hgext/strip.py
author Manuel Jacob <me@manueljacob.de>
Mon, 29 Jun 2020 15:03:36 +0200
branchstable
changeset 45022 e3b19004087a
parent 44452 9d2b2df2c2ba
child 44856 b7808443ed6a
permissions -rw-r--r--
convert: correctly convert paths to UTF-8 for Subversion The previous code using encoding.tolocal() only worked by chance in these situations: * The string is ASCII: The fast path was triggered and the string was returned unmodified. * The local encoding is UTF-8: The source and target encoding is the same. * The string is not valid UTF-8 and the native encoding is ISO-8859-1: If the string doesn’t decode using UTF-8, ISO-8859-1 is tried as a fallback. During `hg convert`, the local encoding is always UTF-8. The irony is that in this case, encoding.tolocal() behaves like what someone would expect the reverse function, encoding.fromlocal(), to do. When the locale encoding is ISO-8859-15, trying to convert a SVN repo `/tmp/a€` failed before like this: file:///tmp/a%C2%A4 does not look like a Subversion repository to libsvn version 1.14.0 The correct URL is `file:///tmp/a%E2%82%AC`. Unlike previously (with the ISO-8859-1 fallback), decoding the path using the locale encoding can fail. In this case, we have to bail out, as Subversion won’t be able to do anything useful with the path.
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"""strip changesets and their descendants from history
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This extension allows you to strip changesets and all their descendants from the
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repository. See the command help for details.
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"""
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from __future__ import absolute_import
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from mercurial.i18n import _
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from mercurial.pycompat import getattr
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from mercurial import (
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    bookmarks as bookmarksmod,
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    cmdutil,
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    error,
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    hg,
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    lock as lockmod,
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    merge,
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    node as nodemod,
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    pycompat,
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    registrar,
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    repair,
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    scmutil,
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    util,
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)
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nullid = nodemod.nullid
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release = lockmod.release
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cmdtable = {}
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command = registrar.command(cmdtable)
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# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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# be specifying the version(s) of Mercurial they are tested with, or
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# leave the attribute unspecified.
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testedwith = b'ships-with-hg-core'
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def checklocalchanges(repo, force=False):
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    s = repo.status()
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    if not force:
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        cmdutil.checkunfinished(repo)
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        cmdutil.bailifchanged(repo)
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    else:
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        cmdutil.checkunfinished(repo, skipmerge=True)
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    return s
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def _findupdatetarget(repo, nodes):
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    unode, p2 = repo.changelog.parents(nodes[0])
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    currentbranch = repo[None].branch()
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    if (
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        util.safehasattr(repo, b'mq')
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        and p2 != nullid
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        and p2 in [x.node for x in repo.mq.applied]
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    ):
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        unode = p2
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    elif currentbranch != repo[unode].branch():
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        pwdir = b'parents(wdir())'
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        revset = b'max(((parents(%ln::%r) + %r) - %ln::%r) and branch(%s))'
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        branchtarget = repo.revs(
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            revset, nodes, pwdir, pwdir, nodes, pwdir, currentbranch
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        )
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        if branchtarget:
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            cl = repo.changelog
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            unode = cl.node(branchtarget.first())
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    return unode
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def strip(
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    ui,
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    repo,
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    revs,
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    update=True,
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    backup=True,
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    force=None,
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    bookmarks=None,
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    soft=False,
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):
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    with repo.wlock(), repo.lock():
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        if update:
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            checklocalchanges(repo, force=force)
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            urev = _findupdatetarget(repo, revs)
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            hg.clean(repo, urev)
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            repo.dirstate.write(repo.currenttransaction())
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        if soft:
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            repair.softstrip(ui, repo, revs, backup)
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        else:
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            repair.strip(ui, repo, revs, backup)
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        repomarks = repo._bookmarks
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        if bookmarks:
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            with repo.transaction(b'strip') as tr:
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                if repo._activebookmark in bookmarks:
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                    bookmarksmod.deactivate(repo)
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                repomarks.applychanges(repo, tr, [(b, None) for b in bookmarks])
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            for bookmark in sorted(bookmarks):
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                ui.write(_(b"bookmark '%s' deleted\n") % bookmark)
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@command(
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    b"strip",
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    [
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        (
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            b'r',
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            b'rev',
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            [],
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            _(
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                b'strip specified revision (optional, '
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                b'can specify revisions without this '
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                b'option)'
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            ),
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            _(b'REV'),
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        ),
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        (
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            b'f',
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            b'force',
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            None,
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            _(
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                b'force removal of changesets, discard '
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                b'uncommitted changes (no backup)'
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            ),
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        ),
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        (b'', b'no-backup', None, _(b'do not save backup bundle')),
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        (b'', b'nobackup', None, _(b'do not save backup bundle (DEPRECATED)'),),
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        (b'n', b'', None, _(b'ignored  (DEPRECATED)')),
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        (
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            b'k',
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            b'keep',
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            None,
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            _(b"do not modify working directory during strip"),
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        ),
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        (
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            b'B',
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            b'bookmark',
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            [],
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            _(b"remove revs only reachable from given bookmark"),
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            _(b'BOOKMARK'),
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        ),
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        (
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            b'',
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            b'soft',
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            None,
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            _(b"simply drop changesets from visible history (EXPERIMENTAL)"),
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        ),
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    ],
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    _(b'hg strip [-k] [-f] [-B bookmark] [-r] REV...'),
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    helpcategory=command.CATEGORY_MAINTENANCE,
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   151
)
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def stripcmd(ui, repo, *revs, **opts):
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    """strip changesets and all their descendants from the repository
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   154
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    The strip command removes the specified changesets and all their
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    descendants. If the working directory has uncommitted changes, the
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    operation is aborted unless the --force flag is supplied, in which
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    case changes will be discarded.
