|
|
# upgrade.py - functions for in place upgrade of Mercurial repository
|
|
|
#
|
|
|
# Copyright (c) 2016-present, Gregory Szorc
|
|
|
#
|
|
|
# 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
|
|
|
|
|
|
import stat
|
|
|
import tempfile
|
|
|
|
|
|
from .i18n import _
|
|
|
from . import (
|
|
|
changelog,
|
|
|
error,
|
|
|
filelog,
|
|
|
hg,
|
|
|
localrepo,
|
|
|
manifest,
|
|
|
revlog,
|
|
|
scmutil,
|
|
|
util,
|
|
|
vfs as vfsmod,
|
|
|
)
|
|
|
|
|
|
def requiredsourcerequirements(repo):
|
|
|
"""Obtain requirements required to be present to upgrade a repo.
|
|
|
|
|
|
An upgrade will not be allowed if the repository doesn't have the
|
|
|
requirements returned by this function.
|
|
|
"""
|
|
|
return {
|
|
|
# Introduced in Mercurial 0.9.2.
|
|
|
'revlogv1',
|
|
|
# Introduced in Mercurial 0.9.2.
|
|
|
'store',
|
|
|
}
|
|
|
|
|
|
def blocksourcerequirements(repo):
|
|
|
"""Obtain requirements that will prevent an upgrade from occurring.
|
|
|
|
|
|
An upgrade cannot be performed if the source repository contains a
|
|
|
requirements in the returned set.
|
|
|
"""
|
|
|
return {
|
|
|
# The upgrade code does not yet support these experimental features.
|
|
|
# This is an artificial limitation.
|
|
|
'treemanifest',
|
|
|
# This was a precursor to generaldelta and was never enabled by default.
|
|
|
# It should (hopefully) not exist in the wild.
|
|
|
'parentdelta',
|
|
|
# Upgrade should operate on the actual store, not the shared link.
|
|
|
'shared',
|
|
|
}
|
|
|
|
|
|
def supportremovedrequirements(repo):
|
|
|
"""Obtain requirements that can be removed during an upgrade.
|
|
|
|
|
|
If an upgrade were to create a repository that dropped a requirement,
|
|
|
the dropped requirement must appear in the returned set for the upgrade
|
|
|
to be allowed.
|
|
|
"""
|
|
|
return set()
|
|
|
|
|
|
def supporteddestrequirements(repo):
|
|
|
"""Obtain requirements that upgrade supports in the destination.
|
|
|
|
|
|
If the result of the upgrade would create requirements not in this set,
|
|
|
the upgrade is disallowed.
|
|
|
|
|
|
Extensions should monkeypatch this to add their custom requirements.
|
|
|
"""
|
|
|
return {
|
|
|
'dotencode',
|
|
|
'fncache',
|
|
|
'generaldelta',
|
|
|
'revlogv1',
|
|
|
'store',
|
|
|
}
|
|
|
|
|
|
def allowednewrequirements(repo):
|
|
|
"""Obtain requirements that can be added to a repository during upgrade.
|
|
|
|
|
|
This is used to disallow proposed requirements from being added when
|
|
|
they weren't present before.
|
|
|
|
|
|
We use a list of allowed requirement additions instead of a list of known
|
|
|
bad additions because the whitelist approach is safer and will prevent
|
|
|
future, unknown requirements from accidentally being added.
|
|
|
"""
|
|
|
return {
|
|
|
'dotencode',
|
|
|
'fncache',
|
|
|
'generaldelta',
|
|
|
}
|
|
|
|
|
|
def preservedrequirements(repo):
|
|
|
return set()
|
|
|
|
|
|
deficiency = 'deficiency'
|
|
|
optimisation = 'optimization'
|
|
|
|
|
|
class improvement(object):
|
|
|
"""Represents an improvement that can be made as part of an upgrade.
|
|
|
|
|
|
The following attributes are defined on each instance:
|
|
|
|
|
|
name
|
|
|
Machine-readable string uniquely identifying this improvement. It
|
|
|
will be mapped to an action later in the upgrade process.
|
|
|
|
|
|
type
|
|
|
Either ``deficiency`` or ``optimisation``. A deficiency is an obvious
|
|
|
problem. An optimization is an action (sometimes optional) that
|
|
|
can be taken to further improve the state of the repository.
|
|
|
|
|
|
description
|
|
|
Message intended for humans explaining the improvement in more detail,
|
|
|
including the implications of it. For ``deficiency`` types, should be
|
|
|
worded in the present tense. For ``optimisation`` types, should be
|
|
|
worded in the future tense.
|
|
|
|
|
|
upgrademessage
|
|
|
Message intended for humans explaining what an upgrade addressing this
|
|
|
issue will do. Should be worded in the future tense.
