Accessing the IHostingEnvironment in static main of ASP.NET Core

After some discussion on aspnetcore.slack.com in the #general channel (May 26,2016 12:25pm), David Fowler said "you can new up the webhostbuilder and call getsetting(“ environment”)" and "hosting config != app config".

var h = new WebHostBuilder();
var environment = h.GetSetting("environment");
var builder = new ConfigurationBuilder()
        .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
        .AddJsonFile($"appsettings.{environment}.json", optional: true)
        .AddEnvironmentVariables();
var configuration = builder.Build();

If you want to store the password for the Https certificate finally in the User Secrets add the following lines in the appropriate sections in Main of Program.cs:

var config = new ConfigurationBuilder()
    .AddUserSecrets("your-user-secrets-id") //usually in project.json

var host = new WebHostBuilder()
    .UseConfiguration(config)
            .UseKestrel(options=> {
                options.UseHttps("certificate.pfx", config["your-user-secrets-id"]);
            })

The user secrets have to be passed in directly, because the configuration of project.json for "userSecretsId" is not yet accessible at this stage.