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Viewing changes to fetch_ghosts.py

  • Committer: Aaron Bentley
  • Date: 2008-04-11 00:03:51 UTC
  • Revision ID: aaron@aaronbentley.com-20080411000351-dmbvgmanygnphzgp
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fetch_ghosts.py
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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 find_branch
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from bzrlib.fetch import greedy_fetch
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from bzrlib.errors import NoSuchRevision, InstallFailed
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def fetch_missing(branch):
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    """Install the revisions of missing ancestors from another branch."""
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    this_branch = find_branch('.')
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    other_branch = find_branch(branch)
 
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from bzrlib.branch import Branch
 
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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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    # Because iter_missing_ancestors tests for existence after our last fetch
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    # is complete, it won't falsely report an ancestor as missing.
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    # Yay iterators!
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    missing = iter_missing_ancestors(this_branch)
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    for revision in missing:
 
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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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            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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def iter_missing_ancestors(branch):
 
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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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                    this_branch.fetch(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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            else:
 
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                if this_branch.last_revision() is None:
 
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                    print "No revisions in branch."
 
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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 bzrlib.builtins import cmd_reconcile
 
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        cmd_reconcile().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_patch()]
 
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    lines = [branch.last_revision()]
 
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    if lines[0] is None:
 
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        return
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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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                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([r.revision_id for r in revision.parents])
 
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                revision = branch.repository.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