Deoplete.nvim: deoplete requires msgpack 1.0.0+.

[iio7]

Problems summary

After updating Deoplete, Neovim keeps complaining "[deoplete] deoplete requires msgpack 1.0.0+." and it isn't working.

I am not using pip but my package manager:

The following is for Python 3.

python-msgpack 0.6.2-3 [installed]
python-pynvim 0.4.1-1 [installed]

I have seen other bug reports, but haven't been able to solve the issue as I am not using pip.

Expected

I am using the identical config file on Vim and deoplete works on Vim.

Environment Information

• deoplete version (SHA1): ebc9c155b0247314609e8d326e030adb3391f243

• OS: Arch Linux

• neovim/Vim :version output: v0.4.3

• :checkhealth or :CheckHealth result(neovim only):

  - OK: exists("v:t_list") was successful
  - OK: has("timers") was successful
  - OK: has("python3") was successful
  - OK: Require Python 3.6.1+ was successful
  - ERROR: Require msgpack 1.0.0+ was not successful
    - ADVICE:
      - Please install/upgrade msgpack 1.0.0+.

Provide a minimal init.vim/vimrc with less than 50 lines (Required!)

Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }
Plug 'roxma/nvim-yarp'
Plug 'roxma/vim-hug-neovim-rpc'
let g:deoplete#enable_at_startup = 1

How to reproduce the problem from neovim/Vim startup (Required!)

1. PlugInstall
2. Run nvim

Screenshot (if possible)

Neovim

Vim

[Shougo]

This is not deoplete problem.
Arch Linux does not release msgpack 1.0 yet. I don't know why.
You can install manually it by pip command.
So I will close.

[Shougo]

If you don't want to pip ultimately, you need to downgrade deoplete.

Please read the documentation.

Note: If you really need to use older msgpack, please use deoplete ver.5.2 instead.
https://github.com/Shougo/deoplete.nvim/releases/tag/5.2

[iio7]

Hmm. The strange part is that Vim is working without any issues.

[Shougo]

Really?
If so, your should check your msgpack's version in Vim/neovim.

:python3 import msgpack
:python3 print(msgpack.version)

It must be (1, 0, 0).

[iio7]

It is not.

Deoplete works fine in Vim with the version I have. It is only on Neovim it complains.

[Shougo]

So you need to update msgpack package in the Python.

[Shougo]

Deoplete works fine in Vim with the version I have. It is only on Neovim it complains.

Really?? I don't know why. It should not work both Vim8/neovim.

[pmyjavec]

In the future it might be a good idea to think about the implications of updating a critical dependency like this as a lot of people aren't going to have access to the latest message pack without a few hacks to their system.

I had this issue and for now I'll downgrade deoplete.

[Shougo]

I need to update msgpack by breaking changes.
Please read this.

https://github.com/Shougo/deoplete.nvim/issues/1071

[e-kwsm]

python3 -mpip install --user -U msgpack should work. If not, I beleive it is python's import problem rather than deoplete's.

[Shougo]

Yes. It is not deoplete problem...
But many many people complain about it.

OK. I have added for old msgpack compatibility.
It should work with old msgpack.

@pmyjavec Please use the latest version of deoplete.

[pakdev]

@Shougo I'm still seeing this issue with the latest commit (e652df7)

[Shougo]

Really?
I have removed deoplete requires msgpack 1.0.0+ check.
Note: Please search my code.
So why it is displayed? It is horror??

[Shougo]

And your information is not reproduce-able.
So I ignore your comment

You need to upload more information like this.
https://github.com/Shougo/deoplete.nvim/issues/1077#issue-571309115

[pakdev]

I modified autoload/health/deoplete.nvim to verify that it's still checking for 1.0.0+ as shown:

~/.config/nvim/plugged/deoplete.nvim master* ⇣
λ git diff
diff --git a/autoload/health/deoplete.vim b/autoload/health/deoplete.vim
index 9736570..14840c7 100644
--- a/autoload/health/deoplete.vim
+++ b/autoload/health/deoplete.vim
@@ -50,7 +50,7 @@ function! s:check_required_msgpack() abort
     call health#report_ok('Require msgpack 1.0.0+ was successful')
   else
     call health#report_error(
-          \ 'Require msgpack 1.0.0+ was not successful',
+          \ 'Here: Require msgpack 1.0.0+ was not successful',
           \ 'Please install/upgrade msgpack 1.0.0+.')
   endif
 endfunction

~/.config/nvim/plugged/deoplete.nvim master* ⇣
λ git log
commit e652df7eaa3d024182f8e124e4f0dafe40ed3a29 (grafted, HEAD -> master)
Author: Shougo Matsushita <[email protected]>
Date:   Thu Mar 26 08:33:53 2020 +0900

    Improve changedtick

Result from Neovim's :checkhealth (notice modification present):

## deoplete.nvim
  - OK: exists("v:t_list") was successful
  - OK: has("timers") was successful
  - OK: has("python3") was successful
  - OK: Require Python 3.6.1+ was successful
  - ERROR: Here: Require msgpack 1.0.0+ was not successful
    - ADVICE:
      - Please install/upgrade msgpack 1.0.0+.

So, it seems like you still need to remove that check if it doesn't actually require 1.0.0+.

[Shougo]

Ah, OK. deoplete now checks msgpack version in :checkhealth.
But it does not check otherwise.

So you can use deoplete in the older version with old msgpack.

Why the check exists?
Because I recommend for users to use the latest version of msgpack.

[Shougo]

In older version, https://github.com/Shougo/deoplete.nvim/issues/1077#issue-571309115

The check existed in deoplete initialization.
So users needed to install msgpack latest version to use deoplete.
I have removed the check.

[pakdev]

If the latest version of msgpack is not required, why even suggest it? Installing the latest version in Arch linux requires the workaround suggested by @e-kwsm, which is non-ideal.

[Shougo]

Installing the latest version in Arch linux requires the workaround suggested by @e-kwsm, which is non-ideal.

This is Arch problem. It is not deoplete problem.
I need to add workaround for Arch in deoplete.

[Shougo]

So you should ask to Arch maintainer why msgpack is not updated yet.

[Shougo]

msgpack in Arch is not updated after one month+.
It is not normal update behavior in Arch(It should be updated one week later after released).

Note: I think the change is blocked to breaking change in msgpack 1.0.

[TC72]

In case it helps someone else my problem was it not using the correct python, had to make sure this was updated:
let g:python3_host_prog = '/Users/YOURUSERNAME/opt/miniconda3/bin/python'

[nicoandresr]

python3 -mpip install --user -U msgpack should work. If not, I beleive it is python's import problem rather than deoplete's.

Wow this works for me! thanks!