Mercurial > hg
view mercurial/upgrade_utils/engine.py @ 50896:b2b8c25f9462
hgwebmod: use sysstr to check for attribute presence
We do not need bytes here.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Wed, 30 Aug 2023 13:28:09 +0200 |
parents | e06d1a779eb6 |
children | 18c8c18993f0 |
line wrap: on
line source
# 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. import stat from ..i18n import _ from ..pycompat import getattr from .. import ( error, metadata, pycompat, requirements, scmutil, store, util, vfs as vfsmod, ) from ..revlogutils import ( constants as revlogconst, flagutil, nodemap, sidedata as sidedatamod, ) from . import actions as upgrade_actions def get_sidedata_helpers(srcrepo, dstrepo): use_w = srcrepo.ui.configbool(b'experimental', b'worker.repository-upgrade') sequential = pycompat.iswindows or not use_w if not sequential: srcrepo.register_sidedata_computer( revlogconst.KIND_CHANGELOG, sidedatamod.SD_FILES, (sidedatamod.SD_FILES,), metadata._get_worker_sidedata_adder(srcrepo, dstrepo), flagutil.REVIDX_HASCOPIESINFO, replace=True, ) return sidedatamod.get_sidedata_helpers(srcrepo, dstrepo._wanted_sidedata) def _copyrevlog(tr, destrepo, oldrl, entry): """copy all relevant files for `oldrl` into `destrepo` store Files are copied "as is" without any transformation. The copy is performed without extra checks. Callers are responsible for making sure the copied content is compatible with format of the destination repository. """ oldrl = getattr(oldrl, '_revlog', oldrl) newrl = entry.get_revlog_instance(destrepo) newrl = getattr(newrl, '_revlog', newrl) oldvfs = oldrl.opener newvfs = newrl.opener oldindex = oldvfs.join(oldrl._indexfile) newindex = newvfs.join(newrl._indexfile) olddata = oldvfs.join(oldrl._datafile) newdata = newvfs.join(newrl._datafile) with newvfs(newrl._indexfile, b'w'): pass # create all the directories util.copyfile(oldindex, newindex) copydata = oldrl.opener.exists(oldrl._datafile) if copydata: util.copyfile(olddata, newdata) if entry.is_filelog: unencodedname = entry.main_file_path() destrepo.svfs.fncache.add(unencodedname) if copydata: destrepo.svfs.fncache.add(unencodedname[:-2] + b'.d') UPGRADE_CHANGELOG = b"changelog" UPGRADE_MANIFEST = b"manifest" UPGRADE_FILELOGS = b"all-filelogs" UPGRADE_ALL_REVLOGS = frozenset( [UPGRADE_CHANGELOG, UPGRADE_MANIFEST, UPGRADE_FILELOGS] ) def matchrevlog(revlogfilter, entry): """check if a revlog is selected for cloning. In other words, are there any updates which need to be done on revlog or it can be blindly copied. The store entry is checked against the passed filter""" if entry.is_changelog: return UPGRADE_CHANGELOG in revlogfilter elif entry.is_manifestlog: return UPGRADE_MANIFEST in revlogfilter assert entry.is_filelog return UPGRADE_FILELOGS in revlogfilter def _perform_clone( ui, dstrepo, tr, old_revlog, entry, upgrade_op, sidedata_helpers, oncopiedrevision, ): """returns the new revlog object created""" newrl = None revlog_path = entry.main_file_path() if matchrevlog(upgrade_op.revlogs_to_process, entry): ui.note( _(b'cloning %d revisions from %s\n') % (len(old_revlog), revlog_path) ) newrl = entry.get_revlog_instance(dstrepo) old_revlog.clone( tr, newrl, addrevisioncb=oncopiedrevision, deltareuse=upgrade_op.delta_reuse_mode, forcedeltabothparents=upgrade_op.force_re_delta_both_parents, sidedata_helpers=sidedata_helpers, ) else: msg = _(b'blindly copying %s containing %i revisions\n') ui.note(msg % (revlog_path, len(old_revlog))) _copyrevlog(tr, dstrepo, old_revlog, entry) newrl = entry.get_revlog_instance(dstrepo) return newrl def _clonerevlogs( ui, srcrepo, dstrepo, tr, upgrade_op, ): """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 alldatafiles = list(srcrepo.store.walk()) # mapping of data files which needs to be cloned # key is