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Viewing changes to bzrlib/uncommit.py

  • Committer: Martin Pool
  • Date: 2006-05-10 03:49:42 UTC
  • mfrom: (1624.3.47 bzr.olaf.info)
  • mto: This revision was merged to the branch mainline in revision 1707.
  • Revision ID: mbp@sourcefrog.net-20060510034942-d317207825dff3c1
(merge olaf) info test improvements

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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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from bzrlib.errors import BoundBranchOutOfDate
 
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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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    unlockable = []
 
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    try:
 
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        if tree is not None:
 
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            tree.lock_write()
 
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            unlockable.append(tree)
 
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        branch.lock_write()
 
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        unlockable.append(branch)
 
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        master = branch.get_master_branch()
 
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        if master is not None:
 
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            master.lock_write()
 
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            unlockable.append(master)
 
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        rh = branch.revision_history()
 
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        if master is not None and rh[-1] != master.last_revision():
 
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            raise BoundBranchOutOfDate(branch, master)
 
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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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        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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        # 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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            if master is not None:
 
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                master.set_revision_history(rh)
 
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            branch.set_revision_history(rh)
 
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            if tree is not None:
 
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                tree.set_last_revision(branch.last_revision())
 
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    finally:
 
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        for item in reversed(unlockable):
 
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            item.unlock()