Lazy loading Ultisnips and custom snippets

[pgilad]

Hi, I'm using NeoBundle to lazy load Ultisnips and Vim-Snippets in the following way:

NeoBundle 'honza/vim-snippets', {
            \ 'lazy': 1,
            \ 'autoload' : {
            \    'on_source': ['ultisnips']
            \  }
            \ }
NeoBundle 'SirVer/ultisnips', {
            \ 'depends': ['vim-snippets'],
            \ 'lazy': 1,
            \ 'autoload' : {
            \    'insert': 1
            \  }
            \ }

My intention is obviously to load Ultisnips only when going into insert mode, and then loading vim-snippets.

This works great the for supplied snippets in honza/vim-snippets but only after I re-open the current buffer, or edit a different buffer I can use my custom snippets.

My custom snippets work great alongside the factory snippets if I don't lazy load Ultisnips. They are defined like so:

set runtimepath+=~/.dotfiles
let g:UltiSnipsExpandTrigger="<tab>"
let g:UltiSnipsJumpForwardTrigger="<tab>"
let g:UltiSnipsJumpBackwardTrigger="<s-tab>"
let g:UltiSnipsSnippetsDir='~/.dotfiles/mysnippets'
let g:UltiSnipsSnippetDirectories=['UltiSnips', 'mysnippets']

Any help on how to successfully lazy load both plugins and have them work the second I enter insert mode in the same buffer?

[SirVer]

Lazy Loading is not supported by Vim in any way, i.e. it is a hack by your plugin manager. UltiSnips needs to know the runtimepath of snippets it should load, which is conflicting with lazy loading obviously. So no, there is no support from UltiSnips for this.

[Shougo]

I think you must initialization your custom snippet directory before UltiSnips loading.

[pgilad]

@Shougo Thanks for the tip! This actually work if I run call UltiSnips#FileTypeChanged() this works. Now gotta figure out how to run this on autoload and we'll be set!
@SirVer Thanks anyway!

[pgilad]

If anyone's interested the following setup works for me allowing me to lazy load Ultisnips & Vim-Snippets:

set runtimepath+=~/.dotfiles
let g:UltiSnipsExpandTrigger="<tab>"
let g:UltiSnipsJumpForwardTrigger="<tab>"
let g:UltiSnipsJumpBackwardTrigger="<s-tab>"
let g:UltiSnipsSnippetsDir='~/.dotfiles/mysnippets'
let g:UltiSnipsSnippetDirectories=['UltiSnips', 'mysnippets']

NeoBundle 'honza/vim-snippets', {
            \ 'lazy': 1,
            \ 'autoload': {
            \ 'on_source': ['ultisnips']
            \}
            \}
NeoBundle 'SirVer/ultisnips', {
            \ 'lazy': 1,
            \ 'autoload' : {
            \    'insert': 1
            \  }
            \ }
if neobundle#tap('ultisnips')
    function! neobundle#hooks.on_source(bundle)
        silent! call UltiSnips#FileTypeChanged()
    endfunction
    call neobundle#untap()
endif

@SirVer would it be interesting to add as a PR to the readme?

[SirVer]

Nope, that is too fragile for me to support it. I can point users here now though..

[kshenoy]

@pgilad Thanks! I was looking for something similar. Do you know if it's possible to enhance this by loading only when UltiSnips is triggered and not just enter insert mode?

[pgilad]

Depends on what you mean by "UltiSnips is triggered"

[kshenoy]

I mean, when you press <Tab> in insert mode i.e. when the UltiSnips#ExpandSnippetOrJump() is called.

[pgilad]

Yeah it's definitely possible. I would look into NeoBundle functions or function_prefix for autoload. (https://github.com/Shougo/neobundle.vim/blob/0b44247d063838e7709aeb225727020080cdc454/doc/neobundle.txt#L1051)