|
|
""" Mercurial phases support code
|
|
|
|
|
|
---
|
|
|
|
|
|
Copyright 2011 Pierre-Yves David <pierre-yves.david@ens-lyon.org>
|
|
|
Logilab SA <contact@logilab.fr>
|
|
|
Augie Fackler <durin42@gmail.com>
|
|
|
|
|
|
This software may be used and distributed according to the terms
|
|
|
of the GNU General Public License version 2 or any later version.
|
|
|
|
|
|
---
|
|
|
|
|
|
This module implements most phase logic in mercurial.
|
|
|
|
|
|
|
|
|
Basic Concept
|
|
|
=============
|
|
|
|
|
|
A 'changeset phase' is an indicator that tells us how a changeset is
|
|
|
manipulated and communicated. The details of each phase is described
|
|
|
below, here we describe the properties they have in common.
|
|
|
|
|
|
Like bookmarks, phases are not stored in history and thus are not
|
|
|
permanent and leave no audit trail.
|
|
|
|
|
|
First, no changeset can be in two phases at once. Phases are ordered,
|
|
|
so they can be considered from lowest to highest. The default, lowest
|
|
|
phase is 'public' - this is the normal phase of existing changesets. A
|
|
|
child changeset can not be in a lower phase than its parents.
|
|
|
|
|
|
These phases share a hierarchy of traits:
|
|
|
|
|
|
immutable shared
|
|
|
public: X X
|
|
|
draft: X
|
|
|
secret:
|
|
|
|
|
|
Local commits are draft by default.
|
|
|
|
|
|
Phase Movement and Exchange
|
|
|
===========================
|
|
|
|
|
|
Phase data is exchanged by pushkey on pull and push. Some servers have
|
|
|
a publish option set, we call such a server a "publishing server".
|
|
|
Pushing a draft changeset to a publishing server changes the phase to
|
|
|
public.
|
|
|
|
|
|
A small list of fact/rules define the exchange of phase:
|
|
|
|
|
|
* old client never changes server states
|
|
|
* pull never changes server states
|
|
|
* publish and old server changesets are seen as public by client
|
|
|
* any secret changeset seen in another repository is lowered to at
|
|
|
least draft
|
|
|
|
|
|
Here is the final table summing up the 49 possible use cases of phase
|
|
|
exchange:
|
|
|
|
|
|
server
|
|
|
old publish non-publish
|
|
|
N X N D P N D P
|
|
|
old client
|
|
|
pull
|
|
|
N - X/X - X/D X/P - X/D X/P
|
|
|
X - X/X - X/D X/P - X/D X/P
|
|
|
push
|
|
|
X X/X X/X X/P X/P X/P X/D X/D X/P
|
|
|
new client
|
|
|
pull
|
|
|
N - P/X - P/D P/P - D/D P/P
|
|
|
D - P/X - P/D P/P - D/D P/P
|
|
|
P - P/X - P/D P/P - P/D P/P
|
|
|
push
|
|
|
D P/X P/X P/P P/P P/P D/D D/D P/P
|
|
|
P P/X P/X P/P P/P P/P P/P P/P P/P
|
|
|
|
|
|
Legend:
|
|
|
|
|
|
A/B = final state on client / state on server
|
|
|
|
|
|
* N = new/not present,
|
|
|
* P = public,
|
|
|
* D = draft,
|
|
|
* X = not tracked (i.e., the old client or server has no internal
|
|
|
way of recording the phase.)
|
|
|
|
|
|
passive = only pushes
|
|
|
|
|
|
|
|
|
A cell here can be read like this:
|
|
|
|
|
|
"When a new client pushes a draft changeset (D) to a publishing
|
|
|
server where it's not present (N), it's marked public on both
|
|
|
sides (P/P)."
|
|
|
|
|
|
Note: old client behave as a publishing server with draft only content
|
|
|
- other people see it as public
|
|
|
- content is pushed as draft
|
|
|
|
|
|
"""
|
|
|
|
|
|
import errno
|
|
|
from node import nullid, nullrev, bin, hex, short
|
|
|
from i18n import _
|
|
|
import util
|
|
|
import obsolete
|
|
|
|
|
|
allphases = public, draft, secret = range(3)
|
|
|
trackedphases = allphases[1:]
|
|
|
phasenames = ['public', 'draft', 'secret']
|
|
|
|
|
|
def _filterunknown(ui, changelog, phaseroots):
|
|
|
"""remove unknown nodes from the phase boundary
|
|
|
|
|
|
Nothing is lost as unknown nodes only hold data for their descendants.
