Configuring VimTeX in NvChad config

Question

I've been trying to configure vim-tex working on the NvChad configs. I got the :VimtexCompile working and giving me output pdf. But the usual <leader>ll is giving me these errors. Also in vim {{ would expand to \left{ \right}. It's not working with NeoVim. I'm using LuaSnip with friendly-snippets with the default config in NvChad.

This is my vim-tex config. Similar config is working fine in Vim

vim.g.tex_flavor = 'latex'
vim.g.vimtex_view_method = 'sioyek'
vim.g.vimtex_synctex = 1
vim.g.tex_conceal = 'abdmg'
vim.g.vimtex_compile_latexmk = {
  executable = "latexmk",
  OPTIONS = {
    "-xelatex",
    "-fine-line-error",
    "-synctex=1",
    "-interactions=nonstopmode",
  },
}

I need to do the following

1. Get the <leader>ll compiling my latex
2. Expand {{, ((, [[ to their respective latex code

Thank you in advance

Answer 1

The plugin is called VimTeX, not vim-tex.

But the usual <leader>ll is giving me these errors.

These errors are not from VimTeX. For some reason, it seems you have LaTeX-Suite (aka vim-latex) installed as well. You should remove that plugin from your system and try again.

If you do :map <leader>ll in a LaTeX file, you should see that it is mapped to <plug>(vimtex-compile). However, since you are having a plugin conflict, I'm quite confident that you will see something else.

Also in vim {{ would expand to \left{ \right}. It's not working with NeoVim. I'm using LuaSnip with friendly-snippets with the default config in NvChad.

You either 1) used LaTeX-Suite which has this feature built-in, 2) used a snippet plugin like UltiSnips and had this snippet, or 3) something else. To make it work now, you need to add it as a snippet with LuaSnip. I don't use that and can't help with it, sorry.

This is my vim-tex config.

You should remove vim.g.tex_flavor and vim.g.tex_conceal, they are not necessary. vim.g.vimtex_synctex is not a valid VimTeX option and has never been one. Finally, you should fix vim.g.vimtex_compile_latexmk because 1) the name is wrong, and 2) you are using it wrongly. Please read :help vimtex_compiler_latexmk and :help vimtex_compiler_latexmk_engines.

I believe this is the configuration you want:

vim.g.vimtex_view_method = 'sioyek'
vim.g.vimtex_compile_latexmk_engines = {
  ['_'] = '-xelatex',
}

Answer 2

2. Expand {{, ((, [[ to their respective LaTeX code with LuaSnip

I assume you have installed LuaSnip and VimTeX and configured them as desired.

For the automatic expansion you need

require("luasnip").config.setup({ enable_autosnippets = true })

Add following LuaSnip snippets e.g. to ~/.config/nvim/luasnippets/tex.lua:

-- Typical Abbreviations
local ls = require("luasnip")
local s = ls.snippet
local i = ls.insert_node
local fmta = require("luasnip.extras.fmt").fmta
-- ...

-- Include this `in_mathzone` function at the start of a snippets file...
local in_mathzone = function()
  -- The `in_mathzone` function requires the VimTeX plugin !!!
  return vim.fn['vimtex#syntax#in_mathzone']() == 1
end

return {
  s({trig = "{{", snippetType="autosnippet"},
    fmta("\\left\\{ <>\\right\\}<>", { i(1), i(2), }), {condition = in_mathzone}
  ),
  s({trig = "((", snippetType="autosnippet"},
    fmta("\\left( <>\\right)<>", { i(1), i(2), }), {condition = in_mathzone}
  ),
  s({trig = "[[", snippetType="autosnippet"},
    fmta("\\left[ <>\\right]<>", { i(1), i(2), }), {condition = in_mathzone}
  ),
}

You can load the LuaSnip snippets in your ~/.config/nvim/init.lua with

require("luasnip.loaders.from_lua").lazy_load({paths = "~/.config/nvim/luasnippets/"})

---

To learn more about LuaSnip in the context of LaTeX, there is a tutorial on following webpage:

https://www.ejmastnak.com/tutorials/vim-latex/luasnip

For more LuaSnip Snippets for the filetype LaTex, you can see following github repositories

• https://github.com/iurimateus/luasnip-latex-snippets.nvim
• https://github.com/ejmastnak/dotfiles/tree/main/config/nvim/LuaSnip/tex