Answer by Maytham Fahmi for Could not find a part of the path ... bin\roslyn\csc.exe

In my case I have had issue in Jenkins when it tried to deploying it in Octopus with following error:

MSBUILD : OctoPack error OCT-1676060969: Failed to build the path for '\bin\roslyn\csc.exe' relative to 'T:\workspace\machine.engine\Machine.engine.Test': Invalid URI: The format of the URI could not be determined.. See the inner exception for more details. [T:\workspace\machine.engine\Machine.engine.Test\Machine.engine.Test.csproj]MSBUILD : OctoPack error OCT-1676060969: System.Exception: Failed to build the path for '\bin\roslyn\csc.exe' relative to 'T:\workspace\machine.engine\Machine.engine.Test': Invalid URI: The format of the URI could not be determined.. See the inner exception for more details. ---> System.UriFormatException: Invalid URI: The format of the URI could not be determined. [T:\workspace\machine.engine\Machine.engine.Test\Machine.engine.Test.csproj]MSBUILD : OctoPack error OCT-1676060969:    at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind) [T:\workspace\machine.engine\Machine.engine.Test\Machine.engine.Test.csproj]MSBUILD : OctoPack error OCT-1676060969:    at System.Uri..ctor(String uriString) [T:\workspace\machine.engine\Machine.engine.Test\Machine.engine.Test.csproj]MSBUILD : OctoPack error OCT-1676060969:    at OctoPack.Tasks.Util.OctopusPhysicalFileSystem.GetPathRelativeTo(String fullPath, String relativeTo) in Z:\buildAgent\workDir\20ba9f2e0d5e4022\source\OctoPack.Tasks\Util\OctopusPhysicalFileSystem.cs:line 211 [T:\workspace\machine.engine\Machine.engine.Test\Machine.engine.Test.csproj]MSBUILD : OctoPack error OCT-1676060969:    --- End of inner exception stack trace --- [T:\workspace\machine.engine\Machine.engine.Test\Machine.engine.Test.csproj]MSBUILD : OctoPack error OCT-1676060969:    at OctoPack.Tasks.Util.OctopusPhysicalFileSystem.GetPathRelativeTo(String fullPath, String relativeTo) in Z:\buildAgent\workDir\20ba9f2e0d5e4022\source\OctoPack.Tasks\Util\OctopusPhysicalFileSystem.cs:line 224 [T:\workspace\machine.engine\Machine.engine.Test\Machine.engine.Test.csproj]MSBUILD : OctoPack error OCT-1676060969:    at OctoPack.Tasks.CreateOctoPackPackage.AddFiles(XContainer nuSpec, IEnumerable`1 sourceFiles, String sourceBaseDirectory, String targetDirectory, String relativeTo) in Z:\buildAgent\workDir\20ba9f2e0d5e4022\source\OctoPack.Tasks\CreateOctoPackPackage.cs:line 443 [T:\workspace\machine.engine\Machine.engine.Test\Machine.engine.Test.csproj]MSBUILD : OctoPack error OCT-1676060969:    at OctoPack.Tasks.CreateOctoPackPackage.Execute() in Z:\buildAgent\workDir\20ba9f2e0d5e4022\source\OctoPack.Tasks\CreateOctoPackPackage.cs:line 190 [T:\workspace\machine.engine\Machine.engine.Test\Machine.engine.Test.csproj]Done Building Project "T:\workspace\machine.engine\Machine.engine.Test\Machine.engine.Test.csproj" (default targets) -- FAILED

Cause

After spending some time, I was using an internal developed component that was using Microsoft.Net.Compilers. The reason the internal component was using Microsoft.Net.Compilers was to overcome this issue (C#: throw invalid expression compilation) and was solved this way (How to use C# 7 with Visual Studio 2015?). This result in, when I installed the component on the main program, the Microsoft.Net.Compilers get added it selves automatically.

Solution

My work around was, uninstall following from our internal component by (following @malikKhalil answer)

PM> Uninstall-package Microsoft.CodeDom.Providers.DotNetCompilerPlatformPM> Uninstall-package Microsoft.Net.Compilers

And chose C# 7 compiler in Jenkins instead of C# 6 and rebuild, this is to ensure everything is working and building correctly.

Than finally in my main program I tried to update my internal component. And everything than build again. It has built without any problems or issues.