mlly/dist/index.mjs

Missing ECMAScript module utils for Node.js

import { tokenizer } from 'acorn';
import { builtinModules, createRequire } from 'node:module';
import fs, { realpathSync, statSync, promises } from 'node:fs';
import { joinURL } from 'ufo';
import { normalize, isAbsolute, extname as extname$1 } from 'pathe';
import { readPackageJSON } from 'pkg-types';
import { fileURLToPath as fileURLToPath$1, pathToFileURL as pathToFileURL$1 } from 'node:url';
import assert from 'node:assert';
import process$1 from 'node:process';
import path, { dirname } from 'node:path';
import v8 from 'node:v8';
import { format, inspect } from 'node:util';

const BUILTIN_MODULES = new Set(builtinModules);
function normalizeSlash(path) {
  return path.replace(/\\/g, "/");
}
function isObject(value) {
  return value !== null && typeof value === "object";
}
function matchAll(regex, string, addition) {
  const matches = [];
  for (const match of string.matchAll(regex)) {
    matches.push({
      ...addition,
      ...match.groups,
      code: match[0],
      start: match.index,
      end: (match.index || 0) + match[0].length
    });
  }
  return matches;
}
function clearImports(imports) {
  return (imports || "").replace(/\/\/[^\n]*\n|\/\*.*\*\//g, "").replace(/\s+/g, " ");
}
function getImportNames(cleanedImports) {
  const topLevelImports = cleanedImports.replace(/{[^}]*}/, "");
  const namespacedImport = topLevelImports.match(/\* as \s*(\S*)/)?.[1];
  const defaultImport = topLevelImports.split(",").find((index) => !/[*{}]/.test(index))?.trim() || void 0;
  return {
    namespacedImport,
    defaultImport
  };
}

/**
 * @typedef ErrnoExceptionFields
 * @property {number | undefined} [errnode]
 * @property {string | undefined} [code]
 * @property {string | undefined} [path]
 * @property {string | undefined} [syscall]
 * @property {string | undefined} [url]
 *
 * @typedef {Error & ErrnoExceptionFields} ErrnoException
 */


const own$1 = {}.hasOwnProperty;

const classRegExp = /^([A-Z][a-z\d]*)+$/;
// Sorted by a rough estimate on most frequently used entries.
const kTypes = new Set([
  'string',
  'function',
  'number',
  'object',
  // Accept 'Function' and 'Object' as alternative to the lower cased version.
  'Function',
  'Object',
  'boolean',
  'bigint',
  'symbol'
]);

const codes = {};

/**
 * Create a list string in the form like 'A and B' or 'A, B, ..., and Z'.
 * We cannot use Intl.ListFormat because it's not available in
 * --without-intl builds.
 *
 * @param {Array<string>} array
 *   An array of strings.
 * @param {string} [type]
 *   The list type to be inserted before the last element.
 * @returns {string}
 */
function formatList(array, type = 'and') {
  return array.length < 3
    ? array.join(` ${type} `)
    : `${array.slice(0, -1).join(', ')}, ${type} ${array[array.length - 1]}`
}

/** @type {Map<string, MessageFunction | string>} */
const messages = new Map();
const nodeInternalPrefix = '__node_internal_';
/** @type {number} */
let userStackTraceLimit;

codes.ERR_INVALID_ARG_TYPE = createError(
  'ERR_INVALID_ARG_TYPE',
  /**
   * @param {string} name
   * @param {Array<string> | string} expected
   * @param {unknown} actual
   */
  (name, expected, actual) => {
    assert.ok(typeof name === 'string', "'name' must be a string");
    if (!Array.isArray(expected)) {
      expected = [expected];
    }

    let message = 'The ';
    if (name.endsWith(' argument')) {
      // For cases like 'first argument'
      message += `${name} `;
    } else {
      const type = name.includes('.') ? 'property' : 'argument';
      message += `"${name}" ${type} `;
    }

    message += 'must be ';

    /** @type {Array<string>} */
    const types = [];
    /** @type {Array<string>} */
    const instances = [];
    /** @type {Array<string>} */
    const other = [];

    for (const value of expected) {
      assert.ok(
        typeof value === 'string',
        'All expected entries have to be of type string'
      );

      if (kTypes.has(value)) {
        types.push(value.toLowerCase());
      } else if (classRegExp.exec(value) === null) {
        assert.ok(
          value !== 'object',
          'The value "object" should be written as "Object"'
        );
        other.push(value);
      } else {
        instances.push(value);
      }
    }

    // Special handle `object` in case other instances are allowed to outline
    // the differences between each other.
    if (instances.length > 0) {
      const pos = types.indexOf('object');
      if (pos !== -1) {
        types.slice(pos, 1);
        instances.push('Object');
      }
    }

    if (types.length > 0) {
      message += `${types.length > 1 ? 'one of type' : 'of type'} ${formatList(
        types,
        'or'
      )}`;
      if (instances.length > 0 || other.length > 0) message += ' or ';
    }

    if (instances.length > 0) {
      message += `an instance of ${formatList(instances, 'or')}`;
      if (other.length > 0) message += ' or ';
    }

    if (other.length > 0) {
      if (other.length > 1) {
        message += `one of ${formatList(other, 'or')}`;
      } else {
        if (other[0].toLowerCase() !== other[0]) message += 'an ';
        message += `${other[0]}`;
      }
    }

    message += `. Received ${determineSpecificType(actual)}`;

    return message
  },
  TypeError
);

codes.ERR_INVALID_MODULE_SPECIFIER = createError(
  'ERR_INVALID_MODULE_SPECIFIER',
  /**
   * @param {string} request
   * @param {string} reason
   * @param {string} [base]
   */
  (request, reason, base = undefined) => {
    return `Invalid module "${request}" ${reason}${
      base ? ` imported from ${base}` : ''
    }`
  },
  TypeError
);

codes.ERR_INVALID_PACKAGE_CONFIG = createError(
  'ERR_INVALID_PACKAGE_CONFIG',
  /**
   * @param {string} path
   * @param {string} [base]
   * @param {string} [message]
   */
  (path, base, message) => {
    return `Invalid package config ${path}${
      base ? ` while importing ${base}` : ''
    }${message ? `. ${message}` : ''}`
  },
  Error
);

codes.ERR_INVALID_PACKAGE_TARGET = createError(
  'ERR_INVALID_PACKAGE_TARGET',
  /**
   * @param {string} packagePath
   * @param {string} key
   * @param {unknown} target
   * @param {boolean} [isImport=false]
   * @param {string} [base]
   */
  (packagePath, key, target, isImport = false, base = undefined) => {
    const relatedError =
      typeof target === 'string' &&
      !isImport &&
      target.length > 0 &&
      !target.startsWith('./');
    if (key === '.') {
      assert.ok(isImport === false);
      return (
        `Invalid "exports" main target ${JSON.stringify(target)} defined ` +
        `in the package config ${packagePath}package.json${
          base ? ` imported from ${base}` : ''
        }${relatedError ? '; targets must start with "./"' : ''}`
      )
    }

