doesn't detect tex format

[lx93uv]

Snippets doesn't expanded with tex file format.

vim 8, vim-plug

I am trying to add custom snippets; here is my .vimrc excerpt (without extra snippets collection plugins):

set guioptions-=T                                                               
set guioptions -=m                                                              

set gfn=Ubuntu\ Mono\ 12                                                        

imap jj <Esc>                                                                   
set nocompatible                                                                
syntax on                                                                       
filetype plugin indent on                                                       
set background=light                                                            
set noswapfile                                                                  
set colorcolumn=80                                                              
set nowrap                                                                      
set autoindent                                                                  
set softtabstop=2                                                               
set tabstop=2                                                                   
set shiftwidth=2                                                                
set expandtab                                                                   
set backspace=indent,eol,start                                                  

call plug#begin('~/.vim/plugged')                                               
  Plug 'tpope/vim-commentary'                                                   
  Plug 'SirVer/ultisnips'                                                       
  Plug 'easymotion/vim-easymotion'                                              
  Plug 'ctrlpvim/ctrlp.vim'                                                     
call plug#end()                                                                 

let g:EasyMotion_do_mapping = 0 " Disable default mappings                      
nmap <Space><Space> <Plug>(easymotion-overwin-f2)                               

" Turn on case insensitive feature                                              
let g:EasyMotion_smartcase = 1                                                  

" JK motions: Line motions                                                      
map <Leader>j <Plug>(easymotion-j)                                              
map <Leader>k <Plug>(easymotion-k)                                              

let g:UltiSnipsSnippetDirectories=$HOME.'/.vim/snippets'                        

let g:UltiSnipsExpandTrigger="<tab>"                                            
let g:UltiSnipsJumpForwardTrigger="<c-b>"                                       
let g:UltiSnipsJumpBackwardTrigger="<c-z>" 

ultisnips starts works only after execution UltiSnipsAddFiletypes tex. With other file types it works ok.

I had also check this with honzo plugin.

[lx93uv]

Command :UltiSnipsEdit opens plaintext.snippet.

[chrisrytting]

@lx93uv The same thing happened for me until my tex file actually had a preamble, at which point :UltiSnipsEdit opened the appropriate tex.snippet

[lx93uv]

@chrisrytting in my case it creates $PROJECT/UltiSnips/plaintext.snippets (per project) file.

[andreyorst]

in my case it creates $PROJECT/UltiSnips/plaintext.snippets (per project) file.

That's because

let g:UltiSnipsSnippetDirectories=$HOME.'/.vim/snippets'

is defined wrong in your vim config. First of all snippets directory name is reserved for snipMate snippets. Second, it should be list:

let g:UltiSnipsSnippetDirectories=[$HOME.'/.vim/UltiSnips']

[andreyorst]

Command :UltiSnipsEdit opens plaintext.snippet.

Correct me if I'm wrong, but it opens plaintex.snippets, not plaintext.snippets. Plaintex is selected when file is empty on open, but contains .tex extension. However if tex file contains preamble, vim deduces it as tex filetype. Therefore snippets will work, because, they are defined for tex filetype.

The same situation occurs if you will open empty file script.txt in vim. It will be opened with text filetype. But if you add #!/bin/bash to the begining of this file, save it, and reopen, Vim will detect header, and switch to sh filetype, despite the fact that file has .txt extension. That's useful because most of files in linux are not containing extensions, and because vim need to know what type of file it opens, to use filetype indent and other ft features, it deduces fyletype from file contents.

I'm closing it, since it is not a bug.

[andreyorst]

As a workaround I can suggest creating an plaintex.snippets file, which contains standard Ultisnips facility - extends tex. Maybe it should be suggested to https://github.com/honza/vim-snippets as PR. I'm not LaTeX vim expert, so i don't know, maybe plaintex and tex are very different, and should use different snippets.