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#!/usr/bin/env python
"""\
Remove the last revision from the history of the current branch.
"""
import os
import bzrlib
def test_remove(filename):
if os.path.exists(filename):
os.remove(filename)
else:
print '* file does not exist: %r' % filename
def uncommit(branch, dry_run=False, verbose=False, revno=None, tree=None):
"""Remove the last revision from the supplied branch.
:param dry_run: Don't actually change anything
:param verbose: Print each step as you do it
:param revno: Remove back to this revision
"""
from bzrlib.atomicfile import AtomicFile
rh = branch.revision_history()
if revno is None:
revno = len(rh)
files_to_remove = []
new_rev_history = AtomicFile(branch.control_files.controlfilename('revision-history'))
for r in range(revno-1, len(rh)):
rev_id = rh.pop()
if verbose:
print 'Removing revno %d: %s' % (len(rh)+1, rev_id)
new_rev_history.write('\n'.join(rh))
# Committing before we start removing files, because
# once we have removed at least one, all the rest are invalid.
if not dry_run:
new_rev_history.commit()
if tree is not None:
tree.set_last_revision(branch.last_revision())
else:
new_rev_history.abort()
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