hgext/obsolete.py
author Pierre-Yves David <pierre-yves.david@logilab.fr>
Fri, 24 Aug 2012 12:47:12 +0200
branchstable
changeset 500 4387e62bd4f4
parent 491 6989d8fe4ed2
child 519 9825c7da5b54
permissions -rw-r--r--
Doc: several update
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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"""Deprecated extension that formely introduces "Changeset Obsolescence".
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This concept is now partially in Mercurial core (starting with mercurial 2.3). The remaining logic have been grouped with the evolve extension.
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Some code cemains in this extensions to detect and convert prehistoric format of obsolete marker than early user may have create. Keep it enabled if you were such user.
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"""
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from mercurial import util
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try:
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    from mercurial import obsolete
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    if not obsolete._enabled:
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        obsolete._enabled = True
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except ImportError:
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    raise util.Abort('Obsolete extension requires Mercurial 2.3 (or later)')
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import sys
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import json
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from mercurial import cmdutil
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from mercurial import error
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from mercurial.node import bin, nullid
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#####################################################################
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### Older format management                                       ###
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#####################################################################
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# Code related to detection and management of older legacy format never
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# handled by core
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def reposetup(ui, repo):
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    """Detect that a repo still contains some old obsolete format
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    """
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    if not repo.local():
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        return
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    for arg in sys.argv:
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        if 'debugc' in arg:
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            break
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    else:
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        data = repo.opener.tryread('obsolete-relations')
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        if not data:
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            data = repo.sopener.tryread('obsoletemarkers')
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        if data:
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            raise util.Abort('old format of obsolete marker detected!\n'
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                             'run `hg debugconvertobsolete` once.')
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def _obsdeserialise(flike):
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    """read a file like object serialised with _obsserialise
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    this desierialize into a {subject -> objects} mapping
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    this was the very first format ever."""
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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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cmdtable = {}
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command = cmdutil.command(cmdtable)
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@command('debugconvertobsolete', [], '')
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def cmddebugconvertobsolete(ui, repo):
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    """import markers from an .hg/obsolete-relations file"""
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    cnt = 0
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    err = 0
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    l = repo.lock()
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    some = False
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    try:
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        unlink = []
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        tr = repo.transaction('convert-obsolete')
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        try:
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            repo._importoldobsolete = True
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            store = repo.obsstore
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            ### very first format
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            try:
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                f = repo.opener('obsolete-relations')
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                try:
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                    some = True
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                    for line in f:
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                        subhex, objhex = line.split()
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                        suc = bin(subhex)
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                        prec = bin(objhex)
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                        sucs = (suc==nullid) and [] or [suc]
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                        meta = {
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                            'date':  '%i %i' % util.makedate(),
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                            'user': ui.username(),
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                            }
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                        try:
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                            store.create(tr, prec, sucs, 0, meta)
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                            cnt += 1
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                        except ValueError:
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                            repo.ui.write_err("invalid old marker line: %s"
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                                              % (line))
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                            err += 1
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                finally:
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                    f.close()
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                unlink.append(repo.join('obsolete-relations'))
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            except IOError:
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                pass
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            ### second (json) format
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            data = repo.sopener.tryread('obsoletemarkers')
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            if data:
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                some = True
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                for oldmark in json.loads(data):
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                    del oldmark['id']  # dropped for now
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                    del oldmark['reason']  # unused until then
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                    oldobject = str(oldmark.pop('object'))
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                    oldsubjects = [str(s) for s in oldmark.pop('subjects', [])]
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                    LOOKUP_ERRORS = (error.RepoLookupError, error.LookupError)
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                    if len(oldobject) != 40:
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                        try:
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                            oldobject = repo[oldobject].node()
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                        except LOOKUP_ERRORS:
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                            pass
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                    if any(len(s) != 40 for s in oldsubjects):
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                        try:
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                            oldsubjects = [repo[s].node() for s in oldsubjects]
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                        except LOOKUP_ERRORS:
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                            pass
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361
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                    oldmark['date'] = '%i %i' % tuple(oldmark['date'])
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                    meta = dict((k.encode('utf-8'), v.encode('utf-8'))
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                                 for k, v in oldmark.iteritems())
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                    try:
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                        succs = [bin(n) for n in oldsubjects]
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                        succs = [n for n in succs if n != nullid]
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                        store.create(tr, bin(oldobject), succs,
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                                     0, meta)
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                        cnt += 1
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                    except ValueError:
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                        repo.ui.write_err("invalid marker %s -> %s\n"
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                                     % (oldobject, oldsubjects))
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                        err += 1
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                unlink.append(repo.sjoin('obsoletemarkers'))
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            tr.close()
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            for path in unlink:
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                util.unlink(path)
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        finally:
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            tr.release()
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    finally:
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        del repo._importoldobsolete
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        l.release()
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    if not some:
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            ui.warn('nothing to do\n')
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    ui.status('%i obsolete marker converted\n' % cnt)
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    if err:
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        ui.write_err('%i conversion failed. check you graph!\n' % err)