author | Pierre-Yves David <pierre-yves.david@logilab.fr> |
Fri, 17 Feb 2012 17:55:12 +0100 | |
changeset 136 | 915728be8afd |
parent 135 | 1a08daef8a53 |
child 143 | 0599fb01dc41 |
permissions | -rw-r--r-- |
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# obsolete.py - introduce the obsolete concept in mercurial. |
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# |
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# Copyright 2011 Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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# Logilab SA <contact@logilab.fr> |
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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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"""Introduce the Obsolete concept to mercurial |
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General concept |
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=============== |
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This extension introduces the *obsolete* concept. It adds a new *obsolete* |
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relation between two changesets. A relation ``<changeset B> obsolete <changeset |
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A>`` is set to denote that ``<changeset B>`` is new version of ``<changeset |
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A>``. |
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The *obsolete* relation act as a **perpendicular history** to the standard |
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changeset history. Standard changeset history versions files. The *obsolete* |
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relation versions changesets. |
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:obsolete: a changeset that have been replace by another one. |
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:unstable: a non-obsolet changeset based on another one. |
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:suspended: an obsolete changeset with unstable descendant. |
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:extinct: an obsolete changeset without unstable descendant |
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(subject to garbage collection) |
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Another name for unstable could be out of sync. |
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Usage and Feature |
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================= |
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Display and Exchange |
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.................... |
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obsolete changesets are hidden. (except if they have non obsolete changeset) |
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obsolete changesets are currently not exchange. This will probably change later |
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but it was the simpler solution for now. |
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New commands |
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............ |
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a ``debugobsolete`` command has been added. |
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It add an obsolete relation between too relation. |
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Context object |
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.............. |
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Context gain a ``obsolete`` method that return True if a changeset is obsolete |
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False otherwise. |
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revset |
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...... |
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Add an ``obsolete()`` entry. |
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repo extension |
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.............. |
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To Do |
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----- |
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* refuse to obsolete published changesets |
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* handle split |
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* handle conflict |
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* handle unstable // out of sync |
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""" |
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import os |
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try: |
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from cStringIO import StringIO |
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except ImportError: |
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from StringIO import StringIO |
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from mercurial.i18n import _ |
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import base64 |
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from mercurial import util |
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from mercurial import context |
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from mercurial import revset |
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from mercurial import scmutil |
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from mercurial import extensions |
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from mercurial import discovery |
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from mercurial import error |
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from mercurial import commands |
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from mercurial import changelog |
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from mercurial import phases |
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from mercurial.node import hex, bin, short, nullid |
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from mercurial.lock import release |
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### Patch changectx |
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############################# |
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def obsolete(ctx): |
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"""is the changeset obsolete by other""" |
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if ctx.node()is None: |
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return False |
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return bool(ctx._repo.obsoletedby(ctx.node())) and ctx.phase() |
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context.changectx.obsolete = obsolete |
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### revset |
39 | 114 |
############################# |
115 |
||
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def revsetobsolete(repo, subset, x): |
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"""obsolete changesets""" |
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args = revset.getargs(x, 0, 0, 'obsolete takes no argument') |
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return [r for r in subset if r in repo._obsoleteset and repo._phaserev[r] > 0] |
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|
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def revsetunstable(repo, subset, x): |
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"""non obsolete changesets descendant of obsolete one""" |
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args = revset.getargs(x, 0, 0, 'unstable takes no arguments') |
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return [r for r in subset if r in repo._unstableset] |
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126 |
|
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def revsetsuspended(repo, subset, x): |
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"""obsolete changesets with non obsolete descendants""" |
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args = revset.getargs(x, 0, 0, 'unstable takes no arguments') |
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return [r for r in subset if r in repo._suspendedset] |
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131 |
|
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def revsetextinct(repo, subset, x): |
