dotnet publish遇Microsoft.Web.LibraryManager.Build.RestoreTask异常求助

问题详情 #

• 执行dotnet publish时，Microsoft.Web.LibraryManager.Build组件引发报错，该问题曾是已知问题并在2.1.76版本中修复。
• 当前使用LibraryManager最新版本2.1.175（VS2017环境，.NET Core 2.1.509），但仍出现相同错误，现寻求同类问题案例及临时解决办法。

报错日志 #

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018: The "Microsoft.Web.LibraryManager.Build.RestoreTask" task failed unexpectedly. [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018: System.TypeInitializationException: The type initializer for 'Microsoft.Web.LibraryManager.Cache.WebRequestHandler' threw an exception. ---> System.TypeInitializationException: The type initializer for 'Microsoft.Web.LibraryManager.Configuration.Settings' threw an exception. ---> System.IO.FileLoadException: Could not load file or assembly 'Newtonsoft.Json, Version=13.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed'. Could not find or load a specific file. (Exception from HRESULT: 0x80131621) [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018:    at Microsoft.Web.LibraryManager.Configuration.Settings..ctor() [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018:    at Microsoft.Web.LibraryManager.Configuration.Settings..cctor() [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018:    --- End of inner exception stack trace --- [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018:    at Microsoft.Web.LibraryManager.Configuration.ProxySettings.get_Default() [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018:    at Microsoft.Web.LibraryManager.Cache.WebRequestHandler..cctor() [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018:    --- End of inner exception stack trace --- [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018:    at Microsoft.Web.LibraryManager.Build.Contracts.Dependencies.Initialize() [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018:    at Microsoft.Web.LibraryManager.Build.RestoreTask.Execute() [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

C:\Users\teamcitybuild\.nuget\packages\microsoft.web.librarymanager.build\2.1.175\build\Microsoft.Web.LibraryManager.Build.targets(35,9): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask) [C:\TeamCity\buildAgent\work\bbac78e917f81a30\Source\...]

临时解决办法 #

• 绑定Newtonsoft.Json版本：在项目的.csproj文件中添加程序集绑定重定向，指定与项目实际引用匹配的Newtonsoft.Json版本：

<runtime>
  <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
    <dependentAssembly>
      <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
      <bindingRedirect oldVersion="0.0.0.0-13.0.0.0" newVersion="你的项目实际引用版本号" />
    </dependentAssembly>
  </assemblyBinding>
</runtime>

• 禁用构建时还原：如果不需要构建阶段自动还原库，可在.csproj中关闭该任务：

<PropertyGroup>
  <LibraryManagerRestore>false</LibraryManagerRestore>
</PropertyGroup>

• 清理NuGet缓存：执行命令清理缓存后重新还原依赖：

dotnet nuget locals all --clear
dotnet restore

• 降级LibraryManager版本：暂时切换到已知修复该问题的2.1.76版本，修改.csproj中的版本引用：

<PackageReference Include="Microsoft.Web.LibraryManager.Build" Version="2.1.76" />

内容的提问来源于stack exchange，提问作者GeorgeMaharis