From 0bf6afa72ca190d7378752944ef901f8b84cea6f Mon Sep 17 00:00:00 2001
From: Oleg Broytman <phd@phdru.name>
Date: Mon, 26 Mar 2018 06:59:48 +0300
Subject: [PATCH] .vimrc: Check chmod just once

---
 .vimrc | 39 +++++++++++++++++++--------------------
 1 file changed, 19 insertions(+), 20 deletions(-)

diff --git a/.vimrc b/.vimrc
index f592934..bb97edb 100644
--- a/.vimrc
+++ b/.vimrc
@@ -586,26 +586,25 @@ endif
 " From Tip 212:
 " http://vim.wikia.com/wiki/Setting_file_attributes_without_reloading_a_buffer
 
-function! SetExecutableBit(x)
-   if !executable('chmod')
-      return
-   endif
-   checktime
-   let fname = expand("%:p")
-   let fx = executable(fname)
-   execute "au FileChangedShell " . fname . " :echo"
-   if a:x && !fx
-      !chmod a+x %
-   elseif !a:x && fx
-      !chmod a-x %
-   endif
-   if v:shell_error
-      echoerr 'Error running chmod: ' . v:shell_error
-   endif
-   checktime
-   execute "au! FileChangedShell " . fname
-endfunction
-command! Xbit if executable(expand("%:p")) | call SetExecutableBit(0) | else | call SetExecutableBit(1) | endif
+if executable('chmod')
+   function! SetExecutableBit(x)
+      checktime
+      let fname = expand("%:p")
+      let fx = executable(fname)
+      execute "au FileChangedShell " . fname . " :echo"
+      if a:x && !fx
+         !chmod a+x %
+      elseif !a:x && fx
+         !chmod a-x %
+      endif
+      if v:shell_error
+         echoerr 'Error running chmod: ' . v:shell_error
+      endif
+      checktime
+      execute "au! FileChangedShell " . fname
+   endfunction
+   command! Xbit if executable(expand("%:p")) | call SetExecutableBit(0) | else | call SetExecutableBit(1) | endif
+endif
 
 
 " ----------
-- 
2.39.5