DotnetHelper.cs

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using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
 
using Tgstation.Server.Host.IO;
 
namespace Tgstation.Server.Host.System
{
    static class DotnetHelper
    {
        public static async ValueTask<string?> GetDotnetPath(IPlatformIdentifier platformIdentifier, IIOManager ioManager, CancellationToken cancellationToken)
        {
            ArgumentNullException.ThrowIfNull(platformIdentifier);
            ArgumentNullException.ThrowIfNull(ioManager);
 
            var dotnetPaths = Common.DotnetHelper.GetPotentialDotnetPaths(platformIdentifier.IsWindows)
                .ToList();
            var tasks = dotnetPaths
                .Select(path => ioManager.FileExists(path, cancellationToken))
                .ToList();
 
            await Task.WhenAll(tasks);
 
            var selectedPathIndex = tasks.FindIndex(pathValidTask => pathValidTask.Result);
 
            if (selectedPathIndex == -1)
                return null;
 
            var dotnetPath = dotnetPaths[selectedPathIndex];
 
            return dotnetPath;
        }
    }
}