|
|
|
"""
|
|
|
def __init__(self, name, type, description, upgrademessage):
|
|
|
self.name = name
|
|
|
self.type = type
|
|
|
self.description = description
|
|
|
self.upgrademessage = upgrademessage
|
|
|
|
|
|
def __eq__(self, other):
|
|
|
if not isinstance(other, improvement):
|
|
|
# This is what python tell use to do
|
|
|
return NotImplemented
|
|
|
return self.name == other.name
|
|
|
|
|
|
def __ne__(self, other):
|
|
|
return not self == other
|
|
|
|
|
|
def __hash__(self):
|
|
|
return hash(self.name)
|
|
|
|
|
|
allformatvariant = []
|
|
|
|
|
|
def registerformatvariant(cls):
|
|
|
allformatvariant.append(cls)
|
|
|
return cls
|
|
|
|
|
|
class formatvariant(improvement):
|
|
|
"""an improvement subclass dedicated to repository format"""
|
|
|
type = deficiency
|
|
|
### The following attributes should be defined for each class:
|
|
|
|
|
|
# machine-readable string uniquely identifying this improvement. it will be
|
|
|
# mapped to an action later in the upgrade process.
|
|
|
name = None
|
|
|
|
|
|
# message intended for humans explaining the improvement in more detail,
|
|
|
# including the implications of it ``deficiency`` types, should be worded
|
|
|
# in the present tense.
|
|
|
description = None
|
|
|
|
|
|
# message intended for humans explaining what an upgrade addressing this
|
|
|
# issue will do. should be worded in the future tense.
|
|
|
upgrademessage = None
|
|
|
|
|
|
# value of current Mercurial default for new repository
|
|
|
default = None
|
|
|
|
|
|
def __init__(self):
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
@staticmethod
|
|
|
def fromrepo(repo):
|
|
|
"""current value of the variant in the repository"""
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
@staticmethod
|
|
|
def fromconfig(repo):
|
|
|
"""current value of the variant in the configuration"""
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
class requirementformatvariant(formatvariant):
|
|
|
"""formatvariant based on a 'requirement' name.
|
|
|
|
|
|
Many format variant are controlled by a 'requirement'. We define a small
|
|
|
subclass to factor the code.
|
|
|
"""
|
|
|
|
|
|
# the requirement that control this format variant
|
|
|
_requirement = None
|
|
|
|
|
|
@staticmethod
|
|
|
def _newreporequirements(repo):
|
|
|
return localrepo.newreporequirements(repo)
|
|
|
|
|
|
@classmethod
|
|
|
def fromrepo(cls, repo):
|
|
|
assert cls._requirement is not None
|
|
|
return cls._requirement in repo.requirements
|
|
|
|
|
|
@classmethod
|
|
|
def fromconfig(cls, repo):
|
|
|
assert cls._requirement is not None
|
|
|
return cls._requirement in cls._newreporequirements(repo)
|
|
|
|
|
|
@registerformatvariant
|
|
|
class fncache(requirementformatvariant):
|
|
|
name = 'fncache'
|
|
|
|
|
|
_requirement = 'fncache'
|
|
|
|
|
|
default = True
|
|
|
|
|
|
description = _('long and reserved filenames may not work correctly; '
|
|
|
'repository performance is sub-optimal')
|
|
|
|
|
|
upgrademessage = _('repository will be more resilient to storing '
|
|
|
'certain paths and performance of certain '
|
|
|
'operations should be improved')
|
|
|
|
|
|
@registerformatvariant
|
|
|
class dotencode(requirementformatvariant):
|
|
|
name = 'dotencode'
|
|
|
|
|
|
_requirement = 'dotencode'
|
|
|
|
|
|
default = True
|
|
|
|
|
|
description = _('storage of filenames beginning with a period or '
|
|
|
'space may not work correctly')
|
|
|
|
|
|
upgrademessage = _('repository will be better able to store files '
|
|
|
'beginning with a space or period')
|
|
|
|
|
|
@registerformatvariant
|
|
|
class generaldelta(requirementformatvariant):
|
|
|
name = 'generaldelta'
|
|
|
|
|
|
_requirement = 'generaldelta'
|
|
|
|
|
|
default = True
|
|
|
|
|
|
description = _('deltas within internal storage are unable to '
|
|
|
'choose optimal revisions; repository is larger and '
|
|
|
'slower than it could be; interaction with other '
|
|
|
'repositories may require extra network and CPU '
|
|
|
'resources, making "hg push" and "hg pull" slower')
|
|
|
|
|
|
upgrademessage = _('repository storage will be able to create '
|
|
|
'optimal deltas; new repository data will be '
|
|
|
'smaller and read times should decrease; '
|
|
|
'interacting with other repositories using this '
|
|
|
'storage model should require less network and '
|
|
|
'CPU resources, making "hg push" and "hg pull" '
|
|
|
'faster')
|
|
|
|
|
|
@registerformatvariant
|
|
|
class removecldeltachain(formatvariant):
|
|
|
name = 'plain-cl-delta'
|
|
|
|
|
|
default = True
|
|
|
|
|
|
description = _('changelog storage is using deltas instead of '
|
|
|
'raw entries; changelog reading and any '
|
|
|
'operation relying on changelog data are slower '
|
|
|
'than they could be')
|
|
|
|
|
|
upgrademessage = _('changelog storage will be reformated to '
|
|
|
'store raw entries; changelog reading will be '
|
|
|
'faster; changelog size may be reduced')
|
|
|
|
|
|
@staticmethod
|
|
|
def fromrepo(repo):