    return `Invalid "${
      isImport ? 'imports' : 'exports'
    }" target ${JSON.stringify(
      target
    )} defined for '${key}' in the package config ${packagePath}package.json${
      base ? ` imported from ${base}` : ''
    }${relatedError ? '; targets must start with "./"' : ''}`
  },
  Error
);

codes.ERR_MODULE_NOT_FOUND = createError(
  'ERR_MODULE_NOT_FOUND',
  /**
   * @param {string} path
   * @param {string} base
   * @param {boolean} [exactUrl]
   */
  (path, base, exactUrl = false) => {
    return `Cannot find ${
      exactUrl ? 'module' : 'package'
    } '${path}' imported from ${base}`
  },
  Error
);

codes.ERR_NETWORK_IMPORT_DISALLOWED = createError(
  'ERR_NETWORK_IMPORT_DISALLOWED',
  "import of '%s' by %s is not supported: %s",
  Error
);

codes.ERR_PACKAGE_IMPORT_NOT_DEFINED = createError(
  'ERR_PACKAGE_IMPORT_NOT_DEFINED',
  /**
   * @param {string} specifier
   * @param {string} packagePath
   * @param {string} base
   */
  (specifier, packagePath, base) => {
    return `Package import specifier "${specifier}" is not defined${
      packagePath ? ` in package ${packagePath}package.json` : ''
    } imported from ${base}`
  },
  TypeError
);

codes.ERR_PACKAGE_PATH_NOT_EXPORTED = createError(
  'ERR_PACKAGE_PATH_NOT_EXPORTED',
  /**
   * @param {string} packagePath
   * @param {string} subpath
   * @param {string} [base]
   */
  (packagePath, subpath, base = undefined) => {
    if (subpath === '.')
      return `No "exports" main defined in ${packagePath}package.json${
        base ? ` imported from ${base}` : ''
      }`
    return `Package subpath '${subpath}' is not defined by "exports" in ${packagePath}package.json${
      base ? ` imported from ${base}` : ''
    }`
  },
  Error
);

codes.ERR_UNSUPPORTED_DIR_IMPORT = createError(
  'ERR_UNSUPPORTED_DIR_IMPORT',
  "Directory import '%s' is not supported " +
    'resolving ES modules imported from %s',
  Error
);

codes.ERR_UNSUPPORTED_RESOLVE_REQUEST = createError(
  'ERR_UNSUPPORTED_RESOLVE_REQUEST',
  'Failed to resolve module specifier "%s" from "%s": Invalid relative URL or base scheme is not hierarchical.',
  TypeError
);

codes.ERR_UNKNOWN_FILE_EXTENSION = createError(
  'ERR_UNKNOWN_FILE_EXTENSION',
  /**
   * @param {string} extension
   * @param {string} path
   */
  (extension, path) => {
    return `Unknown file extension "${extension}" for ${path}`
  },
  TypeError
);

codes.ERR_INVALID_ARG_VALUE = createError(
  'ERR_INVALID_ARG_VALUE',
  /**
   * @param {string} name
   * @param {unknown} value
   * @param {string} [reason='is invalid']
   */
  (name, value, reason = 'is invalid') => {
    let inspected = inspect(value);

    if (inspected.length > 128) {
      inspected = `${inspected.slice(0, 128)}...`;
    }

    const type = name.includes('.') ? 'property' : 'argument';

    return `The ${type} '${name}' ${reason}. Received ${inspected}`
  },
  TypeError
  // Note: extra classes have been shaken out.
  // , RangeError
);

/**
 * Utility function for registering the error codes. Only used here. Exported
 * *only* to allow for testing.
 * @param {string} sym
 * @param {MessageFunction | string} value
 * @param {ErrorConstructor} constructor
 * @returns {new (...parameters: Array<any>) => Error}
 */
function createError(sym, value, constructor) {
  // Special case for SystemError that formats the error message differently
  // The SystemErrors only have SystemError as their base classes.
  messages.set(sym, value);

  return makeNodeErrorWithCode(constructor, sym)
}

/**
 * @param {ErrorConstructor} Base
 * @param {string} key
 * @returns {ErrorConstructor}
 */
function makeNodeErrorWithCode(Base, key) {
  // @ts-expect-error It’s a Node error.
  return NodeError
  /**
   * @param {Array<unknown>} parameters
   */
  function NodeError(...parameters) {
    const limit = Error.stackTraceLimit;
    if (isErrorStackTraceLimitWritable()) Error.stackTraceLimit = 0;
    const error = new Base();
    // Reset the limit and setting the name property.
    if (isErrorStackTraceLimitWritable()) Error.stackTraceLimit = limit;
    const message = getMessage(key, parameters, error);
    Object.defineProperties(error, {
      // Note: no need to implement `kIsNodeError` symbol, would be hard,
      // probably.
      message: {
        value: message,
        enumerable: false,
        writable: true,
        configurable: true
      },
      toString: {
        /** @this {Error} */
        value() {
          return `${this.name} [${key}]: ${this.message}`
        },
        enumerable: false,
        writable: true,
        configurable: true
      }
    });

    captureLargerStackTrace(error);
    // @ts-expect-error It’s a Node error.
    error.code = key;
    return error
  }
}

/**
 * @returns {boolean}
 */
function isErrorStackTraceLimitWritable() {
  // Do no touch Error.stackTraceLimit as V8 would attempt to install
  // it again during deserialization.
  try {
    if (v8.startupSnapshot.isBuildingSnapshot()) {
      return false
    }
  } catch {}

  const desc = Object.getOwnPropertyDescriptor(Error, 'stackTraceLimit');
  if (desc === undefined) {
    return Object.isExtensible(Error)
  }

  return own$1.call(desc, 'writable') && desc.writable !== undefined
    ? desc.writable
    : desc.set !== undefined
}

/**
 * This function removes unnecessary frames from Node.js core errors.
 * @template {(...parameters: unknown[]) => unknown} T
 * @param {T} wrappedFunction
 * @returns {T}
 */
function hideStackFrames(wrappedFunction) {
  // We rename the functions that will be hidden to cut off the stacktrace
  // at the outermost one
  const hidden = nodeInternalPrefix + wrappedFunction.name;
  Object.defineProperty(wrappedFunction, 'name', {value: hidden});
  return wrappedFunction
}

const captureLargerStackTrace = hideStackFrames(
  /**
   * @param {Error} error
   * @returns {Error}
   */
  // @ts-expect-error: fine
  function (error) {
    const stackTraceLimitIsWritable = isErrorStackTraceLimitWritable();
    if (stackTraceLimitIsWritable) {
      userStackTraceLimit = Error.stackTraceLimit;
      Error.stackTraceLimit = Number.POSITIVE_INFINITY;
    }

