I’m trying to set up some custom mix tasks for working with elm but when I call: Mix.shell.cmd("elm init") I get the prompt from elm asking whether to proceed in creating elm.json, but after I type ‘y’ and hit enter the process hangs. When I break out, the message thread blocked indefinitely in …

The BEAM in general doesn’t like it. stdin of your application isn’t magically wired to stdin of the executed shell program. You need to find a way to either enforce overwriting all, or to cancel in case of a conflict. Or to write a Port on your own, that intercepts output and splices input in a …

[image] kokolegorille: I don’t know Elm, but would this work? Mix.shell.cmd("elm init -y") Unfortunately Elm doesn’t accept flags on the init cmd, so that’s not an option.

[image] NobbZ: You need to find a way to either enforce overwriting all, or to cancel in case of a conflict. Not too sure what you mean here. Would you be able to elaborate/explain further? Thanks

A well designed generator has flags to either assume hard confirmation of overwrites on conflict or to abort the process on conflicts. You already said elm init does not support this. In my opinion this is worth a feature request on the elm side of things…

[image] NobbZ: A well designed generator has flags to either assume hard confirmation of overwrites on conflict or to abort the process on conflicts. You already said elm init does not support this. Wasn’t sure if you meant the flag option or something above my ‘pay grade’ :slight_smile: Than…

[image] phollyer: The Port option might be outside my current elixir/IO skills, but I’ll dip my toes into the water over the weekend and see what transpires. It’s not that hard, I recommend it. The erlexec library (yes it’s erlang but works perfect in elixir) wraps up that work with a much b…

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Elm init hangs in mix task

Questions & Help Questions

kokolegorille September 6, 2019, 8:57am 2

I don’t know Elm, but would this work?

Mix.shell.cmd("elm init -y")