41 lines
1.4 KiB
C#
41 lines
1.4 KiB
C#
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using System.IO;
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namespace TeamsISO.App;
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/// <summary>
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/// Bare-metal startup tracer that opens, appends, and closes a file on
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/// every call. Used to capture what's happening BEFORE Serilog comes up
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/// (and to capture failures that would prevent Serilog from coming up at
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/// all). Failures here are swallowed — we never want diagnostics to crash
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/// the very thing we're trying to diagnose.
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///
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/// File lives at <c>%LOCALAPPDATA%\TeamsISO\startup-trace.log</c>. Grows
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/// without rotation; expected to be tiny since each launch writes ~20
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/// lines. Acceptable cost for catching launch-time regressions.
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/// </summary>
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internal static class StartupTrace
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{
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private static readonly object _gate = new();
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public static void Write(string message)
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{
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try
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{
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var dir = Path.Combine(
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Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
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"TeamsISO");
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Directory.CreateDirectory(dir);
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var path = Path.Combine(dir, "startup-trace.log");
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var line = $"[{DateTimeOffset.Now:yyyy-MM-dd HH:mm:ss.fff}] [PID {Environment.ProcessId}] {message}{Environment.NewLine}";
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lock (_gate)
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{
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File.AppendAllText(path, line);
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}
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}
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catch
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{
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// Diagnostics must NEVER crash startup.
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}
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}
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}
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