Windows Support

[levirs565]

Neuron is great project. However, it does not support Windows. I have been trying to port Neuron to Windows. Unfortunately Neuron is using NixPkgs. I am trying to add Stack support for Neuron. My initial stack.yaml is this:

resolver: lts-17.6

extra-deps:
- github: srid/directory-contents
  commit: 0d3f1d5c86063232a3ccf081d9be143eb2ff1466
- github: srid/pandoc-link-context
  commit: ff8d1de662d4b2d3be0553d93f51a67a1696ced7
- github: reflex-frp/reflex-fsnotify
  commit: cca674623b797dd423421dec0f1da952a1d1f36d
- github: srid/reflex-dom-pandoc
  commit: 63ff62ee9c7f4a8c231db16bb91b858c8a39aebd
# - aeson-gadt-th-0.2.5.0
# - th-abstraction-0.3.2.0
# - dependent-map-0.4.0.0
# - dependent-sum-0.7.1.0
# - constraints-extras-0.3.0.2
# - dependent-sum-template-0.1.0.3
- reflex-0.8.0.0
# - reflex-dom-core-0.6.1.0
# - template-haskell
# - dependent-sum-template-0.1.0.3
# - constraints-extras-0.3.0.2

However, Its fail and show this error:

Error: While constructing the build plan, the following exceptions were encountered:

In the dependencies for directory-contents-0.2.0.0:
    witherable must match >=0.3 && <0.5, but the stack configuration has no specified version  (latest matching version is 0.4.1)
needed due to neuron-1.9.25.0 -> directory-contents-0.2.0.0

In the dependencies for neuron-1.9.25.0:
    aeson-gadt-th must match >=0.2.5.0, but the stack configuration has no specified version  (latest matching version is 0.2.5.0)
    constraints-extras needed, but the stack configuration has no specified version  (latest matching version is 0.3.0.2)
    dependent-map needed, but the stack configuration has no specified version  (latest matching version is 0.4.0.0)
    dependent-sum needed, but the stack configuration has no specified version  (latest matching version is 0.7.1.0)
    dependent-sum-aeson-orphans must match >=0.2.1.0, but the stack configuration has no specified version  (latest matching version is 0.3.0.0)
    dependent-sum-template needed, but the stack configuration has no specified version  (latest matching version is 0.1.0.3)
    lsp needed, but the stack configuration has no specified version  (latest matching version is 1.1.1.0)
    reflex-dom-core needed, but the stack configuration has no specified version  (latest matching version is 0.6.1.0)
    shower needed, but the stack configuration has no specified version  (latest matching version is 0.2.0.2)
    which needed, but the stack configuration has no specified version  (latest matching version is 0.2)
needed since neuron is a build target.

In the dependencies for reflex-0.8.0.0:
    base-4.14.1.0 from stack configuration does not match >=4.9 && <4.14  (latest matching version is 4.13.0.0)
    constraints-extras must match >=0.3 && <0.4, but the stack configuration has no specified version  (latest matching version is 0.3.0.2)
    dependent-map must match >=0.3 && <0.5, but the stack configuration has no specified version  (latest matching version is 0.4.0.0)
    dependent-sum must match >=0.6 && <0.8, but the stack configuration has no specified version  (latest matching version is 0.7.1.0)
    monoidal-containers must match >=0.6 && <0.7, but the stack configuration has no specified version  (latest matching version is 0.6.0.1)
    patch must match >=0.0.1 && <0.1, but the stack configuration has no specified version  (latest matching version is 0.0.3.2)
    prim-uniq must match >=0.1.0.1 && <0.3, but the stack configuration has no specified version  (latest matching version is 0.2)
    template-haskell-2.16.0.0 from stack configuration does not match >=2.9 && <2.16  (latest matching version is 2.15.0.0)
    witherable must match >=0.3 && <0.4, but the stack configuration has no specified version  (latest matching version is 0.3.5)
needed due to neuron-1.9.25.0 -> reflex-0.8.0.0

In the dependencies for reflex-dom-pandoc-0.7.9.0:
    reflex-dom-core needed, but the stack configuration has no specified version  (latest matching version is 0.6.1.0)
needed due to neuron-1.9.25.0 -> reflex-dom-pandoc-0.7.9.0

In the dependencies for reflex-fsnotify-0.2.1.2:
    base-4.14.1.0 from stack configuration does not match >=4.10 && <4.14  (latest matching version is 4.13.0.0)
needed due to neuron-1.9.25.0 -> reflex-fsnotify-0.2.1.2

Some different approaches to resolving this:

  * Build requires unattainable version of base. Since base is a part of GHC, you most likely need to use a different GHC version with the matching base.

Plan construction failed.

I see that reflex is not suppor GHC 8.10 because GHC 8.10 is use base-4.14. When I read CHANGELOG its say that Neuron have been migrated to GHC 8.10. Solution for this problem maybe using GHC 8.9. Is there any solution than this?

[srid]

I see that reflex is not suppor GHC 8.10

That is false at least on Linux, because the current master branch of neuron already builds using GHC 8.10, and you can verify this using nix-shell:

❯ nix-shell --run 'ghc --version'
The Glorious Glasgow Haskell Compilation System, version 8.10.4

However, looking at the error messages you pasted above, I fail to see how this is an issue with compiler version? Maybe stack is doing something funky here. Have you tried building with plain cabal?

By the way, eventually #432 needs to be done as part of this.

[levirs565]

You can see this portion of error message:

In the dependencies for reflex-0.8.0.0:
    base-4.14.1.0 from stack configuration does not match >=4.9 && <4.14  (latest matching version is 4.13.0.0)
    constraints-extras must match >=0.3 && <0.4, but the stack configuration has no specified version  (latest matching version is 0.3.0.2)
    dependent-map must match >=0.3 && <0.5, but the stack configuration has no specified version  (latest matching version is 0.4.0.0)
    dependent-sum must match >=0.6 && <0.8, but the stack configuration has no specified version  (latest matching version is 0.7.1.0)
    monoidal-containers must match >=0.6 && <0.7, but the stack configuration has no specified version  (latest matching version is 0.6.0.1)
    patch must match >=0.0.1 && <0.1, but the stack configuration has no specified version  (latest matching version is 0.0.3.2)
    prim-uniq must match >=0.1.0.1 && <0.3, but the stack configuration has no specified version  (latest matching version is 0.2)
    template-haskell-2.16.0.0 from stack configuration does not match >=2.9 && <2.16  (latest matching version is 2.15.0.0)
    witherable must match >=0.3 && <0.4, but the stack configuration has no specified version  (latest matching version is 0.3.5)
needed due to neuron-1.9.25.0 -> reflex-0.8.0.0

Reflex 0.8 require base >=4.9 && <4.14. However, GHC 8.10 is shipped with base 4.14.1.

[srid]

Obsidian's packages (including reflex) often don't have to up-to-date constraints, so it is common to override these. I'm pretty sure nixpkgs does it already; perhaps you can tell stack to ignore it?

[levirs565]

Thanks. Stack have allow-newer option that allow ignore dependencies upper consraint.