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Viewing changes to bzrlib/uncommit.py

  • Committer: Robert Collins
  • Date: 2006-03-11 13:58:48 UTC
  • mto: (1615.1.2 bzr.mbp.integration)
  • mto: This revision was merged to the branch mainline in revision 1616.
  • Revision ID: robertc@robertcollins.net-20060311135848-789fa616b8da4662
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bzrlib/uncommit.py
 
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#!/usr/bin/env python
 
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"""\
 
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Remove the last revision from the history of the current branch.
 
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"""
 
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import os
 
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import bzrlib
 
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def test_remove(filename):
 
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    if os.path.exists(filename):
 
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        os.remove(filename)
 
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    else:
 
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        print '* file does not exist: %r' % filename
 
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def uncommit(branch, dry_run=False, verbose=False, revno=None, tree=None):
 
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    """Remove the last revision from the supplied branch.
 
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    :param dry_run: Don't actually change anything
 
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    :param verbose: Print each step as you do it
 
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    :param revno: Remove back to this revision
 
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    """
 
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    from bzrlib.atomicfile import AtomicFile
 
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    rh = branch.revision_history()
 
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    if revno is None:
 
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        revno = len(rh)
 
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    files_to_remove = []
 
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    new_rev_history = AtomicFile(branch.control_files.controlfilename('revision-history'))
 
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    for r in range(revno-1, len(rh)):
 
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        rev_id = rh.pop()
 
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        if verbose:
 
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            print 'Removing revno %d: %s' % (len(rh)+1, rev_id)
 
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    new_rev_history.write('\n'.join(rh))
 
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    # Committing before we start removing files, because
 
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    # once we have removed at least one, all the rest are invalid.
 
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    if not dry_run:
 
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        new_rev_history.commit()
 
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        if tree is not None:
 
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            tree.set_last_revision(branch.last_revision())
 
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    else:
 
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        new_rev_history.abort()
 
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