stimpy77/PowerShell_via_MSBuild.md

## PowerShell_via_MSBuild.md

      
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              PowerShell_via_MSBuild.md
            
          
    #How to richly enable a PowerShell script in a C# project to run in MSBuild


Open the .csproj file in Notepad++ (or, right-click the project, choose "Unload Project", then right-click it again and choose "Edit")


Paste the following before the </Project> tag at the end:
 <UsingTask TaskName="InvokePowerShell" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v$(MSBuildToolsVersion).dll">
   <ParameterGroup>
       <ScriptFile ParameterType="System.String" Required="true" />
     </ParameterGroup>
     <Task>
       <Reference Include="Microsoft.Build" />
       <Reference Include="System.Management.Automation" />
       <Reference Include="System.Xml" />
       <Using Namespace="System.Management.Automation" />
       <Using Namespace="System.Management.Automation.Runspaces" />
       <Using Namespace="Microsoft.Build.Evaluation" />
       <Code Type="Fragment" Language="cs"><![CDATA[
       if (!ScriptFile.ToLower().EndsWith(".ps1")) return true;
     Project project = ProjectCollection.GlobalProjectCollection.GetLoadedProjects(BuildEngine.ProjectFileOfTaskNode).FirstOrDefault()
         ?? new Project(BuildEngine.ProjectFileOfTaskNode);
     if (!ScriptFile.Contains("\\")) ScriptFile = project.DirectoryPath + "\\" + ScriptFile;
     var runspaceConfig = RunspaceConfiguration.Create();
     using (Runspace runspace = RunspaceFactory.CreateRunspace(runspaceConfig)) 
     { 
         runspace.Open();
         var vars = new System.Text.StringBuilder();
         foreach (ProjectProperty evaluatedProperty in project.AllEvaluatedProperties)
         {
 	        if (!evaluatedProperty.IsEnvironmentProperty)
 	        {
 		        var name = evaluatedProperty.Name;
 		        var value = evaluatedProperty.EvaluatedValue;
 		        if (!string.IsNullOrWhiteSpace(name))
 		        {
 			        if (!string.IsNullOrWhiteSpace(value))
 			        {
 				        if (value.ToLower() == "true" || value.ToLower() == "false") {
 					        vars.AppendLine("$" + name + " = $" + value);
 				        } else {
 					        vars.AppendLine("$" + name + " = @\"\r\n" + value.Replace("\"", "\"\"") + "\r\n\"@");
 				        }
 			        }
 		        }
 	        }
         }
         using (RunspaceInvoke scriptInvoker = new RunspaceInvoke(runspace)) 
         { 
             using (Pipeline pipeline = runspace.CreatePipeline()) {
 		        scriptInvoker.Invoke(vars.ToString()); 
 		        BuildEngine.LogMessageEvent(new BuildMessageEventArgs(ScriptFile, "", "", MessageImportance.High));
 		        pipeline.Commands.AddScript("& \"" + ScriptFile + "\""); 
 		        try {
 			        var results = pipeline.Invoke();
 			        string soutput = "";
 			        foreach (var result in results)
 			        {
 				        soutput += result.ToString();
 			        }
 			        BuildEngine.LogMessageEvent(new BuildMessageEventArgs(soutput, "", "", MessageImportance.High));
 		        } catch (Exception e) {
 			        BuildEngine.LogErrorEvent(new BuildErrorEventArgs("", "", ScriptFile, 0, 0, 0, 0, e.ToString(), "", "", DateTime.Now));
 			        throw;
 		        }
 	        }
         } 
     }
     return true;
 ]]></Code>
     </Task>
   </UsingTask>
   <ItemGroup>
     <AvailableItemName Include="InvokeBefore">
       <Visible>false</Visible>
     </AvailableItemName>
     <AvailableItemName Include="InvokeAfter">
       <Visible>false</Visible>
     </AvailableItemName>
   </ItemGroup>
   <Target Name="PSScriptsBefore" BeforeTargets="Build">
     <InvokePowerShell ScriptFile="%(InvokeBefore.Identity)" Condition="'@(InvokeBefore)' != ''" />
   </Target>
   <Target Name="PSScriptsAfter" AfterTargets="Build">
     <InvokePowerShell ScriptFile="%(InvokeAfter.Identity)" Condition="'@(InvokeAfter)' != ''" />
   </Target>


Reload the project


Add a .ps1 file to the project (tip: add a text file as "MyScript.txt", then rename it to "MyScript.ps1")


Right-click on the file, choose Properties, and set the Build Action to "InvokeBefore" or "InvokeAfter".


Open the file and enter echo "$Configuration $AssemblyName $MSBuildProjectDirectory" .. note that this means that ALL MSBuild properties are exposed to you.