VSTS：##[错误]未找到提供的环境变量的值
VSTS: ##[error]No value was found for the provided environment variable
我花了很多时间试图弄清楚这一点，但就是做不到。 FWIW，这个项目从本地命令行和 TeamCity 打包得很好。它也是基于 VSTS 构建的，但此错误使任务失败。 Nuget pack 任务在 visualstudio.com build 中寻找什么环境变量？
这里是相关文件和任务配置：
package.nuspec:
<?xml version="1.0"?>
<package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
<metadata>
<id>VDS.AppCore.Formatters</id>
<version>$version$</version>
<title>VDS AppCore Formatters</title>
<authors>Visual Data Solutions, Inc.</authors>
<owners>Visual Data Solutions, Inc.</owners>
<requireLicenseAcceptance>false</requireLicenseAcceptance>
<description>VDS AppCore Formatters</description>
<copyright>Copyright © Visual Data Solutions, Inc. 2010-2017</copyright>
</metadata>
<files>
<file src="$SolutionDir$VDS.AppCore.Formatters\bin$Configuration$\VDS.AppCore.Formatters.dll" target="lib\net45" />
<file src="$SolutionDir$VDS.AppCore.Formatters\bin$Configuration$\VDS.AppCore.Formatters.pdb" target="lib\net45" />
<file src="$SolutionDir$VDS.AppCore.Formatters\**\*.cs" target="src" />
</files>
</package>
.csproj
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)$(MSBuildToolsVersion)\Microsoft.Common.props')" />
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProjectGuid>{BED8C9D5-954F-47AA-9BDA-531D125209C0}</ProjectGuid>
<OutputType>Library</OutputType>
<AppDesignerFolder>Properties</AppDesignerFolder>
<RootNamespace>VDS.AppCore.Formatters</RootNamespace>
<AssemblyName>VDS.AppCore.Formatters</AssemblyName>
<TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
<FileAlignment>512</FileAlignment>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\Debug\</OutputPath>
<DefineConstants>DEBUG;TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<DebugType>pdbonly</DebugType>
<Optimize>true</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DefineConstants>TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<ItemGroup>
<Reference Include="System" />
<Reference Include="System.Core" />
<Reference Include="System.Xml.Linq" />
<Reference Include="System.Data.DataSetExtensions" />
<Reference Include="Microsoft.CSharp" />
<Reference Include="System.Data" />
<Reference Include="System.Net.Http" />
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="CsvFormatter.cs" />
<Compile Include="DataFormatters.cs" />
<Compile Include="DefaultFormatters.cs" />
<Compile Include="Formatters.cs" />
<Compile Include="IDataFormatter.cs" />
<Compile Include="IDataFormatters.cs" />
<Compile Include="IFlatFormatter.cs" />
<Compile Include="IFormatters.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
<Compile Include="XlsFormatter.cs" />
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>
如有任何意见，我们将不胜感激。这让我抓狂，并且阻止我将我们的构建过程从本地 TeamCity 转移到云上的 vsts，这是我们当前的要求。我真的不想创建 TeamCity VM。 :)
根据评论请求构建日志：
2017-08-16T03:14:26.4967581Z ##[section]Starting: NuGet pack Formatters nuspec
2017-08-16T03:14:26.4967581Z ==============================================================================
2017-08-16T03:14:26.4967581Z Task : NuGet
2017-08-16T03:14:26.4967581Z Description : Restore, pack, or push NuGet packages, or run a NuGet command. Supports NuGet.org and authenticated feeds like Package Management and MyGet.
2017-08-16T03:14:26.4967581Z Version : 2.0.6
2017-08-16T03:14:26.4967581Z Author : Microsoft Corporation
2017-08-16T03:14:26.4967581Z Help : [More Information](https://go.microsoft.com/fwlink/?LinkID=613747)
2017-08-16T03:14:26.4977585Z ==============================================================================
2017-08-16T03:14:26.9697601Z [command]C:\Windows\system32\chcp.com 65001
2017-08-16T03:14:26.9787594Z Active code page: 65001
2017-08-16T03:14:26.9917604Z Attempting to pack file: d:\a\s\TeamCity\Build\VDS.AppCore.Formatters\Package.nuspec
2017-08-16T03:14:26.9967613Z [command]d:\a\_tool\NuGet.0.0\x64\nuget.exe pack d:\a\s\TeamCity\Build\VDS.AppCore.Formatters\Package.nuspec -NonInteractive -OutputDirectory d:\a\a -Properties Configuration=Debug;SolutionDir=d:\a\s\;ArtifactDir=d:\a\a;version=2.0.1.71;Platform=AnyCPU -version 2.0.1.71 -Verbosity Detailed
2017-08-16T03:14:27.4699931Z NuGet Version: 4.0.0.2283
2017-08-16T03:14:27.4777604Z Attempting to build package from 'Package.nuspec'.
