comparison mercurial/scmutil.py @ 39899:f9232b0310ef

pullreport: issue a message about "extinct" pulled changesets

Changeset pulled from a remote repository while already obsolete locally can
end up hidden after the pull. Hiding obsolete changesets is a good behavior
but silently "skipping" some of the pulled content can get confusing.

We now detect this situation and emit a message about it. The message is
simple and the wording could be improved, however, we focus on the detection
here. Evolution is still an experimental feature, so the output is open to
changes.

In particular, we could point out at the latest successors of the obsolete
changesets, however, it can get tricky is there are many of them. So we delay
these improvements to another adventure.

Another easy improvement would be to merge this message with the previous line
about the new nodes and their phases.

This is a good example of cases where we can only transmit a limited amount of
data to users by default. We need some sort of "transaction journal" we could
point the user to.

39898:b5e12039e6e0

                else:
                    errormsg = 'entered unreachable condition'
                    raise error.ProgrammingError(errormsg)
                repo.ui.status(msg)

        @reportsummary
        def reportphasechanges(repo, tr):
            """Report statistics of phase changes for changesets pre-existing
            pull/unbundle.
            """

39899:f9232b0310ef

                else:
                    errormsg = 'entered unreachable condition'
                    raise error.ProgrammingError(errormsg)
                repo.ui.status(msg)

            # search new changesets directly pulled as obsolete
            obsadded = unfi.revs('%d: and obsolete()', origrepolen)
            cl = repo.changelog
            extinctadded = [r for r in obsadded if r not in cl]
            if extinctadded:
                # They are not just obsolete, but obsolete and invisible
                # we call them "extinct" internally but the terms have not been
                # exposed to users.
                msg = '(%d other changesets obsolete on arrival)\n'
                repo.ui.status(msg % len(extinctadded))

        @reportsummary
        def reportphasechanges(repo, tr):
            """Report statistics of phase changes for changesets pre-existing
            pull/unbundle.
            """