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On running 'pack' I am getting the following error...

2017-07-05T10:37:09.7762333Z ##[section]Starting: NuGet pack

2017-07-05T10:37:09.7762333Z ==============================================================================

2017-07-05T10:37:09.7762333Z Task         : NuGet

2017-07-05T10:37:09.7762333Z Description  : Restore, pack, or push NuGet packages, or run a NuGet command. Supports NuGet.org and authenticated feeds like Package Management and MyGet.

2017-07-05T10:37:09.7762333Z Version      : 2.0.3

2017-07-05T10:37:09.7762333Z Author       : Microsoft Corporation

2017-07-05T10:37:09.7762333Z Help         : [More Information](https://go.microsoft.com/fwlink/?LinkID=613747)

2017-07-05T10:37:09.7762333Z ==============================================================================

2017-07-05T10:37:10.9664575Z Downloading: https://dist.nuget.org/win-x86-commandline/v4.0.0/nuget.exe

2017-07-05T10:37:11.0954621Z Caching tool: NuGet 4.0.0 x64

2017-07-05T10:37:11.1084622Z Using version: 4.0.0

2017-07-05T10:37:11.1094622Z Found tool in cache: NuGet 4.0.0 x64

2017-07-05T10:37:11.1214629Z [command]C:\Windows\system32\chcp.com 65001

2017-07-05T10:37:11.1634626Z Active code page: 65001

2017-07-05T10:37:11.2234637Z Attempting to pack file: d:\a\1\s\src\Esoterix\Esoterix.csproj

2017-07-05T10:37:11.2294640Z [command]d:\a\_tool\NuGet\4.0.0\x64\nuget.exe pack d:\a\1\s\src\Esoterix\Esoterix.csproj -NonInteractive -OutputDirectory d:\a\1\a -Properties Configuration=release -version 1.0.0-CI-201765-103711 -Verbosity Detailed

2017-07-05T10:37:12.3087180Z NuGet Version: 4.0.0.2283

2017-07-05T10:37:12.3187144Z Attempting to build package from 'Esoterix.csproj'.

2017-07-05T10:37:12.7569409Z MSBuild auto-detection: using msbuild version '15.1.1012.6693' from 'C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\15.0\bin'. Use option -MSBuildVersion to force nuget to use a specific version of MSBuild.

2017-07-05T10:37:15.3118046Z Packing files from 'd:\a\1\s\src\Esoterix\bin\release\netcoreapp1.1'.

2017-07-05T10:37:15.7119285Z Add file 'd:\a\1\s\src\Esoterix\bin\release\netcoreapp1.1\Esoterix.dll' to package as 'lib\netcoreapp1.1\Esoterix.dll'

2017-07-05T10:37:15.7959331Z System.InvalidCastException: Unable to cast object of type 'System.String' to type 'NuGet.Frameworks.NuGetFramework'.

2017-07-05T10:37:15.7969309Z    at NuGet.ProjectManagement.NuGetProject.GetMetadata[T](String key)

2017-07-05T10:37:15.7969309Z    at NuGet.ProjectManagement.PackagesConfigNuGetProject..ctor(String folderPath, Dictionary`2 metadata)

2017-07-05T10:37:15.7969309Z    at CallSite.Target(Closure , CallSite , Type , Object , Dictionary`2 )

2017-07-05T10:37:15.7969309Z    at System.Dynamic.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)

2017-07-05T10:37:15.7969309Z    at NuGet.CommandLine.ProjectFactory.AddDependencies(Dictionary`2 packagesAndDependencies)

2017-07-05T10:37:15.7969309Z    at NuGet.CommandLine.ProjectFactory.ProcessDependencies(PackageBuilder builder)

2017-07-05T10:37:15.7969309Z    at NuGet.CommandLine.ProjectFactory.CreateBuilder(String basePath, NuGetVersion version, String suffix, Boolean buildIfNeeded, PackageBuilder builder)

2017-07-05T10:37:15.7969309Z    at NuGet.Commands.PackCommandRunner.BuildFromProjectFile(String path)

2017-07-05T10:37:15.7969309Z    at NuGet.CommandLine.PackCommand.ExecuteCommand()

2017-07-05T10:37:15.7969309Z    at NuGet.CommandLine.Command.ExecuteCommandAsync()

2017-07-05T10:37:15.7969309Z    at NuGet.CommandLine.Command.Execute()

2017-07-05T10:37:15.7969309Z    at NuGet.CommandLine.Program.MainCore(String workingDirectory, String[] args)

2017-07-05T10:37:15.8259323Z ##[error]Error: d:\a\_tool\NuGet\4.0.0\x64\nuget.exe failed with return code: 1

2017-07-05T10:37:15.8259323Z ##[error]An error ocurred while trying to pack the files.

2017-07-05T10:37:15.8289336Z ##[section]Finishing: NuGet pack

It seems that everything is picked up fine up to this point so I'm a bit stuck . Any ideas welcome.

1 Answer

0 votes
by (16.8k points)

Try to use "dotnet pack" instead of "nuget pack" in your VSTS, it will be resolved.

To publish nuget lib on VSTS, choose the following plugins sequence:

  1. Get sources
  2. nuget restore
  3. dotnet build
  4. dotnet pack
  5. nuget push
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