function collapseDependencies()

in packages/metro/src/ModuleGraph/worker/collectDependencies.js [590:620]

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

function collapseDependencies<TSplitCondition>(
  dependency: InternalDependency<TSplitCondition>,
  qualifier: ImportQualifier,
): InternalDependency<TSplitCondition> {
  let collapsed = dependency;

  // A previously optionally required dependency was required non-optionaly.
  // Mark it non optional for the whole module
  if (collapsed.isOptional && !qualifier.optional) {
    collapsed = {
      ...dependency,
      isOptional: false,
    };
  }

  // A previously asynchronously (or prefetch) required module was required synchronously.
  // Make the dependency sync.
  if (collapsed.asyncType != null && qualifier.asyncType == null) {
    collapsed = {...dependency, asyncType: null};
  }

  // A prefetched dependency was required async in the module. Mark it as async.
  if (collapsed.asyncType === 'prefetch' && qualifier.asyncType === 'async') {
    collapsed = {
      ...dependency,
      asyncType: 'async',
    };
  }

  return collapsed;
}