From b86026cdc078c2fd487f08cf1e74daac8f9c372f Mon Sep 17 00:00:00 2001
From: David Lee <davidomundo@gmail.com>
Date: Tue, 10 May 2011 23:34:17 -0700
Subject: [PATCH] Cache g:syntastic_sass_imports on first use

---
 syntax_checkers/sass.vim | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/syntax_checkers/sass.vim b/syntax_checkers/sass.vim
index 0e93c3eb..4eb128b3 100644
--- a/syntax_checkers/sass.vim
+++ b/syntax_checkers/sass.vim
@@ -19,13 +19,16 @@ if !executable("sass")
     finish
 endif
 
-"use compass imports if available
-let g:syntastic_sass_imports = ""
-if executable("compass")
-    let g:syntastic_sass_imports = system("compass imports")
-endif
+let g:syntastic_sass_imports = 0
 
 function! SyntaxCheckers_sass_GetLocList()
+    "use compass imports if available
+    if g:syntastic_sass_imports == 0 && executable("compass")
+        let g:syntastic_sass_imports = system("compass imports")
+    else
+        let g:syntastic_sass_imports = ""
+    endif
+
     let makeprg='sass '.g:syntastic_sass_imports.' --check '.shellescape(expand('%'))
     let errorformat = '%ESyntax %trror:%m,%C        on line %l of %f,%Z%m'
     let errorformat .= ',%Wwarning on line %l:,%Z%m,Syntax %trror on line %l: %m'