latest nvim startup python issue from has('python') ?

[mckellygit]

@TaDaa, hi Thank you so much for vimade. With the latest neovim commits I now see this at nvim startup -

Error detected while processing function provider#pythonx#Detect[1]..provider#pythonx#DetectByModule[1]..<SNR>28_get_python_executable_from_host_var:
line    1:
E605: Exception not caught: unsupported
Press ENTER or type command to continue

But I think my python is ok ?

## Python 3 provider (optional)
  - INFO: Using: g:python3_host_prog = "/usr/bin/python3.8"
  - INFO: Executable: /usr/bin/python3.8
  - INFO: Python version: 3.8.10
  - INFO: pynvim version: 0.4.3
  - OK: Latest pynvim is installed.

## Python virtualenv
  - OK: no $VIRTUAL_ENV

and

% python --version
Python 3.8.10
% python3 --version
Python 3.8.10

This seems to be from pythonx.vim -

function! s:get_python_executable_from_host_var(major_version) abort
  return expand(get(g:, 'python'.(a:major_version == 3 ? '3' : execute("throw 'unsupported'")).'_host_prog', ''), v:true)
endfunction

I tracked it down to vimade plugin here -

    let g:vimade_features.has_python = has('python')

I do not understand why has('python') would cause the major_version to be 2, since my default python command is python3.8.10, but this is the line that somehow causes a python2 dependency in nvim. Do you have any idea why or a way to configure around this ? Perhaps I just need to remove python2 from my machine but I wonder if you know more. thx, -m

[mckellygit]

Something like this in autoload/vimade.vim is a workaround, but I don't want to change the plugin or build up all of g:vimade_features manually -

    if has('python3')
        let g:vimade_features.has_python  = v:false
        let g:vimade_features.has_python3 = v:true
    elseif has('python')
        let g:vimade_features.has_python  = v:true
        let g:vimade_features.has_python3 = v:false
    else
        let g:vimade_features.has_python  = v:false
        let g:vimade_features.has_python3 = v:false
    endif

[mckellygit]

There are some others finding has('python') causes the same issue so perhaps more research and testing of the nvim commit is needed. See https://github.com/neovim/neovim/pull/17252

[TaDaa]

Thanks for the details and opening the issue. Added a workaround that should solve the problem for the time being -- lmk if you still run into issues.

[mckellygit]

No vimade changes needed. Its an issue with some older nvim runtime files. After removing the nvim runtime files before a make install the error no longer happens. take care, -m