broccoli-merge-trees/index.js

'use strict';

var Plugin = require('broccoli-plugin');
var MergeTrees = require('merge-trees');

module.exports = BroccoliMergeTrees;
BroccoliMergeTrees.prototype = Object.create(Plugin.prototype);
BroccoliMergeTrees.prototype.constructor = BroccoliMergeTrees;
function BroccoliMergeTrees(inputNodes, options) {
  if (!(this instanceof BroccoliMergeTrees)) return new BroccoliMergeTrees(inputNodes, options);
  options = options || {};
  var name = 'broccoli-merge-trees:' + (options.annotation || '');
  if (!Array.isArray(inputNodes)) {
    throw new TypeError(name + ': Expected array, got: [' + inputNodes +']');
  }
  Plugin.call(this, inputNodes, {
    persistentOutput: true,
    needsCache: false,
    annotation: options.annotation
  });
  this.options = options;
}

BroccoliMergeTrees.prototype.build = function() {
  if (this.mergeTrees == null) {
    // Defer instantiation until the first build because we only
    // have this.inputPaths and this.outputPath once we build.
    this.mergeTrees = new MergeTrees(this.inputPaths, this.outputPath, {
      overwrite: this.options.overwrite,
      annotation: this.options.annotation
    });
  }

  this.mergeTrees.merge();
};