emsdk/upstream/emscripten/src/lib/libnodepath.js

/**
 * @license
 * Copyright 2022 The Emscripten Authors
 * SPDX-License-Identifier: MIT
 */

// This implementation ensures that Windows-style paths are being
// used when running on a Windows operating system - see:
// https://nodejs.org/api/path.html#path_windows_vs_posix
// It's only used/needed when linking with `-sNODERAWFS`, as that
// will replace all normal filesystem access with direct Node.js
// operations. Hence, using `nodePath` should be safe here.

addToLibrary({
  $nodePath: "require('node:path')",
  $PATH__deps: ['$nodePath'],
  $PATH: `{
    isAbs: nodePath.isAbsolute,
    normalize: nodePath.normalize,
    dirname: nodePath.dirname,
    basename: nodePath.basename,
    join: nodePath.join,
    join2: nodePath.join,
  }`,
  // The FS-using parts are split out into a separate object, so simple path
  // usage does not require the FS.
  $PATH_FS__deps: ['$FS', '$nodePath'],
  $PATH_FS__docs: '/** @type{{resolve: function(...*)}} */',
  $PATH_FS: {
    resolve: (...paths) => {
      paths.unshift(FS.cwd());
      return nodePath.posix.resolve(...paths);
    },
    relative: (from, to) => nodePath.posix.relative(from || FS.cwd(), to || FS.cwd()),
  }
});