|
|
|
# Mercurial 4.0 changed changelogs to not use delta chains. Search for
|
|
|
# changelogs with deltas.
|
|
|
cl = repo.changelog
|
|
|
chainbase = cl.chainbase
|
|
|
return all(rev == chainbase(rev) for rev in cl)
|
|
|
|
|
|
@staticmethod
|
|
|
def fromconfig(repo):
|
|
|
return True
|
|
|
|
|
|
@registerformatvariant
|
|
|
class compressionengine(formatvariant):
|
|
|
name = 'compression'
|
|
|
default = 'zlib'
|
|
|
|
|
|
description = _('Compresion algorithm used to compress data. '
|
|
|
'Some engine are faster than other')
|
|
|
|
|
|
upgrademessage = _('revlog content will be recompressed with the new '
|
|
|
'algorithm.')
|
|
|
|
|
|
@classmethod
|
|
|
def fromrepo(cls, repo):
|
|
|
for req in repo.requirements:
|
|
|
if req.startswith('exp-compression-'):
|
|
|
return req.split('-', 2)[2]
|
|
|
return 'zlib'
|
|
|
|
|
|
@classmethod
|
|
|
def fromconfig(cls, repo):
|
|
|
return repo.ui.config('experimental', 'format.compression')
|
|
|
|
|
|
def finddeficiencies(repo):
|
|
|
"""returns a list of deficiencies that the repo suffer from"""
|
|
|
deficiencies = []
|
|
|
|
|
|
# We could detect lack of revlogv1 and store here, but they were added
|
|
|
# in 0.9.2 and we don't support upgrading repos without these
|
|
|
# requirements, so let's not bother.
|
|
|
|
|
|
for fv in allformatvariant:
|
|
|
if not fv.fromrepo(repo):
|
|
|
deficiencies.append(fv)
|
|
|
|
|
|
return deficiencies
|
|
|
|
|
|
def findoptimizations(repo):
|
|
|
"""Determine optimisation that could be used during upgrade"""
|
|
|
# These are unconditionally added. There is logic later that figures out
|
|
|
# which ones to apply.
|
|
|
optimizations = []
|
|
|
|
|
|
optimizations.append(improvement(
|
|
|
name='redeltaparent',
|
|
|
type=optimisation,
|
|
|
description=_('deltas within internal storage will be recalculated to '
|
|
|
'choose an optimal base revision where this was not '
|
|
|
'already done; the size of the repository may shrink and '
|
|
|
'various operations may become faster; the first time '
|
|
|
'this optimization is performed could slow down upgrade '
|
|
|
'execution considerably; subsequent invocations should '
|
|
|
'not run noticeably slower'),
|
|
|
upgrademessage=_('deltas within internal storage will choose a new '
|
|
|
'base revision if needed')))
|
|
|
|
|
|
optimizations.append(improvement(
|
|
|
name='redeltamultibase',
|
|
|
type=optimisation,
|
|
|
description=_('deltas within internal storage will be recalculated '
|
|
|
'against multiple base revision and the smallest '
|
|
|
'difference will be used; the size of the repository may '
|
|
|
'shrink significantly when there are many merges; this '
|
|
|
'optimization will slow down execution in proportion to '
|
|
|
'the number of merges in the repository and the amount '
|
|
|
'of files in the repository; this slow down should not '
|
|
|
'be significant unless there are tens of thousands of '
|
|
|
'files and thousands of merges'),
|
|
|
upgrademessage=_('deltas within internal storage will choose an '
|
|
|
'optimal delta by computing deltas against multiple '
|
|
|
'parents; may slow down execution time '
|
|
|
'significantly')))
|
|
|
|
|
|
optimizations.append(improvement(
|
|
|
name='redeltaall',
|
|
|
type=optimisation,
|
|
|
description=_('deltas within internal storage will always be '
|
|
|
'recalculated without reusing prior deltas; this will '
|
|
|
'likely make execution run several times slower; this '
|
|
|
'optimization is typically not needed'),
|
|
|
upgrademessage=_('deltas within internal storage will be fully '
|
|
|
'recomputed; this will likely drastically slow down '
|
|
|
'execution time')))
|
|
|
|
|
|
optimizations.append(improvement(
|
|
|
name='redeltafulladd',
|
|
|
type=optimisation,
|
|
|
description=_('every revision will be re-added as if it was new '
|
|
|
'content. It will go through the full storage '
|
|
|
'mechanism giving extensions a chance to process it '
|
|
|
'(eg. lfs). This is similar to "redeltaall" but even '
|
|
|
'slower since more logic is involved.'),
|
|
|
upgrademessage=_('each revision will be added as new content to the '
|
|
|
'internal storage; this will likely drastically slow '
|
|
|
'down execution time, but some extensions might need '
|
|
|
'it')))
|
|
|
|
|
|
return optimizations
|
|
|
|
|
|
def determineactions(repo, deficiencies, sourcereqs, destreqs):
|
|
|
"""Determine upgrade actions that will be performed.
