states.py
author Pierre-Yves David <pierre-yves.david@logilab.fr>
Mon, 23 May 2011 14:25:22 +0200
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fix test
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# states.py - introduce the state concept for mercurial changeset
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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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#                Augie Fackler     <durin42@gmail.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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'''introduce the state concept for mercurial changeset
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Change can be in the following state:
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0 immutable
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1 mutable
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2 private
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name are not fixed yet.
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'''
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from functools import partial
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from mercurial.i18n import _
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from mercurial import cmdutil
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from mercurial import scmutil
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from mercurial import context
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from mercurial import revset
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from mercurial import templatekw
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from mercurial import util
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from mercurial import node
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from mercurial.node import nullid
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from mercurial import discovery
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from mercurial import extensions
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_NOPULLPUSH=2
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STATES = (0, _NOPULLPUSH)
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def statename(state):
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    return str(STATES)
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# util function
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#############################
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def noderange(repo, revsets):
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    return map(repo.changelog.node,
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               scmutil.revrange(repo, revsets))
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# Patch changectx
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#############################
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def state(ctx):
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    return ctx._repo.nodestate(ctx.node())
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context.changectx.state = state
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# improve template
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#############################
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def showstate(ctx, **args):
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    return ctx.state()
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# New revset predicate
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#############################
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def revsetpublicheads(repo, subset, x):
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    args = revset.getargs(x, 0, 0, 'publicheads takes no arguments')
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    heads = map(repo.changelog.rev, repo._statesheads[0])
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    heads.sort()
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    return heads
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def extsetup(ui):
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    revset.symbols['publicheads'] = revsetpublicheads
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REVSETHEADS = {0: 'publicheads()'}
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# New commands
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#############################
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def cmdsetstate(ui, repo, state, *changesets):
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    """turn private changesets into public ones"""
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    #assert repo.ui.configbool('private', 'enable', False)
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    state = int(state) #for now
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    revs = scmutil.revrange(repo, changesets)
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    repo.setstate(state, [repo.changelog.node(rev) for rev in revs])
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    return 0
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cmdtable = {
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    'setstate':  (cmdsetstate,   [], _('state <revset>')),
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    }
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templatekw.keywords['state'] = showstate
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def uisetup(ui):
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    def filterprivateout(orig, repo, *args,**kwargs):
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        common, heads = orig(repo, *args, **kwargs)
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        return common, repo._reducehead(heads)
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    def filterprivatein(orig, repo, remote, *args, **kwargs):
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        common, anyinc, heads = orig(repo, remote, *args, **kwargs)
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        heads = remote._reducehead(heads)
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        return common, anyinc, heads
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    extensions.wrapfunction(discovery, 'findcommonoutgoing', filterprivateout)
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    extensions.wrapfunction(discovery, 'findcommonincoming', filterprivatein)
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def reposetup(ui, repo):
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    if not repo.local():
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        return
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    class statefulrepo(repo.__class__):
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        def nodestate(self, node):
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            rev = self.changelog.rev(node)
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            for head in self._publicheads:
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                revhead = self.changelog.rev(head)
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                if self.changelog.descendant(revhead, rev):
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                    return STATES[1]
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            return STATES[0]
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1
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        @property
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        def _publicheads(self):
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            if self.ui.configbool('states', 'private', False):
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                return self._statesheads[0]
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            return self.heads()
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        @util.propertycache
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        def _statesheads(self):
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            return self._readstatesheads()
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        def _readstatesheads(self):
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            statesheads = {}
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            try:
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                f = self.opener('publicheads')
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                try:
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                    heads = sorted([node.bin(n) for n in f.read().split() if n])
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                finally:
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                    f.close()
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            except IOError:
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                heads = [nullid]
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            statesheads[0] = heads
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            return statesheads
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        def _writestateshead(self):
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            # transaction!
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            f = self.opener('publicheads', 'w', atomictemp=True)
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            try:
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                for h in self._statesheads[0]:
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                    f.write(node.hex(h) + '\n')
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                f.rename()
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            finally:
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                f.close()
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        def setstate(self, state, nodes):
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            """freeze targets changeset and it's ancestors.
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            Simplify the list of head."""
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            heads = self._statesheads[state]
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            olds = heads[:]
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            heads.extend(nodes)
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            heads[:] = set(heads)
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            heads.sort()
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            if olds != heads:
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                heads[:] = noderange(repo, ["heads(::%s)" % REVSETHEADS[state]])
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                heads.sort()
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            if olds != heads:
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                self._writestateshead()
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2
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        def _reducehead(self, candidates):
1
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            selected = set()
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            for candidate in candidates:
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                rev = self.changelog.rev(candidate)
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                ok = True
2
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                for h in self._publicheads:
1
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                    revh = self.changelog.rev(h)
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                    if self.changelog.descendant(revh, rev):
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                        ok = False
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                        selected.add(h)
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                if ok:
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                    selected.add(candidate)
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            return sorted(selected)
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0
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    repo.__class__ = statefulrepo
1
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