mirror of
https://github.com/facebook/sapling.git
synced 2025-01-07 14:10:42 +03:00
0b425b5f11
Summary: Add `HG_SHAREDPENDING` which contains the path to the shared primary repository, similar to how `HG_PENDING` contains the path to the local repository. Repositories that are not shared check whether either of these refer to the local repository path. Repositories that are shared check whether the pending directory matches their own path, or the shared-pending directory matches their shared path, via the new `trysharedpending` function. This fixes the asymmetry in shared repos where pending changes made in a shared repo were not visible in the primary repo, even though they were visible the other way around. Reviewed By: quark-zju Differential Revision: D9699164 fbshipit-source-id: 31bc5fb2df6e9b9468b6ef39aabf877045c2a011
690 lines
24 KiB
Python
690 lines
24 KiB
Python
""" Mercurial phases support code
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---
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Copyright 2011 Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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Logilab SA <contact@logilab.fr>
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Augie Fackler <durin42@gmail.com>
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This software may be used and distributed according to the terms
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of the GNU General Public License version 2 or any later version.
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---
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This module implements most phase logic in mercurial.
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Basic Concept
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=============
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A 'changeset phase' is an indicator that tells us how a changeset is
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manipulated and communicated. The details of each phase is described
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below, here we describe the properties they have in common.
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Like bookmarks, phases are not stored in history and thus are not
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permanent and leave no audit trail.
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First, no changeset can be in two phases at once. Phases are ordered,
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so they can be considered from lowest to highest. The default, lowest
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phase is 'public' - this is the normal phase of existing changesets. A
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child changeset can not be in a lower phase than its parents.
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These phases share a hierarchy of traits:
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immutable shared
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public: X X
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draft: X
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secret:
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Local commits are draft by default.
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Phase Movement and Exchange
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===========================
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Phase data is exchanged by pushkey on pull and push. Some servers have
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a publish option set, we call such a server a "publishing server".
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Pushing a draft changeset to a publishing server changes the phase to
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public.
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A small list of fact/rules define the exchange of phase:
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* old client never changes server states
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* pull never changes server states
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* publish and old server changesets are seen as public by client
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* any secret changeset seen in another repository is lowered to at
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least draft
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Here is the final table summing up the 49 possible use cases of phase
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exchange:
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server
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old publish non-publish
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N X N D P N D P
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old client
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pull
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N - X/X - X/D X/P - X/D X/P
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X - X/X - X/D X/P - X/D X/P
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push
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X X/X X/X X/P X/P X/P X/D X/D X/P
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new client
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pull
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N - P/X - P/D P/P - D/D P/P
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D - P/X - P/D P/P - D/D P/P
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P - P/X - P/D P/P - P/D P/P
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push
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D P/X P/X P/P P/P P/P D/D D/D P/P
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P P/X P/X P/P P/P P/P P/P P/P P/P
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Legend:
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A/B = final state on client / state on server
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* N = new/not present,
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* P = public,
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* D = draft,
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* X = not tracked (i.e., the old client or server has no internal
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way of recording the phase.)
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passive = only pushes
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A cell here can be read like this:
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"When a new client pushes a draft changeset (D) to a publishing
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server where it's not present (N), it's marked public on both
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sides (P/P)."
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Note: old client behave as a publishing server with draft only content
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- other people see it as public
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- content is pushed as draft
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"""
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from __future__ import absolute_import
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import errno
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import struct
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from . import error, pycompat, smartset, txnutil, util
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from .i18n import _
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from .node import bin, hex, nullid, nullrev, short
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_fphasesentry = struct.Struct(">i20s")
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allphases = public, draft, secret = range(3)
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trackedphases = allphases[1:]
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phasenames = ["public", "draft", "secret"]
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try:
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xrange(0)
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except NameError:
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xrange = range
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def _readroots(repo, phasedefaults=None):
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"""Read phase roots from disk
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phasedefaults is a list of fn(repo, roots) callable, which are
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executed if the phase roots file does not exist. When phases are
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being initialized on an existing repository, this could be used to
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set selected changesets phase to something else than public.
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Return (roots, dirty) where dirty is true if roots differ from
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what is being stored.
