/
serve.js
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serve.js
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// @ts-check
// this is automtically detected by scripts/jestPerTestSetup.ts and will replace
// the default e2e test serve behavior
const path = require('path')
// eslint-disable-next-line node/no-restricted-require
const execa = require('execa')
const { workspaceRoot } = require('../../testUtils')
const isWindows = process.platform === 'win32'
const port = (exports.port = 9511) // make sure this port is unique across tests with custom servers
const viteBin = path.join(workspaceRoot, 'packages', 'vite', 'bin', 'vite.js')
/**
* @param {string} root
* @param {boolean} isProd
*/
exports.serve = async function serve(root, isProd) {
// collect stdout and stderr streams from child processes here to avoid interfering with regular jest output
const streams = {
build: { out: [], err: [] },
server: { out: [], err: [] }
}
// helpers to collect streams
const collectStreams = (name, process) => {
process.stdout.on('data', (d) => streams[name].out.push(d.toString()))
process.stderr.on('data', (d) => streams[name].err.push(d.toString()))
}
const collectErrorStreams = (name, e) => {
e.stdout && streams[name].out.push(e.stdout)
e.stderr && streams[name].err.push(e.stderr)
}
// helper to output stream content on error
const printStreamsToConsole = async (name) => {
const std = streams[name]
if (std.out && std.out.length > 0) {
console.log(`stdout of ${name}\n${std.out.join('\n')}\n`)
}
if (std.err && std.err.length > 0) {
console.log(`stderr of ${name}\n${std.err.join('\n')}\n`)
}
}
// only run `vite build` when needed
if (isProd) {
const buildCommand = `${viteBin} build`
try {
const buildProcess = execa.command(buildCommand, {
cwd: root,
stdio: 'pipe'
})
collectStreams('build', buildProcess)
await buildProcess
} catch (e) {
console.error(`error while executing cli command "${buildCommand}":`, e)
collectErrorStreams('build', e)
await printStreamsToConsole('build')
throw e
}
}
// run `vite --port x` or `vite preview --port x` to start server
const viteServerArgs = ['--port', `${port}`, '--strict-port']
if (isProd) {
viteServerArgs.unshift('preview')
}
const serverCommand = `${viteBin} ${viteServerArgs.join(' ')}`
const serverProcess = execa.command(serverCommand, {
cwd: root,
stdio: 'pipe'
})
collectStreams('server', serverProcess)
// close server helper, send SIGTERM followed by SIGKILL if needed, give up after 3sec
const close = async () => {
if (serverProcess) {
const timeoutError = `server process still alive after 3s`
try {
killProcess(serverProcess)
await resolvedOrTimeout(serverProcess, 10000, timeoutError)
} catch (e) {
if (e === timeoutError || (!serverProcess.killed && !isWindows)) {
collectErrorStreams('server', e)
console.error(
`error while killing cli command "${serverCommand}":`,
e
)
await printStreamsToConsole('server')
}
}
}
}
try {
await startedOnPort(serverProcess, port, 3000)
return { close }
} catch (e) {
collectErrorStreams('server', e)
console.error(`error while executing cli command "${serverCommand}":`, e)
await printStreamsToConsole('server')
try {
await close()
} catch (e1) {
console.error(
`error while killing cli command after failed execute "${serverCommand}":`,
e1
)
}
}
}
// helper to validate that server was started on the correct port
async function startedOnPort(serverProcess, port, timeout) {
let checkPort
const startedPromise = new Promise((resolve, reject) => {
checkPort = (data) => {
const str = data.toString()
// hack, console output may contain color code gibberish
// skip gibberish between localhost: and port number
const match = str.match(/(http:\/\/localhost:)(?:.*)(\d{4})/)
if (match) {
const startedPort = parseInt(match[2], 10)
if (startedPort === port) {
resolve()
} else {
const msg = `server listens on port ${startedPort} instead of ${port}`
reject(msg)
}
}
}
serverProcess.stdout.on('data', checkPort)
})
return resolvedOrTimeout(
startedPromise,
timeout,
`failed to start within ${timeout}ms`
).finally(() => serverProcess.stdout.off('data', checkPort))
}
// helper function to kill process, uses taskkill on windows to ensure child process is killed too
function killProcess(serverProcess) {
if (isWindows) {
try {
execa.commandSync(`taskkill /pid ${serverProcess.pid} /T /F`)
} catch (e) {
console.error('failed to taskkill:', e)
}
} else {
serverProcess.kill('SIGTERM', { forceKillAfterTimeout: 2000 })
}
}
// helper function that rejects with errorMessage if promise isn't settled within ms
async function resolvedOrTimeout(promise, ms, errorMessage) {
let timer
return Promise.race([
promise,
new Promise((_, reject) => {
timer = setTimeout(() => reject(errorMessage), ms)
})
]).finally(() => {
clearTimeout(timer)
timer = null
})
}