`cmdheight` gets overridden to 1 upon nvim-dap-ui starts

[Frederick888]

I have cmdheight=2 as default and however nvim-dap-ui sets it to 1. I don't have this issue if I use nvim-dap without nvim-dap-ui.

My nvim-dap/-ui config:

" nvim-dap
if has('nvim')
  lua << EOF
    local dap, dapui = require('dap'), require('dapui')
    require('dap-go').setup()
    dapui.setup()
    vim.fn.sign_define('DapBreakpoint',          { text='●', texthl='', linehl='debugBreakpoint', numhl='debugBreakpoint' })
    vim.fn.sign_define('DapBreakpointCondition', { text='◆', texthl='', linehl='debugBreakpoint', numhl='debugBreakpoint' })
    vim.fn.sign_define('DapStopped',             { text='▶', texthl='', linehl='debugPC',         numhl='debugPC' })
    dap.listeners.after.event_initialized["dapui_config"] = function()
      dapui.open()
    end
    dap.listeners.before.event_terminated["dapui_config"] = function()
      dapui.close()
    end
    dap.listeners.before.event_exited["dapui_config"] = function()
      dapui.close()
    end
EOF
  function! s:dap_ui_evaluate(expression) abort
    let escaped_expression = escape(a:expression, '"\')
    execute 'lua require("dapui").eval("' . l:escaped_expression . '")'
  endfunction
  command! -nargs=1 DapEvaluate  :call <SID>dap_ui_evaluate(<f-args>)
  nnoremap <silent> <F5>         :lua require('dap').continue()<CR>
  nnoremap <silent> <F17>        :lua require('dap').reverse_continue()<CR>
  nnoremap <silent> <leader><F5> :lua require('dap').run_to_cursor()<CR>
  nnoremap <silent> <F10>        :lua require('dap').step_over()<CR>
  nnoremap <silent> <F22>        :lua require('dap').step_back()<CR>
  nnoremap <silent> <F11>        :lua require('dap').step_into()<CR>
  nnoremap <silent> <F23>        :lua require('dap').step_out()<CR>
  nnoremap <silent> <F6>         :lua require('dap').pause()<CR>
  nnoremap <silent> <F9>         :lua require('dap').toggle_breakpoint()<CR>
  nnoremap <silent> <leader><F9> :lua require('dap').set_breakpoint(vim.fn.input('Breakpoint condition: '))<CR>
  nnoremap <silent> <F33>        :lua require('dap').set_breakpoint(nil, nil, vim.fn.input('Log point message: '))<CR>
  nnoremap <silent> <M-S-F9>     :lua require('dap').clear_breakpoints()<CR>
  nnoremap <silent> <M-S-F10>    :lua require('dap').terminate()<CR>
  nnoremap <silent> <leader>e    :lua require('dapui').eval()<CR>
  xnoremap <silent> <leader>e    <Cmd>lua require('dapui').eval()<CR>
  nnoremap          <leader>E    :DapEvaluate<space>
  autocmd  FileType dap-float    nnoremap <silent> q :q<CR>
  autocmd  FileType dap-repl     lua require('dap.ext.autocompl').attach()
endif

Neovim version:

NVIM v0.7.0
Build type: Release
LuaJIT 2.1.0-beta3
Compiled by builduser

Features: +acl +iconv +tui
See ":help feature-compile"

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/share/nvim"

Run :checkhealth for more info

[rcarriga]

Ah I see why this is happening, I'll have to tinker around to prevent this

[rcarriga]

Tried to find a way to handle this without just resetting the value but doesn't seem possible with how NeoVim handles resizing windows. Added a fix in latest commit to just reset after opening/closing the windows

[ByteDrummer]

When I toggle the UI several times with the latest version, I notice that the "DAP Watches" and repl split shrink if I have cmdheight=2. I'm assuming this bug is related.

[ByteDrummer]

Here's a recording of it:

[rcarriga]

This is not related AFAIK to the cmdheight fix but is due to the way the window sizing logic works. There can rounding issues. Although I haven't solved the underlying problem, you can use the reset argument to the open and toggle functions. Related issue https://github.com/rcarriga/nvim-dap-ui/issues/116

Also closing this issue as it's been solved.