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"""
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repo = repo.unfiltered()
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dirty = False
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roots = [set() for i in allphases]
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try:
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f, pending = txnutil.trysharedpending(
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repo.root, repo.sharedroot, repo.svfs, "phaseroots"
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)
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try:
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for line in f:
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phase, nh = line.split()
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roots[int(phase)].add(bin(nh))
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finally:
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f.close()
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except IOError as inst:
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if inst.errno != errno.ENOENT:
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raise
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if phasedefaults:
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for f in phasedefaults:
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roots = f(repo, roots)
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dirty = True
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return roots, dirty
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def binaryencode(phasemapping):
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"""encode a 'phase -> nodes' mapping into a binary stream
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Since phases are integer the mapping is actually a python list:
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[[PUBLIC_HEADS], [DRAFTS_HEADS], [SECRET_HEADS]]
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"""
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binarydata = []
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for phase, nodes in enumerate(phasemapping):
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for head in nodes:
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binarydata.append(_fphasesentry.pack(phase, head))
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return "".join(binarydata)
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def binarydecode(stream):
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"""decode a binary stream into a 'phase -> nodes' mapping
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Since phases are integer the mapping is actually a python list."""
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headsbyphase = [[] for i in allphases]
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entrysize = _fphasesentry.size
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while True:
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entry = stream.read(entrysize)
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if len(entry) < entrysize:
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if entry:
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raise error.Abort(_("bad phase-heads stream"))
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break
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phase, node = _fphasesentry.unpack(entry)
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headsbyphase[phase].append(node)
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return headsbyphase
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def _trackphasechange(data, rev, old, new):
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"""add a phase move the <data> dictionnary
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If data is None, nothing happens.
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"""
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if data is None:
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return
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existing = data.get(rev)
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if existing is not None:
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old = existing[0]
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data[rev] = (old, new)
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class phasecache(object):
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def __init__(self, repo, phasedefaults, _load=True):
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if _load:
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# Cheap trick to allow shallow-copy without copy module
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self.phaseroots, self.dirty = _readroots(repo, phasedefaults)
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self._loadedrevslen = 0
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self._phasesets = None
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self.filterunknown(repo)
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self.opener = repo.svfs
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def getrevset(self, repo, phases, subset=None):
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"""return a smartset for the given phases"""
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self.loadphaserevs(repo) # ensure phase's sets are loaded
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phases = set(phases)
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if public not in phases:
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# fast path: _phasesets contains the interesting sets,
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# might only need a union and post-filtering.
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if len(phases) == 1:
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[p] = phases
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revs = self._phasesets[p]
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else:
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revs = set.union(*[self._phasesets[p] for p in phases])
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if repo.changelog.filteredrevs:
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revs = revs - repo.changelog.filteredrevs
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if subset is None:
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return smartset.baseset(revs)
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else:
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return subset & smartset.baseset(revs)
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else:
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phases = set(allphases).difference(phases)
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if not phases:
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return smartset.fullreposet(repo)
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if len(phases) == 1:
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[p] = phases
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revs = self._phasesets[p]
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else:
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revs = set.union(*[self._phasesets[p] for p in phases])
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if subset is None:
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subset = smartset.fullreposet(repo)
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if not revs:
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return subset
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return subset.filter(lambda r: r not in revs)
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def copy(self):
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# Shallow copy meant to ensure isolation in
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# advance/retractboundary(), nothing more.
