Generic On-Demand Loading

[igbanam]

We currently have on-demand loading for Plug triggers and for filetypes. I think it may be beneficial to have some generic on-demand loading.

Usage would be something like so

vim9script

# snipped ✂️  for brevity

Plug 'igbanam/bob.vim', { 'when': 'InBazelProject' }

def g:InBazelProject(): bool
  # function body ... snipped ✂️ 
enddef

This is just one example. Ideally, people should be able to craft any set of preconditions to load a plugin. The only requirement maybe could be that the function referenced in the 'when' clause must meet two strict requirements

1. Must receive no arguments
2. Must be global — i.e. g:FuncName
3. Must return a bool

 

---

• Type:
  • [ ] Bug
  • [ ] Enhancement
  • [x] Feature Request
  • [ ] Question
• OS:
  • [x] All/Other
  • [ ] Linux
  • [ ] macOS
  • [ ] Windows
• Vim:
  • [x] Terminal Vim — this is what I use, but I don't see why this feature can't apply to all
  • [ ] GVim
  • [ ] Neovim

[junegunn]

When should vim-plug call the function? For that to work, vim-plug needs to call the function on every Vim event, and that is neither possible nor practical.

To load a plugin on a custom event, see https://github.com/junegunn/vim-plug/wiki/tips#loading-plugins-manually