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  • Committer: Michael Ellerman
  • Date: 2005-12-10 22:11:13 UTC
  • mto: This revision was merged to the branch mainline in revision 1528.
  • Revision ID: michael@ellerman.id.au-20051210221113-99ca561aaab4661e
Simplify handling of DivergedBranches in cmd_pull()

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bzrlib/missing.py
 
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"""\
 
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A plugin for displaying what revisions are in 'other' but not in local.
 
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"""
 
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def show_missing(br_local, br_remote, verbose=False, quiet=False):
 
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    """Show the revisions which exist in br_remote, that 
 
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    do not exist in br_local.
 
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    """
 
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    from bzrlib.log import show_one_log
 
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    import sys
 
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    local_history = br_local.revision_history()
 
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    remote_history = br_remote.revision_history()
 
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    if local_history == remote_history:
 
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        if not quiet:
 
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            print 'Trees are identical.'
 
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        return 0
 
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    if local_history[:len(remote_history)] == remote_history:
 
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        # Local is not missing anything from remote, so consider it
 
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        # up-to-date
 
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        if not quiet:
 
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            print 'Local tree has all of remote revisions (remote is missing local)'
 
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        return 0
 
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    if quiet:
 
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        return 1
 
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    # Check for divergence
 
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    common_idx = min(len(local_history), len(remote_history)) - 1
 
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    if common_idx >= 0 and local_history[common_idx] != remote_history[common_idx]:
 
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        print 'Trees have diverged'
 
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    local_rev_set = set(local_history)
 
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    # Find the last common revision between the two trees
 
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    revno = 0
 
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    for revno, (local_rev, remote_rev) in enumerate(zip(local_history, remote_history)):
 
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        if local_rev != remote_rev:
 
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            break
 
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    missing_remote = []
 
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    for rno, rev_id in enumerate(remote_history[revno:]):
 
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        # This assumes that you can have a revision in the
 
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        # local history, which does not have the same ancestry
 
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        # as the remote ancestry.
 
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        # This may or may not be possible.
 
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        # In the future this should also checked for merged revisions.
 
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        if rev_id not in local_rev_set:
 
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            missing_remote.append((rno+revno+1, rev_id))
 
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    print 'Missing %d revisions' %  len(missing_remote)
 
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    print
 
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    if verbose:
 
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        from bzrlib.diff import compare_trees
 
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        from bzrlib.tree import EmptyTree
 
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        show_ids = True
 
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        last_tree = EmptyTree
 
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        last_rev_id = None
 
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    else:
 
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        show_ids = False
 
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    for revno, rev_id in missing_remote:
 
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        rev = br_remote.get_revision(rev_id)
 
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        if verbose:
 
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            parent_rev_id = rev.parent_ids[0]
 
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            if last_rev_id == parent_rev_id:
 
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                parent_tree = last_tree
 
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            else:
 
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                parent_tree = br_remote.revision_tree(parent_rev_id)
 
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            revision_tree = br_remote.revision_tree(rev_id)
 
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            last_rev_id = rev_id
 
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            last_tree = revision_tree
 
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            delta = compare_trees(revision_tree, parent_tree)
 
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        else:
 
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            delta = None
 
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        show_one_log(revno, rev, delta, verbose, sys.stdout, 'original')
 
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    return 1
 
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