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
})