|
|
|
|
|
|
Given a list of improvements as returned by ``finddeficiencies`` and
|
|
|
``findoptimizations``, determine the list of upgrade actions that
|
|
|
will be performed.
|
|
|
|
|
|
The role of this function is to filter improvements if needed, apply
|
|
|
recommended optimizations from the improvements list that make sense,
|
|
|
etc.
|
|
|
|
|
|
Returns a list of action names.
|
|
|
"""
|
|
|
newactions = []
|
|
|
|
|
|
knownreqs = supporteddestrequirements(repo)
|
|
|
|
|
|
for d in deficiencies:
|
|
|
name = d.name
|
|
|
|
|
|
# If the action is a requirement that doesn't show up in the
|
|
|
# destination requirements, prune the action.
|
|
|
if name in knownreqs and name not in destreqs:
|
|
|
continue
|
|
|
|
|
|
newactions.append(d)
|
|
|
|
|
|
# FUTURE consider adding some optimizations here for certain transitions.
|
|
|
# e.g. adding generaldelta could schedule parent redeltas.
|
|
|
|
|
|
return newactions
|
|
|
|
|
|
def _revlogfrompath(repo, path):
|
|
|
"""Obtain a revlog from a repo path.
|
|
|
|
|
|
An instance of the appropriate class is returned.
|
|
|
"""
|
|
|
if path == '00changelog.i':
|
|
|
return changelog.changelog(repo.svfs)
|
|
|
elif path.endswith('00manifest.i'):
|
|
|
mandir = path[:-len('00manifest.i')]
|
|
|
return manifest.manifestrevlog(repo.svfs, dir=mandir)
|
|
|
else:
|
|
|
#reverse of "/".join(("data", path + ".i"))
|
|
|
return filelog.filelog(repo.svfs, path[5:-2])
|
|
|
|
|
|
def _copyrevlogs(ui, srcrepo, dstrepo, tr, deltareuse, aggressivemergedeltas):
|
|
|
"""Copy revlogs between 2 repos."""
|
|
|
revcount = 0
|
|
|
srcsize = 0
|
|
|
srcrawsize = 0
|
|
|
dstsize = 0
|
|
|
fcount = 0
|
|
|
frevcount = 0
|
|
|
fsrcsize = 0
|
|
|
frawsize = 0
|
|
|
fdstsize = 0
|
|
|
mcount = 0
|
|
|
mrevcount = 0
|
|
|
msrcsize = 0
|
|
|
mrawsize = 0
|
|
|
mdstsize = 0
|
|
|
crevcount = 0
|
|
|
csrcsize = 0
|
|
|
crawsize = 0
|
|
|
cdstsize = 0
|
|
|
|
|
|
# Perform a pass to collect metadata. This validates we can open all
|
|
|
# source files and allows a unified progress bar to be displayed.
|
|
|
for unencoded, encoded, size in srcrepo.store.walk():
|
|
|
if unencoded.endswith('.d'):
|
|
|
continue
|
|
|
|
|
|
rl = _revlogfrompath(srcrepo, unencoded)
|
|
|
revcount += len(rl)
|
|
|
|
|
|
datasize = 0
|
|
|
rawsize = 0
|
|
|
idx = rl.index
|
|
|
for rev in rl:
|
|
|
e = idx[rev]
|
|
|
datasize += e[1]
|
|
|
rawsize += e[2]
