dotnet-installer/src/Microsoft.DotNet.Configurer/DotnetFirstTimeUseConfigurer.cs

// Copyright (c) .NET Foundation and contributors. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.

using System.IO;
using Microsoft.DotNet.Cli.Utils;
using Microsoft.Extensions.EnvironmentAbstractions;

namespace Microsoft.DotNet.Configurer
{
    public class DotnetFirstTimeUseConfigurer
    {
        private INuGetCachePrimer _nugetCachePrimer;
        private INuGetCacheSentinel _nugetCacheSentinel;

        public DotnetFirstTimeUseConfigurer(INuGetCachePrimer nugetCachePrimer, INuGetCacheSentinel nugetCacheSentinel)
        {
            _nugetCachePrimer = nugetCachePrimer;
            _nugetCacheSentinel = nugetCacheSentinel;
        }

        public void Configure()
        {
            if(ShouldPrimeNugetCache())
            {
                PrintFirstTimeUseNotice();

                _nugetCachePrimer.PrimeCache();
            }
        }

        private void PrintFirstTimeUseNotice()
        {
            Reporter.Output.WriteLine();
            Reporter.Output.WriteLine("Welcome to .NET Core!");
            Reporter.Output.WriteLine("---------------------");
            Reporter.Output.WriteLine("Learn more about .NET Core @ https://aka.ms/dotnet-docs. " +
                "Use dotnet --help to see available commands or go to https://aka.ms/dotnet-cli-docs.");
            Reporter.Output.WriteLine("Telemetry");
            Reporter.Output.WriteLine("--------------");
            Reporter.Output.WriteLine("The .NET Core tools collect usage data in order to improve your experience. " +
                "The data is anonymous and does not include commandline arguments. " +
                "The data is collected by Microsoft and shared with the community.");
            Reporter.Output.WriteLine();
            Reporter.Output.WriteLine("You can opt out of telemetry by setting a DOTNET_CLI_TELEMETRY_OPTOUT " +
                "environment variable to 1 using your favorite shell.");
            Reporter.Output.WriteLine("You can read more about .NET Core tools telemetry @ https://aka.ms/dotnet-cli-telemetry.");
            Reporter.Output.WriteLine("Configuring...");
            Reporter.Output.WriteLine("-------------------");
            Reporter.Output.WriteLine("A command is running to initially populate your local package cache, to improve restore" +
                "speed and enable offline access. This command will take up to a minute to complete and will only happen once.");
        }

        private bool ShouldPrimeNugetCache()
        {
            return !_nugetCacheSentinel.Exists();
        }
    }
}