2017-08-16T03:14:27.6887611Z
2017-08-16T03:14:27.6907601Z Id: VDS.AppCore.Formatters
2017-08-16T03:14:27.6907601Z Version: 2.0.1.71
2017-08-16T03:14:27.6907601Z Authors: Visual Data Solutions, Inc.
2017-08-16T03:14:27.6907601Z Description: VDS AppCore Formatters
2017-08-16T03:14:27.6907601Z Dependencies: None
2017-08-16T03:14:27.6907601Z
2017-08-16T03:14:27.6937601Z Added file '[Content_Types].xml'.
2017-08-16T03:14:27.6937601Z Added file '_rels/.rels'.
2017-08-16T03:14:27.6937601Z Added file 'lib/net45/VDS.AppCore.Formatters.dll'.
2017-08-16T03:14:27.6937601Z Added file 'lib/net45/VDS.AppCore.Formatters.pdb'.
2017-08-16T03:14:27.6937601Z Added file 'package/services/metadata/core-properties/d049e0823aea40cdba6267568d619a5d.psmdcp'.
2017-08-16T03:14:27.6937601Z Added file 'src/CsvFormatter.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/DataFormatters.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/DefaultFormatters.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/Formatters.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/IDataFormatter.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/IDataFormatters.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/IFlatFormatter.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/IFormatters.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/Properties/AssemblyInfo.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/XlsFormatter.cs'.
2017-08-16T03:14:27.6937601Z Added file 'VDS.AppCore.Formatters.nuspec'.
2017-08-16T03:14:27.6937601Z
2017-08-16T03:14:27.6937601Z Successfully created package 'd:\a\a\VDS.AppCore.Formatters.2.0.1.71.nupkg'.
2017-08-16T03:14:27.7427599Z ##[section]Finishing: NuGet pack Formatters nuspec
它是由 NuGet 包任务中的 环境变量 选项引起的。
此处应使用变量而不用$。所以你应该直接使用PackageVersion。
我花了很多时间试图弄清楚这一点，但就是做不到。 FWIW，这个项目从本地命令行和 TeamCity 打包得很好。它也是基于 VSTS 构建的，但此错误使任务失败。 Nuget pack 任务在 visualstudio.com build 中寻找什么环境变量？
这里是相关文件和任务配置：
package.nuspec:
<?xml version="1.0"?>
<package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
<metadata>
<id>VDS.AppCore.Formatters</id>
<version>$version$</version>
<title>VDS AppCore Formatters</title>
<authors>Visual Data Solutions, Inc.</authors>
<owners>Visual Data Solutions, Inc.</owners>
<requireLicenseAcceptance>false</requireLicenseAcceptance>
<description>VDS AppCore Formatters</description>
<copyright>Copyright © Visual Data Solutions, Inc. 2010-2017</copyright>
</metadata>
<files>
<file src="$SolutionDir$VDS.AppCore.Formatters\bin$Configuration$\VDS.AppCore.Formatters.dll" target="lib\net45" />
<file src="$SolutionDir$VDS.AppCore.Formatters\bin$Configuration$\VDS.AppCore.Formatters.pdb" target="lib\net45" />
<file src="$SolutionDir$VDS.AppCore.Formatters\**\*.cs" target="src" />
</files>
</package>
.csproj
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)$(MSBuildToolsVersion)\Microsoft.Common.props')" />
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProjectGuid>{BED8C9D5-954F-47AA-9BDA-531D125209C0}</ProjectGuid>
<OutputType>Library</OutputType>
<AppDesignerFolder>Properties</AppDesignerFolder>
<RootNamespace>VDS.AppCore.Formatters</RootNamespace>
<AssemblyName>VDS.AppCore.Formatters</AssemblyName>
<TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
<FileAlignment>512</FileAlignment>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\Debug\</OutputPath>
<DefineConstants>DEBUG;TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<DebugType>pdbonly</DebugType>
<Optimize>true</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DefineConstants>TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<ItemGroup>
<Reference Include="System" />
<Reference Include="System.Core" />
<Reference Include="System.Xml.Linq" />
<Reference Include="System.Data.DataSetExtensions" />
<Reference Include="Microsoft.CSharp" />
<Reference Include="System.Data" />
<Reference Include="System.Net.Http" />
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="CsvFormatter.cs" />
<Compile Include="DataFormatters.cs" />
<Compile Include="DefaultFormatters.cs" />
<Compile Include="Formatters.cs" />
<Compile Include="IDataFormatter.cs" />
<Compile Include="IDataFormatters.cs" />
<Compile Include="IFlatFormatter.cs" />
<Compile Include="IFormatters.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
<Compile Include="XlsFormatter.cs" />
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>
如有任何意见，我们将不胜感激。这让我抓狂，并且阻止我将我们的构建过程从本地 TeamCity 转移到云上的 vsts，这是我们当前的要求。我真的不想创建 TeamCity VM。 :)
根据评论请求构建日志：
2017-08-16T03:14:26.4967581Z ##[section]Starting: NuGet pack Formatters nuspec
2017-08-16T03:14:26.4967581Z ==============================================================================
2017-08-16T03:14:26.4967581Z Task : NuGet
2017-08-16T03:14:26.4967581Z Description : Restore, pack, or push NuGet packages, or run a NuGet command. Supports NuGet.org and authenticated feeds like Package Management and MyGet.
