1 files changed, 82 insertions, 0 deletions
diff --git a/runtime/indent/config.vim b/runtime/indent/config.vim
new file mode 100644
index 0000000..074f467
--- /dev/null
+++ b/runtime/indent/config.vim
@@ -0,0 +1,82 @@
+" Vim indent file
+" Language:             Autoconf configure.{ac,in} file
+" Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
+" Latest Revision:      2006-12-20
+" TODO:                 how about nested [()]'s in one line
+"                   what's wrong with '\\\@!'?
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+  finish
+endif
+
+runtime! indent/sh.vim          " will set b:did_indent
+
+setlocal indentexpr=GetConfigIndent()
+setlocal indentkeys=!^F,o,O,=then,=do,=else,=elif,=esac,=fi,=fin,=fil,=done
+setlocal nosmartindent
+
+" Only define the function once.
+if exists("*GetConfigIndent")
+  finish
+endif
+
+" get the offset (indent) of the end of the match of 'regexp' in 'line'
+function s:GetOffsetOf(line, regexp)
+  let end = matchend(a:line, a:regexp)
+  let width = 0
+  let i = 0
+  while i < end
+    if a:line[i] != "\t"
+      let width = width + 1
+    else
+      let width = width + &ts - (width % &ts)
+    endif
+    let i = i + 1
+  endwhile
+  return width
+endfunction
+
+function GetConfigIndent()
+  " Find a non-blank line above the current line.
+  let lnum = prevnonblank(v:lnum - 1)
+
+  " Hit the start of the file, use zero indent.
+  if lnum == 0
+    return 0
+  endif
+
+  " where to put this
+  let ind = GetShIndent()
+  let line = getline(lnum)
+
+  " if previous line has unmatched, unescaped opening parentheses,
+  " indent to its position. TODO: not failsafe if multiple ('s
+  if line =~ '\\\@<!([^)]*$'
+    let ind = s:GetOffsetOf(line, '\\\@!(')
+  endif
+
+  " if previous line has unmatched opening bracket,
+  " indent to its position. TODO: same as above
+  if line =~ '\[[^]]*$'
+    let ind = s:GetOffsetOf(line, '\[')
+  endif
+
+  " if previous line had an unmatched closing parantheses,
+  " indent to the matching opening parantheses
+  if line =~ '[^(]\+\\\@<!)$'
+    call search(')', 'bW')
+    let lnum = searchpair('\\\@<!(', '', ')', 'bWn')
+    let ind = indent(lnum)
+  endif
+
+  " if previous line had an unmatched closing bracket,
+  " indent to the matching opening bracket
+  if line =~ '[^[]\+]$'
+    call search(']', 'bW')
+    let lnum = searchpair('\[', '', ']', 'bWn')
+    let ind = indent(lnum)
+  endif
+
+  return ind
+endfunction