I have no idea

lua/config/preview.lua

@@ -0,0 +1,17 @@
+local u = require 'config.utils'
+
+local g = vim.api.nvim_create_augroup('preview', {})
+
+vim.api.nvim_create_autocmd('BufWritePost', {
+    group = g,
+    pattern = '*.tex',
+    callback = function(arg)
+        local dir = arg.file:match('.*/')
+        local args = ''
+        if dir ~= nil then
+            args = '-output-directory=\''..dir..'\' '
+        end
+        vim.cmd('silent exec "!pdflatex '..args..'\''..arg.file..'\'"')
+    end
+})
+