|
|
|
"""
|
|
|
updated = False
|
|
|
nodemap = changelog.nodemap # to filter unknown nodes
|
|
|
for phase, nodes in enumerate(phaseroots):
|
|
|
missing = [node for node in nodes if node not in nodemap]
|
|
|
if missing:
|
|
|
for mnode in missing:
|
|
|
ui.debug(
|
|
|
'removing unknown node %s from %i-phase boundary\n'
|
|
|
% (short(mnode), phase))
|
|
|
nodes.symmetric_difference_update(missing)
|
|
|
updated = True
|
|
|
return updated
|
|
|
|
|
|
def _readroots(repo, phasedefaults=None):
|
|
|
"""Read phase roots from disk
|
|
|
|
|
|
phasedefaults is a list of fn(repo, roots) callable, which are
|
|
|
executed if the phase roots file does not exist. When phases are
|
|
|
being initialized on an existing repository, this could be used to
|
|
|
set selected changesets phase to something else than public.
|
|
|
|
|
|
Return (roots, dirty) where dirty is true if roots differ from
|
|
|
what is being stored.
|
|
|
"""
|
|
|
dirty = False
|
|
|
roots = [set() for i in allphases]
|
|
|
try:
|
|
|
f = repo.sopener('phaseroots')
|
|
|
try:
|
|
|
for line in f:
|
|
|
phase, nh = line.split()
|
|
|
roots[int(phase)].add(bin(nh))
|
|
|
finally:
|
|
|
f.close()
|
|
|
except IOError, inst:
|
|
|
if inst.errno != errno.ENOENT:
|
|
|
raise
|
|
|
if phasedefaults:
|
|
|
for f in phasedefaults:
|
|
|
roots = f(repo, roots)
|
|
|
dirty = True
|
|
|
if _filterunknown(repo.ui, repo.changelog, roots):
|
|
|
dirty = True
|
|
|
return roots, dirty
|
|
|
|
|
|
class phasecache(object):
|
|
|
def __init__(self, repo, phasedefaults, _load=True):
|
|
|
if _load:
|
|
|
# Cheap trick to allow shallow-copy without copy module
|
|
|
self.phaseroots, self.dirty = _readroots(repo, phasedefaults)
|
|
|
self.opener = repo.sopener
|
|
|
self._phaserevs = None
|
|
|
|
|
|
def copy(self):
|
|
|
# Shallow copy meant to ensure isolation in
|
|
|
# advance/retractboundary(), nothing more.
|
|
|
ph = phasecache(None, None, _load=False)
|
|
|
ph.phaseroots = self.phaseroots[:]
|
|
|
ph.dirty = self.dirty
|
|
|
ph.opener = self.opener
|
|
|
ph._phaserevs = self._phaserevs
|
|
|
return ph
|
|
|
|
|
|
def replace(self, phcache):
|
|
|
for a in 'phaseroots dirty opener _phaserevs'.split():
|
|
|
setattr(self, a, getattr(phcache, a))
|
|
|
|
|
|
def getphaserevs(self, repo, rebuild=False):
|
|
|
if rebuild or self._phaserevs is None:
|
|
|
revs = [public] * len(repo.changelog)
|
|
|
for phase in trackedphases:
|
|
|
roots = map(repo.changelog.rev, self.phaseroots[phase])
|
|
|
if roots:
|
|
|
for rev in roots:
|
|
|
revs[rev] = phase
|
|
|
for rev in repo.changelog.descendants(roots):
|
|
|
revs[rev] = phase
|
|
|
self._phaserevs = revs
|
|
|
return self._phaserevs
|
|
|
|
|
|
def phase(self, repo, rev):
