view tests/bruterebase.py @ 47872:cdad6560e832

wireprotov1peer: simplify the way batchable rpcs are defined

The scheme with futures/generator is confusing due to the way
communication is done by side effects, especially with two different
"future" objects. Just returning a request and a function to read the
response is easier to understand.

There are tests failures with the largefiles extension due to it
aliasing one rpc to another one, which gets fixed in the next commit.

Differential Revision: https://phab.mercurial-scm.org/D11211

# bruterebase.py - brute force rebase testing
#
# Copyright 2017 Facebook, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

from mercurial import (
    error,
    registrar,
    revsetlang,
)

from hgext import rebase

try:
    xrange
except NameError:
    xrange = range

cmdtable = {}
command = registrar.command(cmdtable)


@command(b'debugbruterebase')
def debugbruterebase(ui, repo, source, dest):
    """for every non-empty subset of source, run rebase -r subset -d dest

    Print one line summary for each subset. Assume obsstore is enabled.
    """
    srevs = list(repo.revs(source))

    with repo.wlock(), repo.lock():
        repolen = len(repo)
        cl = repo.changelog

        def getdesc(rev):
            result = cl.changelogrevision(rev).description
            if rev >= repolen:
                result += b"'"
            return result

        for i in xrange(1, 2 ** len(srevs)):
            subset = [rev for j, rev in enumerate(srevs) if i & (1 << j) != 0]
            spec = revsetlang.formatspec(b'%ld', subset)
            tr = repo.transaction(b'rebase')
            tr._report = lambda x: 0  # hide "transaction abort"

            with ui.silent():
                try:
                    rebase.rebase(ui, repo, dest=dest, rev=[spec])
                except error.Abort as ex:
                    summary = b'ABORT: %s' % ex.message
                except Exception as ex:
                    summary = b'CRASH: %s' % ex
                else:
                    # short summary about new nodes
                    cl = repo.changelog
                    descs = []
                    for rev in xrange(repolen, len(repo)):
                        desc = b'%s:' % getdesc(rev)
                        for prev in cl.parentrevs(rev):
                            if prev > -1:
                                desc += getdesc(prev)
                        descs.append(desc)
                    descs.sort()
                    summary = b' '.join(descs)
            repo.vfs.tryunlink(b'rebasestate')

            subsetdesc = b''.join(getdesc(rev) for rev in subset)
            ui.write(b'%s: %s\n' % (subsetdesc.rjust(len(srevs)), summary))
            tr.abort()