flycheck-haskell does not work with haskell-mode installed from source

[flycheck]

flycheck-haskell does not work with haskell-mode installed from source

[gracjan]

Interesting. How can we advertise from source that haskell-mode is available and working?

[geraldus]

em, fboundp 'haskell-mode?

[gracjan]

Seems like manual calling of package-load-descriptor with single argument that is the directory where haskell-mode is gitcloned should do the trick.

[swsnr]

You can't. If you install a package through the package manager you must install all its dependencies through the package manager as well. There's no reliable way around this.

In other words, you must install Haskell Mode like you install flycheck-haskell.

Closing since this is not an issue in this library, but a configuration error.

[gracjan]

@lunaryorn: yes, you should close this issue.

Still we need to find a way as it is impossible to hack on haskell-mode otherwise and we really need to do this.

[geraldus]

@lunaryorn feel free to close! (: so, in my case I need to install flycheck-haskell (and flycheck itself?) from source to resolve this?

[swsnr]

Well, you can install this library from GitHub as well. I don't support that but as Emacs developers you should be able to cope with any issues that might occur 😀

[swsnr]

Or you install Haskell Mode from MELPA as well, and then just reload it when you want to makes changes to it. That's what Emacs has eval-buffer and friends for, and that's what I do with Flycheck.

[geraldus]

😄 well, I'm using eval-buffer constantly. The issue is haskell-mode tests, it picks up precompiled haskell-mode sources when doing tests, so usually tests fail. But I have easier solution: just remove all *.elc files from haskell-mode. Anyway, thank you for clarifications, I'll stick with MELPA installation.

[swsnr]

@geraldus I'm not sure what you mean, but then I don't know how the test suite of Haskell Mode works either. But there should be a script or Makefile target or anything of that sort to run all Haskell Mode tests from a Git checkout, using the Git version. If there isn't, that's probably something that you can contribute to Haskell Mode :)

[geraldus]

@lunaryorn for example I've removed third arg from some-funciton and updated all code where it used. Now if I'll run tests (make check in this case) it will fail with error message alike "function some-function takes exactly 3 args, but was given only 2". The workaround is to remove *.elc files from haskell-mode folder (from where make command ran). Excuse me for nonce noise (:

[swsnr]

@geraldus I'd argue that this is an issue in the makefile of Haskell Mode. make check should depend on the compilation target if it uses byte code files.

[gracjan]

Noted an issue in our github issue tracker.