[PATCH 4 of 4 evolve-ext] evolve: add new variable and comment

[Laurent Charignon]

# HG changeset patch
# User Laurent Charignon <lcharignon at fb.com>
# Date 1430783765 25200
#      Mon May 04 16:56:05 2015 -0700
# Node ID 8376fe35ebdacf0368509fedef2a9fb97770ddc9
# Parent  29363f79514fc2f2deeb2c91099412aaf49a5d82
evolve: add new variable and comment

Add comment and introduce a new variable to keep track of if the progress ui
is shown. Later on we will use this variable in the implementation of the --rev
option.

diff --git a/hgext/evolve.py b/hgext/evolve.py
--- a/hgext/evolve.py
+++ b/hgext/evolve.py
@@ -1246,11 +1246,13 @@
     # Progress handling
     seen = 1
     count = allopt and _counttroubled(ui, repo) or 1
+    showprogress = allopt
 
     def progresscb():
         if allopt:
             ui.progress('evolve', seen, unit='changesets', total=count)
 
+    # Continuation handling
     if contopt:
         if anyopt:
             raise util.Abort('cannot specify both "--any" and "--continue"')
@@ -1286,7 +1288,8 @@
         progresscb()
         nexttrouble = _picknexttroubled(ui, repo, anyopt or allopt)
 
-    if allopt:
+    # Cleanup
+    if showprogress:
         ui.progress('evolve', None)
 
     if repo['.'] != startnode: