/
index.ts
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/
index.ts
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import { createConnection } from 'node:net'
import {
StackFrame,
parse as parseStackTrace,
} from '@vercel/turbopack-next/compiled/stacktrace-parser'
export type StructuredError = {
name: string
message: string
stack: StackFrame[]
}
export function structuredError(e: Error): StructuredError {
return {
name: e.name,
message: e.message,
stack: parseStackTrace(e.stack!),
}
}
type State =
| {
type: 'waiting'
}
| {
type: 'packet'
length: number
}
export type Ipc<TIncoming, TOutgoing> = {
recv(): Promise<TIncoming>
send(message: TOutgoing): Promise<void>
sendError(error: Error): Promise<never>
}
function createIpc<TIncoming, TOutgoing>(
port: number
): Ipc<TIncoming, TOutgoing> {
const socket = createConnection(port, '127.0.0.1')
const packetQueue: Buffer[] = []
const recvPromiseResolveQueue: Array<(message: TIncoming) => void> = []
function pushPacket(packet: Buffer) {
const recvPromiseResolve = recvPromiseResolveQueue.shift()
if (recvPromiseResolve != null) {
recvPromiseResolve(JSON.parse(packet.toString('utf8')) as TIncoming)
} else {
packetQueue.push(packet)
}
}
let state: State = { type: 'waiting' }
let buffer: Buffer = Buffer.alloc(0)
socket.once('connect', () => {
socket.on('data', (chunk) => {
buffer = Buffer.concat([buffer, chunk])
loop: while (true) {
switch (state.type) {
case 'waiting': {
if (buffer.length >= 4) {
const length = buffer.readUInt32BE(0)
buffer = buffer.subarray(4)
state = { type: 'packet', length }
} else {
break loop
}
break
}
case 'packet': {
if (buffer.length >= state.length) {
const packet = buffer.subarray(0, state.length)
buffer = buffer.subarray(state.length)
state = { type: 'waiting' }
pushPacket(packet)
} else {
break loop
}
break
}
}
}
})
})
// When the socket is closed, this process is no longer needed.
// This might happen e. g. when parent process is killed or
// node.js pool is garbage collected.
socket.once('close', () => {
process.exit(0)
})
function send(message: any): Promise<void> {
const packet = Buffer.from(JSON.stringify(message), 'utf8')
const length = Buffer.alloc(4)
length.writeUInt32BE(packet.length)
socket.write(length)
return new Promise((resolve, reject) => {
socket.write(packet, (err) => {
process.stderr.write(`TURBOPACK_OUTPUT_D\n`)
process.stdout.write(`TURBOPACK_OUTPUT_D\n`)
if (err != null) {
reject(err)
} else {
resolve()
}
})
})
}
return {
async recv() {
const packet = packetQueue.shift()
if (packet != null) {
return JSON.parse(packet.toString('utf8')) as TIncoming
}
const result = await new Promise<TIncoming>((resolve) => {
recvPromiseResolveQueue.push((result) => {
resolve(result)
})
})
return result
},
send(message: TOutgoing) {
return send(message)
},
async sendError(error: Error): Promise<never> {
try {
await send({
type: 'error',
...structuredError(error),
})
} catch (err) {
// ignore and exit anyway
}
process.exit(1)
},
}
}
const PORT = process.argv[2]
export const IPC = createIpc<unknown, unknown>(parseInt(PORT, 10))
process.on('uncaughtException', (err) => {
IPC.sendError(err)
})
const improveConsole = (name: string, stream: string, addStack: boolean) => {
// @ts-ignore
const original = console[name]
// @ts-ignore
const stdio = process[stream]
// @ts-ignore
console[name] = (...args: any[]) => {
stdio.write(`TURBOPACK_OUTPUT_B\n`)
original(...args)
if (addStack) {
const stack = new Error().stack?.replace(/^.+\n.+\n/, '') + '\n'
stdio.write('TURBOPACK_OUTPUT_S\n')
stdio.write(stack)
}
stdio.write('TURBOPACK_OUTPUT_E\n')
}
}
improveConsole('error', 'stderr', true)
improveConsole('warn', 'stderr', true)
improveConsole('count', 'stdout', true)
improveConsole('trace', 'stderr', false)
improveConsole('log', 'stdout', true)
improveConsole('group', 'stdout', true)
improveConsole('groupCollapsed', 'stdout', true)
improveConsole('table', 'stdout', true)
improveConsole('debug', 'stdout', true)
improveConsole('info', 'stdout', true)
improveConsole('dir', 'stdout', true)
improveConsole('dirxml', 'stdout', true)
improveConsole('timeEnd', 'stdout', true)
improveConsole('timeLog', 'stdout', true)
improveConsole('timeStamp', 'stdout', true)
improveConsole('assert', 'stderr', true)