resolve();
+
+module.exports.init = () => initPromise;
+module.exports.parse = parseCJS;

deps/cjs-module-lexer/package.json

@@ -1,12 +1,13 @@
 {
   "name": "cjs-module-lexer",
-  "version": "0.5.2",
+  "version": "1.0.0",
   "description": "Lexes CommonJS modules, returning their named exports metadata",
   "main": "lexer.js",
   "exports": {
     "import": "./dist/lexer.mjs",
     "default": "./lexer.js"
   },
+  "types": "lexer.d.ts",
   "scripts": {
     "test-js": "mocha -b -u tdd test/*.js",
     "test-wasm": "WASM=1 mocha -b -u tdd test/*.js",
@@ -28,7 +29,8 @@
     "terser": "^4.1.4"
   },
   "files": [
-    "dist"
+    "dist",
+    "lexer.d.ts"
   ],
   "repository": {
     "type": "git",

lib/internal/modules/esm/translators.js

@@ -63,7 +63,7 @@ const { emitWarningSync } = require('internal/process/warning');
 let cjsParse;
 async function initCJSParse() {
   if (typeof WebAssembly === 'undefined') {
-    cjsParse = require('internal/deps/cjs-module-lexer/lexer');
+    cjsParse = require('internal/deps/cjs-module-lexer/lexer').parse;
   } else {
     const { parse, init } =
         require('internal/deps/cjs-module-lexer/dist/lexer');