Question

我在Jenkins构建服务器上运行Cake构建并且正在

error CS0101: The name 'Npm' does not exist in the current context

任务看起来像这样

Task("NpmInstall")
    .Does(() =>
    {
        Npm.FromPath("./src/MyProject/").Install();
    });

Cake build在我安装了Visual Studio 2017的开发机器上完美运行，所以我知道脚本很好，但由于某种原因，它会在Jenkins构建服务器上抛出此错误。我猜我在我的开发机器上安装了一些工具，这些工具在Jenkins机器上并不存在，但我似乎无法找到它。

以下是上一次构建的诊断输出

Preparing to run build script...
Chocolatey v0.10.5
Nothing to change. Config already set.
Chocolatey v0.10.5
Installing the following packages:
gitversion.portable
By installing you accept licenses for the packages.
GitVersion.Portable v4.0.0-beta0011 already installed.
 Use --force to reinstall, specify a version to install, or try upgrade.

Chocolatey installed 0/1 packages. 0 packages failed.
 See the log for details (C:\ProgramData\chocolatey\logs\chocolatey.log).

Warnings:
 - gitversion.portable - GitVersion.Portable v4.0.0-beta0011 already installed.
 Use --force to reinstall, specify a version to install, or try upgrade.
Running build script...
Module directory does not exist.
Analyzing build script...
Analyzing C:/Program Files (x86)/Jenkins/workspace/release-1.0.0/build.cake...
Processing build script...
Installing addins...
Package Cake.Npm has already been installed.
The addin Cake.Npm will reference Cake.Npm.dll.
Creating script session...
Adding reference to mscorlib.dll...
Adding reference to System.Core.dll...
Adding reference to Cake.Core.dll...
Adding reference to Cake.Common.dll...
Adding reference to Cake.exe...
Adding reference to System.dll...
Adding reference to System.Xml.dll...
Adding reference to System.Xml.Linq.dll...
Adding reference to System.Data.dll...
Adding reference to Cake.Npm.dll...
Importing namespace Cake.Common...
Importing namespace Cake.Common.Build...
Importing namespace Cake.Common.Build.AppVeyor...
Importing namespace Cake.Common.Build.AppVeyor.Data...
Importing namespace Cake.Common.Build.Bamboo...
Importing namespace Cake.Common.Build.Bamboo.Data...
Importing namespace Cake.Common.Build.BitbucketPipelines...
Importing namespace Cake.Common.Build.BitbucketPipelines.Data...
Importing namespace Cake.Common.Build.Bitrise...
Importing namespace Cake.Common.Build.Bitrise.Data...
Importing namespace Cake.Common.Build.ContinuaCI...
Importing namespace Cake.Common.Build.ContinuaCI.Data...
Importing namespace Cake.Common.Build.GitLabCI...
Importing namespace Cake.Common.Build.GitLabCI.Data...
Importing namespace Cake.Common.Build.GoCD...
Importing namespace Cake.Common.Build.GoCD.Data...
Importing namespace Cake.Common.Build.Jenkins...
Importing namespace Cake.Common.Build.Jenkins.Data...
Importing namespace Cake.Common.Build.MyGet...
Importing namespace Cake.Common.Build.TeamCity...
Importing namespace Cake.Common.Build.TFBuild...
Importing namespace Cake.Common.Build.TFBuild.Data...
Importing namespace Cake.Common.Build.TravisCI...
Importing namespace Cake.Common.Build.TravisCI.Data...
Importing namespace Cake.Common.Diagnostics...
Importing namespace Cake.Common.IO...
Importing namespace Cake.Common.IO.Paths...
Importing namespace Cake.Common.Net...
Importing namespace Cake.Common.Security...
Importing namespace Cake.Common.Solution...
Importing namespace Cake.Common.Solution.Project...
Importing namespace Cake.Common.Solution.Project.Properties...
Importing namespace Cake.Common.Solution.Project.XmlDoc...
Importing namespace Cake.Common.Text...
Importing namespace Cake.Common.Tools...
Importing namespace Cake.Common.Tools.Cake...
Importing namespace Cake.Common.Tools.Chocolatey...
Importing namespace Cake.Common.Tools.Chocolatey.ApiKey...
Importing namespace Cake.Common.Tools.Chocolatey.Config...
Importing namespace Cake.Common.Tools.Chocolatey.Features...
Importing namespace Cake.Common.Tools.Chocolatey.Install...
Importing namespace Cake.Common.Tools.Chocolatey.New...
Importing namespace Cake.Common.Tools.Chocolatey.Pack...
Importing namespace Cake.Common.Tools.Chocolatey.Pin...
Importing namespace Cake.Common.Tools.Chocolatey.Push...
Importing namespace Cake.Common.Tools.Chocolatey.Sources...
Importing namespace Cake.Common.Tools.Chocolatey.Uninstall...
Importing namespace Cake.Common.Tools.Chocolatey.Upgrade...
Importing namespace Cake.Common.Tools.DotCover...
Importing namespace Cake.Common.Tools.DotCover.Analyse...
Importing namespace Cake.Common.Tools.DotCover.Cover...
Importing namespace Cake.Common.Tools.DotCover.Merge...
Importing namespace Cake.Common.Tools.DotCover.Report...
Importing namespace Cake.Common.Tools.DotNetCore...
Importing namespace Cake.Common.Tools.DotNetCore.Build...
Importing namespace Cake.Common.Tools.DotNetCore.Execute...
