function resolveHasteName()

in packages/metro-resolver/src/resolve.js [168:196]

• 29 lines of code
• 7 McCabe index (conditional complexity)

function resolveHasteName(
  context: HasteContext,
  moduleName: string,
  platform: string | null,
): Result<Resolution, void> {
  const modulePath = context.resolveHasteModule(moduleName);
  if (modulePath != null) {
    return resolvedAs({type: 'sourceFile', filePath: modulePath});
  }
  let packageName = moduleName;
  let packageJsonPath = context.resolveHastePackage(packageName);
  while (packageJsonPath == null && packageName && packageName !== '.') {
    packageName = path.dirname(packageName);
    packageJsonPath = context.resolveHastePackage(packageName);
  }
  if (packageJsonPath == null) {
    return failedFor();
  }
  const packageDirPath = path.dirname(packageJsonPath);
  const pathInModule = moduleName.substring(packageName.length + 1);
  const potentialModulePath = path.join(packageDirPath, pathInModule);
  const result = resolveFileOrDir(context, potentialModulePath, platform);
  if (result.type === 'resolved') {
    return result;
  }
  const {candidates} = result;
  const opts = {moduleName, packageName, pathInModule, candidates};
  throw new MissingFileInHastePackageError(opts);
}