init

LightlessSync/FileCache/FileCacheManager.cs

@@ -27,6 +27,7 @@ public sealed class FileCacheManager : IHostedService
     private readonly Lock _fileWriteLock = new();
     private readonly IpcManager _ipcManager;
     private readonly ILogger<FileCacheManager> _logger;
+    private bool _csvHeaderEnsured;
     public string CacheFolder => _configService.Current.CacheFolder;
 
     public FileCacheManager(ILogger<FileCacheManager> logger, IpcManager ipcManager, LightlessConfigService configService, LightlessMediator lightlessMediator)
@@ -462,6 +463,7 @@ public sealed class FileCacheManager : IHostedService
         string[] existingLines = File.ReadAllLines(_csvPath);
         if (existingLines.Length > 0 && TryParseVersionHeader(existingLines[0], out var existingVersion) && existingVersion == FileCacheVersion)
         {
+            _csvHeaderEnsured = true;
             return;
         }
 
@@ -481,6 +483,18 @@ public sealed class FileCacheManager : IHostedService
         }
 
         File.WriteAllText(_csvPath, rebuilt.ToString());
+        _csvHeaderEnsured = true;
+    }
+
+    private void EnsureCsvHeaderLockedCached()
+    {
+        if (_csvHeaderEnsured)
+        {
+            return;
+        }
+
+        EnsureCsvHeaderLocked();
+        _csvHeaderEnsured = true;
     }
 
     private void BackupUnsupportedCache(string suffix)
@@ -540,10 +554,11 @@ public sealed class FileCacheManager : IHostedService
             if (!File.Exists(_csvPath))
             {
                 File.WriteAllLines(_csvPath, new[] { BuildVersionHeader(), entity.CsvEntry });
+                _csvHeaderEnsured = true;
             }
             else
             {
-                EnsureCsvHeaderLocked();
+                EnsureCsvHeaderLockedCached();
                 File.AppendAllLines(_csvPath, new[] { entity.CsvEntry });
             }
         }