    Error.captureStackTrace(error);

    // Reset the limit
    if (stackTraceLimitIsWritable) Error.stackTraceLimit = userStackTraceLimit;

    return error
  }
);

/**
 * @param {string} key
 * @param {Array<unknown>} parameters
 * @param {Error} self
 * @returns {string}
 */
function getMessage(key, parameters, self) {
  const message = messages.get(key);
  assert.ok(message !== undefined, 'expected `message` to be found');

  if (typeof message === 'function') {
    assert.ok(
      message.length <= parameters.length, // Default options do not count.
      `Code: ${key}; The provided arguments length (${parameters.length}) does not ` +
        `match the required ones (${message.length}).`
    );
    return Reflect.apply(message, self, parameters)
  }

  const regex = /%[dfijoOs]/g;
  let expectedLength = 0;
  while (regex.exec(message) !== null) expectedLength++;
  assert.ok(
    expectedLength === parameters.length,
    `Code: ${key}; The provided arguments length (${parameters.length}) does not ` +
      `match the required ones (${expectedLength}).`
  );
  if (parameters.length === 0) return message

  parameters.unshift(message);
  return Reflect.apply(format, null, parameters)
}

/**
 * Determine the specific type of a value for type-mismatch errors.
 * @param {unknown} value
 * @returns {string}
 */
function determineSpecificType(value) {
  if (value === null || value === undefined) {
    return String(value)
  }

  if (typeof value === 'function' && value.name) {
    return `function ${value.name}`
  }

  if (typeof value === 'object') {
    if (value.constructor && value.constructor.name) {
      return `an instance of ${value.constructor.name}`
    }

    return `${inspect(value, {depth: -1})}`
  }

  let inspected = inspect(value, {colors: false});

  if (inspected.length > 28) {
    inspected = `${inspected.slice(0, 25)}...`;
  }

  return `type ${typeof value} (${inspected})`
}

// Manually “tree shaken” from:
// <https://github.com/nodejs/node/blob/7c3dce0/lib/internal/modules/package_json_reader.js>
// Last checked on: Apr 29, 2024.
// Removed the native dependency.
// Also: no need to cache, we do that in resolve already.


const hasOwnProperty$1 = {}.hasOwnProperty;

const {ERR_INVALID_PACKAGE_CONFIG: ERR_INVALID_PACKAGE_CONFIG$1} = codes;

/** @type {Map<string, PackageConfig>} */
const cache = new Map();

/**
 * @param {string} jsonPath
 * @param {{specifier: URL | string, base?: URL}} options
 * @returns {PackageConfig}
 */
function read(jsonPath, {base, specifier}) {
  const existing = cache.get(jsonPath);

  if (existing) {
    return existing
  }

  /** @type {string | undefined} */
  let string;

  try {
    string = fs.readFileSync(path.toNamespacedPath(jsonPath), 'utf8');
  } catch (error) {
    const exception = /** @type {ErrnoException} */ (error);

    if (exception.code !== 'ENOENT') {
      throw exception
    }
  }

  /** @type {PackageConfig} */
  const result = {
    exists: false,
    pjsonPath: jsonPath,
    main: undefined,
    name: undefined,
    type: 'none', // Ignore unknown types for forwards compatibility
    exports: undefined,
    imports: undefined
  };

  if (string !== undefined) {
    /** @type {Record<string, unknown>} */
    let parsed;

    try {
      parsed = JSON.parse(string);
    } catch (error_) {
      const cause = /** @type {ErrnoException} */ (error_);
      const error = new ERR_INVALID_PACKAGE_CONFIG$1(
        jsonPath,
        (base ? `"${specifier}" from ` : '') + fileURLToPath$1(base || specifier),
        cause.message
      );
      error.cause = cause;
      throw error
    }

    result.exists = true;

    if (
      hasOwnProperty$1.call(parsed, 'name') &&
      typeof parsed.name === 'string'
    ) {
      result.name = parsed.name;
    }

    if (
      hasOwnProperty$1.call(parsed, 'main') &&
      typeof parsed.main === 'string'
    ) {
      result.main = parsed.main;
    }

    if (hasOwnProperty$1.call(parsed, 'exports')) {
      // @ts-expect-error: assume valid.
      result.exports = parsed.exports;
    }

    if (hasOwnProperty$1.call(parsed, 'imports')) {
      // @ts-expect-error: assume valid.
      result.imports = parsed.imports;
    }

    // Ignore unknown types for forwards compatibility
    if (
      hasOwnProperty$1.call(parsed, 'type') &&
      (parsed.type === 'commonjs' || parsed.type === 'module')
    ) {
      result.type = parsed.type;
    }
  }

  cache.set(jsonPath, result);

  return result
}

/**
 * @param {URL | string} resolved
 * @returns {PackageConfig}
 */
function getPackageScopeConfig(resolved) {
  // Note: in Node, this is now a native module.
  let packageJSONUrl = new URL('package.json', resolved);

  while (true) {
    const packageJSONPath = packageJSONUrl.pathname;
    if (packageJSONPath.endsWith('node_modules/package.json')) {
      break
    }

    const packageConfig = read(fileURLToPath$1(packageJSONUrl), {
      specifier: resolved
    });

    if (packageConfig.exists) {
      return packageConfig
    }

    const lastPackageJSONUrl = packageJSONUrl;
    packageJSONUrl = new URL('../package.json', packageJSONUrl);

    // Terminates at root where ../package.json equals ../../package.json
    // (can't just check "/package.json" for Windows support).
    if (packageJSONUrl.pathname === lastPackageJSONUrl.pathname) {
      break
    }
  }

  const packageJSONPath = fileURLToPath$1(packageJSONUrl);
  // ^^ Note: in Node, this is now a native module.

  return {
    pjsonPath: packageJSONPath,
    exists: false,
    type: 'none'
  }
}

/**
 * Returns the package type for a given URL.
 * @param {URL} url - The URL to get the package type for.
 * @returns {PackageType}
 */
function getPackageType(url) {
  // To do @anonrig: Write a C++ function that returns only "type".
  return getPackageScopeConfig(url).type
}

// Manually “tree shaken” from:
// <https://github.com/nodejs/node/blob/7c3dce0/lib/internal/modules/esm/get_format.js>
// Last checked on: Apr 29, 2024.


