/brz/remove-bazaar

# Copyright (C) 2005 by Canonical Ltd

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import sys

import os

import bzrlib.errors

from bzrlib.trace import mutter, note

from bzrlib.branch import Branch

from bzrlib.progress import ProgressBar

def greedy_fetch(to_branch, from_branch, revision, pb):

    f = Fetcher(to_branch, from_branch, revision, pb)

    return f.count_copied, f.failed_revisions

class Fetcher(object):

    """Pull history from one branch to another."""

    def __init__(self, to_branch, from_branch, revision_limit=None, pb=None):

        self.to_branch = to_branch

        self.from_branch = from_branch

        self.revision_limit = revision_limit

        if pb is None:

            self.pb = bzrlib.ui.ui_factory.progress_bar()

        else:

            self.pb = pb

        self._scan_histories()

        self.failed_revisions = []

        self.count_copied = 0

        self._copy()

    def _scan_histories(self):

        self.from_history = from_branch.revision_history()

        self.required_revisions = set(from_history)

        self.to_history = to_branch.revision_history()

        if self.revision_limit:

            raise NotImplementedError('sorry, revision_limit not handled yet')

        self.need_revisions = []

        for rev_id in self.from_history:

            if not has_revision(self.to_branch):

                self.need_revisions.append(rev_id)

                mutter('need to get revision {%s}', rev_id)

    def _copy(self):

        while self.need_revisions:

            rev_id = self.need_revisions.pop()

            mutter('try to get revision {%s}', rev_id)

def has_revision(branch, revision_id):

    try:

        branch.get_revision_xml(revision_id)

        return True

    except bzrlib.errors.NoSuchRevision:

        return False

def old_greedy_fetch(to_branch, from_branch, revision=None, pb=None):

    """Copy all history from one branch to another.

    revision

        If set, copy only up to this point in the source branch.

    @returns: number copied, missing ids       

    """

    from_history = from_branch.revision_history()

    required_revisions = set(from_history)

    all_failed = set()

    if revision is not None:

        required_revisions.add(revision)

        try:

            rev_index = from_history.index(revision)

        except ValueError:

            rev_index = None

        if rev_index is not None:

            from_history = from_history[:rev_index + 1]

        else:

            from_history = [revision]

    to_history = to_branch.revision_history()

    missing = []

    for rev_id in from_history:

        if not has_revision(to_branch, rev_id):

            missing.append(rev_id)

    # recurse down through the revision graph, looking for things that

    # can't be found.

    count = 0

    while len(missing) > 0:

        installed, failed = to_branch.install_revisions(from_branch, 

                                                        revision_ids=missing,

                                                        pb=pb)

        count += installed

        required_failed = failed.intersection(required_revisions)

        if len(required_failed) > 0:

            raise bzrlib.errors.InstallFailed(required_failed)

        for rev_id in failed:

            note("Failed to install %s" % rev_id)

        all_failed.update(failed)

        new_missing = set() 

        for rev_id in missing:

            try:

                revision = from_branch.get_revision(rev_id)

            except bzrlib.errors.NoSuchRevision:

                if revision in from_history:

                    raise

                else:

                    continue

            for parent in [p.revision_id for p in revision.parents]:

                if not has_revision(to_branch, parent):

                    new_missing.add(parent)

        missing = new_missing

    return count, all_failed

def old_install_revisions(branch, other, revision_ids, pb):

    """Copy revisions from other branch into branch.

    This is a lower-level function used by a pull or a merge.  It

    incorporates some history from one branch into another, but

    does not update the revision history or operate on the working

    copy.

    revision_ids

        Sequence of revisions to copy.

    pb

        Progress bar for copying.

    """

    if False:

        if hasattr(other.revision_store, "prefetch"):

            other.revision_store.prefetch(revision_ids)

        if hasattr(other.inventory_store, "prefetch"):

            other.inventory_store.prefetch(revision_ids)

    if pb is None:

        pb = bzrlib.ui.ui_factory.progress_bar()

    revisions = []

    needed_texts = set()

    i = 0

    failures = set()

    for i, rev_id in enumerate(revision_ids):

        pb.update('fetching revision', i+1, len(revision_ids))

        try:

            rev = other.get_revision(rev_id)

        except bzrlib.errors.NoSuchRevision:

            failures.add(rev_id)

            continue

        revisions.append(rev)

        inv = other.get_inventory(rev_id)

        for key, entry in inv.iter_entries():

            if entry.text_id is None:

                continue

            if entry.text_id not in branch.text_store:

                needed_texts.add(entry.text_id)

    pb.clear()

    count, cp_fail = branch.text_store.copy_multi(other.text_store, 

                                                needed_texts)

    count, cp_fail = branch.inventory_store.copy_multi(other.inventory_store, 

                                                     revision_ids)

    count, cp_fail = branch.revision_store.copy_multi(other.revision_store, 

                                                    revision_ids,

                                                    permit_failure=True)

    assert len(cp_fail) == 0 

    return count, failures