Umbraco-CMS/src/Umbraco.Web.Common/RuntimeMinification/SmidgeHelperAccessor.cs

using System;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Smidge;

namespace Umbraco.Web.Common.RuntimeMinification
{
    // work around for SmidgeHelper being request/scope lifetime
    public sealed class SmidgeHelperAccessor
    {
        private readonly IHttpContextAccessor _httpContextAccessor;

        public SmidgeHelperAccessor(IHttpContextAccessor httpContextAccessor)
        {
            _httpContextAccessor = httpContextAccessor;
        }

        public SmidgeHelper SmidgeHelper
        {
            get
            {
                var httpContext = _httpContextAccessor.HttpContext;
                if (httpContext == null)
                    throw new InvalidOperationException($"Cannot get a {nameof(SmidgeHelper)} instance since there is no current http request");
                return httpContext.RequestServices.GetService<SmidgeHelper>();
            }
        }
    }
}