JMR-devandCopilot
9b576ea633
Add Microsoft.Extensions.DependencyInjection package and introduce an IStartupTracer abstraction with NoOpStartupTracer (zero-overhead default) and FileStartupTracer (renamed from WinUiStartupTrace). A StartupTracer factory selects the implementation from environment configuration. Consumers (App, MainWindow, MainWindowViewModel, SensorColumnMeasurer) now depend on the non-nullable interface, removing null-conditional trace calls and decoupling startup instrumentation from construction logic. No behavior change: tracing still writes the same log when enabled. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
57 lines
2.2 KiB
C#
57 lines
2.2 KiB
C#
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
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// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// Copyright (C) LibreHardwareMonitor and Contributors.
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using System;
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using System.IO;
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namespace LibreHardwareMonitor.Windows.WinUI.Services.Tracing;
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/// <summary>
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/// Factory that selects the appropriate <see cref="IStartupTracer"/> based on environment
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/// configuration. Returns a <see cref="FileStartupTracer"/> when timing is enabled, otherwise
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/// the shared <see cref="NoOpStartupTracer"/>.
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/// </summary>
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internal static class StartupTracer
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{
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private const string EnabledEnvironmentVariable = "LHM_WINUI_STARTUP_TIMING";
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private const string PathEnvironmentVariable = "LHM_WINUI_STARTUP_TIMING_PATH";
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public static IStartupTracer Create()
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{
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return IsEnabled() ? new FileStartupTracer(GetLogFileName()) : NoOpStartupTracer.Instance;
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}
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private static string GetLogFileName()
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{
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string? configuredPath = Environment.GetEnvironmentVariable(PathEnvironmentVariable);
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string fileName = $"LibreHardwareMonitor.WinUIStartupTiming-{DateTime.Now:yyyyMMdd-HHmmss-fff}.log";
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if (string.IsNullOrWhiteSpace(configuredPath))
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return Path.Combine(AppContext.BaseDirectory, fileName);
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if (configuredPath.EndsWith(Path.DirectorySeparatorChar.ToString(), StringComparison.Ordinal)
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|| configuredPath.EndsWith(Path.AltDirectorySeparatorChar.ToString(), StringComparison.Ordinal)
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|| Directory.Exists(configuredPath))
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{
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return Path.Combine(configuredPath, fileName);
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}
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return configuredPath;
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}
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private static bool IsEnabled()
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{
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string environmentValue = Environment.GetEnvironmentVariable(EnabledEnvironmentVariable) ?? "";
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return IsTruthy(environmentValue);
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}
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private static bool IsTruthy(string value)
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{
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return value.Equals("1", StringComparison.OrdinalIgnoreCase)
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|| value.Equals("true", StringComparison.OrdinalIgnoreCase)
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|| value.Equals("yes", StringComparison.OrdinalIgnoreCase)
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|| value.Equals("on", StringComparison.OrdinalIgnoreCase);
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}
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}
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