pulkit created this revision.
Herald added a reviewer: hg-reviewers.
Herald added a subscriber: mercurial-patches.

REVISION SUMMARY
  For compression format variant, the result of `fromrepo()` and `fromconfig()` 
is
  not a boolean and we have to actually equate those to find change.

REPOSITORY
  rHG Mercurial

BRANCH
  default

REVISION DETAIL
  https://phab.mercurial-scm.org/D9693

AFFECTED FILES
  mercurial/upgrade_utils/actions.py

CHANGE DETAILS

diff --git a/mercurial/upgrade_utils/actions.py 
b/mercurial/upgrade_utils/actions.py
--- a/mercurial/upgrade_utils/actions.py
+++ b/mercurial/upgrade_utils/actions.py
@@ -467,6 +467,12 @@
     downgrades = []
 
     for fv in allformatvariant:
+        if fv.name == b'compression':
+            # If there is a compression change between repository
+            # and config, destination repository compression will change
+            # and current compression will be removed.
+            if fv.fromrepo(repo) != fv.fromconfig(repo):
+                downgrades.append(fv)
         # format variant exist in repo but does not exist in new repository
         # config
         if fv.fromrepo(repo) and not fv.fromconfig(repo):



To: pulkit, #hg-reviewers
Cc: mercurial-patches, mercurial-devel
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