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Order of IHostingStartup Configure calls (#6969)

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Luke Latham 2018-06-12 14:42:40 -05:00 committed by GitHub
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aspnetcore/fundamentals/configuration/platform-specific-configuration.md
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@ -51,7 +51,7 @@ A [HostingStartup](/dotnet/api/microsoft.aspnetcore.hosting.hostingstartupattrib
[!code-csharp[](platform-specific-configuration/snapshot_sample/StartupEnhancement.cs?name=snippet1)] [!code-csharp[](platform-specific-configuration/snapshot_sample/StartupEnhancement.cs?name=snippet1)]
A class implements `IHostingStartup`. The class's [Configure](/dotnet/api/microsoft.aspnetcore.hosting.ihostingstartup.configure) method uses an [IWebHostBuilder](/dotnet/api/microsoft.aspnetcore.hosting.iwebhostbuilder) to add enhancements to an app: A class implements `IHostingStartup`. The class's [Configure](/dotnet/api/microsoft.aspnetcore.hosting.ihostingstartup.configure) method uses an [IWebHostBuilder](/dotnet/api/microsoft.aspnetcore.hosting.iwebhostbuilder) to add enhancements to an app. `IHostingStartup.Configure` in the hosting startup assembly is called by the runtime before `Startup.Configure` in user code, which allows user code to overwrite any configruation provided by the hosting startup assembly.
[!code-csharp[](platform-specific-configuration/snapshot_sample/StartupEnhancement.cs?name=snippet2&highlight=3,5)] [!code-csharp[](platform-specific-configuration/snapshot_sample/StartupEnhancement.cs?name=snippet2&highlight=3,5)]
@ -111,13 +111,15 @@ The shared framework version reflects the version of the shared runtime that the
Set the following environment variables in the context of the app that uses the enhancement. Set the following environment variables in the context of the app that uses the enhancement.
ASPNETCORE\_HOSTINGSTARTUPASSEMBLIES ASPNETCORE_HOSTINGSTARTUPASSEMBLIES
Only hosting startup assemblies are scanned for the `HostingStartupAttribute`. The assembly name of the implementation is provided in this environment variable. The sample app sets this value to `StartupDiagnostics`. Only hosting startup assemblies are scanned for the `HostingStartupAttribute`. The assembly name of the implementation is provided in this environment variable. The sample app sets this value to `StartupDiagnostics`.
The value can also be set using the [Hosting Startup Assemblies](xref:fundamentals/host/web-host#hosting-startup-assemblies) host configuration setting. The value can also be set using the [Hosting Startup Assemblies](xref:fundamentals/host/web-host#hosting-startup-assemblies) host configuration setting.
DOTNET\_ADDITIONAL\_DEPS When multiple hosting startup assembles are present, their [Configure](/dotnet/api/microsoft.aspnetcore.hosting.ihostingstartup.configure) methods are executed in the order that the assemblies are listed.
DOTNET_ADDITIONAL_DEPS
The location of the implementation's *\*.deps.json* file. The location of the implementation's *\*.deps.json* file.