[BUG] Can't build : System.NullReferenceException on Xamarin.Android

[Lapinou42]

Describe the bug

/Users/Christophe/.nuget/packages/pharmacist.msbuild/1.5.15/buildTransitive/netstandard2.0/Pharmacist.MSBuild.targets(48,5): error : PharmacistNuGetTask: System.NullReferenceException: Object reference not set to an instance of an object /Users/Christophe/.nuget/packages/pharmacist.msbuild/1.5.15/buildTransitive/netstandard2.0/Pharmacist.MSBuild.targets(48,5): error : at NuGet.Protocol.DownloadResourceV3.GetDownloadUrl (NuGet.Packaging.Core.PackageIdentity identity, NuGet.Common.ILogger log, System.Threading.CancellationToken token) [0x0007a] in <83330316d0b44741910fff5cb41b7909>:0 /Users/Christophe/.nuget/packages/pharmacist.msbuild/1.5.15/buildTransitive/netstandard2.0/Pharmacist.MSBuild.targets(48,5): error : at NuGet.Protocol.DownloadResourceV3.GetDownloadResourceResultAsync (NuGet.Packaging.Core.PackageIdentity identity, NuGet.Protocol.Core.Types.PackageDownloadContext downloadContext, System.String globalPackagesFolder, NuGet.Common.ILogger logger, System.Threading.CancellationToken token) [0x000bd] in <83330316d0b44741910fff5cb41b7909>:0 /Users/Christophe/.nuget/packages/pharmacist.msbuild/1.5.15/buildTransitive/netstandard2.0/Pharmacist.MSBuild.targets(48,5): error : at Pharmacist.Core.NuGet.NuGetPackageHelper+<>c__DisplayClass17_0.b__4 (System.ValueTuple`2[T1,T2] item) [0x00094] in <9df0e4b5ad784380b78db0d845007e4b>:0

Screenshots

Environment OS: Mac OS 10.15.3 (19D76) Android SDK version: 10 VS version: 8.4.8 (build 2) ReactiveUI versions: 11.2.3 (ReactiveUI, ReactiveUI.AndroidX, ReactiveUI.AndroidSupport) Pharmacist version: 1.5.15

Additional context

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[Lapinou42]

Seems similar to https://github.com/reactiveui/Pharmacist/issues/77, I have also private nugets.

[Lapinou42]

I found a workaround :

• I removed Pharmacist.MSBuild and hold just Pharmacist.Common
• I removed theses lines from my .csproj:

<ItemGroup>
    <PackageReference Include="Pharmacist.MsBuild" Version="1.*" PrivateAssets="all" />
    <PackageReference Include="Pharmacist.Common" Version="1.*" />
</ItemGroup>

• I generated the file using this command and add it to my project:

pharmacist generate-platform -p android -o c:/directory/for/output --output-prefix="Events_"

[glennawatson]

Can you attach the project file you were trying to generate for? Something is generating empty package references.

[chrisgate]

@glennawatson i think by creating new Xamarin.Forms project gives this error.....but by removing Pharmacist.MSBuild made it build

[glennawatson]

You would normally add Pharmacist to your netstandard project btw for Xamarin Forms.

[chrisgate]

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

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <ProduceReferenceAssembly>true</ProduceReferenceAssembly>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
    <DebugType>portable</DebugType>
    <DebugSymbols>true</DebugSymbols>
    <PharmacistGlobalPackages>true</PharmacistGlobalPackages>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Prism.DryIoc.Forms" Version="8.0.0.1539-ci" />
    <PackageReference Include="ReactiveUI" Version="11.2.3" />
    <PackageReference Include="ReactiveUI.Fody" Version="11.2.3" />
    <PackageReference Include="Tsl.AsciiProtocol.Std" Version="1.4.3" />
    <PackageReference Include="Xamarin.Forms" Version="4.5.0.356" />
    <PackageReference Include="Xamarin.Essentials" Version="1.5.1" />
    <PackageReference Include="Xamarin.Forms.PancakeView" Version="1.3.7" />
    <PackageReference Include="Pharmacist.Common" Version="1.5.15" />
  </ItemGroup>

  <ItemGroup>
    <EmbeddedResource Update="Views\DashboardPage.xaml">
      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
    </EmbeddedResource>
    <EmbeddedResource Update="Views\LoginPage.xaml">
      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
    </EmbeddedResource>
    <EmbeddedResource Update="Views\ManageEventsPage.xaml">
      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
    </EmbeddedResource>
    <EmbeddedResource Update="Views\SetDrawer.xaml">
      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
    </EmbeddedResource>
  </ItemGroup>
</Project>

[chrisgate]

thats my csproj. i added it to forms

[glennawatson]

See https://www.nuget.org/packages/ReactiveMarbles.ObservableEvents.SourceGenerator/ and https://github.com/reactivemarbles/ObservableEventsSourceGenerator

This won't use it's own nuget integration anymore, instead will use dotnet one.

ReactiveMarbles.ObservableEvents.SourceGenerator 1.0.2

Allows to get an observables for property changed events.

GitHub

reactivemarbles/ObservableEventsSourceGenerator

Contribute to reactivemarbles/ObservableEventsSourceGenerator development by creating an account on GitHub.

[github-actions[bot]]

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