Treasure.Build.CentralBuildOutput

• Treasure.Build.CentralBuildOutput
  • Centrally Managing Build Output
    • Build output
    • Extensibility and configuration
    • Using with artifacts output
  • Controlling SDK versions

The Treasure.Build.CentralBuildOutput MSBuild project SDK allows project tree owners to centralize their build output in one place. By default, build output is placed in the project folder in bin and obj folders. This SDK will cause all of the build output to be written to a common set of folders in a tree structure that mimics the project structure.

This project was heavily inspired by the project SDKs from MSBuildSdks.

For more information about MSBuild project SDKs, see here.

Centrally Managing Build Output

To get started, you will need to create a Directory.Build.props file at the root of your repository if you don't have one already. In that file, you'll need to declare a CentralBuildOutputPath property with the value set to the path of the location you want to write the build output. You'll then need to import the Treasure.Build.CentralBuildOutput SDK.

Example Directory.Build.props:

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <!-- Define the build output location. -->
    <CentralBuildOutputPath>$(MSBuildThisFileDirectory)</CentralBuildOutputPath>
  </PropertyGroup>

  <!-- Import the CentralBuildOutput SDK. -->
  <Sdk Name="Treasure.Build.CentralBuildOutput" Version="3.1.0" />
</Project>

Note:

The version number can be controlled in other ways. See here.

Build output

Note:

When using .NET 8 artifacts output, the build output will be different. See below for more details.

Build output folders written to the location defined by the CentralBuildOutputPath MSBuild property:

Folder Name	Description
__intermediate	The intermediate build output.
__output	The build output.
__packages	The output of packages.
__publish	The published output.
__test-results	The output of test results including Coverlet reports.

You can change the default prefix (__) by setting a new value to the CentralBuildOutputFolderPrefix MSBuild property.

Underneath these build output folders will be a tree structure that matches the tree structure of your project folders.

Consider the following project structure:

/Directory.Build.props
/src/MyClassLibrary/MyClassLibrary.csproj
/src/MyClassLibrary.Tests/MyClassLibrary.Tests.csproj

The relative path between the root of your repository and your project will be calculated. For the structure above, the relative path for MyClassLibrary is src/MyClassLibrary. A Debug build, publish, package, and test output would look like the following:

/__intermediate/src/MyClassLibrary/*
/__intermediate/src/MyClassLibrary.Tests/*
/__output/Debug/AnyCPU/src/MyClassLibrary/net6.0/*
/__output/Debug/AnyCPU/src/MyClassLibrary.Tests/net6.0/*
/__packages/NuGet/Debug/*
/__publish/Debug/AnyCPU/src/MyClassLibrary/*
/__test-results/src/MyClassLibrary.Tests/*

The relative path can be adjusted using the CentralBuildOutputRelativeToPath MSBuild property. For example:

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <!-- Define the build output location. -->
    <CentralBuildOutputPath>$(MSBuildThisFileDirectory)</CentralBuildOutputPath>

    <!-- Adjust the relative path (eliminates the src folder in the build output tree). -->
    <CentralBuildOutputRelativeToPath>$(MSBuildThisFileDirectory)/src</CentralBuildOutputRelativeToPath>
  </PropertyGroup>

  <!-- Import the CentralBuildOutput SDK. -->
  <Sdk Name="Treasure.Build.CentralBuildOutput" Version="3.1.0" />
</Project>

This would result in the following build output:

/__intermediate/MyClassLibrary/*
/__intermediate/MyClassLibrary.Tests/*
/__output/Debug/AnyCPU/MyClassLibrary/net6.0/*
/__output/Debug/AnyCPU/MyClassLibrary.Tests/net6.0/*
/__packages/NuGet/Debug/*
/__publish/Debug/AnyCPU/MyClassLibrary/*
/__test-results/MyClassLibrary.Tests/*

Extensibility and configuration

Setting the following properties controls how Central Build Output works.

Property	Description
CentralBuildOutputPath (Required)	Defines the output path of the build output folders.
CentralBuildOutputConfigPlatLast	Places the configuration and platform at the end of the path if set to true.
CentralBuildOutputFolderPrefix	Overrides the output folder prefix. Default is __.
CentralBuildOutputNoDefaultPlatform	Omits the default platform name in the output path unless necessary if set to true.
CentralBuildOutputNoPlatform	Omits the platform from the output path if set to true.
CentralBuildOutputRelativeToPath	Redefines the root folder used to calculate the relative folder used in build output folders.
CustomBeforeCentralBuildOutputProps	A list of custom MSBuild projects to import before central build output properties are declared.
CustomAfterCentralBuildOutputProps	A list of custom MSBuild projects to import after central build output properties are declared.
CustomBeforeCentralBuildOutputTargets	A list of custom MSBuild projects to import before central build output targets are declared.
CustomAfterCentralBuildOutputTargets	A list of custom MSBuild projects to import after central build output targets are declared.
EnableCentralBuildOutput	Indicates whether central build output is enabled or not. Set to false to disable.

Using with artifacts output

Since .NET 8's new artifacts output accomplishes many of the same goals as Treasure.Build.CentralBuildOutput, the SDK will behave differently when used in conjunction with artifacts output. Specifically, no changes will be made to artifacts output except that test results and coverlet code coverage output will be output to a test-results directory underneath the artifacts output path.

Artifacts output can be enabled by setting:

<UseArtifactsOutput>true</UseArtifactsOutput>

The artifact output path can also be configured by setting the ArtifactsPath property:

<ArtifactsPath>$(MSBuildThisFileDirectory)__artifacts</ArtifactsPath>

The ArtifactsPath property would be used instead of setting the CentralBuildOutputPath property. None of the CentralBuildOutput* properties defined in extensibility and configuration will have any effect, but the rest still work.

A simple example Directory.Build.props would be:

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <!-- Define the build output location. -->
    <UseArtifactsOutput>true</UseArtifactsOutput>
    <ArtifactsPath>$(MSBuildThisFileDirectory)__artifacts</ArtifactsPath>
  </PropertyGroup>

  <!-- Import the CentralBuildOutput SDK. -->
  <Sdk Name="Treasure.Build.CentralBuildOutput" Version="3.1.0" />
</Project>

Controlling SDK versions

For more detailed information, see the MSBuild documentation.

When using an MSBuild Project SDK obtained via NuGet (such as the SDK in this repo) a specific version must be specified.

Specify the version number as an attribute of the SDK import:

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  ...
  <Sdk Name="Treasure.Build.CentralBuildOutput" Version="3.1.0" />
  ...
</Project>

Or, omit the version from the SDK attribute and specify it in the version in global.json, which can be useful to synchronize versions across multiple projects in a solution:

{
  ...
  "msbuild-sdks": {
    "Treasure.Build.CentralBuildOutput" : "3.1.0"
  }
}