const {ERR_UNKNOWN_FILE_EXTENSION} = codes;

const hasOwnProperty = {}.hasOwnProperty;

/** @type {Record<string, string>} */
const extensionFormatMap = {
  // @ts-expect-error: hush.
  __proto__: null,
  '.cjs': 'commonjs',
  '.js': 'module',
  '.json': 'json',
  '.mjs': 'module'
};

/**
 * @param {string | null} mime
 * @returns {string | null}
 */
function mimeToFormat(mime) {
  if (
    mime &&
    /\s*(text|application)\/javascript\s*(;\s*charset=utf-?8\s*)?/i.test(mime)
  )
    return 'module'
  if (mime === 'application/json') return 'json'
  return null
}

/**
 * @callback ProtocolHandler
 * @param {URL} parsed
 * @param {{parentURL: string, source?: Buffer}} context
 * @param {boolean} ignoreErrors
 * @returns {string | null | void}
 */

/**
 * @type {Record<string, ProtocolHandler>}
 */
const protocolHandlers = {
  // @ts-expect-error: hush.
  __proto__: null,
  'data:': getDataProtocolModuleFormat,
  'file:': getFileProtocolModuleFormat,
  'http:': getHttpProtocolModuleFormat,
  'https:': getHttpProtocolModuleFormat,
  'node:'() {
    return 'builtin'
  }
};

/**
 * @param {URL} parsed
 */
function getDataProtocolModuleFormat(parsed) {
  const {1: mime} = /^([^/]+\/[^;,]+)[^,]*?(;base64)?,/.exec(
    parsed.pathname
  ) || [null, null, null];
  return mimeToFormat(mime)
}

/**
 * Returns the file extension from a URL.
 *
 * Should give similar result to
 * `require('node:path').extname(require('node:url').fileURLToPath(url))`
 * when used with a `file:` URL.
 *
 * @param {URL} url
 * @returns {string}
 */
function extname(url) {
  const pathname = url.pathname;
  let index = pathname.length;

  while (index--) {
    const code = pathname.codePointAt(index);

    if (code === 47 /* `/` */) {
      return ''
    }

    if (code === 46 /* `.` */) {
      return pathname.codePointAt(index - 1) === 47 /* `/` */
        ? ''
        : pathname.slice(index)
    }
  }

  return ''
}

/**
 * @type {ProtocolHandler}
 */
function getFileProtocolModuleFormat(url, _context, ignoreErrors) {
  const value = extname(url);

  if (value === '.js') {
    const packageType = getPackageType(url);

    if (packageType !== 'none') {
      return packageType
    }

    return 'commonjs'
  }

  if (value === '') {
    const packageType = getPackageType(url);

    // Legacy behavior
    if (packageType === 'none' || packageType === 'commonjs') {
      return 'commonjs'
    }

    // Note: we don’t implement WASM, so we don’t need
    // `getFormatOfExtensionlessFile` from `formats`.
    return 'module'
  }

  const format = extensionFormatMap[value];
  if (format) return format

  // Explicit undefined return indicates load hook should rerun format check
  if (ignoreErrors) {
    return undefined
  }

  const filepath = fileURLToPath$1(url);
  throw new ERR_UNKNOWN_FILE_EXTENSION(value, filepath)
}

function getHttpProtocolModuleFormat() {
  // To do: HTTPS imports.
}

/**
 * @param {URL} url
 * @param {{parentURL: string}} context
 * @returns {string | null}
 */
function defaultGetFormatWithoutErrors(url, context) {
  const protocol = url.protocol;

  if (!hasOwnProperty.call(protocolHandlers, protocol)) {
    return null
  }

  return protocolHandlers[protocol](url, context, true) || null
}

// Manually “tree shaken” from:
// <https://github.com/nodejs/node/blob/81a9a97/lib/internal/modules/esm/utils.js>
// Last checked on: Apr 29, 2024.


// In Node itself these values are populated from CLI arguments, before any
// user code runs.
// Here we just define the defaults.
const DEFAULT_CONDITIONS = Object.freeze(['node', 'import']);
const DEFAULT_CONDITIONS_SET$1 = new Set(DEFAULT_CONDITIONS);

/**
 * Returns the default conditions for ES module loading, as a Set.
 */
function getDefaultConditionsSet() {
  return DEFAULT_CONDITIONS_SET$1
}

/**
 * @param {Array<string>} [conditions]
 * @returns {Set<string>}
 */
function getConditionsSet(conditions) {

  return getDefaultConditionsSet()
}

// Manually “tree shaken” from:
// <https://github.com/nodejs/node/blob/81a9a97/lib/internal/modules/esm/resolve.js>
// Last checked on: Apr 29, 2024.


const RegExpPrototypeSymbolReplace = RegExp.prototype[Symbol.replace];

const {
  ERR_INVALID_MODULE_SPECIFIER,
  ERR_INVALID_PACKAGE_CONFIG,
  ERR_INVALID_PACKAGE_TARGET,
  ERR_MODULE_NOT_FOUND,
  ERR_PACKAGE_IMPORT_NOT_DEFINED,
  ERR_PACKAGE_PATH_NOT_EXPORTED,
  ERR_UNSUPPORTED_DIR_IMPORT,
  ERR_UNSUPPORTED_RESOLVE_REQUEST
} = codes;

const own = {}.hasOwnProperty;

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))?(\\|\/|$)/i;
const deprecatedInvalidSegmentRegEx =
  /(^|\\|\/)((\.|%2e)(\.|%2e)?|(n|%6e|%4e)(o|%6f|%4f)(d|%64|%44)(e|%65|%45)(_|%5f)(m|%6d|%4d)(o|%6f|%4f)(d|%64|%44)(u|%75|%55)(l|%6c|%4c)(e|%65|%45)(s|%73|%53))(\\|\/|$)/i;
const invalidPackageNameRegEx = /^\.|%|\\/;
const patternRegEx = /\*/g;
const encodedSeparatorRegEx = /%2f|%5c/i;
/** @type {Set<string>} */
const emittedPackageWarnings = new Set();

const doubleSlashRegEx = /[/\\]{2}/;

/**
 *
 * @param {string} target
 * @param {string} request
 * @param {string} match
 * @param {URL} packageJsonUrl
 * @param {boolean} internal
 * @param {URL} base
 * @param {boolean} isTarget
 */
function emitInvalidSegmentDeprecation(
  target,
  request,
  match,
  packageJsonUrl,
  internal,
  base,
  isTarget
) {
  // @ts-expect-error: apparently it does exist, TS.
  if (process$1.noDeprecation) {
    return
  }

  const pjsonPath = fileURLToPath$1(packageJsonUrl);
  const double = doubleSlashRegEx.exec(isTarget ? target : request) !== null;
  process$1.emitWarning(
    `Use of deprecated ${
      double ? 'double slash' : 'leading or trailing slash matching'
    } resolving "${target}" for module ` +
      `request "${request}" ${
        request === match ? '' : `matched to "${match}" `
      }in the "${
        internal ? 'imports' : 'exports'
      }" field module resolution of the package at ${pjsonPath}${
        base ? ` imported from ${fileURLToPath$1(base)}` : ''
      }.`,
    'DeprecationWarning',
    'DEP0166'
  );
}

