From 49bd6bc3ffe1d3507e00bae62c12d9b045363090 Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Wed, 09 Aug 2023 05:52:49 +0000
Subject: [PATCH] better concurrency debugging, --concurrency flag for npx quartz build

---
 quartz/trace.ts |   30 ++++++++++++++++++++++--------
 1 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/quartz/trace.ts b/quartz/trace.ts
index 337ffe0..ca3a5a0 100644
--- a/quartz/trace.ts
+++ b/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)
+  }
 }

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