Implement source feature

autoload/neosnippet/parser.vim

@@ -81,7 +81,7 @@ function! s:parse(snippets_file) "{{{
     if line =~ '^#'
       " Ignore.
     elseif line =~ '^include'
-      " Include snippets.
+      " Include snippets file.
       let filename = matchstr(line, '^include\s\+\zs.*$')
 
       for snippets_file in split(globpath(join(
@@ -90,6 +90,13 @@ function! s:parse(snippets_file) "{{{
         let snippets = extend(snippets,
               \ neosnippet#parser#_parse_snippets(snippets_file))
       endfor
+    elseif line =~ '^source'
+      " Source Vim script file.
+      for file in split(globpath(join(
+            \ neosnippet#helpers#get_snippets_directory(), ','),
+            \ matchstr(line, '^source\s\+\zs.*$')), '\n')
+        execute 'source' fnameescape(file)
+      endfor
     elseif line =~ '^delete\s'
       let name = matchstr(line, '^delete\s\+\zs.*$')
       if name != '' && has_key(snippets, name)

doc/neosnippet.txt

@@ -726,7 +726,12 @@ insert empty line in snippet end, you must insert placeholder.
 	  #!/usr/bin/env ruby
 
 
+You can load a Vim script file for snippets.
+
+>
+	source go.vim
 <
+
 ==============================================================================
 UNITE SOURCES					*neosnippet-unite-sources*
 

syntax/neosnippet.vim

@@ -52,7 +52,7 @@ syntax match   neosnippetEscape
       \ '\\[`]' contained
 
 syntax match   neosnippetKeyword
-      \ '^\%(include\|snippet\|abbr\|prev_word\|delete\|alias\|options\|regexp\|TARGET\)' contained
+      \ '^\%(include\|source\|snippet\|abbr\|prev_word\|delete\|alias\|options\|regexp\|TARGET\)' contained
 syntax keyword   neosnippetOption
       \ head word indent contained
 syntax match   neosnippetPrevWords
@@ -75,6 +75,10 @@ syntax match   neosnippetStatementInclude
       \ '^include\s.*$' contains=neosnippetInclude,neosnippetKeyword
 syntax match   neosnippetInclude
       \ '\s\+.*$' contained
+syntax match   neosnippetStatementSource
+      \ '^source\s.*$' contains=neosnippetSource,neosnippetKeyword
+syntax match   neosnippetSource
+      \ '\s\+.*$' contained
 syntax match   neosnippetStatementDelete
       \ '^delete\s.*$' contains=neosnippetDelete,neosnippetKeyword
 syntax match   neosnippetDelete
@@ -99,6 +103,7 @@ highlight def link neosnippetPlaceHolderComment Comment
 highlight def link neosnippetVariable Special
 highlight def link neosnippetComment Comment
 highlight def link neosnippetInclude PreProc
+highlight def link neosnippetSource PreProc
 highlight def link neosnippetDelete PreProc
 highlight def link neosnippetOption PreProc
 highlight def link neosnippetAlias Identifier