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https://github.com/balena-io/etcher.git
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c44594b45e
ES6 fat arrows provide reasonable `this` behaviour, which protects us from some subtle accidental bugs, and erradicates `const self = this` from the codebase. Far arrows were not applied in Mocha code and AngularJS controllers/services constructors since these frameworks rely on `.bind()` on those functions. Signed-off-by: Juan Cruz Viotti <jviottidc@gmail.com>
91 lines
2.7 KiB
JavaScript
91 lines
2.7 KiB
JavaScript
/*
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* Copyright 2016 Resin.io
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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const imageWrite = require('etcher-image-write');
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const imageStream = require('etcher-image-stream');
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const Bluebird = require('bluebird');
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const umount = Bluebird.promisifyAll(require('umount'));
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const os = require('os');
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const isWindows = os.platform() === 'win32';
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if (isWindows) {
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// The `can-ignore` annotation is EncloseJS (http://enclosejs.com) specific.
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var removedrive = Bluebird.promisifyAll(require('removedrive', 'can-ignore'));
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}
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/**
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* @summary Write an image to a disk drive
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* @function
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* @public
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*
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* @description
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* See https://github.com/resin-io-modules/etcher-image-write for information
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* about the `state` object passed to `onProgress` callback.
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*
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* @param {String} imagePath - path to image
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* @param {Object} drive - drive
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* @param {Object} options - options
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* @param {Boolean} [options.unmountOnSuccess=false] - unmount on success
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* @param {Boolean} [options.validateWriteOnSuccess=false] - validate write on success
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* @param {Function} onProgress - on progress callback (state)
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*
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* @fulfil {Boolean} - whether the operation was successful
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* @returns {Promise}
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*
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* @example
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* writer.writeImage('path/to/image.img', {
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* device: '/dev/disk2'
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* }, {
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* unmountOnSuccess: true,
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* validateWriteOnSuccess: true
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* }, (state) => {
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* console.log(state.percentage);
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* }).then(() => {
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* console.log('Done!');
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* });
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*/
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exports.writeImage = (imagePath, drive, options, onProgress) => {
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return umount.umountAsync(drive.device).then(() => {
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return imageStream.getFromFilePath(imagePath);
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}).then((image) => {
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return imageWrite.write(drive.device, image.stream, {
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check: options.validateWriteOnSuccess,
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size: image.size,
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transform: image.transform
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});
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}).then((writer) => {
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return new Bluebird((resolve, reject) => {
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writer.on('progress', onProgress);
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writer.on('error', reject);
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writer.on('done', resolve);
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});
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}).tap(() => {
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if (!options.unmountOnSuccess) {
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return;
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}
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if (isWindows && drive.mountpoint) {
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return removedrive.ejectAsync(drive.mountpoint);
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}
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return umount.umountAsync(drive.device);
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});
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};
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