|
|
|
|
|
|
srcsize += datasize
|
|
|
srcrawsize += rawsize
|
|
|
|
|
|
# This is for the separate progress bars.
|
|
|
if isinstance(rl, changelog.changelog):
|
|
|
crevcount += len(rl)
|
|
|
csrcsize += datasize
|
|
|
crawsize += rawsize
|
|
|
elif isinstance(rl, manifest.manifestrevlog):
|
|
|
mcount += 1
|
|
|
mrevcount += len(rl)
|
|
|
msrcsize += datasize
|
|
|
mrawsize += rawsize
|
|
|
elif isinstance(rl, filelog.filelog):
|
|
|
fcount += 1
|
|
|
frevcount += len(rl)
|
|
|
fsrcsize += datasize
|
|
|
frawsize += rawsize
|
|
|
else:
|
|
|
error.ProgrammingError('unknown revlog type')
|
|
|
|
|
|
if not revcount:
|
|
|
return
|
|
|
|
|
|
ui.write(_('migrating %d total revisions (%d in filelogs, %d in manifests, '
|
|
|
'%d in changelog)\n') %
|
|
|
(revcount, frevcount, mrevcount, crevcount))
|
|
|
ui.write(_('migrating %s in store; %s tracked data\n') % (
|
|
|
(util.bytecount(srcsize), util.bytecount(srcrawsize))))
|
|
|
|
|
|
# Used to keep track of progress.
|
|
|
progress = []
|
|
|
def oncopiedrevision(rl, rev, node):
|
|
|
progress[1] += 1
|
|
|
srcrepo.ui.progress(progress[0], progress[1], total=progress[2])
|
|
|
|
|
|
# Do the actual copying.
|
|
|
# FUTURE this operation can be farmed off to worker processes.
|
|
|
seen = set()
|
|
|
for unencoded, encoded, size in srcrepo.store.walk():
|
|
|
if unencoded.endswith('.d'):
|
|
|
continue
|
|
|
|
|
|
oldrl = _revlogfrompath(srcrepo, unencoded)
|
|
|
newrl = _revlogfrompath(dstrepo, unencoded)
|
|
|
|
|
|
if isinstance(oldrl, changelog.changelog) and 'c' not in seen:
|
|
|
ui.write(_('finished migrating %d manifest revisions across %d '
|
|
|
'manifests; change in size: %s\n') %
|
|
|
(mrevcount, mcount, util.bytecount(mdstsize - msrcsize)))
|
|
|
|
|
|
ui.write(_('migrating changelog containing %d revisions '
|
|
|
'(%s in store; %s tracked data)\n') %
|
|
|
(crevcount, util.bytecount(csrcsize),
|
|
|
util.bytecount(crawsize)))
|
|
|
seen.add('c')
|
|
|
progress[:] = [_('changelog revisions'), 0, crevcount]
|
|
|
elif isinstance(oldrl, manifest.manifestrevlog) and 'm' not in seen:
|
|
|
ui.write(_('finished migrating %d filelog revisions across %d '
|
|
|
'filelogs; change in size: %s\n') %
|
|
|
(frevcount, fcount, util.bytecount(fdstsize - fsrcsize)))
|
|
|
|
|
|
ui.write(_('migrating %d manifests containing %d revisions '
|
|
|
'(%s in store; %s tracked data)\n') %
|
|
|
(mcount, mrevcount, util.bytecount(msrcsize),
|
|
|
util.bytecount(mrawsize)))
|
|
|
seen.add('m')
|
|
|
progress[:] = [_('manifest revisions'), 0, mrevcount]
|
|
|
elif 'f' not in seen:
|
|
|
ui.write(_('migrating %d filelogs containing %d revisions '
|
|
|
'(%s in store; %s tracked data)\n') %
|
|
|
(fcount, frevcount, util.bytecount(fsrcsize),
|
|
|
util.bytecount(frawsize)))
|
|
|
seen.add('f')
|
|
|
progress[:] = [_('file revisions'), 0, frevcount]
|
|
|
|
|
|
ui.progress(progress[0], progress[1], total=progress[2])
|
|
|
|
|
|
ui.note(_('cloning %d revisions from %s\n') % (len(oldrl), unencoded))
|
|
|
oldrl.clone(tr, newrl, addrevisioncb=oncopiedrevision,
|
|
|
deltareuse=deltareuse,
|
|
|
aggressivemergedeltas=aggressivemergedeltas)
|
|
|
|
|
|
datasize = 0
|
|
|
idx = newrl.index
|
|
|
for rev in newrl:
|
|
|
datasize += idx[rev][1]
|
|
|
|
|
|
dstsize += datasize
|
|
|
|
|
|
if isinstance(newrl, changelog.changelog):
|
|
|
cdstsize += datasize
|
|
|
elif isinstance(newrl, manifest.manifestrevlog):
|
|
|
mdstsize += datasize
|
|
|
else:
|
|
|
fdstsize += datasize
|
|
|
|
|
|
ui.progress(progress[0], None)
|
|
|
|
|
|
ui.write(_('finished migrating %d changelog revisions; change in size: '
|
|
|
'%s\n') % (crevcount, util.bytecount(cdstsize - csrcsize)))
|
|
|
|
|
|
ui.write(_('finished migrating %d total revisions; total change in store '
|
|
|
'size: %s\n') % (revcount, util.bytecount(dstsize - srcsize)))
|
|
|
|
|
|
def _filterstorefile(srcrepo, dstrepo, requirements, path, mode, st):
|
|
|
"""Determine whether to copy a store file during upgrade.
