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app: wire Serilog into SVSim.EmulatedEntrypoint

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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>
This commit is contained in:
gamer147
2026-07-04 02:07:41 -04:00
parent a7843adfe6
commit 9a47ac8d90
4 changed files with 53 additions and 4 deletions
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25
SVSim.Hosting/SerilogHostingExtensions.cs
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@@ -1,3 +1,4 @@
using System.Reflection;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Serilog;
@@ -8,6 +9,14 @@ namespace SVSim.Hosting;
public static class SerilogHostingExtensions
{
// Detects `dotnet test` runs regardless of ASPNETCORE_ENVIRONMENT wiring. The env check
// via HostingEnvironment.IsEnvironment("Testing") is unreliable here because
// WebApplicationFactory<TEntryPoint> sets the environment via a mechanism that fires after
// both CreateBuilder and the UseSerilog callback resolve their environment view. The entry
// assembly under NUnit + dotnet test is always "testhost" or "testhost.x86".
private static readonly bool IsTestHost =
Assembly.GetEntryAssembly()?.GetName().Name?.StartsWith("testhost", StringComparison.OrdinalIgnoreCase) == true;
// Wires Serilog as the host's logging provider. Sinks, rotation, retention,
// and enrichment defaults are baked in here; per-category level overrides
// ride via appsettings under "Serilog:MinimumLevel:Override". The file sink
@@ -28,15 +37,23 @@ public static class SerilogHostingExtensions
.Enrich.WithThreadId()
.WriteTo.Console(
theme: AnsiConsoleTheme.Code,
outputTemplate: "[{Timestamp:HH:mm:ss} {Level:u3}] {SourceContext} {Message:lj}{NewLine}{Exception}")
.WriteTo.File(
outputTemplate: "[{Timestamp:HH:mm:ss} {Level:u3}] {SourceContext} {Message:lj}{NewLine}{Exception}");
// Skip the file sink under `dotnet test` so unit-test runs don't scatter log files
// under SVSim.UnitTests/bin/. See IsTestHost above for why we detect via entry
// assembly instead of the ASP.NET environment name.
if (!IsTestHost)
{
loggerConfig.WriteTo.File(
path: filePathBase,
rollingInterval: RollingInterval.Day,
rollOnFileSizeLimit: true,
fileSizeLimitBytes: 100_000_000,
retainedFileCountLimit: 7,
outputTemplate: "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level:u3}] {SourceContext} {Message:lj}{NewLine}{Exception}")
.ReadFrom.Configuration(context.Configuration);
outputTemplate: "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level:u3}] {SourceContext} {Message:lj}{NewLine}{Exception}");
}
loggerConfig.ReadFrom.Configuration(context.Configuration);
});
}
}