/**
 * @param {URL} url
 * @param {URL} packageJsonUrl
 * @param {URL} base
 * @param {string} [main]
 * @returns {void}
 */
function emitLegacyIndexDeprecation(url, packageJsonUrl, base, main) {
  // @ts-expect-error: apparently it does exist, TS.
  if (process$1.noDeprecation) {
    return
  }

  const format = defaultGetFormatWithoutErrors(url, {parentURL: base.href});
  if (format !== 'module') return
  const urlPath = fileURLToPath$1(url.href);
  const packagePath = fileURLToPath$1(new URL('.', packageJsonUrl));
  const basePath = fileURLToPath$1(base);
  if (!main) {
    process$1.emitWarning(
      `No "main" or "exports" field defined in the package.json for ${packagePath} resolving the main entry point "${urlPath.slice(
        packagePath.length
      )}", imported from ${basePath}.\nDefault "index" lookups for the main are deprecated for ES modules.`,
      'DeprecationWarning',
      'DEP0151'
    );
  } else if (path.resolve(packagePath, main) !== urlPath) {
    process$1.emitWarning(
      `Package ${packagePath} has a "main" field set to "${main}", ` +
        `excluding the full filename and extension to the resolved file at "${urlPath.slice(
          packagePath.length
        )}", imported from ${basePath}.\n Automatic extension resolution of the "main" field is ` +
        'deprecated for ES modules.',
      'DeprecationWarning',
      'DEP0151'
    );
  }
}

/**
 * @param {string} path
 * @returns {Stats | undefined}
 */
function tryStatSync(path) {
  // Note: from Node 15 onwards we can use `throwIfNoEntry: false` instead.
  try {
    return statSync(path)
  } catch {
    // Note: in Node code this returns `new Stats`,
    // but in Node 22 that’s marked as a deprecated internal API.
    // Which, well, we kinda are, but still to prevent that warning,
    // just yield `undefined`.
  }
}

/**
 * Legacy CommonJS main resolution:
 * 1. let M = pkg_url + (json main field)
 * 2. TRY(M, M.js, M.json, M.node)
 * 3. TRY(M/index.js, M/index.json, M/index.node)
 * 4. TRY(pkg_url/index.js, pkg_url/index.json, pkg_url/index.node)
 * 5. NOT_FOUND
 *
 * @param {URL} url
 * @returns {boolean}
 */
function fileExists(url) {
  const stats = statSync(url, {throwIfNoEntry: false});
  const isFile = stats ? stats.isFile() : undefined;
  return isFile === null || isFile === undefined ? false : isFile
}

/**
 * @param {URL} packageJsonUrl
 * @param {PackageConfig} packageConfig
 * @param {URL} base
 * @returns {URL}
 */
function legacyMainResolve(packageJsonUrl, packageConfig, base) {
  /** @type {URL | undefined} */
  let guess;
  if (packageConfig.main !== undefined) {
    guess = new URL(packageConfig.main, packageJsonUrl);
    // Note: fs check redundances will be handled by Descriptor cache here.
    if (fileExists(guess)) return guess

    const tries = [
      `./${packageConfig.main}.js`,
      `./${packageConfig.main}.json`,
      `./${packageConfig.main}.node`,
      `./${packageConfig.main}/index.js`,
      `./${packageConfig.main}/index.json`,
      `./${packageConfig.main}/index.node`
    ];
    let i = -1;

    while (++i < tries.length) {
      guess = new URL(tries[i], packageJsonUrl);
      if (fileExists(guess)) break
      guess = undefined;
    }

    if (guess) {
      emitLegacyIndexDeprecation(
        guess,
        packageJsonUrl,
        base,
        packageConfig.main
      );
      return guess
    }
    // Fallthrough.
  }

  const tries = ['./index.js', './index.json', './index.node'];
  let i = -1;

  while (++i < tries.length) {
    guess = new URL(tries[i], packageJsonUrl);
    if (fileExists(guess)) break
    guess = undefined;
  }

  if (guess) {
    emitLegacyIndexDeprecation(guess, packageJsonUrl, base, packageConfig.main);
    return guess
  }

  // Not found.
  throw new ERR_MODULE_NOT_FOUND(
    fileURLToPath$1(new URL('.', packageJsonUrl)),
    fileURLToPath$1(base)
  )
}

/**
 * @param {URL} resolved
 * @param {URL} base
 * @param {boolean} [preserveSymlinks]
 * @returns {URL}
 */
function finalizeResolution(resolved, base, preserveSymlinks) {
  if (encodedSeparatorRegEx.exec(resolved.pathname) !== null) {
    throw new ERR_INVALID_MODULE_SPECIFIER(
      resolved.pathname,
      'must not include encoded "/" or "\\" characters',
      fileURLToPath$1(base)
    )
  }

  /** @type {string} */
  let filePath;

  try {
    filePath = fileURLToPath$1(resolved);
  } catch (error) {
    const cause = /** @type {ErrnoException} */ (error);
    Object.defineProperty(cause, 'input', {value: String(resolved)});
    Object.defineProperty(cause, 'module', {value: String(base)});
    throw cause
  }

  const stats = tryStatSync(
    filePath.endsWith('/') ? filePath.slice(-1) : filePath
  );

  if (stats && stats.isDirectory()) {
    const error = new ERR_UNSUPPORTED_DIR_IMPORT(filePath, fileURLToPath$1(base));
    // @ts-expect-error Add this for `import.meta.resolve`.
    error.url = String(resolved);
    throw error
  }

  if (!stats || !stats.isFile()) {
    const error = new ERR_MODULE_NOT_FOUND(
      filePath || resolved.pathname,
      base && fileURLToPath$1(base),
      true
    );
    // @ts-expect-error Add this for `import.meta.resolve`.
    error.url = String(resolved);
    throw error
  }

  {
    const real = realpathSync(filePath);
    const {search, hash} = resolved;
    resolved = pathToFileURL$1(real + (filePath.endsWith(path.sep) ? '/' : ''));
    resolved.search = search;
    resolved.hash = hash;
  }

  return resolved
}

/**
 * @param {string} specifier
 * @param {URL | undefined} packageJsonUrl
 * @param {URL} base
 * @returns {Error}
 */
function importNotDefined(specifier, packageJsonUrl, base) {
  return new ERR_PACKAGE_IMPORT_NOT_DEFINED(
    specifier,
    packageJsonUrl && fileURLToPath$1(new URL('.', packageJsonUrl)),
    fileURLToPath$1(base)
  )
}

