D6275: copies: delete a redundant cleanup step in _chain()

[martinvonz (Martin von Zweigbergk)]

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

REVISION SUMMARY
  The check is redundant since https://phab.mercurial-scm.org/rHGd5edb5d3a337b85f56c3efc448482af87c9df3c2 (copies: filter out copies
  when target is not in destination manifest, 2019-02-14). To test that
  hypothesis, I made this change in the commit that commit, but all
  tests still passed. I think the case was necessary before then, we
  just didn't have tests for it.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D6275

AFFECTED FILES
  mercurial/copies.py

CHANGE DETAILS

diff --git a/mercurial/copies.py b/mercurial/copies.py
--- a/mercurial/copies.py
+++ b/mercurial/copies.py
@@ -134,10 +134,6 @@
             if t[v] != k:
                 # file wasn't renamed back to itself (i.e. case 4, not 3)
                 t[k] = t[v]
-            if v not in dst:
-                # chain was a rename, not a copy
-                # this deletes the copy for 'b' in case 4
-                del t[v]
         if v in src:
             # file is a copy of an existing file, i.e. case 6.
             t[k] = v



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