Mercurial > hg
view mercurial/strip.py @ 47072:4c041c71ec01
revlog: introduce an explicit tracking of what the revlog is about
Since the dawn of time, people have been forced to rely to lossy introspection
of the index filename to determine what the purpose and role of the revlog they
encounter is. This is hacky, error prone, inflexible, abstraction-leaky,
<insert-your-own-complaints-here>.
In f63299ee7e4d Raphaël introduced a new attribute to track this information:
`revlog_kind`. However it is initialized in an odd place and various instances
end up not having it set. In addition is only tracking some of the information
we end up having to introspect in various pieces of code.
So we add a new attribute that holds more data and is more strictly enforced.
This work is done in collaboration with Raphaël.
The `revlog_kind` one will be removed/adapted in the next changeset. We expect
to be able to clean up various existing piece of code and to simplify coming
work around the newer revlog format.
Differential Revision: https://phab.mercurial-scm.org/D10352
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 06 Apr 2021 05:20:24 +0200 |
parents | d55b71393907 |
children | 97c5d1c22489 |
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from __future__ import absolute_import from .i18n import _ from .pycompat import getattr from . import ( bookmarks as bookmarksmod, cmdutil, error, hg, lock as lockmod, mergestate as mergestatemod, pycompat, registrar, repair, scmutil, util, ) release = lockmod.release cmdtable = {} command = registrar.command(cmdtable) def checklocalchanges(repo, force=False): s = repo.status() if not force: cmdutil.checkunfinished(repo) cmdutil.bailifchanged(repo) else: cmdutil.checkunfinished(repo, skipmerge=True) return s def _findupdatetarget(repo, nodes): unode, p2 = repo.changelog.parents(nodes[0]) currentbranch = repo[None].branch() if ( util.safehasattr(repo, b'mq') and p2 != repo.nullid and p2 in [x.node for x in repo.mq.applied] ): unode = p2 elif currentbranch != repo[unode].branch(): pwdir = b'parents(wdir())' revset = b'max(((parents(%ln::%r) + %r) - %ln::%r) and branch(%s))' branchtarget = repo.revs( revset, nodes, pwdir, pwdir, nodes, pwdir, currentbranch ) if branchtarget: cl = repo.changelog unode = cl.node(branchtarget.first()) return unode def strip( ui, repo, revs, update=True, backup=True, force=None, bookmarks=None, soft=False, ): with repo.wlock(), repo.lock(): if update: checklocalchanges(repo, force=force) urev = _findupdatetarget(repo, revs) hg.clean(repo, urev) repo.dirstate.write(repo.currenttransaction()) if soft: repair.softstrip(ui, repo, revs, backup) else: repair.strip(ui, repo, revs, backup) repomarks = repo._bookmarks if bookmarks: with repo.transaction(b'strip') as tr: if repo._activebookmark in bookmarks: bookmarksmod.deactivate(repo) repomarks.applychanges(repo, tr, [(b, None) for b in bookmarks]) for bookmark in sorted(bookmarks): ui.write(_(b"bookmark '%s' deleted\n") % bookmark) @command( b"debugstrip", [ ( b'r', b'rev', [], _( b'strip specified revision (optional, ' b'can specify revisions without this ' b'option)' ), _(b'REV'), ), ( b'f', b'force', None, _( b'force removal of changesets, discard ' b'uncommitted changes (no backup)' ), ), (b'', b'no-backup', None, _(b'do not save backup bundle')), ( b'', b'nobackup', None, _(b'do not save backup bundle (DEPRECATED)'), ), (b'n', b'', None, _(b'ignored (DEPRECATED)')), ( b'k', b'keep', None, _(b"do not modify working directory during strip"), ), ( b'B', b'bookmark', [], _(b"remove revs only reachable from given bookmark"), _(b'BOOKMARK'), ), ( b'', b'soft', None, _(b"simply drop changesets from visible history (EXPERIMENTAL)"), ), ], _(b'hg debugstrip [-k] [-f] [-B bookmark] [-r] REV...'), helpcategory=command.CATEGORY_MAINTENANCE, ) def debugstrip(ui, repo, *revs, **opts): """strip changesets and all their descendants from the repository The strip