Importing namespace Cake.Common.Tools.DotNetCore.Pack...
Importing namespace Cake.Common.Tools.DotNetCore.Publish...
Importing namespace Cake.Common.Tools.DotNetCore.Restore...
Importing namespace Cake.Common.Tools.DotNetCore.Run...
Importing namespace Cake.Common.Tools.DotNetCore.Test...
Importing namespace Cake.Common.Tools.DupFinder...
Importing namespace Cake.Common.Tools.Fixie...
Importing namespace Cake.Common.Tools.GitLink...
Importing namespace Cake.Common.Tools.GitReleaseManager...
Importing namespace Cake.Common.Tools.GitReleaseManager.AddAssets...
Importing namespace Cake.Common.Tools.GitReleaseManager.Close...
Importing namespace Cake.Common.Tools.GitReleaseManager.Create...
Importing namespace Cake.Common.Tools.GitReleaseManager.Export...
Importing namespace Cake.Common.Tools.GitReleaseManager.Publish...
Importing namespace Cake.Common.Tools.GitReleaseNotes...
Importing namespace Cake.Common.Tools.GitVersion...
Importing namespace Cake.Common.Tools.ILMerge...
Importing namespace Cake.Common.Tools.ILRepack...
Importing namespace Cake.Common.Tools.InnoSetup...
Importing namespace Cake.Common.Tools.InspectCode...
Importing namespace Cake.Common.Tools.MSBuild...
Importing namespace Cake.Common.Tools.MSTest...
Importing namespace Cake.Common.Tools.NSIS...
Importing namespace Cake.Common.Tools.NuGet...
Importing namespace Cake.Common.Tools.NuGet.Add...
Importing namespace Cake.Common.Tools.NuGet.Init...
Importing namespace Cake.Common.Tools.NuGet.Install...
Importing namespace Cake.Common.Tools.NuGet.Pack...
Importing namespace Cake.Common.Tools.NuGet.Push...
Importing namespace Cake.Common.Tools.NuGet.Restore...
Importing namespace Cake.Common.Tools.NuGet.SetApiKey...
Importing namespace Cake.Common.Tools.NuGet.SetProxy...
Importing namespace Cake.Common.Tools.NuGet.Sources...
Importing namespace Cake.Common.Tools.NuGet.Update...
Importing namespace Cake.Common.Tools.NUnit...
Importing namespace Cake.Common.Tools.OctopusDeploy...
Importing namespace Cake.Common.Tools.OpenCover...
Importing namespace Cake.Common.Tools.ReportGenerator...
Importing namespace Cake.Common.Tools.ReportUnit...
Importing namespace Cake.Common.Tools.Roundhouse...
Importing namespace Cake.Common.Tools.SignTool...
Importing namespace Cake.Common.Tools.SpecFlow...
Importing namespace Cake.Common.Tools.SpecFlow.StepDefinitionReport...
Importing namespace Cake.Common.Tools.SpecFlow.TestExecutionReport...
Importing namespace Cake.Common.Tools.TextTransform...
Importing namespace Cake.Common.Tools.VSTest...
Importing namespace Cake.Common.Tools.VSWhere...
Importing namespace Cake.Common.Tools.VSWhere.All...
Importing namespace Cake.Common.Tools.VSWhere.Latest...
Importing namespace Cake.Common.Tools.VSWhere.Legacy...
Importing namespace Cake.Common.Tools.VSWhere.Product...
Importing namespace Cake.Common.Tools.WiX...
Importing namespace Cake.Common.Tools.WiX.Heat...
Importing namespace Cake.Common.Tools.XBuild...
Importing namespace Cake.Common.Tools.XUnit...
Importing namespace Cake.Common.Xml...
Importing namespace Cake.Core...
Importing namespace Cake.Core.Diagnostics...
Importing namespace Cake.Core.IO...
Importing namespace Cake.Core.Scripting...
Importing namespace Cake.Npm...
Importing namespace Cake.Npm.Install...
Importing namespace Cake.Npm.Pack...
Importing namespace Cake.Npm.Publish...
Importing namespace Cake.Npm.RunScript...
Importing namespace System...
Importing namespace System.Collections.Generic...
Importing namespace System.IO...
Importing namespace System.Linq...
Importing namespace System.Text...
Importing namespace System.Threading.Tasks...
Compiling build script...
Error: Roslyn.Compilers.CompilationErrorException: C:/Program Files (x86)/Jenkins/workspace/release-1.0.0/build.cake(37,3): error CS0103: The name 'Npm' does not exist in the current context
   at Roslyn.Scripting.CommonScriptEngine.CompilationError(DiagnosticBag localDiagnostics, DiagnosticBag diagnostics)
   at Roslyn.Scripting.CommonScriptEngine.Compile(String code, String path, DiagnosticBag diagnostics, Session session, Type delegateType, Type returnType, CancellationToken cancellationToken, Boolean isInteractive, Boolean isExecute,     CommonCompilation& compilation, Delegate& factory)
   at Roslyn.Scripting.CommonScriptEngine.Execute[T](String code, String path, DiagnosticBag diagnostics, Session session, Boolean isInteractive)
   at Roslyn.Scripting.Session.Execute(String code)
   at Cake.Core.Scripting.ScriptRunner.Run(IScriptHost host, FilePath scriptPath, IDictionary`2 arguments)
   at Cake.Commands.BuildCommand.Execute(CakeOptions options)
   at Cake.CakeApplication.Run(CakeOptions options)
   at Cake.Program.Main()

