nodejs-mobile-react-native/scripts/override-dlopen-paths-preload.js

Node.js for Mobile Apps React Native plugin

var fs = require('fs');
var path = require('path');

var substitutionDataFile = path.join(
  __dirname,
  'override-dlopen-paths-data.json',
);
// If the json file exists, override dlopen to load the specified framework paths instead.
if (fs.existsSync(substitutionDataFile)) {
  var pathSubstitutionData = JSON.parse(
    fs.readFileSync(substitutionDataFile, 'utf8'),
  );

  var pathSubstitutionDictionary = {};
  // Build a dictionary to convert paths at runtime, taking current sandboxed paths into account.
  for (let i = 0; i < pathSubstitutionData.length; i++) {
    pathSubstitutionDictionary[
      path.normalize(
        path.join.apply(
          null,
          [__dirname].concat(pathSubstitutionData[i].originalpath),
        ),
      )
    ] = path.normalize(
      path.join.apply(
        null,
        [__dirname].concat(pathSubstitutionData[i].newpath),
      ),
    );
  }

  var old_dlopen = process.dlopen;
  // Override process.dlopen
  process.dlopen = function (_module, _filename) {
    if (pathSubstitutionDictionary[path.normalize(_filename)]) {
      _filename = pathSubstitutionDictionary[path.normalize(_filename)];
    }
    old_dlopen(_module, _filename);
  };
}