comparison hgext/rebase.py @ 7278:45495d784ad6

rebase: avoid redundant merges (issue1301)

7277:3e000e2bf5f6

For more information:
http://www.selenic.com/mercurial/wiki/index.cgi/RebaseProject
'''

from mercurial import util, repair, merge, cmdutil, dispatch, commands, extensions
from mercurial.commands import templateopts
from mercurial.node import nullrev
from mercurial.i18n import _
import os, errno

def rebase(ui, repo, **opts):
    """move changeset (and descendants) to a different branch

    Rebase uses repeated merging to graft changesets from one part of history

def concludenode(repo, rev, p1, p2, state, collapse, last=False, skipped={}):
    """Skip commit if collapsing has been required and rev is not the last
    revision, commit otherwise
    """
    repo.dirstate.setparents(repo[p1].node(), repo[p2].node())

    if collapse and not last:
        return None

    # Commit, record the old nodeid
    m, a, r = repo.status()[:3]
    newrev = nullrev
    try:

        repo.dirstate.invalidate()
        raise

def rebasenode(repo, rev, target, state, skipped, targetancestors, collapse):
    'Rebase a single revision'
    repo.ui.debug(_("rebasing %d:%s\n") % (rev, repo[rev].node()))

    p1, p2 = defineparents(repo, rev, target, state, targetancestors)

    # Merge phase
    if len(repo.parents()) != 2:
        # Update to target and merge it with local
        merge.update(repo, p1, False, True, False)
        repo.dirstate.write()
        stats = merge.update(repo, rev, True, False, False)

        if stats[3] > 0:
            raise util.Abort(_('fix unresolved conflicts with hg resolve then '
                                                'run hg rebase --continue'))
    else: # we have an interrupted rebase

7278:45495d784ad6

For more information:
http://www.selenic.com/mercurial/wiki/index.cgi/RebaseProject
'''

from mercurial import util, repair, merge, cmdutil, dispatch, commands
from mercurial import extensions, ancestor
from mercurial.commands import templateopts
from mercurial.node import nullrev
from mercurial.i18n import _
import os, errno

def rebasemerge(repo, rev, first=False):
    'return the correct ancestor'
    oldancestor = ancestor.ancestor
    
    def newancestor(a, b, pfunc):
        ancestor.ancestor = oldancestor
        anc = ancestor.ancestor(a, b, pfunc)
        if b == rev:
            return repo[rev].parents()[0].rev()
        return ancestor.ancestor(a, b, pfunc)

    if not first:
        ancestor.ancestor = newancestor
    else:
        repo.ui.debug(_("First revision, do not change ancestor\n"))
    stats = merge.update(repo, rev, True, True, False)
    return stats

def rebase(ui, repo, **opts):
    """move changeset (and descendants) to a different branch

    Rebase uses repeated merging to graft changesets from one part of history

def concludenode(repo, rev, p1, p2, state, collapse, last=False, skipped={}):
    """Skip commit if collapsing has been required and rev is not the last
    revision, commit otherwise
    """
    repo.ui.debug(_(" set parents\n"))
    if collapse and not last:
        repo.dirstate.setparents(repo[p1].node())
        return None

    repo.dirstate.setparents(repo[p1].node(), repo[p2].node())

    # Commit, record the old nodeid
    m, a, r = repo.status()[:3]
    newrev = nullrev
    try:

        repo.dirstate.invalidate()
        raise

def rebasenode(repo, rev, target, state, skipped, targetancestors, collapse):
    'Rebase a single revision'
    repo.ui.debug(_("rebasing %d:%s\n") % (rev, repo[rev]))

    p1, p2 = defineparents(repo, rev, target, state, targetancestors)

    repo.ui.debug(_(" future parents are %d and %d\n") % (repo[p1].rev(), 
                                                            repo[p2].rev()))
    
    # Merge phase
    if len(repo.parents()) != 2:
        # Update to target and merge it with local
        if repo['.'].rev() != repo[p1].rev():
            repo.ui.debug(_(" update to %d:%s\n") % (repo[p1].rev(), repo[p1]))
            merge.update(repo, p1, False, True, False)
        else:
            repo.ui.debug(_(" already in target\n"))
        repo.dirstate.write()
        repo.ui.debug(_(" merge against %d:%s\n") % (repo[rev].rev(), repo[rev]))
        first = repo[rev].rev() == repo[min(state)].rev()
        stats = rebasemerge(repo, rev, first)

        if stats[3] > 0:
            raise util.Abort(_('fix unresolved conflicts with hg resolve then '
                                                'run hg rebase --continue'))
    else: # we have an interrupted rebase