view hgext/fetch.py @ 5827:0c29977bd7db

record: refactor record into generic record driver

rationale
---------

I'd like to make MQ version of record -- qrecord.

>From the first glance it seemed to be easy -- the task in essence would be to
change call to cmdutil.commit() to something like mq.qrefresh().

As it turned out queue.refresh() and cmdutil.commit() have different semantics
-- cmdutil.commit() first scans for changes and then delegate the actual commit
to lowlevel func. On the other hand queue.refresh() do it all in once, and I am
a bit scary to change it.

Maybe the right way would be to first refactor queue.refresh() to use
cmdutil.commit() machinery, and then trivially adjust record, but I feel I'm
not competent for the task right now.

Instead, I propose we refactor record to be some sort of high-level driver, or
like a high-level decorator one can say, which will first interactively filter
changes, and then delegate commit job to high-level commiter, e.g. 'commit' or
'qrefresh'


So, this patch does just that -- refactor record to be generic driver, and
update 'hg record' code to use the driver.

'hg qrecord' will follow.

# fetch.py - pull and merge remote changes
#
# Copyright 2006 Vadim Gelfer <[e-mail]>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.

from mercurial.i18n import _
from mercurial.node import *
from mercurial import commands, cmdutil, hg, node, util

def fetch(ui, repo, source='default', **opts):
    '''Pull changes from a remote repository, merge new changes if needed.

    This finds all changes from the repository at the specified path
    or URL and adds them to the local repository.

    If the pulled changes add a new head, the head is automatically
    merged, and the result of the merge is committed.  Otherwise, the
    working directory is updated.'''

    def postincoming(other, modheads):
        if modheads == 0:
            return 0
        if modheads == 1:
            return hg.clean(repo, repo.changelog.tip())
        newheads = repo.heads(parent)
        newchildren = [n for n in repo.heads(parent) if n != parent]
        newparent = parent
        if newchildren:
            newparent = newchildren[0]
            hg.clean(repo, newparent)
        newheads = [n for n in repo.heads() if n != newparent]
        err = False
        if newheads:
            ui.status(_('merging with new head %d:%s\n') %
                      (repo.changelog.rev(newheads[0]), short(newheads[0])))
            err = hg.merge(repo, newheads[0], remind=False)
        if not err and len(newheads) > 1:
            ui.status(_('not merging with %d other new heads '
                        '(use "hg heads" and "hg merge" to merge them)') %
                      (len(newheads) - 1))
        if not err:
            mod, add, rem = repo.status()[:3]
            message = (cmdutil.logmessage(opts) or
                       (_('Automated merge with %s') %
                        util.removeauth(other.url())))
            n = repo.commit(mod + add + rem, message,
                            opts['user'], opts['date'],
                            force_editor=opts.get('force_editor'))
            ui.status(_('new changeset %d:%s merges remote changes '
                        'with local\n') % (repo.changelog.rev(n),
                                           short(n)))
    def pull():
        cmdutil.setremoteconfig(ui, opts)

        other = hg.repository(ui, ui.expandpath(source))
        ui.status(_('pulling from %s\n') %
                  util.hidepassword(ui.expandpath(source)))
        revs = None
        if opts['rev'] and not other.local():
            raise util.Abort(_("fetch -r doesn't work for remote repositories yet"))
        elif opts['rev']:
            revs = [other.lookup(rev) for rev in opts['rev']]
        modheads = repo.pull(other, heads=revs)
        return postincoming(other, modheads)

    parent, p2 = repo.dirstate.parents()
    if parent != repo.changelog.tip():
        raise util.Abort(_('working dir not at tip '
                           '(use "hg update" to check out tip)'))
    if p2 != nullid:
        raise util.Abort(_('outstanding uncommitted merge'))
    wlock = lock = None
    try:
        wlock = repo.wlock()
        lock = repo.lock()
        mod, add, rem = repo.status()[:3]
        if mod or add or rem:
            raise util.Abort(_('outstanding uncommitted changes'))
        if len(repo.heads()) > 1:
            raise util.Abort(_('multiple heads in this repository '
                               '(use "hg heads" and "hg merge" to merge)'))
        return pull()
    finally:
        del lock, wlock

cmdtable = {
    'fetch':
        (fetch,
        [('r', 'rev', [], _('a specific revision you would like to pull')),
         ('f', 'force-editor', None, _('edit commit message')),
        ] + commands.commitopts + commands.commitopts2 + commands.remoteopts,
        _('hg fetch [SOURCE]')),
}