1import { createWriteStream } from 'fs'
2import { ensurePtTmpDir, ptTmpDir } from '../../serverF/libFs/ensurePtTmpDirF.mts'
3import { getIsTestInstance } from '../../serverF/getReqEnvConfItemF.mts'
4
5export const teeDevServerLog = (appName: string) => {
6  ensurePtTmpDir()
7  const testSuffix = getIsTestInstance() ? '-test' : ''
8  const logPath = `${ptTmpDir}/devserver-${appName}${testSuffix}.log`
9  const logStream = createWriteStream(logPath, {flags: 'w'})
10
11  const origStdoutWrite = process.stdout.write.bind(process.stdout)
12  const origStderrWrite = process.stderr.write.bind(process.stderr)
13
14  process.stdout.write = function(chunk: any, ...args: any[]) {
15    logStream.write(typeof chunk === 'string' ? chunk : chunk?.toString?.() ?? '')
16    return origStdoutWrite(chunk, ...args)
17  } as typeof process.stdout.write
18
19  process.stderr.write = function(chunk: any, ...args: any[]) {
20    logStream.write(typeof chunk === 'string' ? chunk : chunk?.toString?.() ?? '')
21    return origStderrWrite(chunk, ...args)
22  } as typeof process.stderr.write
23
24  process.stdout.write(`[devserver] tee: tmp/devserver-${appName}${testSuffix}.log\n`)
25}
26