tests/testlib/ext-phase-report.py

rust-dirstate: create dirstate submodule

This change is here to facilitate a future patch that is written in a
different file. I expect this module to grow a few different files.

Differential Revision: https://phab.mercurial-scm.org/D6389

# tiny extension to report phase changes during transaction

from __future__ import absolute_import

def reposetup(ui, repo):

    def reportphasemove(tr):
        for rev, move in sorted(tr.changes[b'phases'].items()):
            if move[0] is None:
                ui.write((b'test-debug-phase: new rev %d:  x -> %d\n'
                          % (rev, move[1])))
            else:
                ui.write((b'test-debug-phase: move rev %d: %d -> %d\n'
                          % (rev, move[0], move[1])))

    class reportphaserepo(repo.__class__):
        def transaction(self, *args, **kwargs):
            tr = super(reportphaserepo, self).transaction(*args, **kwargs)
            tr.addpostclose(b'report-phase', reportphasemove)
            return tr

    repo.__class__ = reportphaserepo