From f34fea0eff09d0fb4ec54aec3c07345e6c4486d9 Mon Sep 17 00:00:00 2001
From: Paolo Cretaro <paolocretaro@gmail.com>
Date: Fri, 5 Apr 2019 11:11:49 +0200
Subject: [PATCH] CVS: handle case where diff is valid but empty (#294)

CVS diff return code is 1 when the file differs from HEAD revision or
when there is an error (e.g. file is not under revision control),
while it is 0 (with an empty output) when the file is up-to-date.
The latter case was not handled, causing vim-signify to not recognize a
file under CVS when it did not have any change.
---
 autoload/sy/repo.vim | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/autoload/sy/repo.vim b/autoload/sy/repo.vim
index 88328c3..64bf07a 100644
--- a/autoload/sy/repo.vim
+++ b/autoload/sy/repo.vim
@@ -191,6 +191,8 @@ function! sy#repo#get_diff_cvs(sy, exitval, diff) abort
         break
       endif
     endfor
+  elseif a:exitval == 0 && len(a:diff) == 0
+    let found_diff = 1
   endif
   call s:get_diff_end(a:sy, found_diff, 'cvs', diff)
 endfunction