Runtime: Arch Linux: It was not possible to find any compatible framework version. The specified framework 'Microsoft.AspNetCore.App', version '2.1.0' was not found.

[koxu1996]

Steps to reproduce

1. Install latest SDK (v2.1.300) and Runtime (v2.1.0)
2. Create webapp with: 'dotnet new web'
3. Run it with: 'dotnet run'

Expected behavior

Running app

Actual behavior

$ dotnet new web
The template "ASP.NET Core Empty" was created successfully.

Processing post-creation actions...
Running 'dotnet restore' on /tmp/jebacmicrosoft/jebacmicrosoft.csproj...
  Restoring packages for /tmp/jebacmicrosoft/jebacmicrosoft.csproj...
  Generating MSBuild file /tmp/jebacmicrosoft/obj/jebacmicrosoft.csproj.nuget.g.props.
  Generating MSBuild file /tmp/jebacmicrosoft/obj/jebacmicrosoft.csproj.nuget.g.targets.
  Restore completed in 393.31 ms for /tmp/jebacmicrosoft/jebacmicrosoft.csproj.

Restore succeeded.

$ dotnet run 
Using launch settings from /tmp/jebacmicrosoft/Properties/launchSettings.json...
It was not possible to find any compatible framework version
The specified framework 'Microsoft.AspNetCore.App', version '2.1.0' was not found.
  - Check application dependencies and target a framework version installed at:
      /opt/dotnet/
  - Installing .NET Core prerequisites might help resolve this problem:
      http://go.microsoft.com/fwlink/?LinkID=798306&clcid=0x409
  - The .NET Core framework and SDK can be installed from:
      https://aka.ms/dotnet-download

Environment data

_$ dotnet --info_

.NET Core SDK (reflecting any global.json):
 Version:   2.1.300
 Commit:    adab45bf0c

Runtime Environment:
 OS Name:     arch
 OS Version:
 OS Platform: Linux
 RID:         linux-x64
 Base Path:   /opt/dotnet/sdk/2.1.300/

Host (useful for support):
  Version: 2.1.0
  Commit:  caa7b7e2ba

.NET Core SDKs installed:
  2.1.300 [/opt/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.NETCore.App 2.1.0 [/opt/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

[koxu1996]

It seems Arch Linux is not supported. It is not surprising, because all microsoft's products are shitty.

[jeffschwMSFT]

Can you send us a trace file for why it was not found? export COREHOST_TRACE=1 then run dotnet run. Thanks

[koxu1996]

log.txt

[jeffschwMSFT]

@steveharter can you take a look? The logs shows that the initial dotnet run command found the appropriate netcoreapp 2.1.0 location:
--- Resolving FX directory, name 'Microsoft.NETCore.App' version '2.1.0'
Searching FX directory in [/opt/dotnet]
Attempting FX roll forward starting from [2.1.0]
'Roll forward on no candidate fx' enabled with value [1]. Looking for the least production greater than or equal to [2.1.0]
Found version [2.1.0]
But by the time the dotnet exec command executed it could not:
--- Resolving FX directory, name 'Microsoft.AspNetCore.App' version '2.1.0'
Searching FX directory in [/opt/dotnet]
Attempting FX roll forward starting from [2.1.0]
'Roll forward on no candidate fx' enabled with value [1]. Looking for the least production greater than or equal to [2.1.0]
No production greater than or equal to [2.1.0] found. Looking for the least preview greater than [2.1.0]
No preview greater than or equal to [2.1.0] found.
Applying patch roll forward from [2.1.0]
It was not possible to find any compatible framework version
The specified framework 'Microsoft.AspNetCore.App', version '2.1.0' was not found.

[steveharter]

The first two iterations of calling dotnet were successful:

Launch host: /opt/dotnet/dotnet, app: /opt/dotnet/sdk/2.1.300/dotnet.dll, argc: 1, args: run,
Launch host: /opt/dotnet/dotnet, app: /opt/dotnet/sdk/2.1.300/MSBuild.dll, argc: 6, args: -maxcpucount,-verbosity:m,-restore,/tmp/jebacmicrosoft/jebacmicrosoft.csproj,-nologo,-verbosity:quiet,

then it couldn't find 'Microsoft.AspNetCore.App' in the /opt/dotnet location and failed.

@natemcmaster @rowanmiller I assume this is a duplicate of issue regarding additional steps for installing the dotnet-hosting-2.1.0 bundle?

[natemcmaster]

This looks like a separate issue.

@koxu1996 how did you install the runtime and SDK? Using a tarball, apt, yum, etc...

Also, this is interesting to me

Runtime Environment:
 OS Name:     arch
 OS Version:
 OS Platform: Linux
 RID:         linux-x64

Which distro of Linux are you using?

[koxu1996]

@natemcmaster I am using _Arch Linux_, so I installed it with single command:

pacman -S dotnet-sdk

Packages like _dotnet-runtime_ and _dotnet-host_ are installed as dependencies.

I have also checked packages' source (example) and they are using latest versions.

[natemcmaster]

I see. It looks like the package maintainers need to update the dependencies of the dotnet-sdk package. In 2.1, we refactored the way aspnetcore is installed. On Debian and Redhat distros, the package graph looks like this:

dotnet-sdk-2.1 (v2.1.300)
 => dotnet-runtime-2.1 (v2.1.0)
 => aspnetcore-runtime-2.1 (v2.1.0)

It appears the Arch linux packaging is missing the dependency on the ASP.NET Core runtime.

@koxu1996 you can workaround this for now by manually fetching and installing the ASP.NET Core bits. aspnetcore-runtime-2.1.0-linux-x64.tar.gz. Extract this into /opt/dotnet/. This will add files into /opt/dotnet/shared/Microsoft.AspNetCore.App.

cc @livarcocc @leecow - do we have contacts with the maintainers of the Arch Linux packaging?

[koxu1996]

@natemcmaster Indeed it works after installing _aspnetcore-runtime-2.1_. I will contact package maintainer. Thanks for help.

[leecow]

I haven't had contact with the Arch Linux maintainers.

[natemcmaster]

Ok, I'll start an email thread with the maintainers listed here: https://git.archlinux.org/svntogit/community.git/tree/trunk/PKGBUILD?h=packages/dotnet-sdk

[CaCTuCaTu4ECKuu]

@natemcmaster I feel like I can inform you that this behavior is still a thing in 2020. Particularly in manjaro distro. I was troubleshooting this for a whole day when finally find out that aspnetcore-runtime must be installed separately (which called aspnet-runtime btw in arch)
I just have no words it was terrible experience, 10 years passed and linux still have awful UX on any distro.

[nhh]

@CaCTuCaTu4ECKuu experienced the same today, thank you for leading me to "aspnet-runtime"... linux word needs some guidance in these things...