|
|
|
# We need a repo argument here to be able to build _phaserevs
|
|
|
# if necessary. The repository instance is not stored in
|
|
|
# phasecache to avoid reference cycles. The changelog instance
|
|
|
# is not stored because it is a filecache() property and can
|
|
|
# be replaced without us being notified.
|
|
|
if rev == nullrev:
|
|
|
return public
|
|
|
if self._phaserevs is None or rev >= len(self._phaserevs):
|
|
|
self._phaserevs = self.getphaserevs(repo, rebuild=True)
|
|
|
return self._phaserevs[rev]
|
|
|
|
|
|
def write(self):
|
|
|
if not self.dirty:
|
|
|
return
|
|
|
f = self.opener('phaseroots', 'w', atomictemp=True)
|
|
|
try:
|
|
|
for phase, roots in enumerate(self.phaseroots):
|
|
|
for h in roots:
|
|
|
f.write('%i %s\n' % (phase, hex(h)))
|
|
|
finally:
|
|
|
f.close()
|
|
|
self.dirty = False
|
|
|
|
|
|
def _updateroots(self, phase, newroots):
|
|
|
self.phaseroots[phase] = newroots
|
|
|
self._phaserevs = None
|
|
|
self.dirty = True
|
|
|
|
|
|
def advanceboundary(self, repo, targetphase, nodes):
|
|
|
# Be careful to preserve shallow-copied values: do not update
|
|
|
# phaseroots values, replace them.
|
|
|
|
|
|
delroots = [] # set of root deleted by this path
|
|
|
for phase in xrange(targetphase + 1, len(allphases)):
|
|
|
# filter nodes that are not in a compatible phase already
|
|
|
nodes = [n for n in nodes
|
|
|
if self.phase(repo, repo[n].rev()) >= phase]
|
|
|
if not nodes:
|
|
|
break # no roots to move anymore
|
|
|
olds = self.phaseroots[phase]
|
|
|
roots = set(ctx.node() for ctx in repo.set(
|
|
|
'roots((%ln::) - (%ln::%ln))', olds, olds, nodes))
|
|
|
if olds != roots:
|
|
|
self._updateroots(phase, roots)
|
|
|
# some roots may need to be declared for lower phases
|
|
|
delroots.extend(olds - roots)
|
|
|
# declare deleted root in the target phase
|
|
|
if targetphase != 0:
|
|
|
self.retractboundary(repo, targetphase, delroots)
|
|
|
obsolete.clearobscaches(repo)
|
|
|
|
|
|
def retractboundary(self, repo, targetphase, nodes):
|
|
|
# Be careful to preserve shallow-copied values: do not update
|
|
|
# phaseroots values, replace them.
|
|
|
|
|
|
currentroots = self.phaseroots[targetphase]
|
|
|
newroots = [n for n in nodes
|
|
|
if self.phase(repo, repo[n].rev()) < targetphase]
|
|
|
if newroots:
|
|
|
if nullid in newroots:
|
|
|
raise util.Abort(_('cannot change null revision phase'))
|
|
|
currentroots = currentroots.copy()
|
|
|
currentroots.update(newroots)
|
|
|
ctxs = repo.set('roots(%ln::)', currentroots)
|
|
|
currentroots.intersection_update(ctx.node() for ctx in ctxs)
|
|
|
self._updateroots(targetphase, currentroots)
|
|
|
obsolete.clearobscaches(repo)
|
|
|
|
|
|
def advanceboundary(repo, targetphase, nodes):
|
|
|
"""Add nodes to a phase changing other nodes phases if necessary.
|
|
|
|
|
|
This function move boundary *forward* this means that all nodes
|
|
|
are set in the target phase or kept in a *lower* phase.
|
|
|
|
|
|
Simplify boundary to contains phase roots only."""
|
|
|
phcache = repo._phasecache.copy()
|
|
|
phcache.advanceboundary(repo, targetphase, nodes)
|
|
|
repo._phasecache.replace(phcache)
|
|
|
|
|
|
def retractboundary(repo, targetphase, nodes):
|
|
|
"""Set nodes back to a phase changing other nodes phases if
|
|
|
necessary.
|
|
|
|
|
|
This function move boundary *backward* this means that all nodes
|
|
|
are set in the target phase or kept in a *higher* phase.
|
|
|
|
|
|
Simplify boundary to contains phase roots only."""
