T4 Get Current Working Directory of Solution

Question

I am using T4 in Visual Studio 2010, and I want to iterate over the files in my solution, however I have found that T4 source generation works in a kind of a sandbox, and the cu

Answer 1

Here's the how to use the logic JCallico provided in a T4 template that creates an XML file:

<#@ template debug="false" hostspecific="true" language="C#" #><# /* hostspecific must be set to "true" in order to access Visual Studio project properties. */ #>
<#@ assembly name="System.Core" #>
<#@ import namespace="System.Text" #>
<#@ output extension=".xml" #>
<#@ assembly name="EnvDTE" #><# /* This assembly provides access to Visual Studio project properties. */ #>
<#
    var serviceProvider = this.Host as IServiceProvider;
    var dte = serviceProvider.GetService(typeof(EnvDTE.DTE)) as EnvDTE.DTE;
    var solutionDirectory = System.IO.Path.GetDirectoryName(dte.Solution.FullName);
#>
<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <mySetting filePath="<#= solutionDirectory #>\MySubfolder\MyFile.exe" />
</configuration>

The XML attribute "filePath" will equal the Visual Studio's solution directory plus "\MySubfolder\MyFile.exe".

Answer 2

You must set the hostspecific attribute to true like so:

<#@ template language="C#" hostspecific="True" #>

The ITextTemplatingEngineHost interface will give you the information you need.

<#= this.Host.ResolveParameterValue("-", "-", "projects") #>

I don't believe there is a way to reference the solution, but you can get the path in which your *.tt file is and from there get other files.

To load a file from a location relative to the text template, you can use this:

this.Host.ResolvePath("relative/path.txt")

Answer 3

This is the method I use to get the solution base directory:

public string GetSolutionDirectory()
{
    var serviceProvider = this.Host as IServiceProvider;
    var dte = serviceProvider.GetService(typeof(EnvDTE.DTE)) as EnvDTE.DTE;
    return System.IO.Path.GetDirectoryName(dte.Solution.FullName);
}