command removes the specified changesets and all their descendants. If the working directory has uncommitted changes, the operation is aborted unless the --force flag is supplied, in which case changes will be discarded. If a parent of the working directory is stripped, then the working directory will automatically be updated to the most recent available ancestor of the stripped parent after the operation completes. Any stripped changesets are stored in ``.hg/strip-backup`` as a bundle (see :hg:`help bundle` and :hg:`help unbundle`). They can be restored by running :hg:`unbundle .hg/strip-backup/BUNDLE`, where BUNDLE is the bundle file created by the strip. Note that the local revision numbers will in general be different after the restore. Use the --no-backup option to discard the backup bundle once the operation completes. Strip is not a history-rewriting operation and can be used on changesets in the public phase. But if the stripped changesets have been pushed to a remote repository you will likely pull them again. Return 0 on success. """ opts = pycompat.byteskwargs(opts) backup = True if opts.get(b'no_backup') or opts.get(b'nobackup'): backup = False cl = repo.changelog revs = list(revs) + opts.get(b'rev') revs = set(scmutil.revrange(repo, revs)) with repo.wlock(): bookmarks = set(opts.get(b'bookmark')) if bookmarks: repomarks = repo._bookmarks if not bookmarks.issubset(repomarks): raise error.Abort( _(b"bookmark '%s' not found") % b','.join(sorted(bookmarks - set(repomarks.keys()))) ) # If the requested bookmark is not the only one pointing to a # a revision we have to only delete the bookmark and not strip # anything. revsets cannot detect that case. nodetobookmarks = {} for mark, node in pycompat.iteritems(repomarks): nodetobookmarks.setdefault(node, []).append(mark) for marks in nodetobookmarks.values(): if bookmarks.issuperset(marks): rsrevs = scmutil.bookmarkrevs(repo, marks[0]) revs.update(set(rsrevs)) if not revs: with repo.lock(), repo.transaction(b'bookmark') as tr: bmchanges = [(b, None) for b in bookmarks] repomarks.applychanges(repo, tr, bmchanges) for bookmark in sorted(bookmarks): ui.write(_(b"bookmark '%s' deleted\n") % bookmark) if not revs: raise error.Abort(_(b'empty revision set')) descendants = set(cl.descendants(revs)) strippedrevs = revs.union(descendants) roots = revs.difference(descendants) # if one of the wdir parent is stripped we'll need # to update away to an earlier revision update = any( p != repo.nullid and cl.rev(p) in strippedrevs for p in repo.dirstate.parents() ) rootnodes = {cl.node(r) for r in roots} q = getattr(repo, 'mq', None) if q is not None and q.applied: # refresh queue state if we're about to strip # applied patches if cl.rev(repo.lookup(b'qtip')) in strippedrevs: q.applieddirty = True start = 0 end = len(q.applied) for i, statusentry in enumerate(q.applied): if statusentry.node in rootnodes: # if one of the stripped roots is an applied # patch, only part of the queue is stripped start = i break del q.applied[start:end] q.savedirty() revs = sorted(rootnodes) if update and opts.get(b'keep'): urev = _findupdatetarget(repo, revs) uctx = repo[urev] # only reset the dirstate for files that would actually change # between the working context and uctx descendantrevs = repo.revs(b"only(., %d)", uctx.rev()) changedfiles = [] for rev in descendantrevs: # blindly reset the files, regardless of what actually changed changedfiles.extend(repo[rev].files()) # reset files that only changed in the dirstate too dirstate = repo.dirstate dirchanges = [f for f in dirstate if dirstate[f] != b'n'] changedfiles.extend(dirchanges) repo.dirstate.rebuild(urev, uctx.manifest(), changedfiles) repo.dirstate.write(repo.currenttransaction()) # clear resolve state mergestatemod.mergestate.clean(repo) update = False strip( ui, repo, revs, backup=backup, update=update, force=opts.get(b'force'), bookmarks=bookmarks, soft=opts[b'soft'], ) return 0