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  • Committer: Aaron Bentley
  • Date: 2005-11-10 20:15:27 UTC
  • Revision ID: aaron.bentley@utoronto.ca-20051110201527-8caa84ae529a1871
Added Daniel Silverstone to credits

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fetch_ghosts.py
 
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# Copyright (C) 2005 by Aaron Bentley
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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from bzrlib.branch import Branch
 
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from bzrlib.fetch import greedy_fetch
 
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from bzrlib.errors import NoSuchRevision, InstallFailed, BzrCommandError
 
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def fetch_ghosts(branch, no_fix):
 
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    """Install ghosts from copies in another branch."""
 
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    this_branch = Branch.open_containing('.')[0]
 
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    if branch is None:
 
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        branch = this_branch.get_parent()
 
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        if branch is None:
 
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            raise BzrCommandError('No branch specified and no location saved.')
 
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        else:
 
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            print "Using saved location %s" % branch
 
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    other_branch = Branch.open_containing(branch)[0]
 
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    installed = []
 
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    failed = []
 
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    lock_other = this_branch.base != other_branch.base
 
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    this_branch.lock_write()
 
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    try:
 
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        if lock_other:
 
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            other_branch.lock_read()
 
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        try:
 
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            # Because iter_ghosts tests for existence after our last fetch
 
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            # is complete, it won't falsely report an ancestor as a ghost.
 
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            # Yay iterators!
 
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            ghosts = iter_ghosts(this_branch)
 
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            for revision in ghosts:
 
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                try:
 
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                    greedy_fetch(this_branch, other_branch, revision)
 
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                    installed.append(revision)
 
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                except InstallFailed:
 
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                    failed.append(revision)
 
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            if len(installed) > 0:
 
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                print "Installed:"
 
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                for rev in installed:
 
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                    print rev
 
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            if len(failed) > 0:
 
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                print "Still missing:"
 
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                for rev in failed:
 
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                    print rev
 
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        finally:
 
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            if lock_other:
 
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                other_branch.unlock()
 
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    finally:
 
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        this_branch.unlock()
 
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    if not no_fix and len(installed) > 0:
 
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        from reweave_inventory import cmd_fix
 
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        cmd_fix().run(".")
 
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def iter_ghosts(branch):
 
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    """Find all ancestors that aren't stored in this branch."""
 
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    seen = set()
 
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    lines = [branch.last_revision()]
 
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    while len(lines) > 0:
 
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        new_lines = []
 
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        for line in lines:
 
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            if line in seen:
 
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                continue
 
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            seen.add(line)
 
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            try:
 
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                revision = branch.get_revision(line)
 
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                new_lines.extend(revision.parent_ids)
 
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            except NoSuchRevision:
 
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                yield line
 
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        lines = new_lines