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"""obsolete changesets without obsolete descendants""" |
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args = revset.getargs(x, 0, 0, 'unstable takes no arguments') |
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return [r for r in subset if r in repo._extinctset] |
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136 |
|
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### Other Extension compat |
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############################ |
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139 |
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def concludenode(orig, repo, rev, *args, **kwargs): |
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"""wrapper for rebase 's concludenode that set obsolete relation""" |
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newrev = orig(repo, rev, *args, **kwargs) |
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oldnode = repo[rev].node() |
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newnode = repo[newrev].node() |
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repo.addobsolete(newnode, oldnode) |
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return newrev |
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|
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def cmdrebase(orig, repo, ui, *args, **kwargs): |
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oldkeep = kwargs.pop('keep', False) |
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if oldkeep: |
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ui.warn('WARNING --keep option ignored by experimental obsolete extension') |
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kwargs['keep'] = True |
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return orig(repo, ui, *args, **kwargs) |
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|
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|
39 | 157 |
def extsetup(ui): |
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39 | 159 |
revset.symbols["obsolete"] = revsetobsolete |
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revset.symbols["unstable"] = revsetunstable |
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revset.symbols["suspended"] = revsetsuspended |
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revset.symbols["extinct"] = revsetextinct |
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|
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try: |
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rebase = extensions.find('rebase') |
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if rebase: |
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extensions.wrapfunction(rebase, 'concludenode', concludenode) |
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extensions.wrapcommand(rebase.cmdtable, "rebase", cmdrebase) |
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except KeyError: |
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pass # rebase not found |
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|
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# Pushkey mechanism for mutable |
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######################################### |
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|
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def pushobsolete(repo, key, old, raw): |
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"""push obsolete relation through pushkey""" |
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assert key == "relations" |
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w = repo.wlock() |
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try: |
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tmp = StringIO() |
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tmp.write(raw) |
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tmp.seek(0) |
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relations = _obsdeserialise(tmp) |
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for sub, objs in relations.iteritems(): |
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for obj in objs: |
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try: |
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repo.addobsolete(sub, obj) |
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189 |
except error.RepoLookupError: |
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pass |
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191 |
return 0 |
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192 |
finally: |
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w.release() |
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|
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def listobsolete(repo): |
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"""dump all obsolete relation in |
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|
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XXX this have be improved""" |
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tmp = StringIO() |
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_obsserialise(repo._obssubrels, tmp) |
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return {'relations': base64.b64encode(tmp.getvalue())} |
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|
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pushkey.register('obsolete', pushobsolete, listobsolete) |
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|
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### New commands |
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############################# |
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|
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|
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def cmddebugobsolete(ui, repo, subject, object): |
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"""Add an obsolete relation between a too node |
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|
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The subject is expected to be a newer version of the object""" |
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sub = repo[subject] |
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obj = repo[object] |
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repo.addobsolete(sub.node(), obj.node()) |
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return 0 |
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|
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cmdtable = {'debugobsolete': (cmddebugobsolete, [], '<subject> <object>')} |
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|
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### Altering existing command |
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############################# |
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|
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def wrapmayobsoletewc(origfn, ui, repo, *args, **opts): |
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res = origfn(ui, repo, *args, **opts) |
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if repo['.'].obsolete(): |
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ui.warn(_('Working directory parent is obsolete\n')) |
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return res |
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|
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def uisetup(ui): |
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extensions.wrapcommand(commands.table, "update", wrapmayobsoletewc) |
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extensions.wrapcommand(commands.table, "pull", wrapmayobsoletewc) |
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### serialisation |
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############################# |
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|
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def _obsserialise(obssubrels, flike): |
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"""serialise an obsolete relation mapping in a plain text one |
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|
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this is for subject -> [objects] mapping |
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|
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format is:: |
