view tests/test-revlog-group-emptyiter.t @ 34940:c2b30348930f stable

dirstate: clean up when restoring identical backups

When a dirstate backup is restored, it is possible that no actual changes to
the dirstate have been made.  In this case, the backup is still a hardlink
to the original dirstate.

Unfortunately, `os.rename` silently fails (nothing happens, and no error
occurs) when `src` and `dst` are hardlinks to the same file.  As a result,
the backup is left lying around.  Over time, these files accumulate.

When restoring dirstate backups, check if the backup and the dirstate are
the same file, and if so, just delete the backup.

Differential Revision: https://phab.mercurial-scm.org/D1201

Issue1678: IndexError when pushing

setting up base repo
  $ hg init a
  $ cd a
  $ touch a
  $ hg ci -Am a
  adding a
  $ cd ..

cloning base repo
  $ hg clone a b
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd b

setting up cset to push
  $ hg up null
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ touch a
different msg so we get a clog new entry
  $ hg ci -Am b
  adding a
  created new head

pushing
  $ hg push -f ../a
  pushing to ../a
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 0 files (+1 heads)

  $ cd ..