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module: add findPackageJSON util
PR-URL: #55412 Backport-PR-URL: #56494 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]>
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‎doc/api/module.md

+82
Original file line numberDiff line numberDiff line change
@@ -217,6 +217,88 @@ added: v22.8.0
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* Returns: {string|undefined} Path to the [module compile cache][] directory if it is enabled,
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or `undefined` otherwise.
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220+
### `module.findPackageJSON(specifier[, base])`
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<!-- YAML
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added: REPLACEME
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-->
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> Stability: 1.1 - Active Development
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* `specifier` {string|URL} The specifier for the module whose `package.json` to
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retrieve. When passing a _bare specifier_, the `package.json` at the root of
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the package is returned. When passing a _relative specifier_ or an _absolute specifier_,
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the closest parent `package.json` is returned.
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* `base` {string|URL} The absolute location (`file:` URL string or FS path) of the
233+
containing module. For CJS, use `__filename` (not `__dirname`!); for ESM, use
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`import.meta.url`. You do not need to pass it if `specifier` is an `absolute specifier`.
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* Returns: {string|undefined} A path if the `package.json` is found. When `startLocation`
236+
is a package, the package's root `package.json`; when a relative or unresolved, the closest
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`package.json` to the `startLocation`.
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> **Caveat**: Do not use this to try to determine module format. There are many things effecting
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> that determination; the `type` field of package.json is the _least_ definitive (ex file extension
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> superceeds it, and a loader hook superceeds that).
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```text
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/path/to/project
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├ packages/
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├ bar/
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├ bar.js
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└ package.json // name = '@foo/bar'
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└ qux/
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├ node_modules/
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└ some-package/
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└ package.json // name = 'some-package'
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├ qux.js
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└ package.json // name = '@foo/qux'
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├ main.js
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└ package.json // name = '@foo'
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```
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```mjs
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// /path/to/project/packages/bar/bar.js
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import { findPackageJSON } from 'node:module';
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findPackageJSON('..', import.meta.url);
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// '/path/to/project/package.json'
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// Same result when passing an absolute specifier instead:
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findPackageJSON(new URL('../', import.meta.url));
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findPackageJSON(import.meta.resolve('../'));
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findPackageJSON('some-package', import.meta.url);
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// '/path/to/project/packages/bar/node_modules/some-package/package.json'
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// When passing an absolute specifier, you might get a different result if the
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// resolved module is inside a subfolder that has nested `package.json`.
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findPackageJSON(import.meta.resolve('some-package'));
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// '/path/to/project/packages/bar/node_modules/some-package/some-subfolder/package.json'
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findPackageJSON('@foo/qux', import.meta.url);
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// '/path/to/project/packages/qux/package.json'
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```
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```cjs
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// /path/to/project/packages/bar/bar.js
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const { findPackageJSON } = require('node:module');
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const { pathToFileURL } = require('node:url');
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const path = require('node:path');
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findPackageJSON('..', __filename);
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// '/path/to/project/package.json'
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// Same result when passing an absolute specifier instead:
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findPackageJSON(pathToFileURL(path.join(__dirname, '..')));
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findPackageJSON('some-package', __filename);
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// '/path/to/project/packages/bar/node_modules/some-package/package.json'
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// When passing an absolute specifier, you might get a different result if the
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// resolved module is inside a subfolder that has nested `package.json`.
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findPackageJSON(pathToFileURL(require.resolve('some-package')));
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// '/path/to/project/packages/bar/node_modules/some-package/some-subfolder/package.json'
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findPackageJSON('@foo/qux', __filename);
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// '/path/to/project/packages/qux/package.json'
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```
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### `module.isBuiltin(moduleName)`
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<!-- YAML

‎lib/internal/modules/cjs/loader.js

+11-11
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@@ -603,11 +603,11 @@ function trySelf(parentPath, request) {
603603
try {
604604
const { packageExportsResolve } = require('internal/modules/esm/resolve');
605605
return finalizeEsmResolution(packageExportsResolve(
606-
pathToFileURL(pkg.path + '/package.json'), expansion, pkg.data,
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pathToFileURL(pkg.path), expansion, pkg.data,
607607
pathToFileURL(parentPath), getCjsConditions()), parentPath, pkg.path);
608608
} catch (e) {
609609
if (e.code === 'ERR_MODULE_NOT_FOUND') {
610-
throw createEsmNotFoundErr(request, pkg.path + '/package.json');
610+
throw createEsmNotFoundErr(request, pkg.path);
611611
}
612612
throw e;
613613
}
@@ -1184,14 +1184,15 @@ Module._resolveFilename = function(request, parent, isMain, options) {
11841184