unencoded filename # value is revlog_object_from_srcrepo manifests = {} changelogs = {} filelogs = {} # Perform a pass to collect metadata. This validates we can open all # source files and allows a unified progress bar to be displayed. for entry in alldatafiles: if not entry.is_revlog: continue rl = entry.get_revlog_instance(srcrepo) info = rl.storageinfo( exclusivefiles=True, revisionscount=True, trackedsize=True, storedsize=True, ) revcount += info[b'revisionscount'] or 0 datasize = info[b'storedsize'] or 0 rawsize = info[b'trackedsize'] or 0 srcsize += datasize srcrawsize += rawsize # This is for the separate progress bars. if entry.is_changelog: changelogs[entry.target_id] = entry crevcount += len(rl) csrcsize += datasize crawsize += rawsize elif entry.is_manifestlog: manifests[entry.target_id] = entry mcount += 1 mrevcount += len(rl) msrcsize += datasize mrawsize += rawsize elif entry.is_filelog: filelogs[entry.target_id] = entry fcount += 1 frevcount += len(rl) fsrcsize += datasize frawsize += rawsize else: error.ProgrammingError(b'unknown revlog type') if not revcount: return ui.status( _( b'migrating %d total revisions (%d in filelogs, %d in manifests, ' b'%d in changelog)\n' ) % (revcount, frevcount, mrevcount, crevcount) ) ui.status( _(b'migrating %s in store; %s tracked data\n') % ((util.bytecount(srcsize), util.bytecount(srcrawsize))) ) # Used to keep track of progress. progress = None def oncopiedrevision(rl, rev, node): progress.increment() sidedata_helpers = get_sidedata_helpers(srcrepo, dstrepo) # Migrating filelogs ui.status( _( b'migrating %d filelogs containing %d revisions ' b'(%s in store; %s tracked data)\n' ) % ( fcount, frevcount, util.bytecount(fsrcsize), util.bytecount(frawsize), ) ) progress = srcrepo.ui.makeprogress(_(b'file revisions'), total=frevcount) for target_id, entry in sorted(filelogs.items()): oldrl = entry.get_revlog_instance(srcrepo) newrl = _perform_clone( ui, dstrepo, tr, oldrl, entry, upgrade_op, sidedata_helpers, oncopiedrevision, ) info = newrl.storageinfo(storedsize=True) fdstsize += info[b'storedsize'] or 0 ui.status( _( b'finished migrating %d filelog revisions across %d ' b'filelogs; change in size: %s\n' ) % (frevcount, fcount, util.bytecount(fdstsize - fsrcsize)) ) # Migrating manifests ui.status( _( b'migrating %d manifests containing %d revisions ' b'(%s in store; %s tracked data)\n' ) % ( mcount, mrevcount, util.bytecount(msrcsize), util.bytecount(mrawsize), ) ) if progress: progress.complete() progress = srcrepo.ui.makeprogress( _(b'manifest revisions'), total=mrevcount ) for target_id, entry in sorted(manifests.items()): oldrl = entry.get_revlog_instance(srcrepo) newrl = _perform_clone( ui, dstrepo, tr, oldrl, entry, upgrade_op, sidedata_helpers, oncopiedrevision, ) info = newrl.storageinfo(storedsize=True) mdstsize += info[b'storedsize'] or 0 ui.status( _( b'finished migrating %d manifest revisions across %d ' b'manifests; change in size: %s\n' ) % (mrevcount, mcount, util.bytecount(mdstsize - msrcsize)) ) # Migrating changelog ui.status( _( b'migrating changelog containing %d revisions ' b'(%s in store; %s tracked data)\n' ) % ( crevcount, util.bytecount(csrcsize), util.bytecount(crawsize), ) ) if progress: progress.complete() progress = srcrepo.ui.makeprogress( _(b'changelog revisions'), total=crevcount ) for target_id, entry in sorted(changelogs.items()): oldrl = entry.get_revlog_instance(srcrepo) newrl = _perform_clone( ui, dstrepo, tr, oldrl, entry, upgrade_op, sidedata_helpers, oncopiedrevision, ) info = newrl.storageinfo(storedsize=True) cdstsize += info[b'storedsize'] or 0 progress.complete() ui.status( _( b'finished migrating %d changelog revisions; change in size: ' b'%s\n' ) % (crevcount, util.bytecount(cdstsize - csrcsize)) ) dstsize = fdstsize + mdstsize + cdstsize