Function getEmptyTree

lib/broccoli/merge-trees.js:12–33

()

}

function getEmptyTree() {
  if (EMPTY_MERGE_TREE) {
    return EMPTY_MERGE_TREE;
  }

  EMPTY_MERGE_TREE = module.exports._upstreamMergeTrees([], {
    annotation: 'EMPTY_MERGE_TREE',
    description: 'EMPTY_MERGE_TREE',
  });

  let originalCleanup = EMPTY_MERGE_TREE.cleanup;
  EMPTY_MERGE_TREE.cleanup = function () {
    // this tree is being cleaned up, we must
    // ensure that our shared EMPTY_MERGE_TREE is
    // reset (otherwise it will not have a valid
    // `outputPath`)
    EMPTY_MERGE_TREE = null;
    return originalCleanup.apply(this, arguments);
  };

  return EMPTY_MERGE_TREE;
}

module.exports = function mergeTrees(_inputTrees, options) {
  options = options || {};