evolve: use `first` and `last` on revset
this match change in mercurial core.
G: changed hgext/evolve.py
"""Small extension altering some push behavior
- Add a new wire protocol command to exchange obsolescence markers. Sending the
raw file as a binary instead of using pushkey hack.
- Add a "push done" notification
- Push obsolescence marker before anything else (This works around the lack of global transaction)
"""
import errno
from StringIO import StringIO
from mercurial.i18n import _
from mercurial import extensions
from mercurial import wireproto
from mercurial import obsolete
from mercurial import localrepo
def client_pushobsmarkers(self, obsfile):
"""wireprotocol peer method"""
self.requirecap('_push_experiment_pushobsmarkers_0',
_('push obsolete markers faster'))
ret, output = self._callpush('push_experiment_pushobsmarkers_0', obsfile)
for l in output.splitlines(True):
self.ui.status(_('remote: '), l)
return ret
def srv_pushobsmarkers(repo, proto):
"""wireprotocol command"""
fp = StringIO()
proto.redirect()
proto.getfile(fp)
data = fp.getvalue()
fp.close()
lock = repo.lock()
try:
tr = repo.transaction('pushkey: obsolete markers')
try:
repo.obsstore.mergemarkers(tr, data)
tr.close()
finally:
tr.release()
finally:
lock.release()
return wireproto.pushres(0)
def syncpush(orig, repo, remote):
"""wraper for obsolete.syncpush to use the fast way if possible"""
if not (obsolete._enabled and repo.obsstore):
return
if remote.capable('_push_experiment_pushobsmarkers_0'):
return # already pushed before changeset
remote.push_experiment_pushobsmarkers_0(obsfp)
return
return orig(repo, remote)
def client_notifypushend(self):
"""wire peer command to notify a push is done"""
self.requirecap('_push_experiment_notifypushend_0', _('hook once push is all done'))
return self._call('push_experiment_notifypushend_0')
def srv_notifypushend(repo, proto):
"""wire protocol command to notify a push is done"""
proto.redirect()
repo.hook('notifypushend')
return wireproto.pushres(0)
def augmented_push(orig, repo, remote, *args, **kwargs):
"""push wrapped that call the wire protocol command"""
if not remote.canpush():
raise util.Abort(_("destination does not support push"))
if (obsolete._enabled and repo.obsstore
and remote.capable('_push_experiment_pushobsmarkers_0')):
# push marker early to limit damage of pushing too early.
try:
obsfp = repo.sopener('obsstore')
except IOError as e:
if e.errno != errno.ENOENT:
raise
else:
remote.push_experiment_pushobsmarkers_0(obsfp)
ret = orig(repo, remote, *args, **kwargs)
if remote.capable('_push_experiment_notifypushend_0'):
remote.push_experiment_notifypushend_0()
return ret
def capabilities(orig, repo, proto):
"""wrapper to advertise new capability"""
caps = orig(repo, proto)
if obsolete._enabled:
caps += ' _push_experiment_pushobsmarkers_0'
caps += ' _push_experiment_notifypushend_0'
return caps
def extsetup(ui):
wireproto.wirepeer.push_experiment_pushobsmarkers_0 = client_pushobsmarkers
wireproto.wirepeer.push_experiment_notifypushend_0 = client_notifypushend
wireproto.commands['push_experiment_pushobsmarkers_0'] = (srv_pushobsmarkers, '')
wireproto.commands['push_experiment_notifypushend_0'] = (srv_notifypushend, '')
extensions.wrapfunction(wireproto, 'capabilities', capabilities)
extensions.wrapfunction(obsolete, 'syncpush', syncpush)
extensions.wrapfunction(localrepo.localrepository, 'push', augmented_push)