Remove unused vars and fix linting issues

src/api.coffee

@@ -1,5 +1,4 @@
 Promise = require 'bluebird'
-fs = Promise.promisifyAll require 'fs'
 utils = require './utils'
 knex = require './db'
 express = require 'express'
@@ -52,7 +51,7 @@ module.exports = (application) ->
 		request.post(config.gosuperAddress + '/v1/shutdown')
 		.pipe(res)
 
-	parsedRouter.post '/v1/purge',(req, res) ->
+	parsedRouter.post '/v1/purge', (req, res) ->
 		appId = req.body.appId
 		utils.mixpanelTrack('Purge /data', appId)
 		if !appId?

src/application.coffee

@@ -92,7 +92,7 @@ logSystemEvent = (logType, app, error) ->
 		if _.isEmpty(errMessage)
 			errMessage = 'Unknown cause'
 		message += " due to '#{errMessage}'"
-	logSystemMessage(message, {app, error}, logType.eventName)
+	logSystemMessage(message, { app, error }, logType.eventName)
 	return
 
 logSpecialAction = (action, value, success) ->
@@ -100,7 +100,7 @@ logSpecialAction = (action, value, success) ->
 		msg = "Applied config variable #{action} = #{value}"
 	else
 		msg = "Applying config variable #{action} = #{value}"
-	logSystemMessage(msg, {}, "Apply special action #{success ? "success" : "in progress"}")
+	logSystemMessage(msg, {}, "Apply special action #{if success then "success" else "in progress"}")
 
 application = {}
 
@@ -694,7 +694,7 @@ application.initialize = ->
 	.catch (error) ->
 		console.error('Error starting apps:', error)
 	.then ->
-		utils.mixpanelTrack('Start application update poll', {interval: config.appUpdatePollInterval})
+		utils.mixpanelTrack('Start application update poll', { interval: config.appUpdatePollInterval })
 		application.poll()
 		application.update()
 

src/bootstrap.coffee

@@ -1,11 +1,9 @@
 Promise = require 'bluebird'
-_ = require 'lodash'
 knex = require './db'
 utils = require './utils'
 deviceRegister = require 'resin-register-device'
 { resinApi } = require './request'
 fs = Promise.promisifyAll(require('fs'))
-EventEmitter = require('events').EventEmitter
 config = require './config'
 configPath = '/boot/config.json'
 appsPath  = '/boot/apps.json'
@@ -27,7 +25,7 @@ loadPreloadedApps = ->
 			app.env = JSON.stringify(extendedEnv)
 			knex('app').insert(app)
 	.catch (err) ->
-		utils.mixpanelTrack('Loading preloaded apps failed', {error: err})
+		utils.mixpanelTrack('Loading preloaded apps failed', { error: err })
 
 bootstrap = ->
 	Promise.try ->
@@ -87,7 +85,7 @@ readConfigAndEnsureUUID = ->
 bootstrapOrRetry = ->
 	utils.mixpanelTrack('Device bootstrap')
 	bootstrap().catch (err) ->
-		utils.mixpanelTrack('Device bootstrap failed, retrying', {error: err, delay: config.bootstrapRetryDelay})
+		utils.mixpanelTrack('Device bootstrap failed, retrying', { error: err, delay: config.bootstrapRetryDelay })
 		setTimeout(bootstrapOrRetry, config.bootstrapRetryDelay)
 
 bootstrapper.done = new Promise (resolve) ->

src/config.coffee

@@ -17,7 +17,7 @@ checkString = (s) ->
 dockerRoot = checkString(process.env.DOCKER_ROOT) ? '/mnt/root/var/lib/rce'
 
 # Defaults needed for both gosuper and node supervisor are declared in entry.sh
-module.exports = config =
+module.exports =
 	apiEndpoint: checkString(process.env.API_ENDPOINT) ? 'https://api.resin.io'
 	apiTimeout: checkInt(process.env.API_TIMEOUT) ? 15 * 60 * 1000
 	listenPort: checkInt(process.env.LISTEN_PORT) ? 80
@@ -48,4 +48,4 @@ module.exports = config =
 		'RESIN_SUPERVISOR_API_KEY'
 		'RESIN_API_KEY'
 	]
-	dataPath: checkString(process.env.RESIN_DATA_PATH) ? "/resin-data"
+	dataPath: checkString(process.env.RESIN_DATA_PATH) ? '/resin-data'

src/device.coffee

@@ -20,7 +20,7 @@ exports.getID = do ->
 				knex('config').select('value').where(key: 'apiKey')
 				knex('config').select('value').where(key: 'uuid')
 			])
-			.spread ([{value: apiKey}], [{value: uuid}]) ->
+			.spread ([{ value: apiKey }], [{ value: uuid }]) ->
 				resinApi.get(
 					resource: 'device'
 					options:
@@ -35,10 +35,10 @@ exports.getID = do ->
 					throw new Error('Could not find this device?!')
 				return devices[0].id
 
-exports.reboot = rebootDevice = ->
+exports.reboot = ->
 	request.postAsync(config.gosuperAddress + '/v1/reboot')
 
