9a47ac8d90
Registers Serilog via SVSim.Hosting.UseSvSimSerilog("svsim-api") right
after CreateBuilder and wraps Main in try/catch/finally so a fatal
startup exception logs before CloseAndFlush.
Also updates the SVSim.Hosting extension to gate the file sink on entry
assembly rather than the ASP.NET environment name. WebApplicationFactory
sets the environment via a hook that resolves after both CreateBuilder
and the UseSerilog callback see their environment view, so
IsEnvironment("Testing") is unreliable in tests. The entry assembly
under `dotnet test` is always "testhost", which is a reliable signal.
appsettings.json grows a Serilog section mirroring the existing
Logging:LogLevel overrides; the Logging block itself is left in place
per the spec's follow-up cleanup note.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
60 lines
2.9 KiB
C#
60 lines
2.9 KiB
C#
using System.Reflection;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Hosting;
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using Serilog;
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using Serilog.Events;
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using Serilog.Sinks.SystemConsole.Themes;
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namespace SVSim.Hosting;
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public static class SerilogHostingExtensions
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{
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// Detects `dotnet test` runs regardless of ASPNETCORE_ENVIRONMENT wiring. The env check
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// via HostingEnvironment.IsEnvironment("Testing") is unreliable here because
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// WebApplicationFactory<TEntryPoint> sets the environment via a mechanism that fires after
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// both CreateBuilder and the UseSerilog callback resolve their environment view. The entry
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// assembly under NUnit + dotnet test is always "testhost" or "testhost.x86".
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private static readonly bool IsTestHost =
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Assembly.GetEntryAssembly()?.GetName().Name?.StartsWith("testhost", StringComparison.OrdinalIgnoreCase) == true;
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// Wires Serilog as the host's logging provider. Sinks, rotation, retention,
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// and enrichment defaults are baked in here; per-category level overrides
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// ride via appsettings under "Serilog:MinimumLevel:Override". The file sink
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// rolls daily (or when a single file hits 100 MB) and retains the newest 7.
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public static IHostBuilder UseSvSimSerilog(this IHostBuilder host, string appName)
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{
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var logDirectory = Path.Combine(AppContext.BaseDirectory, "logs");
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var filePathBase = Path.Combine(logDirectory, $"{appName}-.log");
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return host.UseSerilog((context, services, loggerConfig) =>
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{
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loggerConfig
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.MinimumLevel.Information()
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.MinimumLevel.Override("Microsoft.AspNetCore", LogEventLevel.Warning)
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.MinimumLevel.Override("Microsoft.EntityFrameworkCore", LogEventLevel.Warning)
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.Enrich.FromLogContext()
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.Enrich.WithMachineName()
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.Enrich.WithThreadId()
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.WriteTo.Console(
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theme: AnsiConsoleTheme.Code,
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outputTemplate: "[{Timestamp:HH:mm:ss} {Level:u3}] {SourceContext} {Message:lj}{NewLine}{Exception}");
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// Skip the file sink under `dotnet test` so unit-test runs don't scatter log files
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// under SVSim.UnitTests/bin/. See IsTestHost above for why we detect via entry
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// assembly instead of the ASP.NET environment name.
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if (!IsTestHost)
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{
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loggerConfig.WriteTo.File(
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path: filePathBase,
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rollingInterval: RollingInterval.Day,
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rollOnFileSizeLimit: true,
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fileSizeLimitBytes: 100_000_000,
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retainedFileCountLimit: 7,
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outputTemplate: "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level:u3}] {SourceContext} {Message:lj}{NewLine}{Exception}");
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}
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loggerConfig.ReadFrom.Configuration(context.Configuration);
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});
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}
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}
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