D987: copies: add a config to limit the number of candidates to check in heuristics

[yuja (Yuya Nishihara)]

yuja added a comment.


  > I have added a debug message saying more candidates than the limit which can give user a hint in this case. Shall I make that a ui.status() thing?
  
  Perhaps.
  
  And I think the status/warning message should be displayed in a stable manner,
  which is:
  
  - do not try to find copy from the first n candidates, and show the message saying copy tracing is disabled due to too many candidates,
  - or show the message only when copy cannot be detected.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D987

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