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ph = self.__class__(None, None, _load=False)
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ph.phaseroots = self.phaseroots[:]
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ph.dirty = self.dirty
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ph.opener = self.opener
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ph._loadedrevslen = self._loadedrevslen
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ph._phasesets = self._phasesets
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return ph
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def replace(self, phcache):
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"""replace all values in 'self' with content of phcache"""
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for a in ("phaseroots", "dirty", "opener", "_loadedrevslen", "_phasesets"):
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setattr(self, a, getattr(phcache, a))
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def _getphaserevsnative(self, repo):
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repo = repo.unfiltered()
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nativeroots = []
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for phase in trackedphases:
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nativeroots.append(map(repo.changelog.rev, self.phaseroots[phase]))
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return repo.changelog.computephases(nativeroots)
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def _computephaserevspure(self, repo):
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repo = repo.unfiltered()
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cl = repo.changelog
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self._phasesets = [set() for phase in allphases]
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roots = pycompat.maplist(cl.rev, self.phaseroots[secret])
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if roots:
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ps = set(cl.descendants(roots))
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for root in roots:
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ps.add(root)
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self._phasesets[secret] = ps
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roots = pycompat.maplist(cl.rev, self.phaseroots[draft])
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if roots:
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ps = set(cl.descendants(roots))
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for root in roots:
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ps.add(root)
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ps.difference_update(self._phasesets[secret])
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self._phasesets[draft] = ps
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self._loadedrevslen = len(cl)
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def loadphaserevs(self, repo):
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"""ensure phase information is loaded in the object"""
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if self._phasesets is None:
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try:
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res = self._getphaserevsnative(repo)
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self._loadedrevslen, self._phasesets = res
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except AttributeError:
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self._computephaserevspure(repo)
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def invalidate(self):
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self._loadedrevslen = 0
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self._phasesets = None
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def phase(self, repo, rev):
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# We need a repo argument here to be able to build _phasesets
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# if necessary. The repository instance is not stored in
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# phasecache to avoid reference cycles. The changelog instance
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# is not stored because it is a filecache() property and can
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# be replaced without us being notified.
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if rev == nullrev:
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return public
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if rev < nullrev:
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raise ValueError(_("cannot lookup negative revision"))
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if rev >= self._loadedrevslen:
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self.invalidate()
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self.loadphaserevs(repo)
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for phase in trackedphases:
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if rev in self._phasesets[phase]:
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return phase
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return public
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def write(self):
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if not self.dirty:
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return
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f = self.opener("phaseroots", "w", atomictemp=True, checkambig=True)
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try:
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self._write(f)
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finally:
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f.close()
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def _write(self, fp):
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for phase, roots in enumerate(self.phaseroots):
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for h in roots:
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fp.write("%i %s\n" % (phase, hex(h)))
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self.dirty = False
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def _updateroots(self, phase, newroots, tr):
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self.phaseroots[phase] = newroots
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self.invalidate()
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self.dirty = True
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tr.addfilegenerator("phase", ("phaseroots",), self._write)
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tr.hookargs["phases_moved"] = "1"
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def registernew(self, repo, tr, targetphase, nodes):
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repo = repo.unfiltered()
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self._retractboundary(repo, tr, targetphase, nodes)
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if tr is not None and "phases" in tr.changes:
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phasetracking = tr.changes["phases"]
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torev = repo.changelog.rev
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phase = self.phase
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for n in nodes:
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rev = torev(n)
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revphase = phase(repo, rev)
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_trackphasechange(phasetracking, rev, None, revphase)
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repo.invalidatevolatilesets()
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def advanceboundary(self, repo, tr, targetphase, nodes):
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"""Set all 'nodes' to phase 'targetphase'
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Nodes with a phase lower than 'targetphase' are not affected.
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"""
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# Be careful to preserve shallow-copied values: do not update
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# phaseroots values, replace them.
