Refactoring

autoload/sy/fold.vim

@@ -42,10 +42,7 @@ endfunction
 
 " Function: #enable {{{1
 function! sy#fold#enable(do_tab) abort
-  if !exists('b:sy')
-    echomsg 'signify: I cannot detect any changes!'
-    return
-  endif
+  execute sy#util#return_if_no_changes()
 
   if a:do_tab
     tabedit %

autoload/sy/jump.vim

@@ -4,10 +4,7 @@ scriptencoding utf-8
 
 " Function: #next_hunk {{{1
 function! sy#jump#next_hunk(count)
-  if !exists('b:sy')
-    echomsg 'signify: I cannot detect any changes!'
-    return
-  endif
+  execute sy#util#return_if_no_changes()
 
   let lnum = line('.')
   let hunks = filter(copy(b:sy.hunks), 'v:val.start > lnum')
@@ -20,10 +17,7 @@ endfunction
 
 " Function: #prev_hunk {{{1
 function! sy#jump#prev_hunk(count)
-  if !exists('b:sy')
-    echomsg 'signify: I cannot detect any changes!'
-    return
-  endif
+  execute sy#util#return_if_no_changes()
 
   let lnum = line('.')
   let hunks = filter(copy(b:sy.hunks), 'v:val.start < lnum')

autoload/sy/repo.vim

@@ -210,11 +210,7 @@ endfunction
 
 " Function: #get_stats {{{1
 function! sy#repo#get_stats() abort
-  if !exists('b:sy') || !has_key(b:sy, 'stats')
-    return [-1, -1, -1]
-  endif
-
-  return b:sy.stats
+  return exists('b:sy') ? b:sy.stats : [-1, -1, -1]
 endfunction
 
 " Function: #debug_detection {{{1
@@ -245,10 +241,8 @@ endfunction
 
 " Function: #diffmode {{{1
 function! sy#repo#diffmode() abort
-  if !exists('b:sy')
-    echomsg 'signify: I cannot detect any changes!'
-    return
-  endif
+  execute sy#util#return_if_no_changes()
+
   let vcs = b:sy.updated_by
   if !has_key(g:signify_vcs_cmds_diffmode, vcs)
     echomsg 'SignifyDiff has no support for: '. vcs

autoload/sy/util.vim

@@ -43,14 +43,13 @@ endfunction
 
 " Function: #hunk_text_object {{{1
 function! sy#util#hunk_text_object(emptylines) abort
-  if !exists('b:sy')
-    return
-  endif
+  execute sy#util#return_if_no_changes()
 
   let lnum  = line('.')
   let hunks = filter(copy(b:sy.hunks), 'v:val.start <= lnum && v:val.end >= lnum')
 
   if empty(hunks)
+    echomsg 'signify: Here is no hunk.'
     return
   endif
 
@@ -89,3 +88,12 @@ function! sy#util#chdir() abort
         \ : (exists(':tcd') && haslocaldir(-1, 0)) ? 'tcd' : 'cd'
   return [getcwd(), chdir]
 endfunction
+
+" Function: #has_changes {{{1
+function! sy#util#return_if_no_changes() abort
+  if !exists('b:sy') || empty(b:sy.hunks)
+    echomsg 'signify: There are no changes.'
+    return 'return'
+  endif
+  return ''
+endfunction