upstream/mercurial-mirror Files · tests/testlib/ext-phase-report.py

persistent-nodemap: introduce a test to highlight possible race...

persistent-nodemap: introduce a test to highlight possible race Weakness in the current file caching of the changelog means that a writer can end up using an outdated docket. This might result in "committed" persistent-nodemap data from a previous writer to be overwritten by a later writer. This break the strong "append only" assumption of the persistent nodemap and can result in confused reader. The race windows are quite narrow. See the test documentation for details. The issues is fixed in the next changeset. Differential Revision: https://phab.mercurial-scm.org/D11481

Joerg Sonnenberger - - Load All Authors

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      # tiny extension to report phase changes during transaction

      from __future__ import absolute_import

      def reposetup(ui, repo):

          def reportphasemove(tr):

              for revs, move in sorted(tr.changes[b"phases"], key=lambda r: r[0][0]):

                  for rev in revs:

                      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

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				# tiny extension to report phase changes during transaction

				from __future__ import absolute_import


				def reposetup(ui, repo):
				def reportphasemove(tr):
				for revs, move in sorted(tr.changes[b"phases"], key=lambda r: r[0][0]):
				for rev in revs:
				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