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if tr is None:
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phasetracking = None
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else:
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phasetracking = tr.changes.get("phases")
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repo = repo.unfiltered()
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delroots = [] # set of root deleted by this path
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for phase in xrange(targetphase + 1, len(allphases)):
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# filter nodes that are not in a compatible phase already
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nodes = [n for n in nodes if self.phase(repo, repo[n].rev()) >= phase]
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if not nodes:
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break # no roots to move anymore
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olds = self.phaseroots[phase]
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affected = repo.revs("%ln::%ln", olds, nodes)
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for r in affected:
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_trackphasechange(phasetracking, r, self.phase(repo, r), targetphase)
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roots = set(
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ctx.node() for ctx in repo.set("roots((%ln::) - %ld)", olds, affected)
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)
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if olds != roots:
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self._updateroots(phase, roots, tr)
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# some roots may need to be declared for lower phases
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delroots.extend(olds - roots)
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# declare deleted root in the target phase
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if targetphase != 0:
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self._retractboundary(repo, tr, targetphase, delroots)
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repo.invalidatevolatilesets()
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def retractboundary(self, repo, tr, targetphase, nodes):
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oldroots = self.phaseroots[: targetphase + 1]
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if tr is None:
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phasetracking = None
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else:
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phasetracking = tr.changes.get("phases")
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repo = repo.unfiltered()
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if (
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self._retractboundary(repo, tr, targetphase, nodes)
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and phasetracking is not None
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):
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# find the affected revisions
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new = self.phaseroots[targetphase]
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old = oldroots[targetphase]
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affected = set(repo.revs("(%ln::) - (%ln::)", new, old))
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# find the phase of the affected revision
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for phase in xrange(targetphase, -1, -1):
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if phase:
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roots = oldroots[phase]
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revs = set(repo.revs("%ln::%ld", roots, affected))
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affected -= revs
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else: # public phase
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revs = affected
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for r in revs:
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_trackphasechange(phasetracking, r, phase, targetphase)
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repo.invalidatevolatilesets()
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def _retractboundary(self, repo, tr, targetphase, nodes):
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# Be careful to preserve shallow-copied values: do not update
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# phaseroots values, replace them.
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repo = repo.unfiltered()
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currentroots = self.phaseroots[targetphase]
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finalroots = oldroots = set(currentroots)
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newroots = [n for n in nodes if self.phase(repo, repo[n].rev()) < targetphase]
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if newroots:
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if nullid in newroots:
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raise error.Abort(_("cannot change null revision phase"))
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currentroots = currentroots.copy()
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currentroots.update(newroots)
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# Only compute new roots for revs above the roots that are being
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# retracted.
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minnewroot = min(repo[n].rev() for n in newroots)
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aboveroots = [n for n in currentroots if repo[n].rev() >= minnewroot]
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updatedroots = repo.set("roots(%ln::)", aboveroots)
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finalroots = set(n for n in currentroots if repo[n].rev() < minnewroot)
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finalroots.update(ctx.node() for ctx in updatedroots)
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if finalroots != oldroots:
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self._updateroots(targetphase, finalroots, tr)
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return True
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return False
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def filterunknown(self, repo):
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"""remove unknown nodes from the phase boundary
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Nothing is lost as unknown nodes only hold data for their descendants.
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"""
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filtered = False
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nodemap = repo.changelog.nodemap # to filter unknown nodes
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for phase, nodes in enumerate(self.phaseroots):
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missing = sorted(node for node in nodes if node not in nodemap)
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if missing:
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for mnode in missing:
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repo.ui.debug(
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"removing unknown node %s from %i-phase boundary\n"
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% (short(mnode), phase)
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)
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nodes.symmetric_difference_update(missing)
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filtered = True
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if filtered:
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self.dirty = True
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# filterunknown is called by repo.destroyed, we may have no changes in
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# root but _phasesets contents is certainly invalid (or at least we
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# have not proper way to check that). related to issue 3858.
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#
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# The other caller is __init__ that have no _phasesets initialized
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# anyway. If this change we should consider adding a dedicated
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# "destroyed" function to phasecache or a proper cache key mechanism
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# (see branchmap one)
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self.invalidate()
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def advanceboundary(repo, tr, targetphase, nodes):
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"""Add nodes to a phase changing other nodes phases if necessary.
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This function move boundary *forward* this means that all nodes
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are set in the target phase or kept in a *lower* phase.
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Simplify boundary to contains phase roots only."""
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phcache = repo._phasecache.copy()
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phcache.advanceboundary(repo, tr, targetphase, nodes)
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repo._phasecache.replace(phcache)
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def retractboundary(repo, tr, targetphase, nodes):
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"""Set nodes back to a phase changing other nodes phases if
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necessary.
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This function move boundary *backward* this means that all nodes
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are set in the target phase or kept in a *higher* phase.
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Simplify boundary to contains phase roots only."""
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phcache = repo._phasecache.copy()
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phcache.retractboundary(repo, tr, targetphase, nodes)
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repo._phasecache.replace(phcache)
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def registernew(repo, tr, targetphase, nodes):
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"""register a new revision and its phase
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Code adding revisions to the repository should use this function to
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set new changeset in their target phase (or higher).
