Unable to retrieve package list Mac OS.

[jbvirt]

Description

I just added NuGetForUnity to a new project on Mac and am getting this error when trying to view the package list.

Unable to retrieve package list from https://api.nuget.org/v3/index.jsonSearch()?$filter=IsLatestVersion&$orderby=DownloadCount desc&$skip=0&$top=15&searchTerm=''&targetFramework=''&includePrerelease=false
System.ComponentModel.Win32Exception (0x80004005): ApplicationName='/Users/jbvirt/.local/share/Nuget/CredentialProviders/CredentialProvider.VSS.exe', CommandLine='-uri "https://api.nuget.org/v3"', CurrentDirectory='', Native error= Cannot find the specified file
  at System.Diagnostics.Process.StartWithCreateProcess (System.Diagnostics.ProcessStartInfo startInfo) [0x002f9] in <7b6d8d819f484934aae999cadeaf7aa9>:0 
  at System.Diagnostics.Process.Start () [0x0003a] in <7b6d8d819f484934aae999cadeaf7aa9>:0 
  at (wrapper remoting-invoke-with-check) System.Diagnostics.Process.Start()
  at NugetForUnity.NugetHelper.GetCredentialFromProvider_Uncached (System.Uri feedUri, System.Boolean downloadIfMissing) [0x0016c] in ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetHelper.cs:1667 
  at NugetForUnity.NugetHelper.GetCredentialFromProvider (System.Uri feedUri) [0x0000f] in ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetHelper.cs:1577 
  at NugetForUnity.NugetHelper.RequestUrl (System.String url, System.String userName, System.String password, System.Nullable`1[T] timeOut) [0x00062] in ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetHelper.cs:1350 
  at NugetForUnity.NugetPackageSource.GetPackagesFromUrl (System.String url, System.String username, System.String password) [0x00026] in ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetPackageSource.cs:394 
  at NugetForUnity.NugetPackageSource.Search (System.String searchTerm, System.Boolean includeAllVersions, System.Boolean includePrerelease, System.Int32 numberToGet, System.Int32 numberToSkip) [0x000cd] in ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetPackageSource.cs:284 
UnityEngine.Debug:LogErrorFormat (string,object[])
NugetForUnity.NugetPackageSource:Search (string,bool,bool,int,int) (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetPackageSource.cs:288)
NugetForUnity.NugetHelper:Search (string,bool,bool,int,int) (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetHelper.cs:886)
NugetForUnity.NugetWindow:UpdateOnlinePackages () (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetWindow.cs:357)
NugetForUnity.NugetWindow:Refresh (bool) (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetWindow.cs:326)
NugetForUnity.NugetWindow:OnEnable () (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetWindow.cs:289)
UnityEditor.EditorWindow:GetWindow<NugetForUnity.NugetWindow> ()
NugetForUnity.NugetWindow:DisplayNugetWindow () (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@f9fb82dbaa/Editor/NugetWindow.cs:165)

• NuGet Package: N/A
• NuGetForUnity Version: v3.1.3
• Unity Version: 2022.3.9f1 (Apple Silicon)
• Operating System: Mac OS Sonoma 14 (M1)

[JoC0de]

Not sure what you have configured but the base URL is a API version 3 but from the trace I can see that you are using the NuGetForUnity version that only supports API version 2. The NuGetForUnity version that support API version 3 is currently in "beta".
Your issue can be solved by deleting the NuGet.config so it gets recreated with the correct default values.

[jbvirt]

Thank you for the reply, however this happened in a fresh project, and also happens with the head version of NuGetForUnity as well as v3.1.3. Are you saying that these versions don't have any support for v3 on Mac? Because they work fine on Windows.

The default NuGet path that is configured fro nuget.org is: https://api.nuget.org/v3/index.json
The old API path at https://www.nuget.org/api/v2/ no longer seems to return any packages. Edit: I see, it's just old and confusing.

From the error, it looks like NuGet For Unity is trying to run a Windows .exe on mac.

[jbvirt]

I get the same type of error even on v3.0.5 and using the v2 NuGet API:

