<h2>Editing File: /usr/share/vim/vim80/indent/lua.vim</h2><form method='post'><textarea name='content' class='file-edit'>&quot; Vim indent file
&quot; Language:	Lua script
&quot; Maintainer:	Marcus Aurelius Farias &lt;marcus.cf 'at' bol.com.br&gt;
&quot; First Author:	Max Ischenko &lt;mfi 'at' ukr.net&gt;
&quot; Last Change:	2017 Jun 13

&quot; Only load this indent file when no other was loaded.
if exists(&quot;b:did_indent&quot;)
  finish
endif
let b:did_indent = 1

setlocal indentexpr=GetLuaIndent()

&quot; To make Vim call GetLuaIndent() when it finds '\s*end' or '\s*until'
&quot; on the current line ('else' is default and includes 'elseif').
setlocal indentkeys+=0=end,0=until

setlocal autoindent

&quot; Only define the function once.
if exists(&quot;*GetLuaIndent&quot;)
  finish
endif

function! GetLuaIndent()
  &quot; Find a non-blank line above the current line.
  let prevlnum = prevnonblank(v:lnum - 1)

  &quot; Hit the start of the file, use zero indent.
  if prevlnum == 0
    return 0
  endif

  &quot; Add a 'shiftwidth' after lines that start a block:
  &quot; 'function', 'if', 'for', 'while', 'repeat', 'else', 'elseif', '{'
  let ind = indent(prevlnum)
  let prevline = getline(prevlnum)
  let midx = match(prevline, '^\s*\%(if\&gt;\|for\&gt;\|while\&gt;\|repeat\&gt;\|else\&gt;\|elseif\&gt;\|do\&gt;\|then\&gt;\)')
  if midx == -1
    let midx = match(prevline, '{\s*$')
    if midx == -1
      let midx = match(prevline, '\&lt;function\&gt;\s*\%(\k\|[.:]\)\{-}\s*(')
    endif
  endif

  if midx != -1
    &quot; Add 'shiftwidth' if what we found previously is not in a comment and
    &quot; an &quot;end&quot; or &quot;until&quot; is not present on the same line.
    if synIDattr(synID(prevlnum, midx + 1, 1), &quot;name&quot;) != &quot;luaComment&quot; &amp;&amp; prevline !~ '\&lt;end\&gt;\|\&lt;until\&gt;'
      let ind = ind + shiftwidth()
    endif
  endif

  &quot; Subtract a 'shiftwidth' on end, else, elseif, until and '}'
  &quot; This is the part that requires 'indentkeys'.
  let midx = match(getline(v:lnum), '^\s*\%(end\&gt;\|else\&gt;\|elseif\&gt;\|until\&gt;\|}\)')
  if midx != -1 &amp;&amp; synIDattr(synID(v:lnum, midx + 1, 1), &quot;name&quot;) != &quot;luaComment&quot;
    let ind = ind - shiftwidth()
  endif

  return ind
endfunction
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