/**
 * @param {string} subpath
 * @param {URL} packageJsonUrl
 * @param {URL} base
 * @returns {Error}
 */
function exportsNotFound(subpath, packageJsonUrl, base) {
  return new ERR_PACKAGE_PATH_NOT_EXPORTED(
    fileURLToPath$1(new URL('.', packageJsonUrl)),
    subpath,
    base && fileURLToPath$1(base)
  )
}

/**
 * @param {string} request
 * @param {string} match
 * @param {URL} packageJsonUrl
 * @param {boolean} internal
 * @param {URL} [base]
 * @returns {never}
 */
function throwInvalidSubpath(request, match, packageJsonUrl, internal, base) {
  const reason = `request is not a valid match in pattern "${match}" for the "${
    internal ? 'imports' : 'exports'
  }" resolution of ${fileURLToPath$1(packageJsonUrl)}`;
  throw new ERR_INVALID_MODULE_SPECIFIER(
    request,
    reason,
    base && fileURLToPath$1(base)
  )
}

/**
 * @param {string} subpath
 * @param {unknown} target
 * @param {URL} packageJsonUrl
 * @param {boolean} internal
 * @param {URL} [base]
 * @returns {Error}
 */
function invalidPackageTarget(subpath, target, packageJsonUrl, internal, base) {
  target =
    typeof target === 'object' && target !== null
      ? JSON.stringify(target, null, '')
      : `${target}`;

  return new ERR_INVALID_PACKAGE_TARGET(
    fileURLToPath$1(new URL('.', packageJsonUrl)),
    subpath,
    target,
    internal,
    base && fileURLToPath$1(base)
  )
}

/**
 * @param {string} target
 * @param {string} subpath
 * @param {string} match
 * @param {URL} packageJsonUrl
 * @param {URL} base
 * @param {boolean} pattern
 * @param {boolean} internal
 * @param {boolean} isPathMap
 * @param {Set<string> | undefined} conditions
 * @returns {URL}
 */
function resolvePackageTargetString(
  target,
  subpath,
  match,
  packageJsonUrl,
  base,
  pattern,
  internal,
  isPathMap,
  conditions
) {
  if (subpath !== '' && !pattern && target[target.length - 1] !== '/')
    throw invalidPackageTarget(match, target, packageJsonUrl, internal, base)

  if (!target.startsWith('./')) {
    if (internal && !target.startsWith('../') && !target.startsWith('/')) {
      let isURL = false;

      try {
        new URL(target);
        isURL = true;
      } catch {
        // Continue regardless of error.
      }

      if (!isURL) {
        const exportTarget = pattern
          ? RegExpPrototypeSymbolReplace.call(
              patternRegEx,
              target,
              () => subpath
            )
          : target + subpath;

        return packageResolve(exportTarget, packageJsonUrl, conditions)
      }
    }

    throw invalidPackageTarget(match, target, packageJsonUrl, internal, base)
  }

  if (invalidSegmentRegEx.exec(target.slice(2)) !== null) {
    if (deprecatedInvalidSegmentRegEx.exec(target.slice(2)) === null) {
      if (!isPathMap) {
        const request = pattern
          ? match.replace('*', () => subpath)
          : match + subpath;
        const resolvedTarget = pattern
          ? RegExpPrototypeSymbolReplace.call(
              patternRegEx,
              target,
              () => subpath
            )
          : target;
        emitInvalidSegmentDeprecation(
          resolvedTarget,
          request,
          match,
          packageJsonUrl,
          internal,
          base,
          true
        );
      }
    } else {
      throw invalidPackageTarget(match, target, packageJsonUrl, internal, base)
    }
  }

  const resolved = new URL(target, packageJsonUrl);
  const resolvedPath = resolved.pathname;
  const packagePath = new URL('.', packageJsonUrl).pathname;

  if (!resolvedPath.startsWith(packagePath))
    throw invalidPackageTarget(match, target, packageJsonUrl, internal, base)

  if (subpath === '') return resolved

  if (invalidSegmentRegEx.exec(subpath) !== null) {
    const request = pattern
      ? match.replace('*', () => subpath)
      : match + subpath;
    if (deprecatedInvalidSegmentRegEx.exec(subpath) === null) {
      if (!isPathMap) {
        const resolvedTarget = pattern
          ? RegExpPrototypeSymbolReplace.call(
              patternRegEx,
              target,
              () => subpath
            )
          : target;
        emitInvalidSegmentDeprecation(
          resolvedTarget,
          request,
          match,
          packageJsonUrl,
          internal,
          base,
          false
        );
      }
    } else {
      throwInvalidSubpath(request, match, packageJsonUrl, internal, base);
    }
  }

  if (pattern) {
    return new URL(
      RegExpPrototypeSymbolReplace.call(
        patternRegEx,
        resolved.href,
        () => subpath
      )
    )
  }

  return new URL(subpath, resolved)
}

/**
 * @param {string} key
 * @returns {boolean}
 */
function isArrayIndex(key) {
  const keyNumber = Number(key);
  if (`${keyNumber}` !== key) return false
  return keyNumber >= 0 && keyNumber < 0xff_ff_ff_ff
}

/**
 * @param {URL} packageJsonUrl
 * @param {unknown} target
 * @param {string} subpath
 * @param {string} packageSubpath
 * @param {URL} base
 * @param {boolean} pattern
 * @param {boolean} internal
 * @param {boolean} isPathMap
 * @param {Set<string> | undefined} conditions
 * @returns {URL | null}
 */
function resolvePackageTarget(
  packageJsonUrl,
  target,
  subpath,
  packageSubpath,
  base,
  pattern,
  internal,
  isPathMap,
  conditions
) {
  if (typeof target === 'string') {
    return resolvePackageTargetString(
      target,
      subpath,
      packageSubpath,
      packageJsonUrl,
      base,
      pattern,
      internal,
      isPathMap,
      conditions
    )
  }

  if (Array.isArray(target)) {
    /** @type {Array<unknown>} */
    const targetList = target;
    if (targetList.length === 0) return null