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|
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<subject-full-hex> <object-full-hex>\n""" |
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for sub, objs in obssubrels.iteritems(): |
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for obj in objs: |
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if sub is None: |
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sub = nullid |
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flike.write('%s %s\n' % (hex(sub), hex(obj))) |
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|
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def _obsdeserialise(flike): |
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"""read a file like object serialised with _obsserialise |
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|
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this desierialize into a {subject -> objects} mapping""" |
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rels = {} |
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for line in flike: |
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subhex, objhex = line.split() |
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subnode = bin(subhex) |
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if subnode == nullid: |
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subnode = None |
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rels.setdefault( subnode, set()).add(bin(objhex)) |
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return rels |
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|
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### diagnostique tools |
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############################# |
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def unstables(repo): |
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"""Return all unstable changeset""" |
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return scmutil.revrange(repo, ['obsolete():: and (not obsolete())']) |
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|
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def newerversion(repo, obs): |
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"""Return the newer version of an obsolete changeset""" |
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toproceed = set([obs]) |
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# XXX know optimization available |
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newer = set() |
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while toproceed: |
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current = toproceed.pop() |
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if current in repo._obsobjrels: |
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toproceed.update(repo._obsobjrels[current]) |
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elif current is not None: # None is kill |
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newer.add((current,)) |
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else: |
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newer.add(()) |
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return sorted(newer) |
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|
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|
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### repo subclassing |
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############################# |
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|
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def reposetup(ui, repo): |
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|
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291 |
if not repo.local(): |
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292 |
return |
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293 |
|
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opull = repo.pull |
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opush = repo.push |
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orollback = repo.rollback |
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o_writejournal = repo._writejournal |
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ocancopy = repo.cancopy |
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|
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class obsoletingrepo(repo.__class__): |
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|
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### Public method |
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def obsoletedby(self, node): |
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"""return the set of node that make <node> obsolete (obj)""" |
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return self._obsobjrels.get(node, set()) |
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|
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def obsolete(self, node): |
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308 |
"""return the set of node that <node> make obsolete (sub)""" |
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return self._obssubrels.get(node, set()) |
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310 |
|
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311 |
@util.propertycache |
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def _obsoleteset(self): |
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"""the set of obsolete revision""" |
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obs = set() |
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nm = self.changelog.nodemap |
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316 |
for obj in self._obsobjrels: |
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rev = nm.get(obj, None) |
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if rev is not None: |
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obs.add(rev) |
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return obs |
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|
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322 |
@util.propertycache |
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def _unstableset(self): |
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"""the set of non obsolete revision with obsolete parent""" |
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return set(self.revs('(obsolete()::) - obsolete()')) |
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|
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327 |
@util.propertycache |
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def _suspendedset(self): |
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329 |
"""the set of obsolete parent with non obsolete descendant""" |
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330 |
return set(self.revs('obsolete() and obsolete()::unstable()')) |
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|
331 |
|
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332 |
@util.propertycache |
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333 |
def _extinctset(self): |
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334 |
"""the set of obsolete parent without non obsolete descendant""" |
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335 |
return set(self.revs('obsolete() - obsolete()::unstable()')) |
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336 |
|
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337 |
def _clearobsoletecache(self): |
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338 |
if '_obsobjrels' in vars(self): |
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339 |
del self._obsobjrels |
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340 |
if '_obssubrels' in vars(self): |
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341 |
del self._obssubrels |
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342 |
if '_obsoleteset' in vars(self): |
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343 |
del self._obsoleteset |
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344 |
if '_unstableset' in vars(self): |
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345 |
del self._unstableset |
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346 |
if '_suspendedset' in vars(self): |
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347 |
del self._suspendedset |
