D6752: copies: remove existing copy info from the changeset on amend (BC)

martinvonz (Martin von Zweigbergk) phabricator at mercurial-scm.org
Tue Aug 20 12:29:30 EDT 2019

martinvonz created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.

  When amending a changeset with copy information in the changeset and
  the new changeset doesn't have any copy information (or similar for
  "filesadded" and "filesremoved"), we shouldn't keep it.
  A drawback of this is that we now unconditionally remove these four
  entries from the extras, breaking any extensions that happened to
  write entries with the same names (which seems very unlikely).
  I think I'd heard that there was list of blacklisted keys that would
  be removed from the extras when a commit is rewritten, but I couldn't
  find that. It would make sense to add the keys mentioned above there
  instead of the custom filtering I've added in this patch.

  rHG Mercurial




diff --git a/tests/test-copies-in-changeset.t b/tests/test-copies-in-changeset.t
--- a/tests/test-copies-in-changeset.t
+++ b/tests/test-copies-in-changeset.t
@@ -140,11 +140,7 @@
   saved backup bundle to $TESTTMP/repo/.hg/strip-backup/dd7bb9581359-a6e6b6d2-amend.hg
   $ hg changesetcopies
   files: j
-  filesadded: 0
-  filesremoved: 
-  p1copies: 0\x00a (esc)
-  p2copies: 
   $ hg showcopies --config experimental.copies.read-from=filelog-only
   a -> j
 The entries should be written to extras even if they're empty (so the client
diff --git a/mercurial/changelog.py b/mercurial/changelog.py
--- a/mercurial/changelog.py
+++ b/mercurial/changelog.py
@@ -637,6 +637,9 @@
         if extra is None and any(x is not None for x in extrasentries):
             extra = {}
         sortedfiles = sorted(files)
+        if extra is not None:
+            for name in ('p1copies', 'p2copies', 'filesadded', 'filesremoved'):
+                extra.pop(name, None)
         if p1copies is not None:
             extra['p1copies'] = encodecopies(sortedfiles, p1copies)
         if p2copies is not None:

To: martinvonz, #hg-reviewers
Cc: mercurial-devel

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