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import { spawn } from 'child_process'
import { createWriteStream, ensureFileSync } from 'fs-extra'
import paramCase from 'param-case'
import { promisify } from 'util'
import getFilePath from './utils/getFilePath'
const log = logger('@wdio/appium-service')
const DEFAULT_LOG_FILENAME = 'appium.txt'
export class AppiumLauncher {
constructor() {
this.logPath = null
this.command = ''
this.appiumArgs = []
}
async onPrepare(config) {
const appiumConfig = config.appium || {}
this.logPath = appiumConfig.logPath || config.outputDir
// Set config command
if (appiumConfig.command) {
this.command = appiumConfig.command
} else {
// Windows expects node to be explicitely set as command and appium module path as it's first argument
this.command = 'node'
this.appiumArgs.push(this._getAppiumCommand())
}
// Append remaining arguments
this.appiumArgs.push(...this._cliArgsFromKeyValue(appiumConfig.args || {}))
const asyncStartAppium = promisify(this._startAppium)
this.process = await asyncStartAppium(this.command, this.appiumArgs, this.waitStartTime)
if (typeof this.logPath === 'string') {
this._redirectLogStream(this.logPath)
}
}
onComplete() {
if(this.process) {
log.debug(`Appium (pid: ${process.pid}) killed`)
this.process.kill()
}
}
_startAppium(command, args, waitStartTime, callback) {
log.debug(`Will spawn Appium process: ${command} ${args.join(' ')}`)
let process = spawn(command, args, { stdio: ['ignore', 'pipe', 'pipe'] })
let error
process.stdout.on('data', (data) => {
if (data.includes('Appium REST http interface listener started')) {
log.debug(`Appium started with ID: ${process.pid}`)
callback(null, process)
}
})
// only capture first error to print it in case Appium failed to start.
process.stderr.once('data', err => { error = err })
process.once('exit', (exitCode) => {
let errorMessage = `Appium exited before timeout (exit code: ${exitCode})`
if (exitCode == 2) {
errorMessage += '\n' + (error || 'Check that you don\'t already have a running Appium service.')
log.error(errorMessage)
}
callback(new Error(errorMessage), null)
})
}
_redirectLogStream(logPath) {
const logFile = getFilePath(logPath, DEFAULT_LOG_FILENAME)
// ensure file & directory exists
ensureFileSync(logFile)
log.debug(`Appium logs written to: ${logFile}`)
const logStream = createWriteStream(logFile, { flags: 'w' })
this.process.stdout.pipe(logStream)
this.process.stderr.pipe(logStream)
}
_getAppiumCommand(moduleName = 'appium') {
try {
return require.resolve(moduleName)
} catch (err) {
log.error('appium is not installed locally.\n' +
'If you use globally installed appium please add\n' +
"appium: { command: 'appium' }\n" +
'to your wdio.conf.js!')
throw err
}
}
_cliArgsFromKeyValue(keyValueArgs) {
if (Array.isArray(keyValueArgs)) {
return keyValueArgs
}
const cliArgs = []
for (let key in keyValueArgs) {
const value = keyValueArgs[key]
// If the value is false or null the argument is discarded
if ((typeof value === 'boolean' && !value) || value === null) {
continue
}
cliArgs.push(`--${paramCase(key)}`)
// Only non-boolean and non-null values are added as option values
if (typeof value !== 'boolean' && value !== null) {
cliArgs.push(this._sanitizeCliOptionValue(value))
}
}
return cliArgs
}
_sanitizeCliOptionValue(value) {
const valueString = String(value)
// Encapsulate the value string in single quotes if it contains a white space
return /\s/.test(valueString) ? `'${valueString}'` : valueString
}
}
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