Mercurial > hg
view mercurial/upgrade.py @ 46237:bc884e31b8c8
debuglock: rename flag names to better clarity
`--force-lock` sounds as if we are taking the lock however in reality it's the
opposite.
Differential Revision: https://phab.mercurial-scm.org/D9690
author | Pulkit Goyal <7895pulkit@gmail.com> |
---|---|
date | Fri, 08 Jan 2021 18:07:33 +0530 |
parents | eec47efe219d |
children | 9796cf108e4e |
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# 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 from .i18n import _ from . import ( error, hg, localrepo, lock as lockmod, pycompat, requirements as requirementsmod, scmutil, ) from .upgrade_utils import ( actions as upgrade_actions, engine as upgrade_engine, ) from .utils import ( stringutil, ) allformatvariant = upgrade_actions.allformatvariant def upgraderepo( ui, repo, run=False, optimize=None, backup=True, manifest=None, changelog=None, filelogs=None, ): """Upgrade a repository in place.""" if optimize is None: optimize = {} repo = repo.unfiltered() revlogs = set(upgrade_engine.UPGRADE_ALL_REVLOGS) specentries = ( (upgrade_engine.UPGRADE_CHANGELOG, changelog), (upgrade_engine.UPGRADE_MANIFEST, manifest), (upgrade_engine.UPGRADE_FILELOGS, filelogs), ) specified = [(y, x) for (y, x) in specentries if x is not None] if specified: # we have some limitation on revlogs to be recloned if any(x for y, x in specified): revlogs = set() for upgrade, enabled in specified: if enabled: revlogs.add(upgrade) else: # none are enabled for upgrade, __ in specified: revlogs.discard(upgrade) # Ensure the repository can be upgraded. upgrade_actions.check_source_requirements(repo) default_options = localrepo.defaultcreateopts(repo.ui) newreqs = localrepo.newreporequirements(repo.ui, default_options) newreqs.update(upgrade_actions.preservedrequirements(repo)) upgrade_actions.check_requirements_changes(repo, newreqs) # Find and validate all improvements that can be made. alloptimizations = upgrade_actions.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( _(b'unknown optimization action requested: %s') % b', '.join(sorted(optimize)), hint=_(b'run without arguments to see valid optimizations'), ) format_upgrades = upgrade_actions.find_format_upgrades(repo) up_actions = upgrade_actions.determine_upgrade_actions( repo, format_upgrades, optimizations, repo.requirements, newreqs ) removed_actions = upgrade_actions.find_format_downgrades(repo) removedreqs = repo.requirements - newreqs addedreqs = newreqs - repo.requirements if revlogs != upgrade_engine.UPGRADE_ALL_REVLOGS: incompatible = upgrade_actions.RECLONES_REQUIREMENTS & ( removedreqs | addedreqs ) if incompatible: msg = _( b'ignoring revlogs selection flags, format requirements ' b'change: %s\n' ) ui.warn(msg % b', '.join(sorted(incompatible))) revlogs = upgrade_engine.UPGRADE_ALL_REVLOGS upgrade_op = upgrade_actions.UpgradeOperation( ui, newreqs, repo.requirements, up_actions, removed_actions, revlogs, ) if not run: fromconfig = [] onlydefault = [] for d in format_upgrades: if d.fromconfig(repo): fromconfig.append(d) elif d.default: onlydefault.append(d) if fromconfig or onlydefault: if fromconfig: ui.status( _( b'repository lacks features recommended by ' b'current config options:\n\n' ) ) for i in fromconfig: ui.status(b'%s\n %s\n\n' % (i.name, i.description)) if onlydefault: ui.status( _( b'repository lacks features used by the default ' b'config options:\n\n' ) ) for i in onlydefault: ui.status(b'%s\n %s\n\n' % (i.name, i.description)) ui.status(b'\n') else: ui.status(_(b'(no format upgrades found in existing repository)\n')) ui.status( _( b'performing an upgrade with "--run" will make the following ' b'changes:\n\n' ) ) upgrade_op.print_requirements() upgrade_op.print_optimisations() upgrade_op.print_upgrade_actions() upgrade_op.print_affected_revlogs() if upgrade_op.unused_optimizations: ui.status( _( b'additional optimizations are available by specifying ' b'"--optimize <name>":\n\n' ) ) upgrade_op.print_unused_optimizations() return if not (upgrade_op.upgrade_actions or upgrade_op.removed_actions): ui.status(_(b'nothing to do\n')) return # Else we're in the run=true case. ui.write(_(b'upgrade will perform the following actions:\n\n')) upgrade_op.print_requirements() upgrade_op.print_optimisations() upgrade_op.print_upgrade_actions() upgrade_op.print_affected_revlogs() ui.status(_(b'beginning upgrade...\n')) with repo.wlock(), repo.lock(): ui.status(_(b'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 = pycompat.mkdtemp(prefix=b'upgrade.', dir=repo.path) backuppath = None try: ui.status( _( b'creating temporary repository to stage upgraded ' b'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 = upgrade_engine.upgrade( ui, repo, dstrepo, upgrade_op ) if not backup: ui.status( _(b'removing old repository content %s\n') % backuppath ) repo.vfs.rmtree(backuppath, forcibly=True) backuppath = None finally: ui.status(_(b'removing temporary repository %s\n') % tmppath) repo.vfs.rmtree(tmppath, forcibly=True) if backuppath and not ui.quiet: ui.warn( _(b'copy of old repository backed up at %s\n') % backuppath ) ui.warn( _( b'the old repository will not be deleted; remove ' b'it to free up disk space once the upgraded ' b'repository is verified\n' ) ) upgrade_op.print_post_op_messages() def upgrade_share_to_safe(ui, hgvfs, storevfs, current_requirements): """Upgrades a share to use share-safe mechanism""" wlock = None try: wlock = lockmod.trylock(ui, hgvfs, b'wlock', 0, 0) store_requirements = localrepo._readrequires(storevfs, False) # after upgrade, store requires will be shared, so lets find # the requirements which are not present in store and # write them to share's .hg/requires diffrequires = current_requirements - store_requirements # add share-safe requirement as it will mark the share as share-safe diffrequires.add(requirementsmod.SHARESAFE_REQUIREMENT) scmutil.writerequires(hgvfs, diffrequires) current_requirements.add(requirementsmod.SHARESAFE_REQUIREMENT) ui.warn(_(b'repository upgraded to use share-safe mode\n')) except error.LockError as e: ui.warn( _(b'failed to upgrade share, got error: %s\n') % stringutil.forcebytestr(e.strerror) ) finally: if wlock: wlock.release() def downgrade_share_to_non_safe( ui, hgvfs, sharedvfs, current_requirements, ): """Downgrades a share which use share-safe to not use it""" wlock = None try: wlock = lockmod.trylock(ui, hgvfs, b'wlock', 0, 0) source_requirements = localrepo._readrequires(sharedvfs, True) # we cannot be 100% sure on which requirements were present in store when # the source supported share-safe. However, we do know that working # directory requirements were not there. Hence we remove them source_requirements -= requirementsmod.WORKING_DIR_REQUIREMENTS current_requirements |= source_requirements current_requirements.remove(requirementsmod.SHARESAFE_REQUIREMENT) scmutil.writerequires(hgvfs, current_requirements) ui.warn(_(b'repository downgraded to not use share-safe mode\n')) except error.LockError as e: # raise error right away because if downgrade failed, we cannot load # the repository because it does not have complete set of requirements raise error.Abort( _(b'failed to downgrade share, got error: %s') % stringutil.forcebytestr(e.strerror) ) finally: if wlock: wlock.release()