    /** @type {ErrnoException | null | undefined} */
    let lastException;
    let i = -1;

    while (++i < targetList.length) {
      const targetItem = targetList[i];
      /** @type {URL | null} */
      let resolveResult;
      try {
        resolveResult = resolvePackageTarget(
          packageJsonUrl,
          targetItem,
          subpath,
          packageSubpath,
          base,
          pattern,
          internal,
          isPathMap,
          conditions
        );
      } catch (error) {
        const exception = /** @type {ErrnoException} */ (error);
        lastException = exception;
        if (exception.code === 'ERR_INVALID_PACKAGE_TARGET') continue
        throw error
      }

      if (resolveResult === undefined) continue

      if (resolveResult === null) {
        lastException = null;
        continue
      }

      return resolveResult
    }

    if (lastException === undefined || lastException === null) {
      return null
    }

    throw lastException
  }

  if (typeof target === 'object' && target !== null) {
    const keys = Object.getOwnPropertyNames(target);
    let i = -1;

    while (++i < keys.length) {
      const key = keys[i];
      if (isArrayIndex(key)) {
        throw new ERR_INVALID_PACKAGE_CONFIG(
          fileURLToPath$1(packageJsonUrl),
          base,
          '"exports" cannot contain numeric property keys.'
        )
      }
    }

    i = -1;

    while (++i < keys.length) {
      const key = keys[i];
      if (key === 'default' || (conditions && conditions.has(key))) {
        // @ts-expect-error: indexable.
        const conditionalTarget = /** @type {unknown} */ (target[key]);
        const resolveResult = resolvePackageTarget(
          packageJsonUrl,
          conditionalTarget,
          subpath,
          packageSubpath,
          base,
          pattern,
          internal,
          isPathMap,
          conditions
        );
        if (resolveResult === undefined) continue
        return resolveResult
      }
    }

    return null
  }

  if (target === null) {
    return null
  }

  throw invalidPackageTarget(
    packageSubpath,
    target,
    packageJsonUrl,
    internal,
    base
  )
}

/**
 * @param {unknown} exports
 * @param {URL} packageJsonUrl
 * @param {URL} base
 * @returns {boolean}
 */
function isConditionalExportsMainSugar(exports$1, packageJsonUrl, base) {
  if (typeof exports$1 === 'string' || Array.isArray(exports$1)) return true
  if (typeof exports$1 !== 'object' || exports$1 === null) return false

  const keys = Object.getOwnPropertyNames(exports$1);
  let isConditionalSugar = false;
  let i = 0;
  let keyIndex = -1;
  while (++keyIndex < keys.length) {
    const key = keys[keyIndex];
    const currentIsConditionalSugar = key === '' || key[0] !== '.';
    if (i++ === 0) {
      isConditionalSugar = currentIsConditionalSugar;
    } else if (isConditionalSugar !== currentIsConditionalSugar) {
      throw new ERR_INVALID_PACKAGE_CONFIG(
        fileURLToPath$1(packageJsonUrl),
        base,
        '"exports" cannot contain some keys starting with \'.\' and some not.' +
          ' The exports object must either be an object of package subpath keys' +
          ' or an object of main entry condition name keys only.'
      )
    }
  }

  return isConditionalSugar
}

/**
 * @param {string} match
 * @param {URL} pjsonUrl
 * @param {URL} base
 */
function emitTrailingSlashPatternDeprecation(match, pjsonUrl, base) {
  // @ts-expect-error: apparently it does exist, TS.
  if (process$1.noDeprecation) {
    return
  }

  const pjsonPath = fileURLToPath$1(pjsonUrl);
  if (emittedPackageWarnings.has(pjsonPath + '|' + match)) return
  emittedPackageWarnings.add(pjsonPath + '|' + match);
  process$1.emitWarning(
    `Use of deprecated trailing slash pattern mapping "${match}" in the ` +
      `"exports" field module resolution of the package at ${pjsonPath}${
        base ? ` imported from ${fileURLToPath$1(base)}` : ''
      }. Mapping specifiers ending in "/" is no longer supported.`,
    'DeprecationWarning',
    'DEP0155'
  );
}

/**
 * @param {URL} packageJsonUrl
 * @param {string} packageSubpath
 * @param {Record<string, unknown>} packageConfig
 * @param {URL} base
 * @param {Set<string> | undefined} conditions
 * @returns {URL}
 */
function packageExportsResolve(
  packageJsonUrl,
  packageSubpath,
  packageConfig,
  base,
  conditions
) {
  let exports$1 = packageConfig.exports;

  if (isConditionalExportsMainSugar(exports$1, packageJsonUrl, base)) {
    exports$1 = {'.': exports$1};
  }

  if (
    own.call(exports$1, packageSubpath) &&
    !packageSubpath.includes('*') &&
    !packageSubpath.endsWith('/')
  ) {
    // @ts-expect-error: indexable.
    const target = exports$1[packageSubpath];
    const resolveResult = resolvePackageTarget(
      packageJsonUrl,
      target,
      '',
      packageSubpath,
      base,
      false,
      false,
      false,
      conditions
    );
    if (resolveResult === null || resolveResult === undefined) {
      throw exportsNotFound(packageSubpath, packageJsonUrl, base)
    }

    return resolveResult
  }

  let bestMatch = '';
  let bestMatchSubpath = '';
  const keys = Object.getOwnPropertyNames(exports$1);
  let i = -1;

  while (++i < keys.length) {
    const key = keys[i];
    const patternIndex = key.indexOf('*');

    if (
      patternIndex !== -1 &&
      packageSubpath.startsWith(key.slice(0, patternIndex))
    ) {
      // When this reaches EOL, this can throw at the top of the whole function:
      //
      // if (StringPrototypeEndsWith(packageSubpath, '/'))
      //   throwInvalidSubpath(packageSubpath)
      //
      // To match "imports" and the spec.
      if (packageSubpath.endsWith('/')) {
        emitTrailingSlashPatternDeprecation(
          packageSubpath,
          packageJsonUrl,
          base
        );
      }

      const patternTrailer = key.slice(patternIndex + 1);

      if (
        packageSubpath.length >= key.length &&
        packageSubpath.endsWith(patternTrailer) &&
        patternKeyCompare(bestMatch, key) === 1 &&
        key.lastIndexOf('*') === patternIndex
      ) {
        bestMatch = key;
        bestMatchSubpath = packageSubpath.slice(
          patternIndex,
          packageSubpath.length - patternTrailer.length
        );
      }
    }
  }

  if (bestMatch) {
    // @ts-expect-error: indexable.
    const target = /** @type {unknown} */ (exports$1[bestMatch]);
    const resolveResult = resolvePackageTarget(
      packageJsonUrl,
      target,
      bestMatchSubpath,
      bestMatch,
      base,
      true,
      false,
      packageSubpath.endsWith('/'),
      conditions
    );

    if (resolveResult === null || resolveResult === undefined) {
      throw exportsNotFound(packageSubpath, packageJsonUrl, base)
    }

    return resolveResult
  }

  throw exportsNotFound(packageSubpath, packageJsonUrl, base)
}

/**
 * @param {string} a
 * @param {string} b
 */
function patternKeyCompare(a, b) {
  const aPatternIndex = a.indexOf('*');
  const bPatternIndex = b.indexOf('*');
  const baseLengthA = aPatternIndex === -1 ? a.length : aPatternIndex + 1;
  const baseLengthB = bPatternIndex === -1 ? b.length : bPatternIndex + 1;
  if (baseLengthA > baseLengthB) return -1
  if (baseLengthB > baseLengthA) return 1
  if (aPatternIndex === -1) return 1
  if (bPatternIndex === -1) return -1
  if (a.length > b.length) return -1
  if (b.length > a.length) return 1
  return 0
}

