MS Build error - The target "Rebuild" does not exist in the project

Description

Checking out the project and building it using the build.cmd file.

My system info:

• OS: Windows 8.1
• IDE: Visual Studio 2017 Community, with F# support installed

Repro steps

1. Checkout the repository, happens with master (9b1bc25) branch.
2. Open command-line window and navigate to the checkout directory
3. Execute build.cmd

Expected behavior

The build process completes without error.

Actual behavior

An error occurs in MSBuild, details below:

1. Building I:\Projects\OSS\Paket\Paket.sln failed with exitcode 1.
2. MSB4057: I:\Projects\OSS\Paket\tests\Paket.Tests\Paket.Tests.fsproj(0,0): The target “Rebuild” does not exist in the project.
3. MSB4057: I:\Projects\OSS\Paket\src\Paket.Core\Paket.Core.fsproj(0,0): The target “Rebuild” does not exist in the project.
4. MSB4057: I:\Projects\OSS\Paket\src\Paket\Paket.fsproj(0,0): The target “Rebuild” does not exist in the project.
5. MSB4057: I:\Projects\OSS\Paket\integrationtests\Paket.IntegrationTests\Paket.IntegrationTests.fsproj(0,0): The target “Rebuild” does not exist in the proje ct.

The project is being checked out at I:\Projects\OSS\Paket

Known workarounds

None I can think of at the moment.

[Thorium]

To found the issue, I created my own Rebuild-target to the fsproj-file first:

<Target Name="Rebuild">
	<Message Text="Ext = $(MSBuildExtensionsPath)" />
	<Message Text="Tools = $(MSBuildToolsVersion)" />
	<Message Text="msb32 = $(MSBuildExtensionsPath32)" />
	<Message Text="targ = $(TargetFrameworkIdentifier)" />
	<Message Text="fs = $(FSharpTargetsPath)" />
	<Message Text="vs = $(VisualStudioVersion)" />
</Target>  

The issue was that a project file was saying

  <PropertyGroup Condition="'$(VisualStudioVersion)' != '11.0'">
    <FSharpTargetsPath>$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\FSharp\Microsoft.FSharp.Targets</FSharpTargetsPath>
  </PropertyGroup>

but with VS2019 the path was actually in VisualStudio\v$(MSBuildToolsVersion)\FSharp\ and not in VisualStudio\v$(VisualStudioVersion)\FSharp\ so

  <PropertyGroup Condition="'$(VisualStudioVersion)' != '11.0' And Exists('$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\FSharp\')">
    <FSharpTargetsPath>$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\FSharp\Microsoft.FSharp.Targets</FSharpTargetsPath>
  </PropertyGroup>
  <PropertyGroup Condition="'$(VisualStudioVersion)' != '11.0' And Exists('$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(MSBuildToolsVersion)\FSharp\')">
    <FSharpTargetsPath>$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(MSBuildToolsVersion)\FSharp\Microsoft.FSharp.Targets</FSharpTargetsPath>
  </PropertyGroup>  

fixed it.

[Thorium]

Seems to be back when VS2019 is installed.