From 9dc74fd392ea0bb420eb4831e678a6312b416524 Mon Sep 17 00:00:00 2001
From: Juergen Kunz <juergen@foss.global>
Date: Thu, 5 Mar 2026 15:35:57 +0000
Subject: [PATCH] fix(compiler): force global filesystem sync to flush XFS
 delayed logging and add diagnostics comparing Node's readdirSync with system
 ls to detect directory entry inconsistencies

---
 changelog.md                          |  7 +++++
 ts/00_commitinfo_data.ts              |  2 +-
 ts/mod_compiler/classes.tscompiler.ts | 38 +++++++++++++--------------
 3 files changed, 27 insertions(+), 20 deletions(-)

diff --git a/changelog.md b/changelog.md
index c129163..d85a326 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 2026-03-05 - 4.2.2 - fix(compiler)
+force global filesystem sync to flush XFS delayed logging and add diagnostics comparing Node's readdirSync with system ls to detect directory entry inconsistencies
+
+- Replace per-directory fs.fsyncSync loop with execSync('sync') to ensure parent B+tree metadata is flushed on XFS
+- Import execSync from child_process
+- Add diagnostic comparison: run ls -1 and compare its entries to fs.readdirSync; log mismatches and full entry lists for debugging Node.js caching/readdir inconsistencies
+
 ## 2026-03-05 - 4.2.1 - fix(compiler)
 use TypeScript sys hooks instead of fs monkeypatching to detect writes/deletes in previous output directories
 
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index f164013..df38eb4 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@git.zone/tsbuild',
-  version: '4.2.1',
+  version: '4.2.2',
   description: 'A tool for compiling TypeScript files using the latest nightly features, offering flexible APIs and a CLI for streamlined development.'
 }
diff --git a/ts/mod_compiler/classes.tscompiler.ts b/ts/mod_compiler/classes.tscompiler.ts
index 2eb5238..716c876 100644
--- a/ts/mod_compiler/classes.tscompiler.ts
+++ b/ts/mod_compiler/classes.tscompiler.ts
@@ -1,6 +1,7 @@
 import type { CompilerOptions, Diagnostic, Program } from 'typescript';
 import typescript from 'typescript';
 import * as fs from 'fs';
+import { execSync } from 'child_process';
 import * as smartdelay from '@push.rocks/smartdelay';
 import * as smartpromise from '@push.rocks/smartpromise';
 import * as smartpath from '@push.rocks/smartpath';
@@ -453,29 +454,28 @@ export class TsCompiler {
         successfulOutputDirs.push(destDir);
       }
 
-      // Fsync all output directories to force XFS metadata commit
-      // before the next compilation step. Without this, XFS delayed logging
-      // can cause directory entries from previous compilations to become
-      // invisible or corrupted during subsequent TypeScript emit operations.
-      for (const dir of successfulOutputDirs) {
-        try {
-          const fd = fs.openSync(dir, 'r');
-          fs.fsyncSync(fd);
-          fs.closeSync(fd);
-        } catch {
-          // Directory might not exist yet
-        }
-      }
+      // Force global filesystem sync to flush XFS delayed logging (CIL)
+      // before the next compilation step. Per-directory fsync was insufficient;
+      // XFS defers parent B+tree metadata commits which can make sibling
+      // directory entries invisible to readdirSync after heavy write activity.
+      execSync('sync');
 
-      // Diagnostic: log all output directory states after each compilation
+      // Diagnostic: compare readdirSync vs external ls to detect Node.js caching
       if (!isQuiet && !isJson) {
         for (const prevDir of successfulOutputDirs) {
           try {
-            const entries = fs.readdirSync(prevDir);
-            const dirs = entries.filter(e => {
-              try { return fs.statSync(prevDir + '/' + e).isDirectory(); } catch { return false; }
-            });
-            console.log(`   📋 [diag] ${prevDir.replace(this.cwd + '/', '')}: ${entries.length} entries, ${dirs.length} dirs`);
+            const nodeEntries = fs.readdirSync(prevDir);
+            const nodeDirs = nodeEntries.filter(e => { try { return fs.statSync(prevDir + '/' + e).isDirectory(); } catch { return false; } });
+            const lsOutput = execSync(`ls -1 "${prevDir}"`, { encoding: 'utf8' }).trim();
+            const lsEntries = lsOutput ? lsOutput.split('\n') : [];
+            const shortDir = prevDir.replace(this.cwd + '/', '');
+            if (nodeEntries.length !== lsEntries.length) {
+              console.log(`   ⚠️ [diag] ${shortDir}: readdirSync=${nodeEntries.length}, ls=${lsEntries.length} (MISMATCH!)`);
+              console.log(`      readdirSync: [${nodeEntries.sort().join(', ')}]`);
+              console.log(`      ls:          [${lsEntries.sort().join(', ')}]`);
+            } else {
+              console.log(`   📋 [diag] ${shortDir}: ${nodeEntries.length} entries, ${nodeDirs.length} dirs ✓`);
+            }
           } catch {
             console.log(`   📋 [diag] ${prevDir.replace(this.cwd + '/', '')}: MISSING!`);
           }