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348 |
if '_extinct' in vars(self): |
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349 |
del self._extinctset |
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350 |
|
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351 |
def addobsolete(self, sub, obj): |
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352 |
"""Add a relation marking that node <sub> is a new version of <obj>""" |
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353 |
if sub == nullid: |
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354 |
sub = None |
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355 |
if obj in self._obssubrels.get(sub, set()): |
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356 |
return 0 |
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357 |
if sub == obj: |
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358 |
return 0 |
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359 |
self._obssubrels.setdefault(sub, set()).add(obj) |
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360 |
self._obsobjrels.setdefault(obj, set()).add(sub) |
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361 |
try: |
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362 |
if self[obj].phase() == 0: |
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363 |
if sub is None: |
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364 |
self.ui.warn( |
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365 |
_("trying to kill immutable changeset %(obj)s\n") |
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366 |
% {'obj': short(obj)}) |
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367 |
if sub is not None: |
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368 |
self.ui.warn( |
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369 |
_("%(sub)s try to obsolete immutable changeset %(obj)s\n") |
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370 |
% {'sub': short(sub), 'obj': short(obj)}) |
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371 |
self.changelog.hiddenrevs.add(repo[obj].rev()) |
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372 |
except (error.RepoLookupError, error.LookupError): |
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373 |
pass #unknow revision (but keep propagating the data |
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374 |
self._writeobsrels() |
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375 |
self._clearobsoletecache() |
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376 |
return 1 |
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377 |
|
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378 |
### obsolete storage |
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379 |
@util.propertycache |
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380 |
def _obsobjrels(self): |
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381 |
"""{<old-node> -> set(<new-node>)} |
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382 |
|
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383 |
also compute hidden revision""" |
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384 |
#reverse sub -> objs mapping |
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385 |
objrels = {} |
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|
386 |
for sub, objs in self._obssubrels.iteritems(): |
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387 |
for obj in objs: |
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|
388 |
objrels.setdefault(obj, set()).add(sub) |
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|
389 |
return objrels |
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|
390 |
|
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|
391 |
@util.propertycache |
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|
392 |
def _obssubrels(self): |
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393 |
"""{<new-node> -> set(<old-node>)}""" |
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394 |
return self._readobsrels() |
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|
395 |
|
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396 |
|
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|
397 |
|
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|
398 |
|
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|
399 |
### Disk IO |
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|
400 |
def _readobsrels(self): |
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|
401 |
"""Write obsolete relation on disk""" |
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|
402 |
# XXX handle lock |
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|
403 |
try: |
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|
404 |
f = self.opener('obsolete-relations') |
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|
405 |
try: |
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406 |
return _obsdeserialise(f) |
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|
407 |
finally: |
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|
408 |
f.close() |
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|
409 |
except IOError: |
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410 |
return {} |
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|
411 |
|
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|
412 |
def _writeobsrels(self): |
37
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|
413 |
"""Write obsolete relation on disk""" |
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|
414 |
# XXX handle lock |
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|
415 |
lock = self.wlock() |
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|
416 |
try: |
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417 |
f = self.opener('obsolete-relations', 'w', atomictemp=True) |
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|
418 |
try: |
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419 |
_obsserialise(self._obssubrels, f) |
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420 |
try: |
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421 |
f.rename() |
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422 |
except AttributeError: # old version |
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423 |
f.close() |
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424 |
finally: |
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425 |
f.close() |
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|
426 |
finally: |
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|
427 |
lock.release() |
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|
428 |
|
50
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clone support
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|
429 |
### local clone support |
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clone support
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|
430 |
|
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|
431 |
def cancopy(self): |
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|
432 |
"""wrapper on cancopy that deny copy if there is obsolete relation""" |
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433 |
return ocancopy() and not bool(self._obsobjrels) # you can't copy if there is obsolete |
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|
434 |
|
44
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Add pushkey support for pull and push
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|
435 |
### pull // push support |
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Add pushkey support for pull and push
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|
436 |
|
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|
437 |
def pull(self, remote, *args, **kwargs): |
74
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|
438 |
"""wrapper around push that push obsolete relation""" |
44
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439 |
result = opull(remote, *args, **kwargs) |
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440 |
if 'obsolete' in remote.listkeys('namespaces'): |
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|
441 |
tmp = StringIO() |
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|
442 |
rels = remote.listkeys('obsolete')['relations'] |
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|
443 |
tmp.write(base64.b64decode(rels)) |
56
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444 |
