Replace Travis with Github Actions and Nix ❄️

[kutyel]

Huge thanks to @domenkozar for the help! 😉 🙌

Fixes #22

[juanpedromoreno]

👌

[pepegar]

Just a question, apart of that, LGTM! 🙌

[serras]

It seems, looking at the logs, that Nix uses a different root directory when compiling:

2019-12-17T16:00:50.5995315Z src/Mu/Adapter/ProtoBuf/Example.hs:1:1: error:
2019-12-17T16:00:50.5999118Z     Exception when trying to run compile-time code:
2019-12-17T16:00:50.6001605Z       test/protobuf/example.proto: openFile: does not exist (No such file or directory)
2019-12-17T16:00:50.6003989Z     Code: protobuf
2019-12-17T16:00:50.6016555Z             "ExampleProtoBufSchema" "test/protobuf/example.proto"
2019-12-17T16:00:50.6016676Z   |
2019-12-17T16:00:50.6017105Z 1 | {-# language DataKinds       #-}

[domenkozar]

The downside of haskell.nix is that you have to compile GHC and everything up the to libraries first. It's a one time build you have to pay in order to get the benefit of not updating Nix when project goes on.

There's a way to use haskell.nix cachix to speed that up, but you'd need to pin the correct nixpkgs in that case (which may be ok with you?).

[kutyel]

It seems, looking at the logs, that Nix uses a different root directory when compiling:

2019-12-17T16:00:50.5995315Z src/Mu/Adapter/ProtoBuf/Example.hs:1:1: error:
2019-12-17T16:00:50.5999118Z     Exception when trying to run compile-time code:
2019-12-17T16:00:50.6001605Z       test/protobuf/example.proto: openFile: does not exist (No such file or directory)
2019-12-17T16:00:50.6003989Z     Code: protobuf
2019-12-17T16:00:50.6016555Z             "ExampleProtoBufSchema" "test/protobuf/example.proto"
2019-12-17T16:00:50.6016676Z   |
2019-12-17T16:00:50.6017105Z 1 | {-# language DataKinds       #-}

I just added some changes that should fix this, thanks again @domenkozar 🎉

For reference, apparently cabal does not like external files, so you need to add them to your data-files entry on your cabal, I followed this post by Neil Mitchell 👏

[kutyel]

@juanpedromoreno it seems like the 47deg.cachix.org account is not correctly configured:

responseBody = "{\"error\":\"No public key set yet. Run 'cachix generate-keypair' first.\"}"})

Can you please take a look? 😉

[kutyel]

Ok, it is fixed now 🎉 It should work! 🤞