T4 template to generate list of files that are part of the project. This template is useful for generating list of css/js resources to be put in bundle. The value comes from the fact that files which are not part of the project (e.g. - excluded files) will not actually be included in the resulting list.

Resources.tt

// This is an auto-generated file.
<#@ template language="C#" hostSpecific="true" debug="True" #>
<#@ output extension="cs" #>
<#@ assembly name="System.Core" #>
<#@ assembly name="EnvDte" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.IO" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Text.RegularExpressions" #>
<#@ import namespace="System" #>
<#
 /***************************************************************************************************
 T4 template to generate list of files that are part of the project. This template is useful for 
 generating list of css/js resources to be put in bundle. The value comes from the fact that files 
 which are not part of the project (e.g. - excluded files) will not actually be included in the 
 resulting list.
 (https://gist.github.com/niaher/bfa87f0aeda1204091fe)
 ***************************************************************************************************/

  var visualStudio = (this.Host as IServiceProvider).GetService(typeof(EnvDTE.DTE)) as EnvDTE.DTE;
  var project = visualStudio.Solution.FindProjectItem(this.Host.TemplateFile).ContainingProject as EnvDTE.Project;

  string root = Host.ResolvePath("");
  var projectItems = GetProjectItemsRecursively(project.ProjectItems);
#>
public static class Resources
{
	public static string[] AppJavascript = {
<# ListFiles("/Scripts/App", "js", projectItems); #>
	};

	public static string[] AppCss = {
<# ListFiles("/Scripts/App", "css", projectItems); #>
<# ListFiles("/Styles", "css", projectItems); #>
	};
}

<#+
	public void ListFiles(string path, string fileType, List<string> projectItems)
	{
		var root = Host.ResolvePath("");
		
		var fileNames = Directory.EnumerateFiles(root + path, "*." + fileType, SearchOption.AllDirectories)
			.Where(f => !f.EndsWith("intellisense.js"))
			.Select(f => f.Replace("\\", "/"))
			.Where(f => projectItems.Any(p => p.Equals(f, StringComparison.OrdinalIgnoreCase)))
			.Select(f => "~" + f.Substring(root.Length))
			.OrderBy(f => f)
			.ToList();

		foreach(string fileName in fileNames)
		{
			WriteLine(string.Format("\t\t\"{0}\",", fileName));
		}
	}

	public List<string> GetProjectItemsRecursively(EnvDTE.ProjectItems items)
	{
		var ret = new List<string>();
		if (items == null) return ret;

		foreach(EnvDTE.ProjectItem item in items)
		{
			string result = item.FileNames[1].Replace("\\", "/");
			
			// If not folder.
			if (result[result.Length - 1] != '\\')
			{
				ret.Add(result);
			}
						
			ret.AddRange(GetProjectItemsRecursively(item.ProjectItems));
		}

		return ret;
	}
#>