author | Yuya Nishihara <yuya@tcha.org> |
Sun, 21 Aug 2016 12:36:23 +0900 | |
changeset 29914 | 770128405002 |
parent 29841 | d5883fd055c6 |
child 31052 | 0332b8fafd05 |
permissions | -rw-r--r-- |
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# Copyright 2006, 2007 Matt Mackall <mpm@selenic.com> |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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'''share a common history between several working directories |
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Automatic Pooled Storage for Clones |
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----------------------------------- |
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When this extension is active, :hg:`clone` can be configured to |
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automatically share/pool storage across multiple clones. This |
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mode effectively converts :hg:`clone` to :hg:`clone` + :hg:`share`. |
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The benefit of using this mode is the automatic management of |
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store paths and intelligent pooling of related repositories. |
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The following ``share.`` config options influence this feature: |
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``share.pool`` |
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Filesystem path where shared repository data will be stored. When |
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defined, :hg:`clone` will automatically use shared repository |
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storage instead of creating a store inside each clone. |
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``share.poolnaming`` |
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How directory names in ``share.pool`` are constructed. |
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"identity" means the name is derived from the first changeset in the |
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repository. In this mode, different remotes share storage if their |
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root/initial changeset is identical. In this mode, the local shared |
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repository is an aggregate of all encountered remote repositories. |
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"remote" means the name is derived from the source repository's |
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path or URL. In this mode, storage is only shared if the path or URL |
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requested in the :hg:`clone` command matches exactly to a repository |
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that was cloned before. |
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The default naming mode is "identity." |
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''' |
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from __future__ import absolute_import |
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import errno |
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from mercurial.i18n import _ |
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from mercurial import ( |
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bookmarks, |
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cmdutil, |
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commands, |
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error, |
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extensions, |
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hg, |
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util, |
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) |
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repository = hg.repository |
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parseurl = hg.parseurl |
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cmdtable = {} |
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command = cmdutil.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 = 'ships-with-hg-core' |
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@command('share', |
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[('U', 'noupdate', None, _('do not create a working directory')), |
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('B', 'bookmarks', None, _('also share bookmarks'))], |
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_('[-U] [-B] SOURCE [DEST]'), |
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norepo=True) |
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def share(ui, source, dest=None, noupdate=False, bookmarks=False): |
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"""create a new shared repository |
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Initialize a new repository and working directory that shares its |
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history (and optionally bookmarks) with another repository. |
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.. note:: |
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using rollback or extensions that destroy/modify history (mq, |
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rebase, etc.) can cause considerable confusion with shared |
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clones. In particular, if two shared clones are both updated to |
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the same changeset, and one of them destroys that changeset |
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with rollback, the other clone will suddenly stop working: all |
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operations will fail with "abort: working directory has unknown |
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parent". The only known workaround is to use debugsetparents on |
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the broken clone to reset it to a changeset that still exists. |
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""" |
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return hg.share(ui, source, dest=dest, update=not noupdate, |
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bookmarks=bookmarks) |
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@command('unshare', [], '') |
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def unshare(ui, repo): |
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"""convert a shared repository to a normal one |
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Copy the store data to the repo and remove the sharedpath data. |
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""" |
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if not repo.shared(): |
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raise error.Abort(_("this is not a shared repo")) |
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destlock = lock = None |
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lock = repo.lock() |
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try: |
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# we use locks here because if we race with commit, we |
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# can end up with extra data in the cloned revlogs that's |
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# not pointed to by changesets, thus causing verify to |
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# fail |
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destlock = hg.copystore(ui, repo, repo.path) |
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sharefile = repo.join('sharedpath') |
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util.rename(sharefile, sharefile + '.old') |
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repo.requirements.discard('sharedpath') |
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repo._writerequirements() |
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finally: |
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destlock and destlock.release() |
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lock and lock.release() |
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# update store, spath, svfs and sjoin of repo |
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repo.unfiltered().__init__(repo.baseui, repo.root) |
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# Wrap clone command to pass auto share options. |
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def clone(orig, ui, source, *args, **opts): |
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pool = ui.config('share', 'pool', None) |
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if pool: |
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pool = util.expandpath(pool) |
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128 |
|
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opts['shareopts'] = dict( |
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pool=pool, |
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mode=ui.config('share', 'poolnaming', 'identity'), |
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132 |
) |
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|
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return orig(ui, source, *args, **opts) |
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135 |
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def extsetup(ui): |
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extensions.wrapfunction(bookmarks, '_getbkfile', getbkfile) |
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extensions.wrapfunction(bookmarks.bmstore, 'recordchange', recordchange) |
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extensions.wrapfunction(bookmarks.bmstore, '_writerepo', writerepo) |
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extensions.wrapcommand(commands.table, 'clone', clone) |
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141 |
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def _hassharedbookmarks(repo): |
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"""Returns whether this repo has shared bookmarks""" |
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try: |
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shared = repo.vfs.read('shared').splitlines() |
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except IOError as inst: |
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if inst.errno != errno.ENOENT: |
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raise |
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return False |
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return hg.sharedbookmarks in shared |
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151 |
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def _getsrcrepo(repo): |
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""" |
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Returns the source repository object for a given shared repository. |
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If repo is not a shared repository, return None. |
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""" |
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if repo.sharedpath == repo.path: |
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return None |
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if util.safehasattr(repo, 'srcrepo') and repo.srcrepo: |
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return repo.srcrepo |
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# the sharedpath always ends in the .hg; we want the path to the repo |
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source = repo.vfs.split(repo.sharedpath)[0] |
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srcurl, branches = parseurl(source) |
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srcrepo = repository(repo.ui, srcurl) |
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repo.srcrepo = srcrepo |
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return srcrepo |
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def getbkfile(orig, repo): |
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if _hassharedbookmarks(repo): |
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srcrepo = _getsrcrepo(repo) |
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if srcrepo is not None: |
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repo = srcrepo |
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return orig(repo) |
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def recordchange(orig, self, tr): |
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# Continue with write to local bookmarks file as usual |
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orig(self, tr) |
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if _hassharedbookmarks(self._repo): |
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srcrepo = _getsrcrepo(self._repo) |
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if srcrepo is not None: |
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category = 'share-bookmarks' |
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tr.addpostclose(category, lambda tr: self._writerepo(srcrepo)) |
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def writerepo(orig, self, repo): |
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# First write local bookmarks file in case we ever unshare |
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189 |
orig(self, repo) |
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190 |
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if _hassharedbookmarks(self._repo): |
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srcrepo = _getsrcrepo(self._repo) |
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if srcrepo is not None: |
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orig(self, srcrepo) |