如何使用NuGet v3 API下载和解压缩软件包

Question

我一直在使用NuGet.Core包中的以下代码,我在http://blog.nuget.org/20130520/Play-with-packages.html上找到了该代码.

//ID of the package to be looked up
string packageID = "EntityFramework";

//Connect to the official package repository
IPackageRepository repo = PackageRepositoryFactory.Default.CreateRepository("https://packages.nuget.org/api/v2");

//Initialize the package manager string path = <PATH_TO_WHERE_THE_PACKAGES_SHOULD_BE_INSTALLED>
PackageManager packageManager = new PackageManager(repo, path);

//Download and unzip the package
packageManager.InstallPackage(packageID, SemanticVersion.Parse("5.0.0"));

这非常有效,但我必须将框架更新为.NET Core,而NuGet.Core包不支持.我认为NuGet.Protocol.Core.v3包应该有我需要的东西,但是我找不到办法.我在http://daveaglick.com/posts/exploring-the-nuget-v3-libraries-part-1上找到了大量关于NuGet v3 API的信息.

所以我的问题是:如何使用NuGet v3以编程方式下载和解压缩包？

Answer 1

介绍

我在一些项目中使用nuget v2.最近,我测试了nuget v3,因为有很多软件包会抛出错误,表明使用了nuget v3.所以我试着在一个示例项目中测试nuget v3.我不是专家,但下载有效.

项目类型

我找到了3种类型的NuGet项目.

• PackagesConfigNuGetProject
• FolderNuGetProject
• MSBuildNuGetProject

PackagesConfigNuGetProject:

表示由packages.config表示的NuGet项目.

注意:它将在packages.config中下载您的软件包(实际上,它将在packages.config中为您的软件包添加一个条目).您的NuGet包不会在您的磁盘中,只在packages.config中.因此,如果您想获取或使用该DLL,您需要使用FolderNuGetProject#

FolderNuGetProject:

此类表示基于VisualStudio解决方案上的文件夹(如packages文件夹)的NuGetProject.

如果要在磁盘上安装软件包,请使用此类.#

MSBuildNuGetProject:

此类表示基于.NET项目的NuGetProject.这还包含FolderNuGetProject的实例

我不知道你想要使用什么项目类型.在这个例子中,我选择了FolderNuGetProject.

代码示例

1-初始化源存储库

List<Lazy<INuGetResourceProvider>> providers = new List<Lazy<INuGetResourceProvider>>();
providers.AddRange(Repository.Provider.GetCoreV3());

PackageSource packageSource = new PackageSource("https://api.nuget.org/v3/index.json");
SourceRepository sourceRepository = new SourceRepository(packageSource, providers);
Logger logger = new Logger();

2-初始化Nuget包管理器

var rootPath = @"yourPathToNugetFolder";
var settings = Settings.LoadDefaultSettings(rootPath, null, new MachineWideSettings());
var packageSourceProvider = new PackageSourceProvider(settings);
var sourceRepositoryProvider = new SourceRepositoryProvider(packageSourceProvider, providers);

var project = new FolderNuGetProject(rootPath);
var packageManager = new NuGetPackageManager(sourceRepositoryProvider, settings, rootPath)
{
    PackagesFolderNuGetProject = project
};

3-搜索包(在本例中我选择了:Newtonsoft.Json)

var searchResource = await sourceRepository.GetResourceAsync<PackageSearchResource>();
var supportedFramework = new[] { ".NETFramework,Version=v4.6" };
var searchFilter = new SearchFilter(true)
{
    SupportedFrameworks = supportedFramework,
    IncludeDelisted = false
};

var jsonNugetPackages = await searchResource
    .SearchAsync("Newtonsoft.Json", searchFilter, 0, 10, logger, CancellationToken.None);

4-安装软件包(Newtonsoft.Json)

在项目中安装nuget软件包时要小心.它将冻结UI.您应该使用BackgroundWorker或类似的东西来完成该过程.

var allowPrereleaseVersions = true;
var allowUnlisted = false;
INuGetProjectContext projectContext = new ProjectContext();
ResolutionContext resolutionContext = new ResolutionContext(
    DependencyBehavior.Lowest,
    allowPrereleaseVersions,
    allowUnlisted,
    VersionConstraints.None);

var jsonPackage = jsonNugetPackages.First();
var identity = new PackageIdentity(jsonPackage.Identity.Id, jsonPackage.Identity.Version);
await packageManager.InstallPackageAsync(
    project,
    identity,
    resolutionContext,
    projectContext,
    sourceRepository,
    new List<SourceRepository>(),
    CancellationToken.None);

5-实用工具类

public class MachineWideSettings : IMachineWideSettings
{
    private readonly Lazy<IEnumerable<Settings>> _settings;

    public MachineWideSettings()
    {
        var baseDirectory = NuGetEnvironment.GetFolderPath(NuGetFolderPath.MachineWideConfigDirectory);
        _settings = new Lazy<IEnumerable<Settings>>(
            () => global::NuGet.Configuration.Settings.LoadMachineWideSettings(baseDirectory));
    }

    public IEnumerable<Settings> Settings => _settings.Value;
}

public class Logger : ILogger
{
    private List<string> logs = new List<string>();

    public void LogDebug(string data)
    {
        logs.Add(data);
    }

    public void LogVerbose(string data)
    {
        logs.Add(data);
    }

    public void LogInformation(string data)
    {
        logs.Add(data);
    }

    public void LogMinimal(string data)
    {
        logs.Add(data);
    }

    public void LogWarning(string data)
    {
        logs.Add(data);
    }

    public void LogError(string data)
    {
        logs.Add(data);
    }

    public void LogInformationSummary(string data)
    {
        logs.Add(data);
    }

    public void LogErrorSummary(string data)
    {
        logs.Add(data);
    }
}

public class ProjectContext : INuGetProjectContext
{
    private List<string> logs = new List<string>();

    public List<string> GetLogs()
    {
        return logs;
    }

    public void Log(MessageLevel level, string message, params object[] args)
    {
        var formattedMessage = String.Format(message, args);
        logs.Add(formattedMessage);
        // Do your logging here...
    }

    public FileConflictAction ResolveFileConflict(string message)
    {
        logs.Add(message);
        return FileConflictAction.Ignore;
    }


    public PackageExtractionContext PackageExtractionContext
    {
        get;
        set;
    }

    public NuGet.ProjectManagement.ExecutionContext ExecutionContext
    {
        get;
    }

    public XDocument OriginalPackagesConfig
    {
        get; set;
    }

    public ISourceControlManagerProvider SourceControlManagerProvider
    {
        get;
        set;
    }

    public void ReportError(string message)
    {
        logs.Add(message);
    }

    public NuGetActionType ActionType
    {
        get; set;
    }

    public TelemetryServiceHelper TelemetryService
    {
        get; set;
    }
}

希望对你有帮助!