How to put condition code in .ps1 files?

[StevenTCramer]

I have read https://github.com/dotnet/templating/wiki/Conditional-processing-and-comment-syntax#other-file-types

I am trying to conditionally include code based on the boolean web parameter. But when 'web' is set to false the code is still being included.

$Env:ASPNETCORE_ENVIRONMENT = "Development"

Push-Location $PSScriptRoot
try {
  #if(web)
  Push-Location ./Source/ContainerApps/Web/Web.TypeScript
  npm install  
  Pop-Location
  #endif

  Push-Location DevOps/Tye
  tye run --dashboard --watch --logs console -v Debug
  Pop-Location
}
finally {
  Pop-Location
}

[GangWang01]

.ps1 file is the case Other File Types. Note that the conditional expression should be prefixed with // like below.

  //#if(web)
  Push-Location ./Source/ContainerApps/Web/Web.TypeScript
  npm install  
  Pop-Location
  //#endif

[StevenTCramer]

@GangWang01 The comment in Powershell is # not // so the above is not valid powershell.

[GangWang01]

@GangWang01 The comment in Powershell is # not // so the above is not valid powershell.

// is used by Template Engine working together with conditional expression for .ps1 file in the template.
Template Engine removes //#if(web) and //#endif in the template .ps1 file when instantiating the template. The output .ps1 file will not have // included.

Let me know if it doesn't work after your try.

[vlada-shubina]

Suggestion provided by @GangWang01 is very valid.

However, I think we should also consider adding powershell (*.ps1) in single hash comment group so even when conditions are used the file remains correct Powershell.

[StevenTCramer]

When using the // the generated template is correct but now I can no longer use the ps1 script in the template source project.
The goal of dotnet templates is to have them run-able and testable. To accomplish that I think ps1 files do need to be moved into the single hash comment group.

Thanks much for the feedback.