'LibGit2Sharp.NotFoundException: the ProgramData file 'config' doesn't exist' when pushing on MacOS

Hello,

I am facing this issue on MacOS 15.4.1 Sequoia, Apple M2.

I am trying to push some changes I made, to the remote location but I get the following exception thrown when pushing (cloning and committing the changes obviously worked fine).

There is a .gitconfig in my user home directory with the according user.name & user.email section key value pairs.
Additionally I update the local /.git/config file with these information and manually checked that the file is actually updated.

Is this a bug? And if so, is it related to https://github.com/libgit2/libgit2sharp/issues/2046?

But the more pressing question is, how can I workaround this issue?

Here is the stack trace, saying the config file cannot be found in the program data (which obviously is a windows related naming):

LibGit2Sharp.NotFoundException: the ProgramData file 'config' doesn't exist: 
   at LibGit2Sharp.Core.Ensure.HandleError(Int32 result) in /_/LibGit2Sharp/Core/Ensure.cs:line 154
   at LibGit2Sharp.Core.Ensure.ZeroResult(Int32 result) in /_/LibGit2Sharp/Core/Ensure.cs:line 172
   at LibGit2Sharp.Core.Proxy.git_config_add_file_ondisk(ConfigurationHandle config, FilePath path, ConfigurationLevel level, RepositoryHandle repo) in /_/LibGit2Sharp/Core/Proxy.cs:line 449
   at LibGit2Sharp.Configuration.Init(Repository repository) in /_/LibGit2Sharp/Configuration.cs:line 75
   at LibGit2Sharp.Configuration..ctor(Repository repository, String repositoryConfigurationFileLocation, String globalConfigurationFileLocation, String xdgConfigurationFileLocation, String systemConfigurationFileLocation) in /_/LibGit2Sharp/Configuration.cs:line 49
   at LibGit2Sharp.Repository.<>c__DisplayClass25_1.<.ctor>b__3() in /_/LibGit2Sharp/Repository.cs:line 220
   at System.Lazy`1[[LibGit2Sharp.Configuration, LibGit2Sharp, Version=0.31.0.0, Culture=neutral, PublicKeyToken=7cbde695407f0333]].ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1[[LibGit2Sharp.Configuration, LibGit2Sharp, Version=0.31.0.0, Culture=neutral, PublicKeyToken=7cbde695407f0333]].ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1[[LibGit2Sharp.Configuration, LibGit2Sharp, Version=0.31.0.0, Culture=neutral, PublicKeyToken=7cbde695407f0333]].CreateValue()
   at System.Lazy`1[[LibGit2Sharp.Configuration, LibGit2Sharp, Version=0.31.0.0, Culture=neutral, PublicKeyToken=7cbde695407f0333]].get_Value()
   at LibGit2Sharp.Repository.get_Config() in /_/LibGit2Sharp/Repository.cs:line 323
   at LibGit2Sharp.Branch.UpstreamBranchCanonicalNameFromLocalBranch() in /_/LibGit2Sharp/Branch.cs:line 181
   at LibGit2Sharp.Branch.get_UpstreamBranchCanonicalName() in /_/LibGit2Sharp/Branch.cs:line 155
   at LibGit2Sharp.Network.Push(IEnumerable`1 branches, PushOptions pushOptions) in /_/LibGit2Sharp/Network.cs:line 327
   at LibGit2Sharp.Network.Push(Branch branch, PushOptions pushOptions) in /_/LibGit2Sharp/Network.cs:line 299
   at versioning.MainPageViewModel.CommitAndPushVersionChanges(String repository, String branch, String jiraIssue, String username, String token, String version)

Here is my code to update the local config file:

private static Configuration BuildConfuration(string repositoryLocation, string username, string email) Configuration.BuildFrom(repositoryLocation + "/.git/config", userHomeFolder() + "/.gitconfig");
        configuration.Add("user.name", username);
        configuration.Add("user.email", email, ConfigurationLevel.Local);

Here is the code that produces the exception:

private static void CommitAndPushVersionChanges(string repository, string branch, string email, string username, string token)
{
        using var repo = new Repository(repository);

        // Stage the file
        repo.Index.Add("a.txt");
        repo.Index.Write();

        var configuration = BuildConfiguration(repository, username, email);
        var author = configuration.BuildSignature(DateTimeOffset.Now);

        // Commit & Push to the repository
        repo.Commit($"Commit Message", author, author);
        
        var options = new PushOptions
        {
            CredentialsProvider = (_, _, _) =>
                new UsernamePasswordCredentials
                {
                    Username = "x-token-auth",
                    Password = token
                }
        };

        // EXCEPTION IS THROWN FOR THIS CALL
        repo.Network.Push(repo.Branches[branch], options);
}

Can anybody help?

Cheers
Samir

Reproduce the push on macOS 15.4.1 using the shown Configuration.BuildFrom and Push code. Start with Configuration.cs:75, then trace Repository.cs:220, Branch.cs:181, and Network.cs:327 to determine why the ProgramData config is required. Done means the repository can push without the missing-config exception, with coverage for the reported configuration path.