I am getting `E121: Undefined variable: g:which_key_map`.

[aasutossh]

• OS: Pop!_OS 19.10
• (Neo)Vim version: NVIM v0.5.0-nightly-6-g6ca7ebb
• vim-which-key version: Just installed using Plug
• Have you reproduced with a minimal vimrc: yes

Describe the bug

let g:which_key_map['w'] = {
      \ 'name' : '+windows' ,
      \ 'w' : ['<C-W>w'     , 'other-window']          ,
      \ 'd' : ['<C-W>c'     , 'delete-window']         ,
      \ '-' : ['<C-W>s'     , 'split-window-below']    ,
      \ '|' : ['<C-W>v'     , 'split-window-right']    ,
      \ '2' : ['<C-W>v'     , 'layout-double-columns'] ,
      \ 'h' : ['<C-W>h'     , 'window-left']           ,
      \ 'j' : ['<C-W>j'     , 'window-below']          ,
      \ 'l' : ['<C-W>l'     , 'window-right']          ,
      \ 'k' : ['<C-W>k'     , 'window-up']             ,
      \ 'H' : ['<C-W>5<'    , 'expand-window-left']    ,
      \ 'J' : ['resize +5'  , 'expand-window-below']   ,
      \ 'L' : ['<C-W>5>'    , 'expand-window-right']   ,
      \ 'K' : ['resize -5'  , 'expand-window-up']      ,
      \ '=' : ['<C-W>='     , 'balance-window']        ,
      \ 's' : ['<C-W>s'     , 'split-window-below']    ,
      \ 'v' : ['<C-W>v'     , 'split-window-below']    ,
      \ '?' : ['Windows'    , 'fzf-window']            ,
      \ }

causes the error. Saying E121: Undefined variable: g:which_key_map

To Reproduce
Steps to reproduce the behavior:

1. Create the minimal vimrc min.vim: https://termbin.com/q6fm

set nocompatible
set runtimepath^=/path/to/vim-which-key
syntax on
filetype plugin indent on
set timeoutlen=500
let g:mapleader = "\<Space>"
let g:maplocalleader = ','
nnoremap <silent> <leader>      :<c-u>WhichKey '<Space>'<CR>
nnoremap <silent> <localleader> :<c-u>WhichKey  ','<CR>

let g:which_key_map['w'] = {
      \ 'name' : '+windows' ,
      \ 'w' : ['<C-W>w'     , 'other-window']          ,
      \ 'd' : ['<C-W>c'     , 'delete-window']         ,
      \ '-' : ['<C-W>s'     , 'split-window-below']    ,
      \ '|' : ['<C-W>v'     , 'split-window-right']    ,
      \ '2' : ['<C-W>v'     , 'layout-double-columns'] ,
      \ 'h' : ['<C-W>h'     , 'window-left']           ,
      \ 'j' : ['<C-W>j'     , 'window-below']          ,
      \ 'l' : ['<C-W>l'     , 'window-right']          ,
      \ 'k' : ['<C-W>k'     , 'window-up']             ,
      \ 'H' : ['<C-W>5<'    , 'expand-window-left']    ,
      \ 'J' : ['resize +5'  , 'expand-window-below']   ,
      \ 'L' : ['<C-W>5>'    , 'expand-window-right']   ,
      \ 'K' : ['resize -5'  , 'expand-window-up']      ,
      \ '=' : ['<C-W>='     , 'balance-window']        ,
      \ 's' : ['<C-W>s'     , 'split-window-below']    ,
      \ 'v' : ['<C-W>v'     , 'split-window-below']    ,
      \ '?' : ['Windows'    , 'fzf-window']            ,
      \ }

2. Start (neo)vim with command: vim -u min.vim

3. You'll see error popping up saying E121: Undefined variable: g:which_key_map

Expected behavior
I thought when I press Space w it would open up the popup with above dictionary information.

Screenshots

[liuchengxu]

Your vimrc is wrong, read the doc carefully, and see this example https://github.com/liuchengxu/vim-which-key/wiki/mimimal-vimrc .

[aasutossh]

So how about specifying that in the README?

Thanks, so defining the global variable was the fix.

[liuchengxu]

Feel free to PR.

[yatesco]

#249