2017-08-16T03:14:26.4967581Z Version : 2.0.6
2017-08-16T03:14:26.4967581Z Author : Microsoft Corporation
2017-08-16T03:14:26.4967581Z Help : [More Information](https://go.microsoft.com/fwlink/?LinkID=613747)
2017-08-16T03:14:26.4977585Z ==============================================================================
2017-08-16T03:14:26.9697601Z [command]C:\Windows\system32\chcp.com 65001
2017-08-16T03:14:26.9787594Z Active code page: 65001
2017-08-16T03:14:26.9917604Z Attempting to pack file: d:\a\s\TeamCity\Build\VDS.AppCore.Formatters\Package.nuspec
2017-08-16T03:14:26.9967613Z [command]d:\a\_tool\NuGet.0.0\x64\nuget.exe pack d:\a\s\TeamCity\Build\VDS.AppCore.Formatters\Package.nuspec -NonInteractive -OutputDirectory d:\a\a -Properties Configuration=Debug;SolutionDir=d:\a\s\;ArtifactDir=d:\a\a;version=2.0.1.71;Platform=AnyCPU -version 2.0.1.71 -Verbosity Detailed
2017-08-16T03:14:27.4699931Z NuGet Version: 4.0.0.2283
2017-08-16T03:14:27.4777604Z Attempting to build package from 'Package.nuspec'.
2017-08-16T03:14:27.6887611Z
2017-08-16T03:14:27.6907601Z Id: VDS.AppCore.Formatters
2017-08-16T03:14:27.6907601Z Version: 2.0.1.71
2017-08-16T03:14:27.6907601Z Authors: Visual Data Solutions, Inc.
2017-08-16T03:14:27.6907601Z Description: VDS AppCore Formatters
2017-08-16T03:14:27.6907601Z Dependencies: None
2017-08-16T03:14:27.6907601Z
2017-08-16T03:14:27.6937601Z Added file '[Content_Types].xml'.
2017-08-16T03:14:27.6937601Z Added file '_rels/.rels'.
2017-08-16T03:14:27.6937601Z Added file 'lib/net45/VDS.AppCore.Formatters.dll'.
2017-08-16T03:14:27.6937601Z Added file 'lib/net45/VDS.AppCore.Formatters.pdb'.
2017-08-16T03:14:27.6937601Z Added file 'package/services/metadata/core-properties/d049e0823aea40cdba6267568d619a5d.psmdcp'.
2017-08-16T03:14:27.6937601Z Added file 'src/CsvFormatter.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/DataFormatters.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/DefaultFormatters.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/Formatters.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/IDataFormatter.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/IDataFormatters.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/IFlatFormatter.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/IFormatters.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/Properties/AssemblyInfo.cs'.
2017-08-16T03:14:27.6937601Z Added file 'src/XlsFormatter.cs'.
2017-08-16T03:14:27.6937601Z Added file 'VDS.AppCore.Formatters.nuspec'.
2017-08-16T03:14:27.6937601Z
2017-08-16T03:14:27.6937601Z Successfully created package 'd:\a\a\VDS.AppCore.Formatters.2.0.1.71.nupkg'.
2017-08-16T03:14:27.7427599Z ##[section]Finishing: NuGet pack Formatters nuspec
它是由 NuGet 包任务中的 环境变量 选项引起的。
此处应使用变量而不用$。所以你应该直接使用PackageVersion。