86 lines
2.1 KiB
JavaScript
86 lines
2.1 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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'use strict';
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const filterPlatformAssetScales = require('./filterPlatformAssetScales');
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const fs = require('fs');
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const getAssetDestPathAndroid = require('./getAssetDestPathAndroid');
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const getAssetDestPathIOS = require('./getAssetDestPathIOS');
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const log = require('../util/log').out('bundle');
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const mkdirp = require('mkdirp');
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const path = require('path');
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function saveAssets(
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assets,
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platform,
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assetsDest
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) {
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if (!assetsDest) {
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console.warn('Assets destination folder is not set, skipping...');
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return Promise.resolve();
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}
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const getAssetDestPath = platform === 'android'
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? getAssetDestPathAndroid
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: getAssetDestPathIOS;
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const filesToCopy = Object.create(null); // Map src -> dest
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assets
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.forEach(asset => {
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const validScales = new Set(filterPlatformAssetScales(platform, asset.scales));
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asset.scales.forEach((scale, idx) => {
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if (!validScales.has(scale)) {
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return;
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}
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const src = asset.files[idx];
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const dest = path.join(assetsDest, getAssetDestPath(asset, scale));
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filesToCopy[src] = dest;
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});
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});
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return copyAll(filesToCopy);
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}
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function copyAll(filesToCopy) {
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const queue = Object.keys(filesToCopy);
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if (queue.length === 0) {
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return Promise.resolve();
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}
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log('Copying ' + queue.length + ' asset files');
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return new Promise((resolve, reject) => {
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const copyNext = (error) => {
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if (error) {
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return reject(error);
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}
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if (queue.length === 0) {
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log('Done copying assets');
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resolve();
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} else {
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const src = queue.shift();
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const dest = filesToCopy[src];
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copy(src, dest, copyNext);
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}
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};
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copyNext();
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});
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}
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function copy(src, dest, callback) {
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const destDir = path.dirname(dest);
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mkdirp(destDir, err => {
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if (err) {
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return callback(err);
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}
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fs.createReadStream(src)
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.pipe(fs.createWriteStream(dest))
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.on('finish', callback);
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});
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}
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module.exports = saveAssets;
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