Question

我一直在尝试编写一个MsBuild任务来自动从Feed网址获取Nuget包，并自动更新packages.config以更新到最新版本。

 // ---- Download and install a package at a desired path ----
  var sourceUri = new Uri("FEED URL");

  // ---- Update the ‘packages.config’ file ----
  var packageReferenceFile = new PackageReferenceFile("../../packages.config");
  string packagesPath = "../../packages";
  IPackageRepository sourceRepository = PackageRepositoryFactory.Default.CreateRepository(sourceUri.ToString());
  PackageManager packageManager = new PackageManager(sourceRepository, packagesPath);

  foreach (var sourcePackage in sourceRepository.GetPackages().Where(x => x.IsLatestVersion))
  {
    if (!packageReferenceFile.EntryExists(sourcePackage.Id + " " + sourcePackage.Version, sourcePackage.Version))
    {
      var oldPackage = packageReferenceFile.GetPackageReferences().FirstOrDefault(x => x.Id.Contains(sourcePackage.Id));

      if (oldPackage != null)
      {
        packageReferenceFile.DeleteEntry(oldPackage.Id, oldPackage.Version);
      }

      packageManager.InstallPackage(sourcePackage.Id, SemanticVersion.Parse(sourcePackage.Version.ToFullString()));

      // Get the target framework of the current project to add --> targetframework="net452" attribute in the package.config file
      var currentTargetFw = Assembly.GetExecutingAssembly()
        .GetCustomAttributes(typeof(TargetFrameworkAttribute), false);
      var targetFrameworkAttribute = ((TargetFrameworkAttribute[]) currentTargetFw).FirstOrDefault();

      // Update the packages.config file    
      packageReferenceFile.AddEntry(sourcePackage.GetFullName(),
        SemanticVersion.Parse(sourcePackage.Version.ToFullString()), false,
        new FrameworkName(targetFrameworkAttribute.FrameworkName));
    }
  }

这可以作为控制台应用程序正常工作，并自动正确读取文件并更新必要的引用。

当我尝试将其作为MsBuild任务运行时，我一直遇到错误。

编译期间发生错误。 c：\ Users \ user \ AppData \ Local \ Temp \ dkkg20ya.0.cs（22,11）：错误CS0246：找不到类型或命名空间名称'NuGet'（您是否缺少using指令或程序集引用？）
无法从程序集“C：\ Program Files（x86）\ Microsoft Visual Studio \ 2017 \ Enterprise \ MSBuild \ 15.0 \ Bin \ Microsoft.Build.Tasks.v15.0”加载任务工厂“CodeTaskFactory”。 DLL”。任务工厂必须返回“TaskType”属性的值。

这是我在csproj中放入的代码（也移动到nuget.targets进行测试）

<Target Name="BeforeBeforeBuild" BeforeTargets="BeforeBuild">
    <UpdateNugetFiles />
  </Target>
<UsingTask TaskName="UpdateNugetFiles" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v$(MSBuildToolsVersion).dll" > 
    <Task>
        <Reference Include="System.Core" />
        <Using Namespace="System" />
        <Using Namespace="System.Linq" />
        <Using Namespace="System.Reflection" />
        <Using Namespace="System.Runtime.Versioning" />
        <Using Namespace="NuGet" />
        <Code Type="Fragment" Language="cs">
            <![CDATA[
            try {
                // ---- Download and install a package at a desired path ----
  var sourceUri = new Uri("FEED URL");

  // ---- Update the ‘packages.config’ file ----
  var packageReferenceFile = new PackageReferenceFile("../../packages.config");
  string packagesPath = "../../packages";
  IPackageRepository sourceRepository = PackageRepositoryFactory.Default.CreateRepository(sourceUri.ToString());
  PackageManager packageManager = new PackageManager(sourceRepository, packagesPath);

  foreach (var sourcePackage in sourceRepository.GetPackages().Where(x => x.IsLatestVersion))
  {
    if (!packageReferenceFile.EntryExists(sourcePackage.Id + " " + sourcePackage.Version, sourcePackage.Version))
    {
      var oldPackage = packageReferenceFile.GetPackageReferences().FirstOrDefault(x => x.Id.Contains(sourcePackage.Id));

      if (oldPackage != null)
      {
        packageReferenceFile.DeleteEntry(oldPackage.Id, oldPackage.Version);
      }

      packageManager.InstallPackage(sourcePackage.Id, SemanticVersion.Parse(sourcePackage.Version.ToFullString()));

      // Get the target framework of the current project to add targetframework="net452" attribute in the package.config file
      currentTargetFw = Assembly.GetExecutingAssembly()
        .GetCustomAttributes(typeof(TargetFrameworkAttribute), false);
      var targetFrameworkAttribute = ((TargetFrameworkAttribute[]) currentTargetFw).FirstOrDefault();

      // Update the packages.config file    
      packageReferenceFile.AddEntry(sourcePackage.GetFullName(),
        SemanticVersion.Parse(sourcePackage.Version.ToFullString()), false,
        new FrameworkName(targetFrameworkAttribute.FrameworkName));
    }
  }

                return true;
            }
            catch (Exception ex) {
                Log.LogErrorFromException(ex);
                return false;
            }
        ]]>
        </Code>
    </Task>
</UsingTask>

有关如何解决此问题的任何想法似乎无法找到解决方案。总体来说，在CI构建上运行此前一步是为了使nugets保持最新。

由于添

Answer 1

致电

nuget restore "your_solution.sln"

不要通过用C＃代码编写它来重新发明轮子。

Answer 2

Nuget在MSBuild BeforeBuild Step中更新Packages.config

不确定代码问题的来源。使用NuGet.exe来恢复和更新解决方案而不是尝试使用C＃代码可能更简单。

因此，您可以在MSBuild BeforeBuild步骤

中添加以下nuget命令行

  <Target Name="BeforeBeforeBuild" BeforeTargets="BeforeBuild">
    <Exec Command="$(YourNuGetPath)\nuget.exe restore &quot;$(YouSolutionPath)\YourSolution.sln&quot; -PackagesDirectory &quot;$(YouPackagePath)\packages&quot;" />
    <Exec Command="$(YourNuGetPath)\nuget.exe update &quot;$(YouSolutionPath)\YourSolution.sln&quot;" />
  </Target>

注意：如果您使用的是Visual Studio，Visual Studio将在构建期间自动检查缺失的包并将其还原：Package Restore。

希望这会有所帮助。

Nuget在MSBuild BeforeBuild Step中更新Packages.config

2 个答案: