Packing in Nuget

Recently, I came across an error, ‘DomainEvents.AttributesPackage 1.0.55’. You are trying to install this package into a project that targets ‘Unsupported,Version=v0.0’, but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author. It was because I didn’t support multiple .NET versions.

Let’s update project file to support multiple .NET framework versions.

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFrameworks>netstandard2.1;net45;net46</TargetFrameworks>
    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
    <PackageId>SanPellgrino</PackageId>
    <Version>0.4.0</Version>
    <Authors>Andrew Chaa</Authors>
    <AssemblyName>SanPellgrino</AssemblyName>
    <RootNamespace>SanPellgrino</RootNamespace>
    <Description>A collection of useful extension methods</Description>
    <PackageProjectUrl>https://github.com/andrewchaa/sanpellgrino</PackageProjectUrl>
    <PackageIconUrl>https://raw.githubusercontent.com/andrewchaa/SanPellgrino/master/src/Extensions/icon.jpeg</PackageIconUrl>
    <PackageIcon>icon.jpeg</PackageIcon>
    <PackageLicenseExpression>MIT</PackageLicenseExpression>
    <PackageTags>Extension Methods, Helper Methods</PackageTags>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="xunit.assert, Version=2.4.0.4049, Culture=neutral, PublicKeyToken=8d05b1bb7a6fdb6c">
      <HintPath>..\..\..\.nuget\packages\xunit.assert\2.4.0\lib\netstandard2.0\xunit.assert.dll</HintPath>
    </Reference>
    <Reference Include="xunit.core, Version=2.4.0.4049, Culture=neutral, PublicKeyToken=8d05b1bb7a6fdb6c">
      <HintPath>..\..\..\.nuget\packages\xunit.extensibility.core\2.4.0\lib\netstandard2.0\xunit.core.dll</HintPath>
    </Reference>
    <None Include=".\icon.jpeg" Pack="true" PackagePath="\" />
  </ItemGroup>
</Project>

Now, dotnet pack will create .nupkg targetting both .NET Standard 2.1 and .NET Framework 4.5 and 4.6. Make sure you reload the project.

PackageIconUrl is deprecated. So use PackageIcon and include the image in the project.

<PropertyGroup>
  ...
  <PackageIcon>fountain-pen.png</PackageIcon>
  ...
</PropertyGroup>

<ItemGroup>
  <None Include="fountain-pen.png" Pack="true" PackagePath="\" />
</ItemGroup>

Build script

# pack nuget package
- task: DotNetCoreCLI@2
  displayName: Pack
  condition: and(succeeded(), eq(variables['Build.SourceBranch'], 'refs/heads/master'))
  inputs:
    command: 'pack'
    configuration: 'release'
    packagesToPack: $(packageProject)
    packDirectory: '$(build.artifactStagingDirectory)/nupkgs'
    versioningScheme: 'byBuildNumber'        

# Publish to the innovation release feed
- task: DotNetCoreCLI@2 
  displayName: Publish to Nuget Feed
  condition: and(succeeded(), eq(variables['Build.SourceBranch'], 'refs/heads/master'))
  inputs:
    command: push
    packagesToPush: '$(build.artifactStagingDirectory)/nupkgs/*.nupkg'
    publishVstsFeed: ''