From b69556c918e2a4a27b047e8de6b02861f04d5a9e Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Mon, 21 Aug 2023 23:43:32 +0000
Subject: [PATCH] fix: async-mutex not exclusively locking correectly

---
 quartz/build.ts |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/quartz/build.ts b/quartz/build.ts
index 78437f8..0af39d0 100644
--- a/quartz/build.ts
+++ b/quartz/build.ts
@@ -108,12 +108,13 @@
       toRemove.add(filePath)
     }
 
-    timeoutIds.forEach((id) => clearTimeout(id))
-
     // debounce rebuilds every 250ms
     timeoutIds.add(
       setTimeout(async () => {
-        await buildMutex.acquire()
+        const release = await buildMutex.acquire()
+        timeoutIds.forEach((id) => clearTimeout(id))
+        timeoutIds.clear()
+
         const perf = new PerfTimer()
         console.log(chalk.yellow("Detected change, rebuilding..."))
         try {
@@ -134,6 +135,8 @@
             contentMap.delete(fp)
           }
 
+          // TODO: we can probably traverse the link graph to figure out what's safe to delete here
+          // instead of just deleting everything
           await rimraf(argv.output)
           const parsedFiles = [...contentMap.values()]
           const filteredContent = filterContent(ctx, parsedFiles)
@@ -146,7 +149,7 @@
         clientRefresh()
         toRebuild.clear()
         toRemove.clear()
-        buildMutex.release()
+        release()
       }, 250),
     )
   }

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