obj2gltf/lib/readLines.js

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JavaScript
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2017-03-13 15:28:51 -04:00
'use strict';
var eventStream = require('event-stream');
var fsExtra = require('fs-extra');
var Promise = require('bluebird');
module.exports = readLines;
/**
* Read a file line-by-line.
*
* @param {String} path Path to the file.
* @param {Function} callback Function to call when reading each line.
* @returns {Promise} A promise when the reader is finished.
*
* @private
*/
function readLines(path, callback) {
return new Promise(function(resolve, reject) {
fsExtra.createReadStream(path)
.on('error', reject)
.on('end', resolve)
.pipe(eventStream.split())
.pipe(eventStream.mapSync(function (line) {
callback(line);
}));
});
}