ui.status( _( b'finished migrating %d total revisions; total change in store ' b'size: %s\n' ) % (revcount, util.bytecount(dstsize - srcsize)) ) def _files_to_copy_post_revlog_clone(srcrepo): """yields files which should be copied to destination after revlogs are cloned""" for path, kind, st in sorted(srcrepo.store.vfs.readdir(b'', stat=True)): # don't copy revlogs as they are already cloned if store.is_revlog_file(path): continue # Skip transaction related files. if path.startswith(b'undo'): continue # Only copy regular files. if kind != stat.S_IFREG: continue # Skip other skipped files. if path in (b'lock', b'fncache'): continue # TODO: should we skip cache too? yield path def _replacestores(currentrepo, upgradedrepo, backupvfs, upgrade_op): """Replace the stores after current repository is upgraded Creates a backup of current repository store at backup path Replaces upgraded store files in current repo from upgraded one Arguments: currentrepo: repo object of current repository upgradedrepo: repo object of the upgraded data backupvfs: vfs object for the backup path upgrade_op: upgrade operation object to be used to decide what all is upgraded """ # TODO: don't blindly rename everything in store # There can be upgrades where store is not touched at all if upgrade_op.backup_store: util.rename(currentrepo.spath, backupvfs.join(b'store')) else: currentrepo.vfs.rmtree(b'store', forcibly=True) util.rename(upgradedrepo.spath, currentrepo.spath) 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 upgrade(ui, srcrepo, dstrepo, upgrade_op): """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() backuppath = None backupvfs = None ui.status( _( b'(it is safe to interrupt this process any time before ' b'data migration completes)\n' ) ) if upgrade_actions.dirstatev2 in upgrade_op.upgrade_actions: ui.status(_(b'upgrading to dirstate-v2 from v1\n')) upgrade_dirstate(ui, srcrepo, upgrade_op, b'v1', b'v2') upgrade_op.upgrade_actions.remove(upgrade_actions.dirstatev2) if upgrade_actions.dirstatev2 in upgrade_op.removed_actions: ui.status(_(b'downgrading from dirstate-v2 to v1\n')) upgrade_dirstate(ui, srcrepo, upgrade_op, b'v2', b'v1') upgrade_op.removed_actions.remove(upgrade_actions.dirstatev2) if upgrade_actions.dirstatetrackedkey in upgrade_op.upgrade_actions: ui.status(_(b'create dirstate-tracked-hint file\n')) upgrade_tracked_hint(ui, srcrepo, upgrade_op, add=True) upgrade_op.upgrade_actions.remove(upgrade_actions.dirstatetrackedkey) elif upgrade_actions.dirstatetrackedkey in upgrade_op.removed_actions: ui.status(_(b'remove dirstate-tracked-hint file\n')) upgrade_tracked_hint(ui, srcrepo, upgrade_op, add=False) upgrade_op.removed_actions.remove(upgrade_actions.dirstatetrackedkey) if not (upgrade_op.upgrade_actions or upgrade_op.removed_actions): return if upgrade_op.requirements_only: ui.status(_(b'upgrading repository requirements\n')) scmutil.writereporequirements(srcrepo, upgrade_op.new_requirements) # if there is only one action and that is persistent nodemap upgrade # directly write the nodemap file and update requirements instead of going # through the whole cloning process elif ( len(upgrade_op.upgrade_actions) == 1 and b'persistent-nodemap' in upgrade_op.upgrade_actions_names and not upgrade_op.removed_actions ): ui.status( _(b'upgrading repository to use persistent nodemap feature\n') ) with srcrepo.transaction(b'upgrade') as tr: unfi = srcrepo.unfiltered() cl = unfi.changelog nodemap.persist_nodemap(tr, cl, force=True) # we want to directly operate on the underlying revlog to force # create a nodemap file. This is fine since this is upgrade code # and it heavily relies on repository being revlog based # hence accessing private attributes can be justified nodemap.persist_nodemap( tr, unfi.manifestlog._rootstore._revlog, force=True ) scmutil.writereporequirements(srcrepo, upgrade_op.new_requirements) elif ( len(upgrade_op.removed_actions) == 1 and [ x for x in upgrade_op.removed_actions if x.name == b'persistent-nodemap' ] and not upgrade_op.upgrade_actions ): ui.status( _(b'downgrading repository to not use persistent nodemap feature\n') ) with srcrepo.transaction(b'upgrade') as tr: unfi = srcrepo.unfiltered() cl = unfi.changelog nodemap.delete_nodemap(tr, srcrepo, cl) # check comment 20 lines above for accessing private attributes nodemap.delete_nodemap( tr, srcrepo, unfi.manifestlog._rootstore._revlog ) scmutil.writereporequirements(srcrepo, upgrade_op.new_requirements) else: with dstrepo.transaction(b'upgrade') as tr: _clonerevlogs( ui, srcrepo, dstrepo, tr, upgrade_op, ) # Now copy other files in the store directory. for p in _files_to_copy_post_revlog_clone(srcrepo): srcrepo.ui.status(_(b'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.status(_(b'data fully upgraded in a temporary repository\n')) if upgrade_op.backup_store: backuppath = pycompat.mkdtemp( prefix=b'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(b'requires'), backupvfs.join(b'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.status( _( b'marking source repository as being upgraded; clients will be ' b'unable to read from repository\n' ) ) scmutil.writereporequirements( srcrepo, srcrepo.requirements | {b'upgradeinprogress'} ) ui.status(_(b'starting in-place swap of repository data\n')) if upgrade_op.backup_store: ui.status( _(b'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.status(_(b'replacing store...\n')) tstart = util.timer() _replacestores(srcrepo, dstrepo, backupvfs, upgrade_op) elapsed = util.timer() - tstart ui.status( _( b'store replacement complete; repository was inconsistent for ' b'%0.1fs\n' ) % elapsed ) # We first write the requirements file. Any new requirements will lock # out legacy clients. ui.status( _( b'finalizing requirements file and making repository readable ' b'again\n' ) ) scmutil.writereporequirements(srcrepo, upgrade_op.new_requirements) if upgrade_op.backup_store: # 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. assert backupvfs is not None # help pytype backupvfs.unlink(b'store/lock') return backuppath def upgrade_dirstate(ui, srcrepo, upgrade_op, old, new): if upgrade_op.backup_store: backuppath = pycompat.mkdtemp( prefix=b'upgradebackup.', dir=srcrepo.path ) ui.status(_(b'replaced files will be backed up at %s\n') % backuppath) backupvfs = vfsmod.vfs(backuppath) util.copyfile( srcrepo.vfs.join(b'requires'), backupvfs.join(b'requires') ) try: util.copyfile( srcrepo.vfs.join(b'dirstate'), backupvfs.join(b'dirstate') ) except FileNotFoundError: # The dirstate does not exist on an empty repo or a repo with no # revision checked out pass assert srcrepo.dirstate._use_dirstate_v2 == (old == b'v2') use_v2 = new == b'v2' if use_v2: # Write the requirements *before* upgrading scmutil.writereporequirements(srcrepo, upgrade_op.new_requirements) srcrepo.dirstate._map.preload() srcrepo.dirstate._use_dirstate_v2 = use_v2 srcrepo.dirstate._map._use_dirstate_v2 = use_v2 srcrepo.dirstate._dirty = True try: srcrepo.vfs.unlink(b'dirstate') except FileNotFoundError: # The dirstate does not exist on an empty repo or a repo with no # revision checked out pass srcrepo.dirstate.write(None) if not use_v2: # Remove the v2 requirement *after* downgrading scmutil.writereporequirements(srcrepo, upgrade_op.new_requirements) def upgrade_tracked_hint(ui, srcrepo, upgrade_op, add): if add: srcrepo.dirstate._use_tracked_hint = True srcrepo.dirstate._dirty = True srcrepo.dirstate._dirty_tracked_set = True srcrepo.dirstate.write(None) if not add: srcrepo.dirstate.delete_tracked_hint() scmutil.writereporequirements(srcrepo, upgrade_op.new_requirements)