better concurrency debugging, --concurrency flag for npx quartz build

Jacky Zhao

2023-08-09 49bd6bc3ffe1d3507e00bae62c12d9b045363090

 quartz/trace.ts

@@ -1,17 +1,22 @@
import chalk from "chalk"
import process from "process"
import { isMainThread } from "workerpool"

const rootFile = /.*at file:/
export function trace(msg: string, err: Error) {
  const stack = err.stack
  console.log()
  console.log(

  const lines: string[] = []

  lines.push("")
  lines.push(
    "\n" +
      chalk.bgRed.black.bold(" ERROR ") +
      "\n" +
      chalk.red(` ${msg}`) +
      (err.message.length > 0 ? `: ${err.message}` : ""),
    chalk.bgRed.black.bold(" ERROR ") +
    "\n" +
    chalk.red(` ${msg}`) +
    (err.message.length > 0 ? `: ${err.message}` : ""),
  )

  if (!stack) {
    return
  }
@@ -23,11 +28,20 @@
    }

    if (!line.includes("node_modules")) {
      console.log(` ${line}`)
      lines.push(` ${line}`)
      if (rootFile.test(line)) {
        reachedEndOfLegibleTrace = true
      }
    }
  }
  process.exit(1)

  const traceMsg = lines.join("\n")
  if (!isMainThread) {
    // gather lines and throw
    throw new Error(traceMsg)
  } else {
    // print and exit
    console.error(traceMsg)
    process.exit(1)
  }
}