Change latex provider to luatex, closes #476

autoload/vimtex/syntax.vim

@@ -0,0 +1,66 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'latex') == -1
+
+" vimtex - LaTeX plugin for Vim
+"
+" Maintainer: Karl Yngve Lervåg
+" Email:      karl.yngve@gmail.com
+"
+
+function! vimtex#syntax#init() abort " {{{1
+  if !get(g:, 'vimtex_syntax_enabled', 1) | return | endif
+
+  " The following ensures that syntax addons are not loaded until after the
+  " filetype plugin has been sourced. See e.g. #1428 for more info.
+  if exists('b:vimtex')
+    call vimtex#syntax#load()
+  else
+    augroup vimtex_syntax
+      autocmd!
+      autocmd User VimtexEventInitPost call vimtex#syntax#load()
+    augroup END
+  endif
+endfunction
+
+" }}}1
+function! vimtex#syntax#load() abort " {{{1
+  if s:is_loaded() | return | endif
+
+  " Initialize project cache (used e.g. for the minted package)
+  if !has_key(b:vimtex, 'syntax')
+    let b:vimtex.syntax = {}
+  endif
+
+  " Initialize b:vimtex_syntax
+  let b:vimtex_syntax = {}
+
+  " Reset included syntaxes (necessary e.g. when doing :e)
+  call vimtex#syntax#misc#include_reset()
+
+  " Set some better defaults
+  syntax spell toplevel
+  syntax sync maxlines=500
+
+  " Load some general syntax improvements
+  call vimtex#syntax#load#general()
+
+  " Load syntax for documentclass and packages
+  call vimtex#syntax#load#packages()
+
+  " Hack to make it possible to determine if vimtex syntax was loaded
+  syntax match texVimtexLoaded 'dummyVimtexLoadedText' contained
+endfunction
+
+" }}}1
+
+function! s:is_loaded() abort " {{{1
+  if exists('*execute')
+    let l:result = split(execute('syntax'), "\n")
+    return !empty(filter(l:result, 'v:val =~# "texVimtexLoaded"'))
+  else
+    return 0
+  endif
+endfunction
+
+" }}}1
+
+endif