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Viewing changes to bzrlib/revision.py

  • Committer: Robert Collins
  • Date: 2007-08-22 00:00:26 UTC
  • mfrom: (2739 +trunk)
  • mto: (2592.3.96 repository)
  • mto: This revision was merged to the branch mainline in revision 2742.
  • Revision ID: robertc@robertcollins.net-20070822000026-kvufiqhlreokb1en
Merge bzr.dev

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bzrlib/revision.py
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from bzrlib.osutils import contains_whitespace
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from bzrlib.progress import DummyProgress
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from bzrlib.symbol_versioning import (deprecated_function,
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        zero_eight,
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        )
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NULL_REVISION="null:"
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            source.unlock()
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@deprecated_function(zero_eight)
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def get_intervening_revisions(ancestor_id, rev_id, rev_source,
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                              revision_history=None):
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    """Find the longest line of descent from maybe_ancestor to revision.
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    Revision history is followed where possible.
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    If ancestor_id == rev_id, list will be empty.
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    Otherwise, rev_id will be the last entry.  ancestor_id will never appear.
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    If ancestor_id is not an ancestor, NotAncestor will be thrown
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    """
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    root, ancestors, descendants = revision_graph(rev_id, rev_source)
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    if len(descendants) == 0:
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        raise errors.NoSuchRevision(rev_source, rev_id)
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    if ancestor_id not in descendants:
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        rev_source.get_revision(ancestor_id)
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        raise errors.NotAncestor(rev_id, ancestor_id)
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    root_descendants = all_descendants(descendants, ancestor_id)
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    root_descendants.add(ancestor_id)
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    if rev_id not in root_descendants:
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        raise errors.NotAncestor(rev_id, ancestor_id)
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    distances = node_distances(descendants, ancestors, ancestor_id,
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                               root_descendants=root_descendants)
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    def best_ancestor(rev_id):
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        best = None
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        for anc_id in ancestors[rev_id]:
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            try:
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                distance = distances[anc_id]
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            except KeyError:
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                continue
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            if revision_history is not None and anc_id in revision_history:
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                return anc_id
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            elif best is None or distance > best[1]:
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                best = (anc_id, distance)
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        return best[0]
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    next = rev_id
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    path = []
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    while next != ancestor_id:
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        path.append(next)
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        next = best_ancestor(next)
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    path.reverse()
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    return path
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def is_reserved_id(revision_id):
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    """Determine whether a revision id is reserved
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def ensure_null(revision_id):
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    """Ensure only NULL_REVISION is used to represent the null revisionn"""
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    if revision_id is None:
 
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        symbol_versioning.warn('NULL_REVISION should be used for the null'
 
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            ' revision instead of None, as of bzr 0.91.',
 
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            DeprecationWarning, stacklevel=2)
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        return NULL_REVISION
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    else:
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        return revision_id
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def is_null(revision_id):
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    if revision_id is None:
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        symbol_versioning.warn('NULL_REVISION should be used for the null'
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            ' revision instead of None, as of bzr 0.19.',
 
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            ' revision instead of None, as of bzr 0.90.',
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            DeprecationWarning, stacklevel=2)
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    return revision_id in (None, NULL_REVISION)