|
|
""" 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 phases' 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 are exchanged by pushkey on pull and push. Some server have a
|
|
|
publish option set, we call them publishing server. Pushing to such server make
|
|
|
draft changeset publish.
|
|
|
|
|
|
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 csets are seen as public by client
|
|
|
|
|
|
* Any secret changeset seens in another repository is lowered to at least draft
|
|
|
|
|
|
|
|
|
Here is the final table summing up the 49 possible usecase 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 (ie: 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 publish server with Draft only content
|
|
|
- other people see it as public
|
|
|
- content is pushed as draft
|
|
|
|
|
|
"""
|
|
|
|
|
|
import errno
|
|
|
from node import nullid, bin, hex, short
|
|
|
from i18n import _
|
|
|
|
|
|
allphases = public, draft, secret = range(3)
|
|
|
trackedphases = allphases[1:]
|
|
|
phasenames = ['public', 'draft', 'secret']
|
|
|
|
|
|
def readroots(repo):
|
|
|
"""Read phase roots from disk"""
|
|
|
roots = [set() for i in allphases]
|
|
|
roots[0].add(nullid)
|
|
|
try:
|
|
|
f = repo.sopener('phaseroots')
|
|
|
try:
|
|
|
for line in f:
|
|
|
phase, nh = line.strip().split()
|
|
|
roots[int(phase)].add(bin(nh))
|
|
|
finally:
|
|
|
f.close()
|
|
|
except IOError, inst:
|
|
|
if inst.errno != errno.ENOENT:
|
|
|
raise
|
|
|
return roots
|
|
|
|
|
|
def writeroots(repo):
|
|
|
"""Write phase roots from disk"""
|
|
|
f = repo.sopener('phaseroots', 'w', atomictemp=True)
|
|
|
try:
|
|
|
for phase, roots in enumerate(repo._phaseroots):
|
|
|
for h in roots:
|
|
|
f.write('%i %s\n' % (phase, hex(h)))
|
|
|
repo._dirtyphases = False
|
|
|
finally:
|
|
|
f.close()
|
|
|
|
|
|
def filterunknown(repo, phaseroots=None):
|
|
|
"""remove unknown nodes from the phase boundary
|
|
|
|
|
|
no data is lost as unknown node only old data for their descentants
|
|
|
"""
|
|
|
if phaseroots is None:
|
|
|
phaseroots = repo._phaseroots
|
|
|
nodemap = repo.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:
|
|
|
msg = _('Removing unknown node %(n)s from %(p)i-phase boundary')
|
|
|
repo.ui.debug(msg, {'n': short(mnode), 'p': phase})
|
|
|
nodes.symmetric_difference_update(missing)
|
|
|
repo._dirtyphases = True
|
|
|
|
|
|
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."""
|
|
|
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
|
|
|
# XXX rev phase cache might have been invalidated by a previous loop
|
|
|
# XXX we need to be smarter here
|
|
|
nodes = [n for n in nodes if repo[n].phase() >= phase]
|
|
|
if not nodes:
|
|
|
break # no roots to move anymore
|
|
|
roots = repo._phaseroots[phase]
|
|
|
olds = roots.copy()
|
|
|
ctxs = list(repo.set('roots((%ln::) - (%ln::%ln))', olds, olds, nodes))
|
|
|
roots.clear()
|
|
|
roots.update(ctx.node() for ctx in ctxs)
|
|
|
if olds != roots:
|
|
|
# invalidate cache (we probably could be smarter here
|
|
|
if '_phaserev' in vars(repo):
|
|
|
del repo._phaserev
|
|
|
repo._dirtyphases = True
|
|
|
# some roots may need to be declared for lower phases
|
|
|
delroots.extend(olds - roots)
|
|
|
# declare deleted root in the target phase
|
|
|
if targetphase != 0:
|
|
|
retractboundary(repo, targetphase, delroots)
|
|
|
|
|
|
|
|
|
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."""
|
|
|
currentroots = repo._phaseroots[targetphase]
|
|
|
newroots = [n for n in nodes if repo[n].phase() < targetphase]
|
|
|
if newroots:
|
|
|
currentroots.update(newroots)
|
|
|
ctxs = repo.set('roots(%ln::)', currentroots)
|
|
|
currentroots.intersection_update(ctx.node() for ctx in ctxs)
|
|
|
if '_phaserev' in vars(repo):
|
|
|
del repo._phaserev
|
|
|
repo._dirtyphases = True
|
|
|
|
|
|
|
|
|
def listphases(repo):
|
|
|
"""List phases root for serialisation over pushkey"""
|
|
|
keys = {}
|
|
|
value = '%i' % draft
|
|
|
for root in repo._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 serialisation 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
|
|
|
else:
|
|
|
return 0
|
|
|
finally:
|
|
|
lock.release()
|
|
|
|
|
|
def visibleheads(repo):
|
|
|
"""return the set of visible head of this repo"""
|
|
|
# XXX we want a cache on this
|
|
|
sroots = repo._phaseroots[secret]
|
|
|
if sroots:
|
|
|
# XXX very slow revset. storing heads or secret "boundary" would help.
|
|
|
revset = repo.set('heads(not (%ln::))', sroots)
|
|
|
|
|
|
vheads = [ctx.node() for ctx in revset]
|
|
|
if not vheads:
|
|
|
vheads.append(nullid)
|
|
|
else:
|
|
|
vheads = repo.heads()
|
|
|
return vheads
|
|
|
|
|
|
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:
|
|
|
msg = _('ignoring inconsistense public root from remote: %s')
|
|
|
repo.ui.warn(msg, nhex)
|
|
|
elif phase == 1:
|
|
|
if node in nodemap:
|
|
|
draftroots.append(node)
|
|
|
else:
|
|
|
msg = _('ignoring unexpected root from remote: %i %s')
|
|
|
repo.ui.warn(msg, phase, nhex)
|
|
|
# compute heads
|
|
|
revset = repo.set('heads((%ln + parents(%ln)) - (%ln::%ln))',
|
|
|
subset, draftroots, draftroots, subset)
|
|
|
publicheads = [c.node() for c in revset]
|
|
|
return publicheads, draftroots
|
|
|
|
|
|
|
