angular-cn/tools/build/webpack/promiseify.js

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var webpack = require('webpack');
/**
* Wraps the original `webpack` function to convert execution
* result to a promise and properly report errors.
*
* @param options
* @returns {Function}
*/
function webPackPromiseify(options) {
return new Promise(function (resolve, reject) {
webpack(options, function(err, stats) {
var jsonStats = stats.toJson() || {};
var statsErrors = jsonStats.errors || [];
if (err) {
return reject(err);
}
if (statsErrors.length) {
return reject(statsErrors);
}
return resolve(stats);
});
});
}
module.exports = webPackPromiseify;