cabal: Missing dependency: reflex-dom-pandoc >= 0.7.9.0

[mrzv]

Neuron works great on Linux, but it's incredibly complicated to build Nix on macOS, so the recommended way of building neuron is inaccessible there. I'd like to avoid the docker route, so #528 doesn't help.

When I try to build neuron with cabal build, it gives an error that it cannot find reflex-dom-pandoc >= 0.7.9.0, and indeed the latest release I see is 0.6.0. Where can I find the version that neuron needs?

[srid]

@mrzv Last I checked installing Nix on macOS was straightforward; has that changed?

See https://github.com/srid/neuron/tree/master/dep for all the source-based Haskell dependencies used by neuron.

Per https://github.com/srid/neuron/blob/master/dep/reflex-dom-pandoc/github.json - you need 63ff62ee9c7f4a8c231db16bb91b858c8a39aebd of https://github.com/srid/reflex-dom-pandoc

[mrzv]

Progress, but another error:

...
[42 of 70] Compiling Neuron.CLI.Search ( src/Neuron/CLI/Search.hs, .../neuron/dist-newstyle/build/x86_64-osx/ghc-8.10.6/neuron-1.9.35.1/build/Neuron/CLI/Search.o, .../neuron/dist-newstyle/build/x86_64-osx/ghc-8.10.6/neuron-1.9.35.1/build/Neuron/CLI/Search.dyn_o )

src/Neuron/CLI/Search.hs:20:24: error:
    • staticWhich: Could not find executable for "neuron-search"
    • In the untyped splice: $(staticWhich "neuron-search")
   |
20 | neuronSearchScript = $(staticWhich "neuron-search")
   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
cabal: Failed to build neuron-1.9.35.1 (which is required by exe:neuron from
neuron-1.9.35.1).

[srid]

This patch is supposed to address that https://github.com/srid/neuron/pull/429/files (it got reverted later on due to a regression)

But for the moment the easiest option is to try building by specifying that script in PATH, as in:

PATH=/path/to/neuron/source/tree cabal build

[mrzv]

Progress, but one more error:

Building executable 'neuron' for neuron-1.9.35.1..
[1 of 1] Compiling Main             ( exe/Main.hs, .../neuron/dist-newstyle/build/x86_64-osx/ghc-8.10.6/neuron-1.9.35.1/x/neuron/build/neuron/neuron-tmp/Main.o )

exe/Main.hs:16:3: error:
    Ambiguous occurrence ‘hSetBuffering’
    It could refer to
       either ‘Relude.hSetBuffering’,
              imported from ‘Relude’ at exe/Main.hs:11:1-13
              (and originally defined in ‘Relude.Lifted.Handle’)
           or ‘System.IO.hSetBuffering’,
              imported from ‘System.IO’ at exe/Main.hs:12:19-31
              (and originally defined in ‘GHC.IO.Handle’)
   |
16 |   hSetBuffering stdout LineBuffering
   |   ^^^^^^^^^^^^^

exe/Main.hs:17:3: error:
    Ambiguous occurrence ‘hSetBuffering’
    It could refer to
       either ‘Relude.hSetBuffering’,
              imported from ‘Relude’ at exe/Main.hs:11:1-13
              (and originally defined in ‘Relude.Lifted.Handle’)
           or ‘System.IO.hSetBuffering’,
              imported from ‘System.IO’ at exe/Main.hs:12:19-31
              (and originally defined in ‘GHC.IO.Handle’)
   |
17 |   hSetBuffering stderr LineBuffering

[srid]

Can you try 62ebb5e ?

[mrzv]

Victory! It compiles and runs. Many thanks.

[mrzv]

The first sentence of the section you link to says that it's not straightforward, specifically that you need a "workaround". The workaround involves creating a new volume, which is less than ideal for many reasons.

Thanks for the pointers. I don't use Haskell and cabal, but hopefully I can figure out how to convince it to use the right commit.

[srid]

Right, but I assumed that the command thereafter is supposed to automate all of that. There is another one at https://nix.dev/tutorials/install-nix#macos - and it doesn't mention needing to do any manual workaround prior.

[mrzv]

It's a little terrifying to trust a random bit of code downloaded from the Internet to repartition my hard-drive.