Haskell-language-server: Error loading project with optional `packages` field missing in stack.yaml

[armatures]

I have a Hakyll project open (repo here), and I've installed this plugin. Syntax highlighting looks good, but I get this error in my "problems" tab:

My main is in the root of the project directory, and in my cabal file, I have the line main-is: site.hs, would this be a problem?
Thank you!

[fendor]

I can reproduce, but I don't really know what is going on.

How do you develop your package? For me, stack build just fails which could be the reason for this error.

When I use cabal, by either writing a hie.yaml file with:

cradle:
  cabal:

or gen-hie > hie.yaml (although I have no idea why it does what I want), everything works as expected for me.

[bubba]

Your stack.yaml should have a packages field, I believe that's what the parse error is coming from:

resolver: lts-whatever
packages:
  - .
extra-deps:
...

[armatures]

@fendor I did a fresh clone of my project, and stack build worked, though maybe there's something about my environment causing it to succeed where it shouldn't. I have been confused by stack before, by breaking projects I'm not working on, so there must be some sort of global state I don't understand.
@bubba This fixes it! I updated the stack.yaml as you suggested and things look great. 🤦‍♂️ sorry for the trouble, and thank you!

[armatures]

For posterity, I did find this in Stack's documentation:

The packages field is optional. If omitted, it is treated as:
packages:
- .

So this might still be regarded as a bug. I did close it because there's an easy workaround, but a PR wouldn't be the worst idea. Does anyone have any pointers as to where I would find this field if I was interested in making such a change?

[anka-213]

I think this issue should be reopened. That field is indeed optional and many projects don't have it in their stack.yaml files.

[jneira]

Ok, reopened and renamed

[anka-213]

I'll add the error message here, so the issue can still be found by searching for it, even though it is not in the title anymore

user error ("AesonException "Error in $:key\packages\" not found") compiler [1,1]

[fendor]

@armatures
Currently, it is unclear, who causes this issue. Afaict, it should be https://github.com/mpickering/hie-bios/, since it is the only tool that is aware of the build-tools.
First steps would be to see, if you can reproduce the issue with only hie-bios. E.g. hie-bios check src/Lib.gs or hie-bios check src/Lib.hs

Then which stack command invocation is broken.
Code for the stack action is here:
https://github.com/mpickering/hie-bios/blob/master/src/HIE/Bios/Cradle.hs#L614

Commands that we require to work:

stack exec ghc -- --numeric-version
stack repl --no-nix-pure -w <some custom ghc> <optional component name>
stack path --ghc-package-path

Maybe one of these commands fails if packages is missing?

[armatures]

I thought this might be a good issue for me but got hung up on a hie-bios dependency over here. I may be yak-shaving for a while before I can look further into this.