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Building a subset of a VS solution at the command line causes MSB4057 #6465

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May 20, 2021
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40 changes: 40 additions & 0 deletions src/Build.UnitTests/Construction/SolutionProjectGenerator_Tests.cs
Original file line number Diff line number Diff line change
Expand Up @@ -175,6 +175,46 @@ public void SolutionFilterFiltersProjects()
}
}

[Fact]
public void BuildProjectAsTarget()
{
using (TestEnvironment testEnvironment = TestEnvironment.Create())
{
TransientTestFolder folder = testEnvironment.CreateFolder(createFolder: true);
TransientTestFolder classLibFolder = testEnvironment.CreateFolder(Path.Combine(folder.Path, "classlib"), createFolder: true);
TransientTestFile classLibrary = testEnvironment.CreateFile(classLibFolder, "classlib.csproj",
@"<Project>
<Target Name=""ClassLibraryTarget"">
<Message Text=""ClassLibraryBuilt""/>
</Target>
</Project>
");

TransientTestFolder simpleProjectFolder = testEnvironment.CreateFolder(Path.Combine(folder.Path, "simpleProject"), createFolder: true);
TransientTestFile simpleProject = testEnvironment.CreateFile(simpleProjectFolder, "simpleProject.csproj",
@"<Project>
<Target Name=""SimpleProjectTarget"">
<Message Text=""SimpleProjectBuilt""/>
</Target>
</Project>
");

TransientTestFile solutionFile = testEnvironment.CreateFile(folder, "testFolder.sln",
@"
Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 16
VisualStudioVersion = 16.6.30114.105
MinimumVisualStudioVersion = 10.0.40219.1
Project(""{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}"") = ""simpleProject"", ""simpleProject\simpleProject.csproj"", ""{AA52A05F-A9C0-4C89-9933-BF976A304C91}""
EndProject
Project(""{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}"") = ""classlib"", ""classlib\classlib.csproj"", ""{80B8E6B8-E46D-4456-91B1-848FD35C4AB9}""
EndProject
");
RunnerUtilities.ExecMSBuild(solutionFile.Path + " /t:classlib", out bool success);
success.ShouldBeTrue();
}
}

/// <summary>
/// Verify the AddNewErrorWarningMessageElement method
/// </summary>
Expand Down
13 changes: 7 additions & 6 deletions src/Build/Construction/Solution/SolutionProjectGenerator.cs
Original file line number Diff line number Diff line change
Expand Up @@ -781,8 +781,9 @@ private void EvaluateAndAddProjects(List<ProjectInSolution> projectsInOrder, Lis
AddTraversalTargetForProject(traversalInstance, project, projectConfiguration, "Rebuild", "BuildOutput", canBuildDirectly);
AddTraversalTargetForProject(traversalInstance, project, projectConfiguration, "Publish", null, canBuildDirectly);

// Add any other targets specified by the user that were not already added
foreach (string targetName in _targetNames.Except(traversalInstance.Targets.Keys, StringComparer.OrdinalIgnoreCase))
// Add any other targets specified by the user that were not already added. A target's presence or absence must be determined at the last
// minute because whether traversalInstance.Targets.ContainsKey(i) is true or not can change during the enumeration.
foreach (string targetName in _targetNames.Where(i => !traversalInstance.Targets.ContainsKey(i)))
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Should we extract method that returns the enumerable? And use it in four places? And add a detailed comment explaining that it has to be lazy because evidently the traversalInstance.Targets contents changes during enumeration? It's a tricky spot.

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also need to pay attention to how Keys behaves - is it returning the live collection or a snapshot of the keys?

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Extract method might be dicey - maybe better keep as is for simplicity... just add comments? You decide

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I want this to be as small of a change and as safe of a change as possible, since this is going into 16.10 rather than 17.0. This is a straight revert of the relevant part of the commit that caused the issue, which is safest in my opinion. Adding a comment is a good plan, though—I'll just add it for the first case, since that's the only one that I know should be just in time.

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Agreed on keeping this to a revert. Can extract as follow up in a future milestone if that's better.

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Yes, let’s not extract, it was just a knee jerk reaction of seeing the changes in four places. All good!

{
AddTraversalTargetForProject(traversalInstance, project, projectConfiguration, targetName, null, canBuildDirectly);
}
Expand All @@ -796,7 +797,7 @@ private void EvaluateAndAddProjects(List<ProjectInSolution> projectsInOrder, Lis
}

// Add any other targets specified by the user that were not already added
foreach (string targetName in _targetNames.Except(traversalInstance.Targets.Keys, StringComparer.OrdinalIgnoreCase))
foreach (string targetName in _targetNames.Where(i => !traversalInstance.Targets.ContainsKey(i)))
{
AddTraversalReferencesTarget(traversalInstance, targetName, null);
}
Expand Down Expand Up @@ -1201,7 +1202,7 @@ private ProjectInstance CreateMetaproject(ProjectInstance traversalProject, Proj
AddMetaprojectTargetForWebProject(traversalProject, metaprojectInstance, project, "Rebuild");
AddMetaprojectTargetForWebProject(traversalProject, metaprojectInstance, project, "Publish");

foreach (string targetName in _targetNames.Except(metaprojectInstance.Targets.Keys, StringComparer.OrdinalIgnoreCase))
foreach (string targetName in _targetNames.Where(i => !metaprojectInstance.Targets.ContainsKey(i)))
{
AddMetaprojectTargetForWebProject(traversalProject, metaprojectInstance, project, targetName);
}
Expand All @@ -1221,7 +1222,7 @@ private ProjectInstance CreateMetaproject(ProjectInstance traversalProject, Proj
AddMetaprojectTargetForManagedProject(traversalProject, metaprojectInstance, project, projectConfiguration, "Rebuild", targetOutputItemName);
AddMetaprojectTargetForManagedProject(traversalProject, metaprojectInstance, project, projectConfiguration, "Publish", null);

foreach (string targetName in _targetNames.Except(metaprojectInstance.Targets.Keys, StringComparer.OrdinalIgnoreCase))
foreach (string targetName in _targetNames.Where(i => !metaprojectInstance.Targets.ContainsKey(i)))
{
AddMetaprojectTargetForManagedProject(traversalProject, metaprojectInstance, project, projectConfiguration, targetName, null);
}
Expand All @@ -1233,7 +1234,7 @@ private ProjectInstance CreateMetaproject(ProjectInstance traversalProject, Proj
AddMetaprojectTargetForUnknownProjectType(traversalProject, metaprojectInstance, project, "Rebuild", unknownProjectTypeErrorMessage);
AddMetaprojectTargetForUnknownProjectType(traversalProject, metaprojectInstance, project, "Publish", unknownProjectTypeErrorMessage);

foreach (string targetName in _targetNames.Except(metaprojectInstance.Targets.Keys, StringComparer.OrdinalIgnoreCase))
foreach (string targetName in _targetNames.Where(i => !metaprojectInstance.Targets.ContainsKey(i)))
{
AddMetaprojectTargetForUnknownProjectType(traversalProject, metaprojectInstance, project, targetName, unknownProjectTypeErrorMessage);
}
Expand Down