--- a/runtime/indent/sh.vim
+++ b/runtime/indent/sh.vim
@@ -1,7 +1,7 @@
 " Vim indent file
-" Language:	    Shell Script
+" Language:         Shell Script
 " Maintainer:       Nikolai Weibull <now@bitwi.se>
-" Latest Revision:  2006-04-19
+" Latest Revision:  2010-01-06
 
 if exists("b:did_indent")
   finish
@@ -9,8 +9,10 @@ endif
 let b:did_indent = 1
 
 setlocal indentexpr=GetShIndent()
-setlocal indentkeys+==then,=do,=else,=elif,=esac,=fi,=fin,=fil,=done
+setlocal indentkeys+=0=then,0=do,0=else,0=elif,0=fi,0=esac,0=done,),0=;;,0=;&
+setlocal indentkeys+=0=fin,0=fil,0=fip,0=fir,0=fix
 setlocal indentkeys-=:,0#
+setlocal nosmartindent
 
 if exists("*GetShIndent")
   finish
@@ -19,34 +21,138 @@ endif
 let s:cpo_save = &cpo
 set cpo&vim
 
-function GetShIndent()
+function s:buffer_shiftwidth()
+  return &shiftwidth
+endfunction
+
+let s:sh_indent_defaults = {
+      \ 'default': function('s:buffer_shiftwidth'),
+      \ 'continuation-line': function('s:buffer_shiftwidth'),
+      \ 'case-labels': function('s:buffer_shiftwidth'),
+      \ 'case-statements': function('s:buffer_shiftwidth'),
+      \ 'case-breaks': 0 }
+
+function! s:indent_value(option)
+  let Value = exists('b:sh_indent_options')
+            \ && has_key(b:sh_indent_options, a:option) ?
+            \ b:sh_indent_options[a:option] :
+            \ s:sh_indent_defaults[a:option]
+  if type(Value) == type(function('type'))
+    return Value()
+  endif
+  return Value
+endfunction
+
+function! GetShIndent()
   let lnum = prevnonblank(v:lnum - 1)
   if lnum == 0
     return 0
   endif
 
-  " Add a 'shiftwidth' after if, while, else, case, until, for, function()
-  " Skip if the line also contains the closure for the above
+  let pnum = prevnonblank(lnum - 1)
+
   let ind = indent(lnum)
   let line = getline(lnum)
-  if line =~ '^\s*\(if\|then\|do\|else\|elif\|case\|while\|until\|for\)\>'
-	\ || line =~ '^\s*\<\k\+\>\s*()\s*{'
-	\ || line =~ '^\s*{'
-    if line !~ '\(esac\|fi\|done\)\>\s*$' && line !~ '}\s*$'
-      let ind = ind + &sw
+  if line =~ '^\s*\%(if\|then\|do\|else\|elif\|case\|while\|until\|for\|select\)\>'
+    if line !~ '\<\%(fi\|esac\|done\)\>\s*\%(#.*\)\=$'
+      let ind += s:indent_value('default')
+    endif
+  elseif s:is_case_label(line, pnum)
+    if !s:is_case_ended(line)
+      let ind += s:indent_value('case-statements')
     endif
+  elseif line =~ '^\s*\<\k\+\>\s*()\s*{' || line =~ '^\s*{'
+    if line !~ '}\s*\%(#.*\)\=$'
+      let ind += s:indent_value('default')
+    endif
+  elseif s:is_continuation_line(line)
+    if pnum == 0 || !s:is_continuation_line(getline(pnum))
+      let ind += s:indent_value('continuation-line')
+    endif
+  elseif pnum != 0 && s:is_continuation_line(getline(pnum))
+    let ind = indent(s:find_continued_lnum(pnum))
   endif
 
-  " Subtract a 'shiftwidth' on a then, do, else, esac, fi, done
-  " Retain the indentation level if line matches fin (for find)
+  let pine = line
   let line = getline(v:lnum)
-  if (line =~ '^\s*\(then\|do\|else\|elif\|esac\|fi\|done\)\>' || line =~ '^\s*}')
-	\ && line !~ '^\s*fi[ln]\>'
-    let ind = ind - &sw
+  if line =~ '^\s*\%(then\|do\|else\|elif\|fi\|done\)\>' || line =~ '^\s*}'
+    let ind -= s:indent_value('default')
+  elseif line =~ '^\s*esac\>'
+    let ind -= (s:is_case_label(pine, lnum) && s:is_case_ended(pine) ?
+             \ 0 : s:indent_value('case-statements')) +
+             \ s:indent_value('case-labels')
+    if s:is_case_break(pine)
+      let ind += s:indent_value('case-breaks')
+    endif
+  elseif s:is_case_label(line, lnum)
+    if s:is_case(pine)
+      let ind = indent(lnum) + s:indent_value('case-labels')
+    else
+      let ind -= s:indent_value('case-statements') - s:indent_value('case-breaks')
+    endif
+  elseif s:is_case_break(line)
+    let ind -= s:indent_value('case-breaks')
   endif
 
   return ind
 endfunction
 
+function! s:is_continuation_line(line)
+  return a:line =~ '\%(\%(^\|[^\\]\)\\\|&&\|||\)$'
+endfunction
+
+function! s:find_continued_lnum(lnum)
+  let i = a:lnum
+  while i > 1 && s:is_continuation_line(getline(i - 1))
+    let i -= 1
+  endwhile
+  return i
+endfunction
+
+function! s:is_case_label(line, pnum)
+  if a:line !~ '^\s*(\=.*)'
+    return 0
+  endif
+
+  if a:pnum > 0
+    let pine = getline(a:pnum)
+    if !(s:is_case(pine) || s:is_case_ended(pine))
+      return 0
+    endif
+  endif
+
+  let suffix = substitute(a:line, '^\s*(\=', "", "")
+  let nesting = 0
+  let i = 0
+  let n = strlen(suffix)
+  while i < n
+    let c = suffix[i]
+    let i += 1
+    if c == '\\'
+      let i += 1
+    elseif c == '('
+      let nesting += 1
+    elseif c == ')'
+      if nesting == 0
+        return 1
+      endif
+      let nesting -= 1
+    endif
+  endwhile
+  return 0
+endfunction
+
+function! s:is_case(line)
+  return a:line =~ '^\s*case\>'
+endfunction
+
+function! s:is_case_break(line)
+  return a:line =~ '^\s*;[;&]'
+endfunction
+
+function! s:is_case_ended(line)
+  return s:is_case_break(a:line) || a:line =~ ';[;&]\s*\%(#.*\)\=$'
+endfunction
+
 let &cpo = s:cpo_save
 unlet s:cpo_save