added pyang.vim to syntax checkers

plugin/syntastic/registry.vim

@@ -102,6 +102,7 @@ let s:_DEFAULT_CHECKERS = {
         \ 'xquery':        ['basex'],
         \ 'yacc':          ['bison'],
         \ 'yaml':          ['jsyaml'],
+        \ 'yang':          ['pyang'],
         \ 'z80':           ['z80syntaxchecker'],
         \ 'zpt':           ['zptlint'],
         \ 'zsh':           ['zsh'],

syntax_checkers/yang/pyang.vim

@@ -0,0 +1,36 @@
+"============================================================================
+"File:        pyang.vim
+"Description: Syntax checking plugin for syntastic.vim
+"Authors:     joshua.downer@gmail.com
+"
+"============================================================================
+
+if exists('g:loaded_syntastic_yang_pyang_checker')
+    finish
+endif
+let g:loaded_syntastic_yang_pyang_checker = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_yang_pyang_GetLocList() dict
+    let makeprg = self.makeprgBuild({})
+
+    let errorformat = '%f:%l:%m'
+
+    return SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat,
+        \ 'postprocess': ['filterForeignErrors'] })
+endfunction
+
+runtime! syntax_checkers/yang/pyang.vim
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'yang',
+    \ 'name': 'pyang'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim: set sw=4 sts=4 et fdm=marker: