feature request: disable formatting on certain file patterns

[Jarmos-san]

Did you check existing requests?

• [X] I have searched the existing issues

Describe the feature

Disable formatting using conform.nvim on certain file patterns like /tmp/1234567.md and so on.

Provide background

In my configurations I have enabled conform.nvim to format ALL Markdown files. On certain file patterns like /tmp/123455.md this is an undesired behaviour.

These temporary files are used by tools like gh (GitHub CLI) to create temporary Markdown content using Neovim before they are shipped to the GitHub servers for final rendering on the Web UI. Since conform.nvim will format the files according to the instructions I have laid out for it, such temporary Markdown files often get rendered undesirably on GitHub's web UI.

I use gh extensively and having to fix the formatting of the Markdown content on the web UI is annoying and if possible I would like an option to disable it on the said temporary file patterns.

What is the significance of this feature?

strongly desired

Additional details

No response

[stevearc]

Take a look at the recipe for adding extra features to autoformatting.

[Jarmos-san]

Alright thanks for guiding me to the right place for help! For future reference and if anyone is interested in it, here's a snippet of the code I used:

format_on_save = function(bufnr)
  local bufname = vim.api.nvim_buf_get_name(bufnr)

  -- Disable file formatting on any temporary buffer contents
  if bufname:match("/tmp/") then
    return
  else
    return {
      timeout_ms = 2500,
      lsp_fallback = true,
    }
  end
end