src: move package resolver to c++

Co-authored-by: Daniel Lemire <[email protected]>
PR-URL: #50322
Reviewed-By: Jacob Smith <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Antoine du Hamel <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Geoffrey Booth <[email protected]>

Author: 2 people

lib/internal/modules/cjs/loader.js

@@ -427,7 +427,7 @@ ObjectDefineProperty(Module, '_readPackage', {
  * @param {string} originalPath The specifier passed to `require`
  */
 function tryPackage(requestPath, exts, isMain, originalPath) {
-  const pkg = _readPackage(requestPath).main;
+  const { main: pkg, pjsonPath } = _readPackage(requestPath);
 
   if (!pkg) {
     return tryExtensions(path.resolve(requestPath, 'index'), exts, isMain);
@@ -446,14 +446,13 @@ function tryPackage(requestPath, exts, isMain, originalPath) {
         'Please verify that the package.json has a valid "main" entry',
       );
       err.code = 'MODULE_NOT_FOUND';
-      err.path = path.resolve(requestPath, 'package.json');
+      err.path = pjsonPath;
       err.requestPath = originalPath;
       // TODO(BridgeAR): Add the requireStack as well.
       throw err;
     } else {
-      const jsonPath = path.resolve(requestPath, 'package.json');
       process.emitWarning(
-        `Invalid 'main' field in '${jsonPath}' of '${pkg}'. ` +
+        `Invalid 'main' field in '${pjsonPath}' of '${pkg}'. ` +
           'Please either fix that or report it to the module author',
         'DeprecationWarning',
         'DEP0128',
@@ -539,28 +538,28 @@ function trySelfParentPath(parent) {
 function trySelf(parentPath, request) {
   if (!parentPath) { return false; }
 
-  const { data: pkg, path: pkgPath } = packageJsonReader.readPackageScope(parentPath);
-  if (!pkg || pkg.exports == null || pkg.name === undefined) {
+  const pkg = packageJsonReader.getNearestParentPackageJSON(parentPath);
+  if (pkg?.data.exports === undefined || pkg.data.name === undefined) {
     return false;
   }
 
   let expansion;
-  if (request === pkg.name) {
+  if (request === pkg.data.name) {
     expansion = '.';
-  } else if (StringPrototypeStartsWith(request, `${pkg.name}/`)) {
-    expansion = '.' + StringPrototypeSlice(request, pkg.name.length);
+  } else if (StringPrototypeStartsWith(request, `${pkg.data.name}/`)) {
+    expansion = '.' + StringPrototypeSlice(request, pkg.data.name.length);
   } else {
     return false;
   }
 
   try {
     const { packageExportsResolve } = require('internal/modules/esm/resolve');
     return finalizeEsmResolution(packageExportsResolve(
-      pathToFileURL(pkgPath + '/package.json'), expansion, pkg,
-      pathToFileURL(parentPath), getCjsConditions()), parentPath, pkgPath);
+      pathToFileURL(pkg.path + '/package.json'), expansion, pkg.data,
+      pathToFileURL(parentPath), getCjsConditions()), parentPath, pkg.path);
   } catch (e) {
     if (e.code === 'ERR_MODULE_NOT_FOUND') {
-      throw createEsmNotFoundErr(request, pkgPath + '/package.json');
+      throw createEsmNotFoundErr(request, pkg.path + '/package.json');
     }
     throw e;
   }
@@ -1099,7 +1098,7 @@ Module._resolveFilename = function(request, parent, isMain, options) {
 
   if (request[0] === '#' && (parent?.filename || parent?.id === '<repl>')) {
     const parentPath = parent?.filename ?? process.cwd() + path.sep;
-    const pkg = packageJsonReader.readPackageScope(parentPath) || { __proto__: null };
+    const pkg = packageJsonReader.getNearestParentPackageJSON(parentPath) || { __proto__: null };
     if (pkg.data?.imports != null) {
       try {
         const { packageImportsResolve } = require('internal/modules/esm/resolve');
@@ -1397,9 +1396,9 @@ Module._extensions['.js'] = function(module, filename) {
     content = fs.readFileSync(filename, 'utf8');
   }
   if (StringPrototypeEndsWith(filename, '.js')) {
-    const pkg = packageJsonReader.readPackageScope(filename) || { __proto__: null };
+    const pkg = packageJsonReader.getNearestParentPackageJSON(filename);
     // Function require shouldn't be used in ES modules.
-    if (pkg.data?.type === 'module') {
+    if (pkg?.data.type === 'module') {
       // This is an error path because `require` of a `.js` file in a `"type": "module"` scope is not allowed.
       const parent = moduleParentCache.get(module);
       const parentPath = parent?.filename;

lib/internal/modules/esm/get_format.js

@@ -19,7 +19,7 @@ const {
 const experimentalNetworkImports =
   getOptionValue('--experimental-network-imports');
 const { containsModuleSyntax } = internalBinding('contextify');
-const { getPackageType } = require('internal/modules/esm/resolve');
+const { getPackageType } = require('internal/modules/esm/package_config');
 const { fileURLToPath } = require('internal/url');
 const { ERR_UNKNOWN_FILE_EXTENSION } = require('internal/errors').codes;
 

lib/internal/modules/esm/module_job.js

@@ -228,7 +228,7 @@ class ModuleJob {
         const packageConfig =
           StringPrototypeStartsWith(this.module.url, 'file://') &&
             RegExpPrototypeExec(/\.js(\?[^#]*)?(#.*)?$/, this.module.url) !== null &&
-            require('internal/modules/esm/resolve')
+            require('internal/modules/esm/package_config')
               .getPackageScopeConfig(this.module.url);
         if (packageConfig.type === 'module') {
           e.message +=

lib/internal/modules/esm/package_config.js

@@ -1,69 +1,44 @@
 'use strict';
 