Unable to retrieve package from https://www.nuget.org/api/v2/Packages(Id='System.Runtime.CompilerServices.Unsafe',Version='6.0.0')
System.ComponentModel.Win32Exception (0x80004005): ApplicationName='/Users/jbvirt/.local/share/Nuget/CredentialProviders/CredentialProvider.VSS.exe', CommandLine='-uri "https://www.nuget.org/api/v2"', CurrentDirectory='', Native error= Cannot find the specified file
  at System.Diagnostics.Process.StartWithCreateProcess (System.Diagnostics.ProcessStartInfo startInfo) [0x002f9] in <7b6d8d819f484934aae999cadeaf7aa9>:0 
  at System.Diagnostics.Process.Start () [0x0003a] in <7b6d8d819f484934aae999cadeaf7aa9>:0 
  at (wrapper remoting-invoke-with-check) System.Diagnostics.Process.Start()
  at NugetForUnity.NugetHelper.GetCredentialFromProvider_Uncached (System.Uri feedUri, System.Boolean downloadIfMissing) [0x0016c] in ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetHelper.cs:1896 
  at NugetForUnity.NugetHelper.GetCredentialFromProvider (System.Uri feedUri) [0x0000f] in ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetHelper.cs:1806 
  at NugetForUnity.NugetHelper.RequestUrl (System.String url, System.String userName, System.String password, System.Nullable`1[T] timeOut) [0x00062] in ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetHelper.cs:1508 
  at NugetForUnity.NugetPackageSource.GetPackagesFromUrl (System.String url, System.String username, System.String password) [0x00026] in ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetPackageSource.cs:367 
  at NugetForUnity.NugetPackageSource.GetSpecificPackage (NugetForUnity.NugetPackageIdentifier package) [0x00074] in ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetPackageSource.cs:194 
UnityEngine.Debug:LogErrorFormat (string,object[])
NugetForUnity.NugetPackageSource:GetSpecificPackage (NugetForUnity.NugetPackageIdentifier) (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetPackageSource.cs:198)
NugetForUnity.NugetHelper:GetOnlinePackage (NugetForUnity.NugetPackageIdentifier) (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetHelper.cs:1165)
NugetForUnity.NugetHelper:GetSpecificPackage (NugetForUnity.NugetPackageIdentifier) (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetHelper.cs:1084)
NugetForUnity.NugetHelper:InstallIdentifier (NugetForUnity.NugetPackageIdentifier,bool) (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetHelper.cs:1231)
NugetForUnity.NugetHelper:Restore () (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetHelper.cs:1563)
NugetForUnity.NugetHelper:.cctor () (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetHelper.cs:149)
NugetForUnity.NugetPackageAssetPostprocessor:GetNuGetRepositoryPath () (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetPackageAssetPostprocessor.cs:104)
NugetForUnity.NugetPackageAssetPostprocessor:OnPreprocessAsset () (at ./Library/PackageCache/com.github-glitchenzo.nugetforunity@620a6ce1e3/Editor/NugetPackageAssetPostprocessor.cs:46)
UnityEditor.AssetPostprocessingInternal:PreprocessAsset () (at /Users/bokken/build/output/unity/unity/Editor/Mono/AssetPostprocessor.cs:716)

Yet https://www.nuget.org/api/v2/Packages(Id='System.Runtime.CompilerServices.Unsafe',Version='6.0.0') very much exists.

[jbvirt]

I also get this error using the CLI tool:

Unable to retrieve package from https://www.nuget.org/api/v2/Packages(Id='System.Runtime.CompilerServices.Unsafe',Version='6.0.0')
System.NotSupportedException: No data is available for encoding 850. For information on defining a custom encoding, see the documentation for the Encoding.RegisterProvider method.
   at System.Text.Encoding.GetEncoding(Int32 codepage)
   at NugetForUnity.NugetHelper.GetCredentialFromProvider_Uncached(Uri feedUri, Boolean downloadIfMissing) in /home/runner/work/NuGetForUnity/NuGetForUnity/src/NuGetForUnity/Editor/NugetHelper.cs:line 1666
   at NugetForUnity.NugetHelper.GetCredentialFromProvider(Uri feedUri) in /home/runner/work/NuGetForUnity/NuGetForUnity/src/NuGetForUnity/Editor/NugetHelper.cs:line 1577
   at NugetForUnity.NugetHelper.RequestUrl(String url, String userName, String password, Nullable`1 timeOut) in /home/runner/work/NuGetForUnity/NuGetForUnity/src/NuGetForUnity/Editor/NugetHelper.cs:line 1350
   at NugetForUnity.NugetPackageSource.GetPackagesFromUrl(String url, String username, String password) in /home/runner/work/NuGetForUnity/NuGetForUnity/src/NuGetForUnity/Editor/NugetPackageSource.cs:line 394
   at NugetForUnity.NugetPackageSource.GetSpecificPackage(NugetPackageIdentifier package) in /home/runner/work/NuGetForUnity/NuGetForUnity/src/NuGetForUnity/Editor/NugetPackageSource.cs:line 211
Could not find System.Runtime.CompilerServices.Unsafe 6.0.0 or greater.

[JoC0de]

The error seems to come from

NuGetForUnity/src/NuGetForUnity/Editor/Helper/CredentialProviderHelper.cs

Line 158 in 1138f26

process.StartInfo.StandardOutputEncoding = Encoding.GetEncoding(850);

It uses a encoding that is only available on windows.
But normally the code should not run, if you don't have a credential provider lying around on your Mac. It searches in the environment variable NUGET_CREDENTIALPROVIDERS_PATH and in the Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Nuget", "CredentialProviders")). So if you delete the files inside this folders it should work.

[jbvirt]

Thanks, renaming/deleting that file seemed to fix both issues. There definitely should be a check to verify that the file is actually executable before using it.

It seems that NuGetForUnity keeps regenerating that file as well.

[jbvirt]

Yeah the issue is that CredentialProvider.VSS.exe is constantly regenerated and attempted to be used on mac.

[JoC0de]

As far as I can see the file isn't downloaded / created it already exists. It is only downloaded if you use azure package source.

[jbvirt]

That would partially explain it then, we do use a package from: https://pkgs.dev.azure.com/UnityDeveloperTools/MSBuildForUnity/_packaging/UnityDeveloperTools/nuget/v2/

Then I guess the simplest fix would be to check if CredentialProvider.VSS.exe is actually executable on the provided os (check for executable flag).
I was able to work around this issue consistently by just changing the owner of the CredentialProvider's folder to be root.

[JoC0de]

I fixed the issue in #575. I don't have a Mac to test if it works, so it would be nice if you can test if it fixes the issue? You can install it using the .unitypackage build by the Github Action or by installing the package from the PR branch using UPM Git-Url.

[jbvirt]

This seems to have fixed the issues, thanks!

[JoC0de]

@jbvirt Thanks for testing