mirror of
https://github.com/balena-io/balena-cli.git
synced 2024-12-19 21:57:51 +00:00
94 lines
2.2 KiB
CoffeeScript
94 lines
2.2 KiB
CoffeeScript
os = require('os')
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fs = require('fs')
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async = require('async')
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childProcess = require('child_process')
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progressStream = require('progress-stream')
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IS_WINDOWS = os.platform() is 'win32'
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exports.rescanDrives = (callback) ->
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return callback() if not IS_WINDOWS
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diskpartRescanScriptPath = path.join(__dirname, 'scripts', 'diskpart_rescan')
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childProcess.exec "diskpart /s #{diskpartRescanScriptPath}", {}, (error) ->
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console.log("DISKPART RESULT: #{arguments}")
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return callback(error)
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exports.eraseMBR = (devicePath, callback) ->
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return callback() if not IS_WINDOWS
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bufferSize = 512
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async.waterfall([
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(callback) ->
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fs.open(devicePath, 'rs+', null, callback)
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(fd, callback) ->
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buffer = new Buffer(bufferSize)
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buffer.fill(0)
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fs.write fd, buffer, 0, bufferSize, 0, (error, bytesWritten) ->
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return callback(error) if error?
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return callback(null, bytesWritten, fd)
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(bytesWritten, fd, callback) ->
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if bytesWritten isnt bufferSize
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error = "Bytes written: #{bytesWritten}, expected #{bufferSize}"
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return callback(error)
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fs.close(fd, callback)
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], callback)
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exports.writeImage = (devicePath, imagePath, options = {}, callback = _.noop) ->
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if not fs.existsSync(imagePath)
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return callback(new Error("Invalid OS image: #{imagePath}"))
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if not IS_WINDOWS and not fs.existsSync(devicePath)
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return callback(new Error("Invalid device: #{devicePath}"))
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imageFile = fs.createReadStream(imagePath)
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deviceFile = fs.createWriteStream devicePath,
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# Required by Windows to work correctly
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flags: 'rs+'
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imageFileSize = fs.statSync(imagePath).size
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progress = progressStream
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length: imageFileSize
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time: 500
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if options.progress
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progress.on('progress', options.onProgress)
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async.waterfall([
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(callback) ->
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exports.eraseMBR(devicePath, callback)
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(callback) ->
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exports.rescanDrives(callback)
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(callback) ->
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imageFile
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.pipe(progress)
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.pipe(deviceFile)
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# TODO: We should make use of nodewindows.elevate()
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# if we get an EPERM error.
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.on 'error', (error) ->
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if error.code is 'EBUSY'
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error.message = "Try umounting #{error.path} first."
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return callback(error)
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.on('close', callback)
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(callback) ->
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exports.rescanDrives(callback)
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], callback)
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