Paket: Run Paket without mono

[whitebear-gh]

Description

Hi guys,

I'm trying to add Paket as my packages manager, the problem is that I'm using docker and aspnetcore-build image to build the project. Issue is when I call dotnet restore from within docker image. Apparently Paket is trying to use mono but aspnetcore-image only includes dotnet core SDK. Is there any way to handle this?

Repro steps

1. Create Dockerfile, similar to:

FROM microsoft/aspnetcore-build AS builder
WORKDIR /source

COPY .paket/ .paket/
COPY paket.dependencies paket.dependencies
COPY src/restapi/restapi.csproj ./src/restapi/
RUN dotnet restore ./src/restapi/restapi.csproj

1. Build docker image, like:

docker build -t myapp .

Expected behavior

image is created

Actual behavior

/usr/bin/sh: 2: /tmp/tmp9db3547cca0e4368ad3c85e5f64e7fbb.exec.cmd: mono: not found
/source/.paket/Paket.Restore.targets(24,5): error MSB3073: The command "mono --runtime=v4.0.30319 "/source/.paket/paket.exe" restore --project "/source/src/restapi/restapi.csproj" --target-framework netcoreapp2.0" exited with code 127. [/source/src/restapi/restapi.csproj]
The command '/bin/sh -c dotnet restore ./src/restapi/restapi.csproj' returned a non-zero code: 1

[whitebear-gh]

ohhh I see now where is the problem. Is it possible to run paket on Linux using dotnet core instead of mono? I assume that not currently because it's not compiled targeting core. :(

[forki]

We plan to do this in the future. But we need help here. We're not even
sure how bootstrapping and stuff like that will work.

Am 25.08.2017 10:00 schrieb "whitebear-gh" [e-mail]:

ohhh I see now where is the problem. Is it possible to run paket on Linux
using dotnet core instead of mono? I assume that not currently because it's
not compiled targeting core. :(

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[Craige]

Just chiming in that this is the thing keeping me from using Paket. Would definitely like to be able to run Paket on OSX without mono.

[matthid]

How would ypu expect it to work? Ie what jt the workflow to get bootstrapped (in netcore we don't have standalone exes anymore)

[Craige]

I'm not sure I understand the problem. You can still publish a standalone app in dotnetcore (unless I'm misinformed)

[forki]

How?

Am 08.09.2017 08:41 schrieb "Craige Leeder" [e-mail]:

I'm not sure I understand the problem. You can still publish a standalone
app in dotnetcore (unless I'm misinformed)

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[0x53A]

you can do a "standalone" publish, but this will result in a big folder, not a single-file executable.

And it is obviously platform dependent, you need different versions for windows / linux / osx.

dotnet publish -c release -r osx.10.10-x64 for example.

---

To get started, you would probably need a native script (.ps1 / .sh), which downloads and unzips the required version.

[Craige]

@forki, @0x53a - See this thread (nearer the end for dotnetcore2): https://github.com/dotnet/core/issues/77, and this documentation: https://docs.microsoft.com/en-us/dotnet/core/deploying/deploy-with-cli

[enricosada]

Closing.

Work for .net core paket (and support in .net core sdk) is tracked by https://github.com/fsprojects/Paket/issues/2875

As a note, for dockerfile, you can use fsharp/fsharp image who contains both .net core and .net mono.
With that, you can use docker multi staged builds, so you use an image with .netcore+mono to build, and more published result in another (with just .net core)

[drinkbird]

@enricosada thanks for the note. Unfortunately I can only find two separate images for netcore and mono (https://github.com/fsprojects/docker-fsharp/tree/master/4.1.29) but not one that has both. Am I missing something?