Solution project passthrough doesn't support calling Build directly

[rainersigwald]

Steps to reproduce

With a simple solution

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio 15
VisualStudioVersion = 15.0.27130.2010
MinimumVisualStudioVersion = 15.0.26124.0
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "proj1", "proj1\proj1.csproj", "{41A1218F-E59D-4AC9-9741-AC6356D0880B}"
EndProject
Global
        GlobalSection(SolutionConfigurationPlatforms) = preSolution
                Release|Any CPU = Release|Any CPU
                Release|x64 = Release|x64
                Release|x86 = Release|x86
        EndGlobalSection
        GlobalSection(ProjectConfigurationPlatforms) = postSolution
                {41A1218F-E59D-4AC9-9741-AC6356D0880B}.Release|Any CPU.ActiveCfg = Release|Any CPU
                {41A1218F-E59D-4AC9-9741-AC6356D0880B}.Release|Any CPU.Build.0 = Release|Any CPU
                {41A1218F-E59D-4AC9-9741-AC6356D0880B}.Release|x64.ActiveCfg = Release|Any CPU
                {41A1218F-E59D-4AC9-9741-AC6356D0880B}.Release|x64.Build.0 = Release|Any CPU
                {41A1218F-E59D-4AC9-9741-AC6356D0880B}.Release|x86.ActiveCfg = Release|Any CPU
                {41A1218F-E59D-4AC9-9741-AC6356D0880B}.Release|x86.Build.0 = Release|Any CPU
        EndGlobalSection
        GlobalSection(SolutionProperties) = preSolution
                HideSolutionNode = FALSE
        EndGlobalSection
        GlobalSection(ExtensibilityGlobals) = postSolution
                SolutionGuid = {4CDA96E1-5FDA-460E-811F-4C2D0BF46566}
        EndGlobalSection
EndGlobal

Attempt to build the Build target of the project explicitly

msbuild simple_proj.sln /t:proj1:Build

Expected behavior

Builds the Build target in proj1.csproj

Actual behavior

C:\Users\raines\source\repos\simple_proj\simple_proj.sln.metaproj : error MSB4057: The target "proj1:Build" does not exist in the project. [C:\Users\raines\source\repos\simple_proj\simple_proj.sln]

Environment data

MSBuild 15.5.180.51428

[cowlinator]

I confirm that the /t:<project>:<build-target> format works when the build-target is
Rebuild,
Clean,
Run,
Publish,
PublishOnly,
ResolveReferences,
ResolveProjectReferences,
ResolveAssemblyReferences,
GenerateBindingRedirects,
PrepareResources,
ResGen,
Compile,
GenerateManifests,
PrepareForRun, or
CopyFilesToOutputDirectory,
but not when the build-target is
Build.
This is especially problematic when the project's DefaultTargets property is not known. For example, a script which executes msbuild with the "target" argument in the /t:<project>:<build-target> format for any arbitrary project.

MSBuild 15.9.21+g9802d43bc3

[cowlinator]

@rainersigwald, what are the chances that we can get someone to look into this?

[rainersigwald]

It's not currently very high on our list @cowlinator, but I'll mark it as up-for-grabs. Are you interested in contributing a fix?