|
|
|
|
|
|
This function is called when migrating store files from ``srcrepo`` to
|
|
|
``dstrepo`` as part of upgrading a repository.
|
|
|
|
|
|
Args:
|
|
|
srcrepo: repo we are copying from
|
|
|
dstrepo: repo we are copying to
|
|
|
requirements: set of requirements for ``dstrepo``
|
|
|
path: store file being examined
|
|
|
mode: the ``ST_MODE`` file type of ``path``
|
|
|
st: ``stat`` data structure for ``path``
|
|
|
|
|
|
Function should return ``True`` if the file is to be copied.
|
|
|
"""
|
|
|
# Skip revlogs.
|
|
|
if path.endswith(('.i', '.d')):
|
|
|
return False
|
|
|
# Skip transaction related files.
|
|
|
if path.startswith('undo'):
|
|
|
return False
|
|
|
# Only copy regular files.
|
|
|
if mode != stat.S_IFREG:
|
|
|
return False
|
|
|
# Skip other skipped files.
|
|
|
if path in ('lock', 'fncache'):
|
|
|
return False
|
|
|
|
|
|
return True
|
|
|
|
|
|
def _finishdatamigration(ui, srcrepo, dstrepo, requirements):
|
|
|
"""Hook point for extensions to perform additional actions during upgrade.
|
|
|
|
|
|
This function is called after revlogs and store files have been copied but
|
|
|
before the new store is swapped into the original location.
|
|
|
"""
|
|
|
|
|
|
def _upgraderepo(ui, srcrepo, dstrepo, requirements, actions):
|
|
|
"""Do the low-level work of upgrading a repository.
|
|
|
|
|
|
The upgrade is effectively performed as a copy between a source
|
|
|
repository and a temporary destination repository.
|
|
|
|
|
|
The source repository is unmodified for as long as possible so the
|
|
|
upgrade can abort at any time without causing loss of service for
|
|
|
readers and without corrupting the source repository.
|
|
|
"""
|
|
|
assert srcrepo.currentwlock()
|
|
|
assert dstrepo.currentwlock()
|
|
|
|
|
|
ui.write(_('(it is safe to interrupt this process any time before '
|
|
|
'data migration completes)\n'))
|
|
|
|
|
|
if 'redeltaall' in actions:
|
|
|
deltareuse = revlog.revlog.DELTAREUSENEVER
|
|
|
elif 'redeltaparent' in actions:
|
|
|
deltareuse = revlog.revlog.DELTAREUSESAMEREVS
|
|
|
elif 'redeltamultibase' in actions:
|
|
|
deltareuse = revlog.revlog.DELTAREUSESAMEREVS
|
|
|
elif 'redeltafulladd' in actions:
|
|
|
deltareuse = revlog.revlog.DELTAREUSEFULLADD
|
|
|
else:
|
|
|
deltareuse = revlog.revlog.DELTAREUSEALWAYS
|
|
|
|
|
|
with dstrepo.transaction('upgrade') as tr:
|
|
|
_copyrevlogs(ui, srcrepo, dstrepo, tr, deltareuse,
|
|
|
'redeltamultibase' in actions)
|
|
|
|
|
|
# Now copy other files in the store directory.
|
|
|
# The sorted() makes execution deterministic.
|
|
|
for p, kind, st in sorted(srcrepo.store.vfs.readdir('', stat=True)):
|
|
|
if not _filterstorefile(srcrepo, dstrepo, requirements,
|
|
|
p, kind, st):
|
|
|
continue
|
|
|
|
|
|
srcrepo.ui.write(_('copying %s\n') % p)
|
|
|
src = srcrepo.store.rawvfs.join(p)
|
|
|
dst = dstrepo.store.rawvfs.join(p)
|
|
|
util.copyfile(src, dst, copystat=True)
|
|
|
|
|
|
_finishdatamigration(ui, srcrepo, dstrepo, requirements)
|
|
|
|
|
|
ui.write(_('data fully migrated to temporary repository\n'))
|
|
|
|
|
|
backuppath = tempfile.mkdtemp(prefix='upgradebackup.', dir=srcrepo.path)
|
|
|
backupvfs = vfsmod.vfs(backuppath)
|
|
|
|
|
|
# Make a backup of requires file first, as it is the first to be modified.
|
|
|
util.copyfile(srcrepo.vfs.join('requires'), backupvfs.join('requires'))
