如何使用nuget.core将nuget包添加到c＃项目文件

Question

I am trying to upgrade a bunch of old c# projects to consume nuget packages that I have made from old assembly dependencies. I want to write a C# program to update all the csproj files to reference the package.

I have the code using nuget.core making a dictionary of dependent assemblies to a nuget package. I can iterate over the references in my project file and find the needed nuget package from my repository.

var localRepo = PackageRepositoryFactory.Default.CreateRepository(nugetCachePath);
var packages = localRepo.GetPackages();
foreach (var package in packages)
{
   foreach (var assemblyReference in package.AssemblyReferences)
   {
        assemblyToPackage.Add(Path.GetFileNameWithoutExtension(assemblyReference.Name).ToLower(),package);
   }               
}

I think I need to use Nuget.Core ProjectManager to add the reference to my project file (csproj).

<ItemGroup>
    <PackageReference Incluse="KB.MyOldAssemblyPackage">
       <Version>1.0.0</Version>
    </PackageReference>
</ItemGroup>

What I can't figure out is how to get an instance of ProjectManager or any examples on how to use it to add the nuget reference. I know I could simply inject the xml with an xdocument but since I made the effort to use nuget.core I was hoping to find a solution using it.

Any help out there?

Answer 1

Short answer. You can't.

The NuGet.Core dll is NuGet 2.x, while PackageReference was introduced in 4.x 4.x has a more modular approach, and there isn't one package you can use to achieve your goal.

If you have Visual Studio 2017, you can use the latest 15.7 release (to be released in 2 weeks or just use the preview) to migrate your packages to PackageReference. That's a built in tool that should handle most of your scenarios if compatible.

If you're really stuck with having to this programmatically the following code should be a great start.

Answer 2

I don't understand what ways to manage packages you use now, but if it's packages.config , then I think better migrate to PackageReference . For it's may use NuGet PackageReference Upgrader that convert your dependencies from packages.config to PackageReference format.

After that you can add/remove our packages with NuGet Package Manager UI extension that built-in in Visual Studio 2017 .

UPD2 . Visual Studio 17 Preview 3 has tool for migrate from packages.config to PackageReference .

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Also MSBuild 15.1 + has built-in NuGet targets such as restore and pack that you can combining with custom build targets. It's make easier build process.

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If you still want to write program to added references to .csproj you can create extension for Visual Studio .

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UPD1 . Get IEnumerable<Project> from GlobalProjectCollection and parse libraries names from the Include attributes:

GetReferences -

public static IEnumerable<string> GetReferences(IEnumerable<Project> project)
{
    return project.Select(p => p.GetItems("Reference").Select(i => i.EvaluatedInclude);
}

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After that check availability this library in your NuGet repository with help your code and if exists, then remove current reference and create new:

CreateReference -

using Microsoft.Build.Evaluation;

using System.Collections.Generic;

namespace NuGetReference
{
    public static class Reference
    {
        public static void CreateReference(string projectName, string packageName, string packageVersion)
        {
            Project project = ProjectCollection.GlobalProjectCollection.LoadProject(projectName);

            project.AddItemFast("PackageReference", packageName, new List<KeyValuePair<string, string>> { new KeyValuePair<string, string>("Version", packageVersion) });

            project.Save();
        }
    }
}

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Migrate from packages.config to PackageReference | Project Class | GlobalProjectCollection | AddItemFast