[Question] How to prevent keeping history of changes (undo list) made by TSTools* commands?

[Al3bad]

Currently I have a setup to format and run TSToolsSortImports command when saving the buffer but the changes made by TSToolsSortImports are added in the undo list. Is it possible to prevent that?

The command gets executed with vim.cmd api:

vim.cmd 'TSToolsSortImports'

I've tried with the sync argument and using undojoin but nothing worked.

this is the current setup I have:

return {
  'stevearc/conform.nvim',
  opts = {
    notify_on_error = true,
    format_on_save = function(bufnr)
      if vim.g.disable_autoformat or vim.b[bufnr].disable_autoformat then
        return
      end
      local lsp_format_opt
      local disable_filetypes = { c = true, cpp = true }
      if disable_filetypes[vim.bo[bufnr].filetype] then
        lsp_format_opt = 'never'
      else
        lsp_format_opt = 'fallback'
      end

      -- Javascript/Typescript: Sort imports
      for _, value in ipairs { 'javascript', 'typescript', 'javascripteract', 'typescriptreact' } do
        if vim.bo[bufnr].filetype == value then
          vim.cmd 'TSToolsSortImports'

          -- attempt 1
          -- vim.cmd.undojoin()
          -- vim.cmd 'TSToolsSortImports'

          -- attempt 2
          -- vim.cmd.undojoin()
          -- vim.cmd 'TSToolsSortImports sync'
        end
      end

      return { timeout_ms = 500, lsp_format = lsp_format_opt }
    end,
    formatters_by_ft = {
      lua = { 'stylua' },
      yaml = { 'prettierd' },
      html = { 'prettierd' },
      css = { 'prettierd' },
      javascript = { 'prettierd' },
      typescript = { 'prettierd' },
      javascriptreact = { 'prettierd' },
      typescriptreact = { 'prettierd' },
    },
  },
}