|
|
|
|
|
|
# We install an arbitrary requirement that clients must not support
|
|
|
# as a mechanism to lock out new clients during the data swap. This is
|
|
|
# better than allowing a client to continue while the repository is in
|
|
|
# an inconsistent state.
|
|
|
ui.write(_('marking source repository as being upgraded; clients will be '
|
|
|
'unable to read from repository\n'))
|
|
|
scmutil.writerequires(srcrepo.vfs,
|
|
|
srcrepo.requirements | {'upgradeinprogress'})
|
|
|
|
|
|
ui.write(_('starting in-place swap of repository data\n'))
|
|
|
ui.write(_('replaced files will be backed up at %s\n') %
|
|
|
backuppath)
|
|
|
|
|
|
# Now swap in the new store directory. Doing it as a rename should make
|
|
|
# the operation nearly instantaneous and atomic (at least in well-behaved
|
|
|
# environments).
|
|
|
ui.write(_('replacing store...\n'))
|
|
|
tstart = util.timer()
|
|
|
util.rename(srcrepo.spath, backupvfs.join('store'))
|
|
|
util.rename(dstrepo.spath, srcrepo.spath)
|
|
|
elapsed = util.timer() - tstart
|
|
|
ui.write(_('store replacement complete; repository was inconsistent for '
|
|
|
'%0.1fs\n') % elapsed)
|
|
|
|
|
|
# We first write the requirements file. Any new requirements will lock
|
|
|
# out legacy clients.
|
|
|
ui.write(_('finalizing requirements file and making repository readable '
|
|
|
'again\n'))
|
|
|
scmutil.writerequires(srcrepo.vfs, requirements)
|
|
|
|
|
|
# The lock file from the old store won't be removed because nothing has a
|
|
|
# reference to its new location. So clean it up manually. Alternatively, we
|
|
|
# could update srcrepo.svfs and other variables to point to the new
|
|
|
# location. This is simpler.
|
|
|
backupvfs.unlink('store/lock')
|
|
|
|
|
|
return backuppath
|
|
|
|
|
|
def upgraderepo(ui, repo, run=False, optimize=None):
|
|
|
"""Upgrade a repository in place."""
|
|
|
optimize = set(optimize or [])
|
|
|
repo = repo.unfiltered()
|
|
|
|
|
|
# Ensure the repository can be upgraded.
|
|
|
missingreqs = requiredsourcerequirements(repo) - repo.requirements
|
|
|
if missingreqs:
|
|
|
raise error.Abort(_('cannot upgrade repository; requirement '
|
|
|
'missing: %s') % _(', ').join(sorted(missingreqs)))
|
|
|
|
|
|
blockedreqs = blocksourcerequirements(repo) & repo.requirements
|
|
|
if blockedreqs:
|
|
|
raise error.Abort(_('cannot upgrade repository; unsupported source '
|
|
|
'requirement: %s') %
|
|
|
_(', ').join(sorted(blockedreqs)))
|
|
|
|
|
|
# FUTURE there is potentially a need to control the wanted requirements via
|
|
|
# command arguments or via an extension hook point.
|
|
|
newreqs = localrepo.newreporequirements(repo)
|
|
|
newreqs.update(preservedrequirements(repo))
|
|
|
|
|
|
noremovereqs = (repo.requirements - newreqs -
|
|
|
supportremovedrequirements(repo))
|
|
|
if noremovereqs:
|
|
|
raise error.Abort(_('cannot upgrade repository; requirement would be '
|
|
|
'removed: %s') % _(', ').join(sorted(noremovereqs)))
|
|
|
|
|
|
noaddreqs = (newreqs - repo.requirements -
|
|
|
allowednewrequirements(repo))
|
|
|
if noaddreqs:
|
|
|
raise error.Abort(_('cannot upgrade repository; do not support adding '
|
|
|
'requirement: %s') %
|
|
|
_(', ').join(sorted(noaddreqs)))
|
|
|
|
|
|
unsupportedreqs = newreqs - supporteddestrequirements(repo)
|
|
|
if unsupportedreqs:
|
|
|
raise error.Abort(_('cannot upgrade repository; do not support '
|
|
|
'destination requirement: %s') %
|
|
|
_(', ').join(sorted(unsupportedreqs)))
|
|
|
|
|
|
# Find and validate all improvements that can be made.
|
|
|
alloptimizations = findoptimizations(repo)