tmp.seek(0) |
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445 |
obsrels = _obsdeserialise(tmp) |
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|
446 |
for sub, objs in obsrels.iteritems(): |
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|
447 |
for obj in objs: |
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448 |
self.addobsolete(sub, obj) |
44
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|
449 |
return result |
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|
450 |
|
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|
451 |
def push(self, remote, *args, **opts): |
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|
452 |
"""wrapper around pull that pull obsolete relation""" |
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|
453 |
result = opush(remote, *args, **opts) |
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|
454 |
if 'obsolete' in remote.listkeys('namespaces'): |
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|
455 |
tmp = StringIO() |
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456 |
_obsserialise(self._obssubrels, tmp) |
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|
457 |
remote.pushkey('obsolete', 'relations', '', tmp.getvalue()) |
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|
458 |
|
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|
459 |
return result |
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|
460 |
|
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|
461 |
|
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|
462 |
|
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|
463 |
### rollback support |
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|
464 |
|
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|
465 |
def _writejournal(self, desc): |
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466 |
"""wrapped version of _writejournal that save obsolete data""" |
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467 |
entries = list(o_writejournal(desc)) |
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468 |
filename = 'obsolete-relations' |
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|
469 |
filepath = self.join(filename) |
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470 |
if os.path.exists(filepath): |
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471 |
journalname = 'journal.' + filename |
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472 |
journalpath = self.join(journalname) |
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473 |
util.copyfile(filepath, journalpath) |
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|
474 |
entries.append(journalpath) |
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|
475 |
return tuple(entries) |
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|
476 |
|
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|
477 |
def rollback(self, dryrun=False, **kwargs): |
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478 |
"""wrapped version of rollback that restore obsolete data""" |
52
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|
479 |
wlock = lock = None |
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|
480 |
try: |
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|
481 |
wlock = self.wlock() |
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482 |
lock = self.lock() |
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|
483 |
ret = orollback(dryrun, **kwargs) |
52
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|
484 |
if not (ret or dryrun): #rollback did not failed |
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|
485 |
src = self.join('undo.obsolete-relations') |
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|
486 |
dst = self.join('obsolete-relations') |
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|
487 |
if os.path.exists(src): |
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|
488 |
util.rename(src, dst) |
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|
489 |
elif os.path.exists(dst): #unlink in any case |
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490 |
os.unlink(dst) |
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|
491 |
# invalidate cache |
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|
492 |
self.__dict__.pop('_obssubrels', None) |
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|
493 |
self.__dict__.pop('_obsobjrels', None) |
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|
494 |
return ret |
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|
495 |
finally: |
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|
496 |
release(lock, wlock) |
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|
497 |
|
114
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|
498 |
@scmutil.filecache('00changelog.i', True) |
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|
499 |
def changelog(self): |
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|
500 |
changelog = getattr(super(obsoletingrepo, self), 'changelog') |
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|
501 |
old = changelog.__dict__.pop('hiddenrevs', ()) |
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|
502 |
if old: |
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|
503 |
ui.warn("old wasn't empty ? %r" % old) |
114
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|
504 |
def _sethidden(changelog, value): |
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|
505 |
assert not value |
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changeset
|
506 |
|
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changeset
|
507 |
|
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|
508 |
class hchangelog(changelog.__class__): |
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changeset
|
509 |
@util.propertycache |
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changeset
|
510 |
def hiddenrevs(changelog): |
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changeset
|
511 |
shown = ['not obsolete()', '.', 'bookmark()', 'tagged()', |
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|
512 |
'public()'] |
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|
513 |
basicquery = 'obsolete() - (::(%s))' % (' or '.join(shown)) |
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|
514 |
# !!! self is repo not changelog |
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|
515 |
result = set(scmutil.revrange(self, [basicquery])) |
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|
516 |
return result |
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|
517 |
changelog.__class__ = hchangelog |
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changeset
|
518 |
return changelog |
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changeset
|
519 |
|
1a64195e2b09
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112
diff
changeset
|
520 |
|
1a64195e2b09
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changeset
|
521 |
|
1a64195e2b09
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changeset
|
522 |
|
32
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diff
changeset
|
523 |
repo.__class__ = obsoletingrepo |
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|
524 |
if repo.ui.configbool('obsolete', 'secret-unstable', True): |
135
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changeset
|
525 |
symbol = 'obsolete()' |
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|
526 |
else: |
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|
527 |
symbol = 'extinct()' |
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|
528 |
|
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|
529 |
expobs = [c.node() for c in repo.set('%s - secret()' % symbol)] |
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|
530 |
if expobs: # do not lock in nothing move. locking for peanut make hgview reload on any command |
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|
531 |
lock = repo.lock() |
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|
532 |
try: |
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changeset
|
533 |
phases.retractboundary(repo, 2, expobs) |
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changeset
|
534 |
finally: |
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|
535 |
lock.release() |
32
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changeset
|
536 |
|
115
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changeset
|
537 |