Using $(SolutionDir) when running template via TextTransform.exe

Question

I\'m trying to get our T4 templates to run at build time, without adding dependencies on the Visual Studio Modeling SDK. I\'ve successfully used a variant of the batch file

Answer 1

Based on piers7 code.

Powershell script Transform.ps1:

Param(
  [string]$variablesPath,
  [string]$t4File,
  [string]$targetfile
)

# Get C:\Program Files (x86)\Common Files
$commonProgramFiles32 = $env:CommmonProgramFiles
if (Test-Path environment::"CommonProgramFiles(x86)") { $commonProgramFiles32 = (gi "Env:CommonProgramFiles(x86)").Value };

# Get path t4 transformer executable
$t4 = Resolve-Path "$commonProgramFiles32\Microsoft Shared\TextTemplating\14.0\texttransform.exe";

# File object for the $t4 file (.tt)
$template = (get-item $t4File)

# Create a dictionary from the contents of system variables file
$vars = @{}
get-content $variablesPath | Foreach-Object {
    $split = $_.split("=")
    $vars.Add($split[0], $split[1])
}

# Temp file name to store the modified template.
$templateTemp = Join-Path ([IO.Path]::GetTempPath()) $template.Name;

# Read the content of the template
$content = [IO.File]::ReadAllText($template.FullName)

# Replace the variables in the template with the actual values.
($vars.Keys | Foreach-Object {
    $content = $content.Replace("`$($_)",$vars[$_])
})

# Write the modified template to the original location
$content > $templateTemp

# Execute the transformation, and delete the temporary template after done.
try{
    & $t4 $templateTemp -out $targetfile -I $template.DirectoryName;
}finally{
    if(Test-Path $templateTemp){ Remove-Item $templateTemp; }
}

# texttransform.exe seems to be messing up the BOM of the file.  Fixing.
[IO.File]::WriteAllText($targetfile, [IO.File]::ReadAllText($targetfile), [System.Text.Encoding]::UTF8)

Then from the pre-build event:

pushd $(ProjectDir)
if exist "$(ProjectDir)var.tmp.txt" del "$(ProjectDir)var.tmp.txt"
echo SolutionDir=$(SolutionDir)>>"$(ProjectDir)var.tmp.txt"
echo ProjectDir=$(ProjectDir)>>"$(ProjectDir)var.tmp.txt"
if exist "$(ProjectDir)my.cs" del "$(ProjectDir)my.cs"
Powershell.exe -ExecutionPolicy Unrestricted -File "..\..\..\Transform.ps1" "$(ProjectDir)var.tmp.txt" "$(ProjectDir)My.tt" "$(ProjectDir)My.cs"
if exist "$(ProjectDir)var.tmp.txt" del "$(ProjectDir)var.tmp.txt"
popd