|
|
|
phcache = repo._phasecache.copy()
|
|
|
phcache.retractboundary(repo, targetphase, nodes)
|
|
|
repo._phasecache.replace(phcache)
|
|
|
|
|
|
def listphases(repo):
|
|
|
"""List phases root for serialization over pushkey"""
|
|
|
keys = {}
|
|
|
value = '%i' % draft
|
|
|
for root in repo._phasecache.phaseroots[draft]:
|
|
|
keys[hex(root)] = value
|
|
|
|
|
|
if repo.ui.configbool('phases', 'publish', True):
|
|
|
# Add an extra data to let remote know we are a publishing
|
|
|
# repo. Publishing repo can't just pretend they are old repo.
|
|
|
# When pushing to a publishing repo, the client still need to
|
|
|
# push phase boundary
|
|
|
#
|
|
|
# Push do not only push changeset. It also push phase data.
|
|
|
# New phase data may apply to common changeset which won't be
|
|
|
# push (as they are common). Here is a very simple example:
|
|
|
#
|
|
|
# 1) repo A push changeset X as draft to repo B
|
|
|
# 2) repo B make changeset X public
|
|
|
# 3) repo B push to repo A. X is not pushed but the data that
|
|
|
# X as now public should
|
|
|
#
|
|
|
# The server can't handle it on it's own as it has no idea of
|
|
|
# client phase data.
|
|
|
keys['publishing'] = 'True'
|
|
|
return keys
|
|
|
|
|
|
def pushphase(repo, nhex, oldphasestr, newphasestr):
|
|
|
"""List phases root for serialization over pushkey"""
|
|
|
lock = repo.lock()
|
|
|
try:
|
|
|
currentphase = repo[nhex].phase()
|
|
|
newphase = abs(int(newphasestr)) # let's avoid negative index surprise
|
|
|
oldphase = abs(int(oldphasestr)) # let's avoid negative index surprise
|
|
|
if currentphase == oldphase and newphase < oldphase:
|
|
|
advanceboundary(repo, newphase, [bin(nhex)])
|
|
|
return 1
|
|
|
elif currentphase == newphase:
|
|
|
# raced, but got correct result
|
|
|
return 1
|
|
|
else:
|
|
|
return 0
|
|
|
finally:
|
|
|
lock.release()
|
|
|
|
|
|
def analyzeremotephases(repo, subset, roots):
|
|
|
"""Compute phases heads and root in a subset of node from root dict
|
|
|
|
|
|
* subset is heads of the subset
|
|
|
* roots is {<nodeid> => phase} mapping. key and value are string.
|
|
|
|
|
|
Accept unknown element input
|
|
|
"""
|
|
|
# build list from dictionary
|
|
|
draftroots = []
|
|
|
nodemap = repo.changelog.nodemap # to filter unknown nodes
|
|
|
for nhex, phase in roots.iteritems():
|
|
|
if nhex == 'publishing': # ignore data related to publish option
|
|
|
continue
|
|
|
node = bin(nhex)
|
|
|
phase = int(phase)
|
|
|
if phase == 0:
|
|
|
if node != nullid:
|
|
|
repo.ui.warn(_('ignoring inconsistent public root'
|
|
|
' from remote: %s\n') % nhex)
|
|
|
elif phase == 1:
|
|
|
if node in nodemap:
|
|
|
draftroots.append(node)
|
|
|
else:
|
|
|
repo.ui.warn(_('ignoring unexpected root from remote: %i %s\n')
|
|
|
% (phase, nhex))
|
|
|
# compute heads
|
|
|
publicheads = newheads(repo, subset, draftroots)
|
|
|
return publicheads, draftroots
|
|
|
|
|
|
def newheads(repo, heads, roots):
|
|
|
"""compute new head of a subset minus another
|
|
|
|
|
|
* `heads`: define the first subset
|
|
|
* `roots`: define the second we subtract from the first"""
|
|
|
revset = repo.set('heads((%ln + parents(%ln)) - (%ln::%ln))',
|
|
|
heads, roots, roots, heads)
|
|
|
return [c.node() for c in revset]
|
|
|
|
|
|
|
|
|
def newcommitphase(ui):
|
|
|
"""helper to get the target phase of new commit
|
|
|
|
|
|
Handle all possible values for the phases.new-commit options.
|
|
|
|
|
|
"""
|
|
|
v = ui.config('phases', 'new-commit', draft)
|
|
|
try:
|
|
|
return phasenames.index(v)
|
|
|
except ValueError:
|
|
|
try:
|
|
|
return int(v)
|
|
|
except ValueError:
|
|
|
msg = _("phases.new-commit: not a valid phase name ('%s')")
|
|
|
raise error.ConfigError(msg % v)
|
|
|
|
|
|
def hassecret(repo):
|
|
|
"""utility function that check if a repo have any secret changeset."""
|
|
|
return bool(repo._phasecache.phaseroots[2])
|
|
|
|