/**
 * @param {string} name
 * @param {URL} base
 * @param {Set<string>} [conditions]
 * @returns {URL}
 */
function packageImportsResolve(name, base, conditions) {
  if (name === '#' || name.startsWith('#/') || name.endsWith('/')) {
    const reason = 'is not a valid internal imports specifier name';
    throw new ERR_INVALID_MODULE_SPECIFIER(name, reason, fileURLToPath$1(base))
  }

  /** @type {URL | undefined} */
  let packageJsonUrl;

  const packageConfig = getPackageScopeConfig(base);

  if (packageConfig.exists) {
    packageJsonUrl = pathToFileURL$1(packageConfig.pjsonPath);
    const imports = packageConfig.imports;
    if (imports) {
      if (own.call(imports, name) && !name.includes('*')) {
        const resolveResult = resolvePackageTarget(
          packageJsonUrl,
          imports[name],
          '',
          name,
          base,
          false,
          true,
          false,
          conditions
        );
        if (resolveResult !== null && resolveResult !== undefined) {
          return resolveResult
        }
      } else {
        let bestMatch = '';
        let bestMatchSubpath = '';
        const keys = Object.getOwnPropertyNames(imports);
        let i = -1;

        while (++i < keys.length) {
          const key = keys[i];
          const patternIndex = key.indexOf('*');

          if (patternIndex !== -1 && name.startsWith(key.slice(0, -1))) {
            const patternTrailer = key.slice(patternIndex + 1);
            if (
              name.length >= key.length &&
              name.endsWith(patternTrailer) &&
              patternKeyCompare(bestMatch, key) === 1 &&
              key.lastIndexOf('*') === patternIndex
            ) {
              bestMatch = key;
              bestMatchSubpath = name.slice(
                patternIndex,
                name.length - patternTrailer.length
              );
            }
          }
        }

        if (bestMatch) {
          const target = imports[bestMatch];
          const resolveResult = resolvePackageTarget(
            packageJsonUrl,
            target,
            bestMatchSubpath,
            bestMatch,
            base,
            true,
            true,
            false,
            conditions
          );

          if (resolveResult !== null && resolveResult !== undefined) {
            return resolveResult
          }
        }
      }
    }
  }

  throw importNotDefined(name, packageJsonUrl, base)
}

/**
 * @param {string} specifier
 * @param {URL} base
 */
function parsePackageName(specifier, base) {
  let separatorIndex = specifier.indexOf('/');
  let validPackageName = true;
  let isScoped = false;
  if (specifier[0] === '@') {
    isScoped = true;
    if (separatorIndex === -1 || specifier.length === 0) {
      validPackageName = false;
    } else {
      separatorIndex = specifier.indexOf('/', separatorIndex + 1);
    }
  }

  const packageName =
    separatorIndex === -1 ? specifier : specifier.slice(0, separatorIndex);

  // Package name cannot have leading . and cannot have percent-encoding or
  // \\ separators.
  if (invalidPackageNameRegEx.exec(packageName) !== null) {
    validPackageName = false;
  }

  if (!validPackageName) {
    throw new ERR_INVALID_MODULE_SPECIFIER(
      specifier,
      'is not a valid package name',
      fileURLToPath$1(base)
    )
  }

  const packageSubpath =
    '.' + (separatorIndex === -1 ? '' : specifier.slice(separatorIndex));

  return {packageName, packageSubpath, isScoped}
}

/**
 * @param {string} specifier
 * @param {URL} base
 * @param {Set<string> | undefined} conditions
 * @returns {URL}
 */
function packageResolve(specifier, base, conditions) {
  if (builtinModules.includes(specifier)) {
    return new URL('node:' + specifier)
  }

  const {packageName, packageSubpath, isScoped} = parsePackageName(
    specifier,
    base
  );

  // ResolveSelf
  const packageConfig = getPackageScopeConfig(base);

  // Can’t test.
  /* c8 ignore next 16 */
  if (packageConfig.exists) {
    const packageJsonUrl = pathToFileURL$1(packageConfig.pjsonPath);
    if (
      packageConfig.name === packageName &&
      packageConfig.exports !== undefined &&
      packageConfig.exports !== null
    ) {
      return packageExportsResolve(
        packageJsonUrl,
        packageSubpath,
        packageConfig,
        base,
        conditions
      )
    }
  }

  let packageJsonUrl = new URL(
    './node_modules/' + packageName + '/package.json',
    base
  );
  let packageJsonPath = fileURLToPath$1(packageJsonUrl);
  /** @type {string} */
  let lastPath;
  do {
    const stat = tryStatSync(packageJsonPath.slice(0, -13));
    if (!stat || !stat.isDirectory()) {
      lastPath = packageJsonPath;
      packageJsonUrl = new URL(
        (isScoped ? '../../../../node_modules/' : '../../../node_modules/') +
          packageName +
          '/package.json',
        packageJsonUrl
      );
      packageJsonPath = fileURLToPath$1(packageJsonUrl);
      continue
    }

    // Package match.
    const packageConfig = read(packageJsonPath, {base, specifier});
    if (packageConfig.exports !== undefined && packageConfig.exports !== null) {
      return packageExportsResolve(
        packageJsonUrl,
        packageSubpath,
        packageConfig,
        base,
        conditions
      )
    }

    if (packageSubpath === '.') {
      return legacyMainResolve(packageJsonUrl, packageConfig, base)
    }

    return new URL(packageSubpath, packageJsonUrl)
    // Cross-platform root check.
  } while (packageJsonPath.length !== lastPath.length)

  throw new ERR_MODULE_NOT_FOUND(packageName, fileURLToPath$1(base), false)
}

/**
 * @param {string} specifier
 * @returns {boolean}
 */
function isRelativeSpecifier(specifier) {
  if (specifier[0] === '.') {
    if (specifier.length === 1 || specifier[1] === '/') return true
    if (
      specifier[1] === '.' &&
      (specifier.length === 2 || specifier[2] === '/')
    ) {