|
|
|
|
|
|
# Apply and Validate arguments.
|
|
|
optimizations = []
|
|
|
for o in alloptimizations:
|
|
|
if o.name in optimize:
|
|
|
optimizations.append(o)
|
|
|
optimize.discard(o.name)
|
|
|
|
|
|
if optimize: # anything left is unknown
|
|
|
raise error.Abort(_('unknown optimization action requested: %s') %
|
|
|
', '.join(sorted(optimize)),
|
|
|
hint=_('run without arguments to see valid '
|
|
|
'optimizations'))
|
|
|
|
|
|
deficiencies = finddeficiencies(repo)
|
|
|
actions = determineactions(repo, deficiencies, repo.requirements, newreqs)
|
|
|
actions.extend(o for o in sorted(optimizations)
|
|
|
# determineactions could have added optimisation
|
|
|
if o not in actions)
|
|
|
|
|
|
def printrequirements():
|
|
|
ui.write(_('requirements\n'))
|
|
|
ui.write(_(' preserved: %s\n') %
|
|
|
_(', ').join(sorted(newreqs & repo.requirements)))
|
|
|
|
|
|
if repo.requirements - newreqs:
|
|
|
ui.write(_(' removed: %s\n') %
|
|
|
_(', ').join(sorted(repo.requirements - newreqs)))
|
|
|
|
|
|
if newreqs - repo.requirements:
|
|
|
ui.write(_(' added: %s\n') %
|
|
|
_(', ').join(sorted(newreqs - repo.requirements)))
|
|
|
|
|
|
ui.write('\n')
|
|
|
|
|
|
def printupgradeactions():
|
|
|
for a in actions:
|
|
|
ui.write('%s\n %s\n\n' % (a.name, a.upgrademessage))
|
|
|
|
|
|
if not run:
|
|
|
fromconfig = []
|
|
|
onlydefault = []
|
|
|
|
|
|
for d in deficiencies:
|
|
|
if d.fromconfig(repo):
|
|
|
fromconfig.append(d)
|
|
|
elif d.default:
|
|
|
onlydefault.append(d)
|
|
|
|
|
|
if fromconfig or onlydefault:
|
|
|
|
|
|
if fromconfig:
|
|
|
ui.write(_('repository lacks features recommended by '
|
|
|
'current config options:\n\n'))
|
|
|
for i in fromconfig:
|
|
|
ui.write('%s\n %s\n\n' % (i.name, i.description))
|
|
|
|
|
|
if onlydefault:
|
|
|
ui.write(_('repository lacks features used by the default '
|
|
|
'config options:\n\n'))
|
|
|
for i in onlydefault:
|
|
|
ui.write('%s\n %s\n\n' % (i.name, i.description))
|
|
|
|
|
|
ui.write('\n')
|
|
|
else:
|
|
|
ui.write(_('(no feature deficiencies found in existing '
|
|
|
'repository)\n'))
|
|
|
|
|
|
ui.write(_('performing an upgrade with "--run" will make the following '
|
|
|
'changes:\n\n'))
|
|
|
|
|
|
printrequirements()
|
|
|
printupgradeactions()
|
|
|
|
|
|
unusedoptimize = [i for i in alloptimizations if i not in actions]
|
|
|
|
|
|
if unusedoptimize:
|
|
|
ui.write(_('additional optimizations are available by specifying '
|
|
|
'"--optimize <name>":\n\n'))
|
|
|
for i in unusedoptimize:
|
|
|
ui.write(_('%s\n %s\n\n') % (i.name, i.description))
|
|
|
return
|
|
|
|
|
|
# Else we're in the run=true case.
|
|
|
ui.write(_('upgrade will perform the following actions:\n\n'))
|
|
|
printrequirements()
|
|
|
printupgradeactions()
|
|
|
|
|
|
upgradeactions = [a.name for a in actions]
|
|
|
|
|
|
ui.write(_('beginning upgrade...\n'))
|
|
|
with repo.wlock(), repo.lock():
|
|
|
ui.write(_('repository locked and read-only\n'))
|
|
|
# Our strategy for upgrading the repository is to create a new,
|
|
|
# temporary repository, write data to it, then do a swap of the
|
|
|
# data. There are less heavyweight ways to do this, but it is easier
|
|
|
# to create a new repo object than to instantiate all the components
|
|
|
# (like the store) separately.
|
|
|
tmppath = tempfile.mkdtemp(prefix='upgrade.', dir=repo.path)
|
|
|
backuppath = None
|
|
|
try:
|
|
|
ui.write(_('creating temporary repository to stage migrated '
|
|
|
'data: %s\n') % tmppath)
|
|
|
|
|
|
# clone ui without using ui.copy because repo.ui is protected
|
|
|
repoui = repo.ui.__class__(repo.ui)
|
|
|
dstrepo = hg.repository(repoui, path=tmppath, create=True)
|
|
|
|
|
|
with dstrepo.wlock(), dstrepo.lock():
|
|
|
backuppath = _upgraderepo(ui, repo, dstrepo, newreqs,
|
|
|
upgradeactions)
|
|
|
|
|
|
finally:
|
|
|
ui.write(_('removing temporary repository %s\n') % tmppath)
|
|
|
repo.vfs.rmtree(tmppath, forcibly=True)
|
|
|
|
|
|
if backuppath:
|
|
|
ui.warn(_('copy of old repository backed up at %s\n') %
|
|
|
backuppath)
|
|
|
ui.warn(_('the old repository will not be deleted; remove '
|
|
|
'it to free up disk space once the upgraded '
|
|
|
'repository is verified\n'))
|
|
|
|
