From 2e1fd546012d485296fb5090dfa7d64b07de7f09 Mon Sep 17 00:00:00 2001
From: Marco Hinz <mh.codebro@gmail.com>
Date: Sun, 24 May 2015 10:52:28 +0200
Subject: [PATCH] Make :SignifyDebugDiff more robust and add it to help

---
 autoload/sy/debug.vim | 6 ++++--
 doc/signify.txt       | 7 +++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/autoload/sy/debug.vim b/autoload/sy/debug.vim
index 3443d8d..3227b15 100644
--- a/autoload/sy/debug.vim
+++ b/autoload/sy/debug.vim
@@ -49,11 +49,11 @@ endfunction
 
 " Function #verbose_diff_cmd {{{1
 function! sy#debug#verbose_diff_cmd() abort
-  if exists('b:sy_info')
+  if exists('b:sy') && b:sy.type != 'unknown'
+    let output = sy#repo#get_diff_{b:sy.type}()[1]
     echohl Statement
     echo 'Command: '. b:sy_info.cmd
     echohl NONE
-    let output = sy#repo#get_diff_{b:sy.type}()[1]
     if empty(output)
       echo 'Output: []'
     else
@@ -70,5 +70,7 @@ function! sy#debug#verbose_diff_cmd() abort
         echohl NONE
       endfor
     endif
+  else
+    echo 'signify: I cannot detect any changes!'
   endif
 endfunction
diff --git a/doc/signify.txt b/doc/signify.txt
index 0cb8196..6564d20 100644
--- a/doc/signify.txt
+++ b/doc/signify.txt
@@ -308,6 +308,13 @@ Refresh signs in all windows.
 <
 Outputs debug info for all managed buffers.
 
+------------------------------------------------------------------------------
+                                                     *signify-:SignifyDebugDiff*
+>
+    :SignifyDebugDiff
+<
+Print the diff command for the current buffer and its output.
+
 ==============================================================================
 MAPPINGS                                                      *signify-mappings*