Solution isn't updated when excluding project with modifier

Steps to Reproduce

1. Create a .template.config for a solution with multiple projects.
2. Add a symbol/modifier to remove one of these projects.
3. dotnet new, and ensure that the symbol for removing the project is set to true.

Expected Behavior

Because I am excluding an entire directory with a csproj, I expect the folder containing this project to not unfold, and that the solution is updated to remove this project.

Actual Behavior

The folder containing the excluded csproj is not unfolded (as expected), but the solution is not updated to reflect this.

[seancpeters]

For conditionally including / excluding content from a .sln file, the syntax for the conditional statements is:

//#if (<condition>)
//#elseif (<condition>)
//#else
//#endif

…and the corresponding //// versions for conditional uncommenting in conjunction to including or excluding the content.

I created a small solution template with 2 projects in it, and added conditioning based on a boolean parameter called “useOther”. I believe this example will satisfy your needs, @pierceboggan :

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio 15
VisualStudioVersion = 15.0.26613.0
MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Company.ClassLibrary1", "MultiProjectTest\Company.ClassLibrary1.csproj", "{8FD9C741-9EC7-4D23-AE19-8AAFA34F9402}"
EndProject
//#if (useOther)
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OtherProject", "OtherProject\OtherProject.csproj", "{6131A358-96A3-48CF-9DA0-5C1A6EB67BEA}"
EndProject
//#endif
Global
	GlobalSection(SolutionConfigurationPlatforms) = preSolution
		Debug|Any CPU = Debug|Any CPU
		Release|Any CPU = Release|Any CPU
	EndGlobalSection
	GlobalSection(ProjectConfigurationPlatforms) = postSolution
		{8FD9C741-9EC7-4D23-AE19-8AAFA34F9402}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
		{8FD9C741-9EC7-4D23-AE19-8AAFA34F9402}.Debug|Any CPU.Build.0 = Debug|Any CPU
		{8FD9C741-9EC7-4D23-AE19-8AAFA34F9402}.Release|Any CPU.ActiveCfg = Release|Any CPU
		{8FD9C741-9EC7-4D23-AE19-8AAFA34F9402}.Release|Any CPU.Build.0 = Release|Any CPU
//#if (useOther)
		{6131A358-96A3-48CF-9DA0-5C1A6EB67BEA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
		{6131A358-96A3-48CF-9DA0-5C1A6EB67BEA}.Debug|Any CPU.Build.0 = Debug|Any CPU
		{6131A358-96A3-48CF-9DA0-5C1A6EB67BEA}.Release|Any CPU.ActiveCfg = Release|Any CPU
		{6131A358-96A3-48CF-9DA0-5C1A6EB67BEA}.Release|Any CPU.Build.0 = Release|Any CPU
//#endif
	EndGlobalSection
	GlobalSection(SolutionProperties) = preSolution
		HideSolutionNode = FALSE
	EndGlobalSection
	GlobalSection(ExtensibilityGlobals) = postSolution
		SolutionGuid = {09C5699D-670E-48BB-9CCE-5A20A387CC9B}
	EndGlobalSection
EndGlobal

With this setup, if my useOther symbol is set to false, the “OtherProject” statements are excluded from the .sln file.

If you use the same condition(s) in the .sln files as in the sources section of the template.json, the output should be as expected.

Please let me know if you run into any issues using this approach, and we can work through them together to get the results you expect.

[mlorbetske]

Yep, that’d be the approach - to add conditioning to the solution file that keys on the same symbol that’s used in the modifier

@seancpeters can you assist with the syntax for conditions in sln files?