-const {
-  StringPrototypeEndsWith,
-} = primordials;
-const { URL, fileURLToPath } = require('internal/url');
-const packageJsonReader = require('internal/modules/package_json_reader');
+const { ArrayIsArray } = primordials;
+const modulesBinding = internalBinding('modules');
+const { deserializePackageJSON } = require('internal/modules/package_json_reader');
 
-/**
- * @typedef {object} PackageConfig
- * @property {string} pjsonPath - The path to the package.json file.
- * @property {boolean} exists - Whether the package.json file exists.
- * @property {'none' | 'commonjs' | 'module'} type - The type of the package.
- * @property {string} [name] - The name of the package.
- * @property {string} [main] - The main entry point of the package.
- * @property {PackageTarget} [exports] - The exports configuration of the package.
- * @property {Record<string, string | Record<string, string>>} [imports] - The imports configuration of the package.
- */
-/**
- * @typedef {string | string[] | Record<string, string | Record<string, string>>} PackageTarget
- */
+// TODO(@anonrig): Merge this file with internal/esm/package_json_reader.js
 
 /**
  * Returns the package configuration for the given resolved URL.
  * @param {URL | string} resolved - The resolved URL.
- * @returns {PackageConfig} - The package configuration.
+ * @returns {import('typings/internalBinding/modules').PackageConfig} - The package configuration.
  */
 function getPackageScopeConfig(resolved) {
-  let packageJSONUrl = new URL('./package.json', resolved);
-  while (true) {
-    const packageJSONPath = packageJSONUrl.pathname;
-    if (StringPrototypeEndsWith(packageJSONPath, 'node_modules/package.json')) {
-      break;
-    }
-    const packageConfig = packageJsonReader.read(fileURLToPath(packageJSONUrl), {
-      __proto__: null,
-      specifier: resolved,
-      isESM: true,
-    });
-    if (packageConfig.exists) {
-      return packageConfig;
-    }
-
-    const lastPackageJSONUrl = packageJSONUrl;
-    packageJSONUrl = new URL('../package.json', packageJSONUrl);
+  const result = modulesBinding.getPackageScopeConfig(`${resolved}`);
 
-    // Terminates at root where ../package.json equals ../../package.json
-    // (can't just check "/package.json" for Windows support).
-    if (packageJSONUrl.pathname === lastPackageJSONUrl.pathname) {
-      break;
-    }
+  if (ArrayIsArray(result)) {
+    return deserializePackageJSON(`${resolved}`, result, false /* checkIntegrity */);
   }
-  const packageJSONPath = fileURLToPath(packageJSONUrl);
+
+  // This means that the response is a string
+  // and it is the path to the package.json file
   return {
     __proto__: null,
-    pjsonPath: packageJSONPath,
+    pjsonPath: result,
     exists: false,
-    main: undefined,
-    name: undefined,
     type: 'none',
-    exports: undefined,
-    imports: undefined,
   };
 }
 
+/**
+ * Returns the package type for a given URL.
+ * @param {URL} url - The URL to get the package type for.
+ */
+function getPackageType(url) {
+  // TODO(@anonrig): Write a C++ function that returns only "type".
+  return getPackageScopeConfig(url).type;
+}
+
 
 module.exports = {
   getPackageScopeConfig,
+  getPackageType,
 };

lib/internal/modules/esm/resolve.js

@@ -198,7 +198,7 @@ const legacyMainResolveExtensionsIndexes = {
  * 4. TRY(pkg_url/index.js, pkg_url/index.json, pkg_url/index.node)
  * 5. NOT_FOUND
  * @param {URL} packageJSONUrl
- * @param {PackageConfig} packageConfig
+ * @param {import('typings/internalBinding/modules').PackageConfig} packageConfig
  * @param {string | URL | undefined} base
  * @returns {URL}
  */
@@ -502,7 +502,7 @@ function resolvePackageTarget(packageJSONUrl, target, subpath, packageSubpath,
       }
       return resolveResult;
     }
-    if (lastException === undefined || lastException === null) {
+    if (lastException == null) {
       return lastException;
     }
     throw lastException;
@@ -575,7 +575,7 @@ function isConditionalExportsMainSugar(exports, packageJSONUrl, base) {
  */
 function packageExportsResolve(
   packageJSONUrl, packageSubpath, packageConfig, base, conditions) {
-  let exports = packageConfig.exports;
+  let { exports } = packageConfig;
   if (isConditionalExportsMainSugar(exports, packageJSONUrl, base)) {
     exports = { '.': exports };
   }
@@ -740,15 +740,6 @@ function packageImportsResolve(name, base, conditions) {
   throw importNotDefined(name, packageJSONUrl, base);
 }
 
-/**
- * Returns the package type for a given URL.
- * @param {URL} url - The URL to get the package type for.
- */
-function getPackageType(url) {
-  const packageConfig = getPackageScopeConfig(url);
-  return packageConfig.type;
-}
-
 /**
  * Parse a package name from a specifier.
  * @param {string} specifier - The import specifier.
@@ -796,6 +787,7 @@ function parsePackageName(specifier, base) {
  * @returns {URL} - The resolved URL.
  */
 function packageResolve(specifier, base, conditions) {
+  // TODO(@anonrig): Move this to a C++ function.
   if (BuiltinModule.canBeRequiredWithoutScheme(specifier)) {
     return new URL('node:' + specifier);
   }
@@ -1179,8 +1171,6 @@ module.exports = {
   decorateErrorWithCommonJSHints,
   defaultResolve,
   encodedSepRegEx,
-  getPackageScopeConfig,
-  getPackageType,
   packageExportsResolve,
   packageImportsResolve,
   throwIfInvalidParentURL,