-exports.hostConfigEnvVarPrefix = hostConfigEnvVarPrefix = 'RESIN_HOST_'
+exports.hostConfigEnvVarPrefix = 'RESIN_HOST_'
 bootConfigEnvVarPrefix = 'RESIN_HOST_CONFIG_'
 bootBlockDevice = '/dev/mmcblk0p1'
 bootMountPoint = '/mnt/root/boot'
@@ -77,17 +77,17 @@ exports.setHostConfig = (env, logMessage) ->
 setLogToDisplay = (env, logMessage) ->
 	if env['RESIN_HOST_LOG_TO_DISPLAY']?
 		enable = env['RESIN_HOST_LOG_TO_DISPLAY'] != '0'
-		request.postAsync(config.gosuperAddress + '/v1/set-log-to-display', {json: true, body: Enable: enable})
+		request.postAsync(config.gosuperAddress + '/v1/set-log-to-display', { json: true, body: Enable: enable })
 		.spread (response, body) ->
 			if response.statusCode != 200
-				logMessage("Error setting log to display: #{body.Error}, Status:, #{response.statusCode}", {error: body.Error}, "Set log to display error")
+				logMessage("Error setting log to display: #{body.Error}, Status:, #{response.statusCode}", { error: body.Error }, 'Set log to display error')
 				return false
 			else
 				if body.Data == true
-					logMessage("#{if enable then "Enabled" else "Disabled"} logs to display")
+					logMessage("#{if enable then 'Enabled' else 'Disabled'} logs to display")
 				return body.Data
 		.catch (err) ->
-			logMessage("Error setting log to display: #{err}", {error: err}, "Set log to display error")
+			logMessage("Error setting log to display: #{err}", { error: err }, 'Set log to display error')
 			return false
 	else
 		return Promise.resolve(false)
@@ -118,7 +118,7 @@ setBootConfig = (env, logMessage) ->
 				configFromApp[key] != configFromFS[key]
 			throw new Error('Nothing to change') if _.isEmpty(toBeChanged) and _.isEmpty(toBeAdded)
 
-			logMessage("Applying boot config: #{JSON.stringify(configFromApp)}", {}, "Apply boot config in progress")
+			logMessage("Applying boot config: #{JSON.stringify(configFromApp)}", {}, 'Apply boot config in progress')
 			# We add the keys to be added first so they are out of any filters
 			outputConfig = _.map toBeAdded, (key) -> "#{key}=#{configFromApp[key]}"
 			outputConfig = outputConfig.concat _.map configPositions, (key, index) ->
@@ -137,10 +137,10 @@ setBootConfig = (env, logMessage) ->
 			.then ->
 				execAsync('sync')
 			.then ->
-				logMessage("Applied boot config: #{JSON.stringify(configFromApp)}", {}, "Apply boot config success")
+				logMessage("Applied boot config: #{JSON.stringify(configFromApp)}", {}, 'Apply boot config success')
 				return true
 			.catch (err) ->
-				logMessage("Error setting boot config: #{err}", {error: err}, "Apply boot config error")
+				logMessage("Error setting boot config: #{err}", { error: err }, 'Apply boot config error')
 				throw err
 	.catch (err) ->
 		console.log('Will not set boot config: ', err)
@@ -175,7 +175,7 @@ do ->
 		applyPromise = Promise.join(
 			knex('config').select('value').where(key: 'apiKey')
 			device.getID()
-			([{value: apiKey}], deviceID) ->
+			([{ value: apiKey }], deviceID) ->
 				stateDiff = getStateDiff()
 				if _.size(stateDiff) is 0 || !apiKey?
 					return
@@ -190,7 +190,7 @@ do ->
 					_.merge(actualState, stateDiff)
 		)
 		.catch (error) ->
-			utils.mixpanelTrack('Device info update failure', {error, stateDiff})
+			utils.mixpanelTrack('Device info update failure', { error, stateDiff })
 			# Delay 5s before retrying a failed update
 			Promise.delay(5000)
 		.finally ->
@@ -221,7 +221,7 @@ do ->
 exports.getOSVersion = ->
 	fs.readFileAsync(config.hostOsVersionPath)
 	.then (releaseData) ->
-		lines = (new String(releaseData)).split("\n")
+		lines = (new String(releaseData)).split('\n')
 		releaseItems = {}
 		for line in lines
 			[ key, val ] = line.split('=')
@@ -229,5 +229,5 @@ exports.getOSVersion = ->
 		# Remove enclosing quotes: http://stackoverflow.com/a/19156197/2549019
 		return releaseItems['PRETTY_NAME'].replace(/^"(.+(?="$))"$/, '$1')
 	.catch (err) ->
-		console.log("Could not get OS Version: ", err, err.stack)
+		console.log('Could not get OS Version: ', err, err.stack)
 		return undefined

src/docker-utils.coffee

@@ -7,7 +7,6 @@ config = require './config'
 _ = require 'lodash'
 knex = require './db'
 { request } = require './request'
-fs = Promise.promisifyAll require 'fs'
 Lock = require 'rwlock'
 
 docker = Promise.promisifyAll(new Docker(socketPath: config.dockerSocket))
@@ -50,7 +49,7 @@ DELTA_REQUEST_TIMEOUT = 15 * 60 * 1000
 getRepoAndTag = (image) ->
 	getRegistryAndName(image)
 	.then ({ registry, imageName, tagName }) ->
-		registry = registry.toString().replace(':443','')
+		registry = registry.toString().replace(':443', '')
 		return { repo: "#{registry}/#{imageName}", tag: tagName }
 
 do ->
@@ -183,7 +182,7 @@ do ->
 		_.omit(query, 'apikey')
 
 	exports.createImage = (req, res) ->
-		{ registry, repo, tag, fromImage, fromSrc } = req.query
+		{ registry, repo, tag, fromImage } = req.query
 		if fromImage?
 			repoTag = fromImage
 			repoTag += ':' + tag if tag?

src/utils.coffee

@@ -11,8 +11,6 @@ randomHexString = require './lib/random-hex-string'
 request = Promise.promisifyAll require 'request'
 logger = require './lib/logger'
 
-utils = exports
-
 # Parses package.json and returns resin-supervisor's version
 version = require('../package.json').version
 tagExtra = process.env.SUPERVISOR_TAG_EXTRA