构建服务器上缺少什么？

Answer 1

虽然我同意Cake.Npm软件包中的重大变化是不幸的，也许可以更好地处理，但API的变化完全documented，并提出了如何推进必要的建议变化，以及如何坚持以前的版本。纯粹从语义版本的角度来看，这个插件还没有达到第一个公共API版本号，即1.0.0，因此应该预期API级别更改，并进行适当处理。

这里的后一点是重要的一点，也是我想进一步强调的一点。在任何构建系统中，不仅仅是Cake，您需要努力实现可重复，可维护的构建。您可以阅读有关此here的内容。为此，强烈建议您同时固定specific version of Cake并固定到您在构建脚本中使用的所有插件，工具和模块的特定版本。这样，您将始终能够在任何系统上重复构建，而不是由于在应用程序上游发布新依赖项而导致构建失败。

我建议您使用以下内容：

#addin nuget:?package=Cake.Npm&version=0.8.0

这样，继续前进，您选择运行构建的本地计算机和任何构建服务器都将获取Cake.Npm软件包的0.8.0版本，并且将始终有效。

然后，当你准备好了，你可以故意升级依赖，测试以确保一切正常，然后推出更改。

Answer 2

这是Cake.Npm插件发生重大变化的结果。使用0.9.0，维护者基本上重写了API以使用NpmInstall，NpmPack等别名来替换旧的Npm.Install样式别名。

您应该可以通过将任务更改为以下内容来修复此错误：

Task("NpmInstall")
.Does(() =>
{
    NpmInstall(s => s.FromPath("./src/MyProject/"));
});

您可以查看新API的完整文档on the website

名字＆＃39; Npm＆＃39;在Cake构建期间当前上下文中不存在

2 个答案: