set tabstop doesn't works

[palandovalex]

• nvim --version: v0.4.3
• Operating system/version: linux mint 20.1
• Terminal name/version: terminator 1.91

in my .config/nvim/init.vim. i add:

set runtimepath^=~/.vim runtimepath+=~/.vim/after
let &packpath=&runtimepath
source ~/.vimrc

So, other parametrs from .vimrc works correctly.

But... I set in .vimrc parametrs:

 set expandtab                               
 set tabstop=2

In vim(Vi IMproved 8.1) this works correctly.

But in nvim - this doesn't work.

Actual behaviour

tab add 8 spaces

Expected behaviour

tab should add 2 spaces

[clason]

Neovim doesn't read .vimrc at all, it uses .config/nvim/init.vim.

[palandovalex]

Neovim doesn't read .vimrc at all, it uses .config/nvim/init.vim.

in my .config/nvim/init.vim. i add:

set runtimepath^=~/.vim runtimepath+=~/.vim/after
let &packpath=&runtimepath
source ~/.vimrc

So, other parametrs from .vimrc works correctly.

[clason]

Does it work if you set it in your init.vim directly? Can you reproduce it on the latest nightly?

[chrisbra]

Note, that tabstop is a buffer-local option, that means it can (and probably will) be overridden by filetype plugins. Meaning, it matters in which file you check the value of the tabstop option. Check :verbose set ts?

[matu3ba]

@chrisbra This lua code does not work. I never understood softtabstop and in treesitter they set it to 0 for tests, so I copied that.

  vim.bo.expandtab        = true; --use space character on pressing Tab key
  vim.bo.softtabstop      = 0; --Tab and BS: insert+delete number of spaces
  if ( vim.bo.filetype == "cpp" ) then -- something is very broken here
    vim.bo.shiftwidth       = 4; --visual mode >,<-key: number of spaces for indendation
  else
    vim.bo.shiftwidth       = 2;
  end
  if ( vim.bo.filetype == "cpp" ) then -- something is very broken here
    vim.bo.tabstop          = 4; --Tab key: number of spaces for indendation
  else
    vim.bo.tabstop          = 2;
  end

and sets always to 2.
Ie for neovim -u init.lua min.cpp containing that file indentation is not 4, but 2.
min.cpp:

int main() {
    //minimal example file
    int a = 3;
    if (a == 3)
    {//cursor here
    }
}

int main() {
    //minimal example file
    int a = 3;
    if (a == 3)
    {
      //cursor here
    }
}

However having no branching to check the filetype, the code works.
Should I create a new issue for this?

[gpanders]

Take a look at :h 'shiftwidth', :h 'softtabstop', and :h 'smarttab'. In particular, I suspect the reason this works for you in Vim but not Neovim is that Neovim sets 'smarttab' on by default.

In any case, this doesn't appear to be a bug.