GitLab Repositories with dots result in wrong paths for the SARIF converter

[SeWieland]

dotnet_gitlab_code_quality/CodeQualityToGitlab/SarifConverters/Converter1.cs

Line 87 in 63ec7e8

return uri.MakeRelativeUri(begin.ResultFile.Uri).ToString().Replace("//", "\\");

If the project path contains any dots, e.g.: /builds/my_group/ns.myproject the roslynator converter correctly transforms the root paths.

However the Sarif Converters make use of the MakeRelativeUri function, which will treat the string wrong.

I suggest using something more robust like

var uri = new Uri(pathRoot);
var absolutePath = begin.ResultFile.Uri.LocalPath;
var rootPath = uri.LocalPath;

if (absolutePath.StartsWith(rootPath))
{
   return absolutePath.Substring(rootPath.Length).Replace("//", "\\");
}

return begin.ResultFile.Uri.MakeRelativeUri(uri).ToString().Replace("//", "\\");