Exclude plugins from loading in specified file types

[bojanmilevski]

It would be nice to exclude certain plugins from being loaded in certain files and/or filetypes. This would greatly increase performance and usability in lower-spec machines (like the Raspberry Pi for example), where resources are limited.

In my everyday-to-day use, I find myself constantly editing *.txt files - such as todo.txt, shopping-cart.txt or albums.txt, where most of my plugins are just not necessary. I certainly do not need lsp-config loading in these files.

To further explain my request, here is a very dumb, yet practical example of what I mean:

require('packer').startup(function(use)

    use {
        'neovim/nvim-lspconfig',
        exclude_file = '*.txt' -- accepts regex
    }

    use {
        'L3MON4D3/LuaSnip',
        exclude_file = 'main.rs'
    }

    use 'nvim-telescope/telescope.nvim'

end)

This would mean that any file ending in .txt (regex'd) would not load nvim-lspconfig and any file named main.rs (no hate to rustaceans), would not load LuaSnip, but both would load telescope.nvim.

Looking forward on collaborating and contributing!

[XVilka]

It also makes sense for using NeoVim as a pager:

• https://github.com/rkitover/vimpager
• https://github.com/lucc/nvimpager

For example, when opening man or info pages, or when used as git diff/git rebase, etc editor, you got the idea.

[nat-418]

See this issue for a discussion on how to use the opt to lazy load plugins per filetype: https://github.com/wbthomason/packer.nvim/discussions/946

In a sense this is the opposite of what you are asking for, but it might get you the behavior you want in the end.