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   159
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    If a parent of the working directory is stripped, then the working
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    directory will automatically be updated to the most recent
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    available ancestor of the stripped parent after the operation
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    completes.
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   164
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    Any stripped changesets are stored in ``.hg/strip-backup`` as a
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   166
    bundle (see :hg:`help bundle` and :hg:`help unbundle`). They can
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   167
    be restored by running :hg:`unbundle .hg/strip-backup/BUNDLE`,
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    where BUNDLE is the bundle file created by the strip. Note that
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    the local revision numbers will in general be different after the
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    restore.
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   171
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    Use the --no-backup option to discard the backup bundle once the
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    operation completes.
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    Strip is not a history-rewriting operation and can be used on
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    changesets in the public phase. But if the stripped changesets have
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    been pushed to a remote repository you will likely pull them again.
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   178
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    Return 0 on success.
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    """
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    opts = pycompat.byteskwargs(opts)
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    backup = True
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    if opts.get(b'no_backup') or opts.get(b'nobackup'):
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        backup = False
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    cl = repo.changelog
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    revs = list(revs) + opts.get(b'rev')
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    revs = set(scmutil.revrange(repo, revs))
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   189
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    with repo.wlock():
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        bookmarks = set(opts.get(b'bookmark'))
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        if bookmarks:
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            repomarks = repo._bookmarks
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            if not bookmarks.issubset(repomarks):
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                raise error.Abort(
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   196
                    _(b"bookmark '%s' not found")
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                    % b','.join(sorted(bookmarks - set(repomarks.keys())))
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                )
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            # If the requested bookmark is not the only one pointing to a
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            # a revision we have to only delete the bookmark and not strip
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            # anything. revsets cannot detect that case.
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            nodetobookmarks = {}
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            for mark, node in pycompat.iteritems(repomarks):
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                nodetobookmarks.setdefault(node, []).append(mark)
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            for marks in nodetobookmarks.values():
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                if bookmarks.issuperset(marks):
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                    rsrevs = scmutil.bookmarkrevs(repo, marks[0])
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                    revs.update(set(rsrevs))
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            if not revs:
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   211
                with repo.lock(), repo.transaction(b'bookmark') as tr:
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                    bmchanges = [(b, None) for b in bookmarks]
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                    repomarks.applychanges(repo, tr, bmchanges)
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                for bookmark in sorted(bookmarks):
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   215
                    ui.write(_(b"bookmark '%s' deleted\n") % bookmark)
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        if not revs:
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            raise error.Abort(_(b'empty revision set'))
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   219
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        descendants = set(cl.descendants(revs))
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        strippedrevs = revs.union(descendants)
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   222
        roots = revs.difference(descendants)
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   223
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        # if one of the wdir parent is stripped we'll need
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        # to update away to an earlier revision
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        update = any(
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            p != nullid and cl.rev(p) in strippedrevs
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            for p in repo.dirstate.parents()
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   229
        )
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   230
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        rootnodes = {cl.node(r) for r in roots}
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   232
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        q = getattr(repo, 'mq', None)
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        if q is not None and q.applied:
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   235
            # refresh queue state if we're about to strip
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            # applied patches
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            if cl.rev(repo.lookup(b'qtip')) in strippedrevs:
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   238
                q.applieddirty = True
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   239
                start = 0
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                end = len(q.applied)
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                for i, statusentry in enumerate(q.applied):
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   242
                    if statusentry.node in rootnodes:
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   243
                        # if one of the stripped roots is an applied
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                        # patch, only part of the queue is stripped
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                        start = i
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                        break
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                del q.applied[start:end]
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                q.savedirty()
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        revs = sorted(rootnodes)
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        if update and opts.get(b'keep'):
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            urev = _findupdatetarget(repo, revs)
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            uctx = repo[urev]
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            # only reset the dirstate for files that would actually change
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            # between the working context and uctx
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            descendantrevs = repo.revs(b"%d::.", uctx.rev())
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            changedfiles = []
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            for rev in descendantrevs:
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                # blindly reset the files, regardless of what actually changed
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                changedfiles.extend(repo[rev].files())
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            # reset files that only changed in the dirstate too
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            dirstate = repo.dirstate
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            dirchanges = [f for f in dirstate if dirstate[f] != b'n']
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            changedfiles.extend(dirchanges)
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            repo.dirstate.rebuild(urev, uctx.manifest(), changedfiles)
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            repo.dirstate.write(repo.currenttransaction())
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            # clear resolve state
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            merge.mergestate.clean(repo, repo[b'.'].node())
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            update = False
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        strip(
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            ui,
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            repo,
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            revs,
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            backup=backup,
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            update=update,
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            force=opts.get(b'force'),
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            bookmarks=bookmarks,
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            soft=opts[b'soft'],
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        )
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    return 0