Update

indent/ruby.vim

@@ -369,6 +369,13 @@ function GetRubyIndent(...)
   " 3.1. Setup {{{2
   " ----------
 
+  " The value of a single shift-width
+  if exists('*shiftwidth')
+    let sw = shiftwidth()
+  else
+    let sw = &sw
+  endif
+
   " For the current line, use the first argument if given, else v:lnum
   let clnum = a:0 ? a:1 : v:lnum
 
@@ -388,7 +395,7 @@ function GetRubyIndent(...)
     if s:Match(clnum, s:access_modifier_regex)
       let class_line = s:FindContainingClass()
       if class_line > 0
-        return indent(class_line) + &sw
+        return indent(class_line) + sw
       endif
     endif
   elseif g:ruby_indent_access_modifier_style == 'outdent'
@@ -458,7 +465,7 @@ function GetRubyIndent(...)
 
   " If the current line starts with a leading operator, add a level of indent.
   if s:Match(clnum, s:leading_operator_regex)
-    return indent(s:GetMSL(clnum)) + &sw
+    return indent(s:GetMSL(clnum)) + sw
   endif
 
   " 3.3. Work on the previous line. {{{2
@@ -485,23 +492,23 @@ function GetRubyIndent(...)
     " If the previous line was a private/protected keyword, add a
     " level of indent.
     if s:Match(lnum, s:indent_access_modifier_regex)
-      return indent(lnum) + &sw
+      return indent(lnum) + sw
     endif
   elseif g:ruby_indent_access_modifier_style == 'outdent'
     " If the previous line was a private/protected/public keyword, add
     " a level of indent, since the keyword has been out-dented.
     if s:Match(lnum, s:access_modifier_regex)
-      return indent(lnum) + &sw
+      return indent(lnum) + sw
     endif
   endif
 
   if s:Match(lnum, s:continuable_regex) && s:Match(lnum, s:continuation_regex)
-    return indent(s:GetMSL(lnum)) + &sw + &sw
+    return indent(s:GetMSL(lnum)) + sw + sw
   endif
 
   " If the previous line ended with a block opening, add a level of indent.
   if s:Match(lnum, s:block_regex)
-    return indent(s:GetMSL(lnum)) + &sw
+    return indent(s:GetMSL(lnum)) + sw
   endif
 
   " If the previous line started with a leading operator, use its MSL's level
@@ -512,7 +519,7 @@ function GetRubyIndent(...)
 
   " If the previous line ended with the "*" of a splat, add a level of indent
   if line =~ s:splat_regex
-    return indent(lnum) + &sw
+    return indent(lnum) + sw
   endif
 
   " If the previous line contained unclosed opening brackets and we are still
@@ -527,20 +534,20 @@ function GetRubyIndent(...)
     if opening.pos != -1
       if opening.type == '(' && searchpair('(', '', ')', 'bW', s:skip_expr) > 0
         if col('.') + 1 == col('$')
-          return ind + &sw
+          return ind + sw
         else
           return virtcol('.')
         endif
       else
         let nonspace = matchend(line, '\S', opening.pos + 1) - 1
-        return nonspace > 0 ? nonspace : ind + &sw
+        return nonspace > 0 ? nonspace : ind + sw
       endif
     elseif closing.pos != -1
       call cursor(lnum, closing.pos + 1)
       normal! %
 
       if s:Match(line('.'), s:ruby_indent_keywords)
-        return indent('.') + &sw
+        return indent('.') + sw
       else
         return indent('.')
       endif
@@ -569,7 +576,7 @@ function GetRubyIndent(...)
   let col = s:Match(lnum, s:ruby_indent_keywords)
   if col > 0
     call cursor(lnum, col)
-    let ind = virtcol('.') - 1 + &sw
+    let ind = virtcol('.') - 1 + sw
     " TODO: make this better (we need to count them) (or, if a searchpair
     " fails, we know that something is lacking an end and thus we indent a
     " level
@@ -606,9 +613,9 @@ function GetRubyIndent(...)
   " TODO: this does not take into account contrived things such as
   " module Foo; class Bar; end
   if s:Match(lnum, s:ruby_indent_keywords)
-    let ind = msl_ind + &sw
+    let ind = msl_ind + sw
     if s:Match(lnum, s:end_end_regex)
-      let ind = ind - &sw
+      let ind = ind - sw
     endif
     return ind
   endif
@@ -617,7 +624,7 @@ function GetRubyIndent(...)
   " closing bracket, indent one extra level.
   if s:Match(lnum, s:non_bracket_continuation_regex) && !s:Match(lnum, '^\s*\([\])}]\|end\)')
     if lnum == p_lnum
-      let ind = msl_ind + &sw
+      let ind = msl_ind + sw
     else
       let ind = msl_ind
     endif