# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1511452409 -3600
# Node ID 0d2c095aeb2a76da81449fe615ed4edf1b9c1615
# Parent  9361149224a766edf1e8c1917041e4b6e3face1d
depthcache: issue a progress bar when loading the depth cache

The operation can be in the minute order of magnitude of some larger repository.
We better keep the user entertain when he wait.

diff -r 9361149224a7 -r 0d2c095aeb2a hgext3rd/evolve/depthcache.py
--- a/hgext3rd/evolve/depthcache.py	Wed Nov 22 15:05:15 2017 +0100
+++ b/hgext3rd/evolve/depthcache.py	Thu Nov 23 16:53:29 2017 +0100
@@ -129,9 +129,18 @@
         """compute the rev of one revision, assert previous revision has an hot cache
         """
         cl = repo.unfiltered().changelog
-        for rev in data:
+        total = len(data)
+
+        def progress(pos, rev):
+            repo.ui.progress('updating depth cache',
+                             pos, 'rev %s' % rev, unit='revision', total=total)
+        progress(0, '')
+        for idx, rev in enumerate(data, 1):
             assert rev == len(self._data), (rev, len(self._data))
             self._data.append(self._depth(cl, rev))
+            if not (idx % 10000): # progress as a too high performance impact
+                progress(idx, rev)
+        progress(None, '')
 
     def _depth(self, changelog, rev):
         cl = changelog