11851185
if (request[0] === '#' && (parent?.filename || parent?.id === '<repl>')) {
11861186
const parentPath = parent?.filename ?? process.cwd() + path.sep;
1187-
const pkg = packageJsonReader.getNearestParentPackageJSON(parentPath) || { __proto__: null };
1188-
if (pkg.data?.imports != null) {
1187+
const pkg = packageJsonReader.getNearestParentPackageJSON(parentPath);
1188+
if (pkg?.data.imports != null) {
11891189
try {
11901190
const { packageImportsResolve } = require('internal/modules/esm/resolve');
11911191
return finalizeEsmResolution(
1192-
packageImportsResolve(request, pathToFileURL(parentPath),
1193-
getCjsConditions()), parentPath,
1194-
pkg.path);
1192+
packageImportsResolve(request, pathToFileURL(parentPath), getCjsConditions()),
1193+
parentPath,
1194+
pkg.path,
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);
11951196
} catch (e) {
11961197
if (e.code === 'ERR_MODULE_NOT_FOUND') {
11971198
throw createEsmNotFoundErr(request);
@@ -1251,8 +1252,7 @@ function finalizeEsmResolution(resolved, parentPath, pkgPath) {
12511252
if (actual) {
12521253
return actual;
12531254
}
1254-
const err = createEsmNotFoundErr(filename,
1255-
path.resolve(pkgPath, 'package.json'));
1255+
const err = createEsmNotFoundErr(filename, pkgPath);
12561256
throw err;
12571257
}
12581258

@@ -1598,7 +1598,7 @@ function loadTS(module, filename) {
15981598

15991599
const parent = module[kModuleParent];
16001600
const parentPath = parent?.filename;
1601-
const packageJsonPath = path.resolve(pkg.path, 'package.json');
1601+
const packageJsonPath = pkg.path;
16021602
const usesEsm = containsModuleSyntax(content, filename);
16031603
const err = new ERR_REQUIRE_ESM(filename, usesEsm, parentPath,
16041604
packageJsonPath);
@@ -1657,7 +1657,7 @@ Module._extensions['.js'] = function(module, filename) {
16571657
// This is an error path because `require` of a `.js` file in a `"type": "module"` scope is not allowed.
16581658
const parent = module[kModuleParent];
16591659
const parentPath = parent?.filename;
1660-
const packageJsonPath = path.resolve(pkg.path, 'package.json');
1660+
const packageJsonPath = pkg.path;
16611661
const usesEsm = containsModuleSyntax(content, filename);
16621662
const err = new ERR_REQUIRE_ESM(filename, usesEsm, parentPath,
16631663
packageJsonPath);

‎lib/internal/modules/esm/resolve.js

+16-87
Original file line numberDiff line numberDiff line change
@@ -356,7 +356,6 @@ function invalidPackageTarget(
356356

357357
const invalidSegmentRegEx = /(^|\\|\/)((\.|%2e)(\.|%2e)?|(n|%6e|%4e)(o|%6f|%4f)(d|%64|%44)(e|%65|%45)(_|%5f)(m|%6d|%4d)(o|%6f|%4f)(d|%64|%44)(u|%75|%55)(l|%6c|%4c)(e|%65|%45)(s|%73|%53))?(\\|\/|$)/i;
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const deprecatedInvalidSegmentRegEx = /(^|\\|\/)((\.|%2e)(\.|%2e)?|(n|%6e|%4e)(o|%6f|%4f)(d|%64|%44)(e|%65|%45)(_|%5f)(m|%6d|%4d)(o|%6f|%4f)(d|%64|%44)(u|%75|%55)(l|%6c|%4c)(e|%65|%45)(s|%73|%53))(\\|\/|$)/i;
359-
const invalidPackageNameRegEx = /^\.|%|\\/;
360359
const patternRegEx = /\*/g;
361360

362361
/**
@@ -752,44 +751,6 @@ function packageImportsResolve(name, base, conditions) {
752751
throw importNotDefined(name, packageJSONUrl, base);
753752
}
754753

755-
/**
756-
* Parse a package name from a specifier.
757-
* @param {string} specifier - The import specifier.
758-
* @param {string | URL | undefined} base - The parent URL.
759-
*/
760-
function parsePackageName(specifier, base) {
761-
let separatorIndex = StringPrototypeIndexOf(specifier, '/');
762-
let validPackageName = true;
763-
let isScoped = false;
764-
if (specifier[0] === '@') {
765-
isScoped = true;
766-
if (separatorIndex === -1 || specifier.length === 0) {
767-
validPackageName = false;
768-
} else {
769-
separatorIndex = StringPrototypeIndexOf(
770-
specifier, '/', separatorIndex + 1);
771-
}
772-
}
773-
774-
const packageName = separatorIndex === -1 ?
775-
specifier : StringPrototypeSlice(specifier, 0, separatorIndex);
776-
777-
// Package name cannot have leading . and cannot have percent-encoding or
778-
// \\ separators.
779-
if (RegExpPrototypeExec(invalidPackageNameRegEx, packageName) !== null) {
780-
validPackageName = false;
781-
}
782-
783-
if (!validPackageName) {
784-
throw new ERR_INVALID_MODULE_SPECIFIER(
785-
specifier, 'is not a valid package name', fileURLToPath(base));
786-
}
787-
788-
const packageSubpath = '.' + (separatorIndex === -1 ? '' :
789-
StringPrototypeSlice(specifier, separatorIndex));
790-
791-
return { packageName, packageSubpath, isScoped };
792-
}
793754

794755
/**
795756
* Resolves a package specifier to a URL.
@@ -804,57 +765,24 @@ function packageResolve(specifier, base, conditions) {
804765
return new URL('node:' + specifier);
805766
}
806767

807-
const { packageName, packageSubpath, isScoped } =
808-
parsePackageName(specifier, base);
768+
const { packageJSONUrl, packageJSONPath, packageSubpath } = packageJsonReader.getPackageJSONURL(specifier, base);
809769

810-
// ResolveSelf
811-
const packageConfig = packageJsonReader.getPackageScopeConfig(base);
812-
if (packageConfig.exists) {
813-
if (packageConfig.exports != null && packageConfig.name === packageName) {
814-
const packageJSONUrl = pathToFileURL(packageConfig.pjsonPath);
815-
return packageExportsResolve(
816-
packageJSONUrl, packageSubpath, packageConfig, base, conditions);
817-
}
818-
}
770+
const packageConfig = packageJsonReader.read(packageJSONPath, { __proto__: null, specifier, base, isESM: true });
819771

820-
let packageJSONUrl =
821-
new URL('./node_modules/' + packageName + '/package.json', base);
822-
let packageJSONPath = fileURLToPath(packageJSONUrl);
823-
let lastPath;
824-
do {
825-
const stat = internalFsBinding.internalModuleStat(
826-
internalFsBinding,
827-
StringPrototypeSlice(packageJSONPath, 0, packageJSONPath.length - 13),
772+
// Package match.
773+
if (packageConfig.exports != null) {
774+
return packageExportsResolve(
775+
packageJSONUrl, packageSubpath, packageConfig, base, conditions);
776+
}
777+
if (packageSubpath === '.') {
778+
return legacyMainResolve(
779+
packageJSONUrl,
780+
packageConfig,
781+
base,
828782
);
829-
// Check for !stat.isDirectory()
830-
if (stat !== 1) {
831-
lastPath = packageJSONPath;
832-
packageJSONUrl = new URL((isScoped ?
833-
'../../../../node_modules/' : '../../../node_modules/') +
834-
packageName + '/package.json', packageJSONUrl);
835-
packageJSONPath = fileURLToPath(packageJSONUrl);
836-
continue;
837-
}
838-
839-
// Package match.
840-
const packageConfig = packageJsonReader.read(packageJSONPath, { __proto__: null, specifier, base, isESM: true });
841-
if (packageConfig.exports != null) {
842-
return packageExportsResolve(
843-
packageJSONUrl, packageSubpath, packageConfig, base, conditions);
844-
}
845-
if (packageSubpath === '.') {
846-
return legacyMainResolve(
847-
packageJSONUrl,
848-
packageConfig,
849-
base,
850-
);
851-
}
852-
853-
return new URL(packageSubpath, packageJSONUrl);
854-
// Cross-platform root check.
855-
} while (packageJSONPath.length !== lastPath.length);
783+
}
856784

857-
throw new ERR_MODULE_NOT_FOUND(packageName, fileURLToPath(base), null);
785+
return new URL(packageSubpath, packageJSONUrl);
858786
}
859787

860788
/**
@@ -1105,10 +1033,11 @@ module.exports = {
11051033
decorateErrorWithCommonJSHints,
11061034
defaultResolve,
11071035
encodedSepRegEx,
1036+
legacyMainResolve,
11081037
packageExportsResolve,
11091038
packageImportsResolve,
1039+
packageResolve,
11101040
throwIfInvalidParentURL,
1111-
legacyMainResolve,
11121041
};
11131042

11141043
// cycle

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