Change latex provider to luatex, closes #476

autoload/vimtex/parser/tex.vim

@@ -0,0 +1,205 @@
+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#parser#tex#parse(file, opts) abort " {{{1
+  let l:opts = extend({
+        \ 'detailed': 1,
+        \ 'root' : exists('b:vimtex.root') ? b:vimtex.root : '',
+        \}, a:opts)
+
+  let l:cache = vimtex#cache#open('texparser', {
+        \ 'local': 1,
+        \ 'persistent': 0,
+        \ 'default': {'ftime': -2},
+        \})
+
+  let l:parsed = s:parse(a:file, l:opts, l:cache)
+
+  if !l:opts.detailed
+    call map(l:parsed, 'v:val[2]')
+  endif
+
+  return l:parsed
+endfunction
+
+" }}}1
+function! vimtex#parser#tex#parse_files(file, opts) abort " {{{1
+  let l:opts = extend({
+        \ 'root' : exists('b:vimtex.root') ? b:vimtex.root : '',
+        \}, a:opts)
+
+  let l:cache = vimtex#cache#open('texparser', {
+        \ 'local': 1,
+        \ 'persistent': 0,
+        \ 'default': {'ftime': -2},
+        \})
+
+  return vimtex#util#uniq_unsorted(
+        \ s:parse_files(a:file, l:opts, l:cache))
+endfunction
+
+" }}}1
+function! vimtex#parser#tex#parse_preamble(file, opts) abort " {{{1
+  let l:opts = extend({
+          \ 'inclusive' : 0,
+          \ 'root' : exists('b:vimtex.root') ? b:vimtex.root : '',
+          \}, a:opts)
+
+  return s:parse_preamble(a:file, l:opts, [])
+endfunction
+
+" }}}1
+
+function! s:parse(file, opts, cache) abort " {{{1
+  let l:current = a:cache.get(a:file)
+  let l:ftime = getftime(a:file)
+  if l:ftime > l:current.ftime
+    let l:current.ftime = l:ftime
+    call s:parse_current(a:file, a:opts, l:current)
+  endif
+
+  let l:parsed = []
+
+  for l:val in l:current.lines
+    if type(l:val) == type([])
+      call add(l:parsed, l:val)
+    else
+      call extend(l:parsed, s:parse(l:val, a:opts, a:cache))
+    endif
+  endfor
+
+  return l:parsed
+endfunction
+
+" }}}1
+function! s:parse_files(file, opts, cache) abort " {{{1
+  let l:current = a:cache.get(a:file)
+  let l:ftime = getftime(a:file)
+  if l:ftime > l:current.ftime
+    let l:current.ftime = l:ftime
+    call s:parse_current(a:file, a:opts, l:current)
+  endif
+
+  " Only include existing files
+  if !filereadable(a:file) | return [] | endif
+
+  let l:files = [a:file]
+  for l:file in l:current.includes
+    let l:files += s:parse_files(l:file, a:opts, a:cache)
+  endfor
+
+  return l:files
+endfunction
+
+" }}}1
+function! s:parse_current(file, opts, current) abort " {{{1
+  let a:current.lines = []
+  let a:current.includes = []
+
+  " Also load includes from glsentries
+  let l:re_input = g:vimtex#re#tex_input . '|^\s*\\loadglsentries'
+
+  if filereadable(a:file)
+    let l:lnum = 0
+    for l:line in readfile(a:file)
+      let l:lnum += 1
+      call add(a:current.lines, [a:file, l:lnum, l:line])
+
+      " Minor optimization: Avoid complex regex on "simple" lines
+      if stridx(l:line, '\') < 0 | continue | endif
+
+      if l:line =~# l:re_input
+        let l:file = s:input_parser(l:line, a:file, a:opts.root)
+        call add(a:current.lines, l:file)
+        call add(a:current.includes, l:file)
+      endif
+    endfor
+  endif
+endfunction
+
+" }}}1
+function! s:parse_preamble(file, opts, parsed_files) abort " {{{1
+  if !filereadable(a:file) || index(a:parsed_files, a:file) >= 0
+    return []
+  endif
+  call add(a:parsed_files, a:file)
+
+  let l:lines = []
+  for l:line in readfile(a:file)
+    if l:line =~# '\\begin\s*{document}'
+      if a:opts.inclusive
+        call add(l:lines, l:line)
+      endif
+      break
+    endif
+
+    call add(l:lines, l:line)
+
+    if l:line =~# g:vimtex#re#tex_input
+      let l:file = s:input_parser(l:line, a:file, a:opts.root)
+      call extend(l:lines, s:parse_preamble(l:file, a:opts, a:parsed_files))
+    endif
+  endfor
+
+  return l:lines
+endfunction
+
+" }}}1
+
+function! s:input_parser(line, current_file, root) abort " {{{1
+  " Handle \space commands
+  let l:file = substitute(a:line, '\\space\s*', ' ', 'g')
+
+  " Handle import package commands
+  if l:file =~# g:vimtex#re#tex_input_import
+    let l:root = l:file =~# '\\sub'
+          \ ? fnamemodify(a:current_file, ':p:h')
+          \ : a:root
+
+    let l:candidate = s:input_to_filename(
+          \ substitute(copy(l:file), '}\s*{', '', 'g'), l:root)
+    if !empty(l:candidate)
+      return l:candidate
+    else
+      return s:input_to_filename(
+          \ substitute(copy(l:file), '{.{-}}', '', ''), l:root)
+    endif
+  else
+    return s:input_to_filename(l:file, a:root)
+  endif
+endfunction
+
+" }}}1
+function! s:input_to_filename(input, root) abort " {{{1
+  let l:file = matchstr(a:input, '\zs[^{}]\+\ze}\s*\%(%\|$\)')
+
+  " Trim whitespaces and quotes from beginning/end of string
+  let l:file = substitute(l:file, '^\(\s\|"\)*', '', '')
+  let l:file = substitute(l:file, '\(\s\|"\)*$', '', '')
+
+  " Ensure that the file name has extension
+  if empty(fnamemodify(l:file, ':e'))
+    let l:file .= '.tex'
+  endif
+
+  if vimtex#paths#is_abs(l:file)
+    return l:file
+  endif
+
+  let l:candidate = a:root . '/' . l:file
+  if filereadable(l:candidate)
+    return l:candidate
+  endif
+
+  let l:candidate = vimtex#kpsewhich#find(l:file)
+  return filereadable(l:candidate) ? l:candidate : l:file
+endfunction
+
+" }}}1
+
+endif