Add elixir language support

indent/elixir.vim

@@ -0,0 +1,61 @@
+" Vim indent file
+" Language: Elixir
+" Maintainer: Carlos Galdino <carloshsgaldino@gmail.com>
+" Last Change: 2013 Apr 24
+
+if exists("b:did_indent")
+  finish
+endif
+let b:did_indent = 1
+
+setlocal nosmartindent
+
+setlocal indentexpr=GetElixirIndent(v:lnum)
+setlocal indentkeys+==end,=else:,=match:,=elsif:,=catch:,=after:,=rescue:
+
+if exists("*GetElixirIndent")
+  finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+let s:skip_syntax  = '\%(Comment\|String\)$'
+let s:block_skip   = "synIDattr(synID(line('.'),col('.'),1),'name') =~? '" . s:skip_syntax . "'"
+let s:block_start  = 'do\|fn'
+let s:block_middle = 'else\|match\|elsif\|catch\|after\|rescue'
+let s:block_end    = 'end'
+
+let s:indent_keywords   = '\<\%(' . s:block_start . '\|' . s:block_middle . '\)$'
+let s:deindent_keywords = '^\s*\<\%(' . s:block_end . '\|' . s:block_middle . '\)\>'
+
+function! GetElixirIndent(...)
+  let lnum = prevnonblank(v:lnum - 1)
+  let ind  = indent(lnum)
+
+  " At the start of the file use zero indent.
+  if lnum == 0
+    return 0
+  endif
+
+  if synIDattr(synID(v:lnum, 1, 1), "name") !~ '\(Comment\|String\)$'
+    if getline(lnum) =~ s:indent_keywords .
+          \ '\|^\s*\%(^.*[\[{(].*[,:]\|.*->\)$'
+      let ind += &sw
+    endif
+
+    if getline(v:lnum) =~ s:deindent_keywords
+      let bslnum = searchpair( '\<\%(' . s:block_start . '\):\@!\>',
+            \ '\<\%(' . s:block_middle . '\):\@!\>\zs',
+            \ '\<:\@<!' . s:block_end . '\>\zs',
+            \ 'nbW',
+            \ s:block_skip )
+      let ind = indent(bslnum)
+    endif
+  endif
+
+  return ind
+endfunction
+
+let &cpo = s:cpo_save
+unlet s:cpo_save