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"""
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phcache = repo._phasecache.copy()
|
|
phcache.registernew(repo, tr, targetphase, nodes)
|
|
repo._phasecache.replace(phcache)
|
|
|
|
|
|
def listphases(repo):
|
|
"""List phases root for serialization over pushkey"""
|
|
# Use ordered dictionary so behavior is deterministic.
|
|
keys = util.sortdict()
|
|
value = "%i" % draft
|
|
cl = repo.unfiltered().changelog
|
|
for root in repo._phasecache.phaseroots[draft]:
|
|
if repo._phasecache.phase(repo, cl.rev(root)) <= draft:
|
|
keys[hex(root)] = value
|
|
|
|
if repo.publishing():
|
|
# 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"""
|
|
repo = repo.unfiltered()
|
|
with repo.lock():
|
|
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:
|
|
with repo.transaction("pushkey-phase") as tr:
|
|
advanceboundary(repo, tr, newphase, [bin(nhex)])
|
|
return True
|
|
elif currentphase == newphase:
|
|
# raced, but got correct result
|
|
return True
|
|
else:
|
|
return False
|
|
|
|
|
|
def subsetphaseheads(repo, subset):
|
|
"""Finds the phase heads for a subset of a history
|
|
|
|
Returns a list indexed by phase number where each item is a list of phase
|
|
head nodes.
|
|
"""
|
|
cl = repo.changelog
|
|
|
|
headsbyphase = [[] for i in allphases]
|
|
# No need to keep track of secret phase; any heads in the subset that
|
|
# are not mentioned are implicitly secret.
|
|
for phase in allphases[:-1]:
|
|
revset = "heads(%%ln & %s())" % phasenames[phase]
|
|
headsbyphase[phase] = [cl.node(r) for r in repo.revs(revset, subset)]
|
|
return headsbyphase
|
|
|
|
|
|
def updatephases(repo, trgetter, headsbyphase):
|
|
"""Updates the repo with the given phase heads"""
|
|
# Now advance phase boundaries of all but secret phase
|
|
#
|
|
# run the update (and fetch transaction) only if there are actually things
|
|
# to update. This avoid creating empty transaction during no-op operation.
|
|
|
|
for phase in allphases[:-1]:
|
|
revset = "%%ln - %s()" % phasenames[phase]
|
|
heads = [c.node() for c in repo.set(revset, headsbyphase[phase])]
|
|
if heads:
|
|
advanceboundary(repo, trgetter(), phase, heads)
|
|
|
|
|
|
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
|
|
"""
|
|
repo = repo.unfiltered()
|
|
# 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 == public:
|
|
if node != nullid:
|
|
repo.ui.warn(
|
|
_("ignoring inconsistent public root" " from remote: %s\n") % nhex
|
|
)
|
|
elif phase == draft:
|
|
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
|
|
|
|
|
|
class remotephasessummary(object):
|
|
"""summarize phase information on the remote side
|
|
|
|
:publishing: True is the remote is publishing
|
|
:publicheads: list of remote public phase heads (nodes)
|
|
:draftheads: list of remote draft phase heads (nodes)
|
|
:draftroots: list of remote draft phase root (nodes)
|
|
"""
|
|
|
|
def __init__(self, repo, remotesubset, remoteroots):
|
|
unfi = repo.unfiltered()
|
|
self._allremoteroots = remoteroots
|
|
|
|
self.publishing = remoteroots.get("publishing", False)
|
|
|
|
ana = analyzeremotephases(repo, remotesubset, remoteroots)
|
|
self.publicheads, self.draftroots = ana
|
|
# Get the list of all "heads" revs draft on remote
|
|
dheads = unfi.set("heads(%ln::%ln)", self.draftroots, remotesubset)
|
|
self.draftheads = [c.node() for c in dheads]
|
|
|
|
|
|
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"""
|
|
repo = repo.unfiltered()
|
|
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")
|
|
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])
|
|
|
|
|
|
def preparehookargs(node, old, new):
|
|
if old is None:
|
|
old = ""
|
|
else:
|
|
old = phasenames[old]
|
|
return {"node": node, "oldphase": old, "phase": phasenames[new]}
|