[f60a0e4] | 1 | #
|
---|
| 2 | # Copyright (c) 2009 Jiri Svoboda
|
---|
| 3 | # All rights reserved.
|
---|
| 4 | #
|
---|
| 5 | # Redistribution and use in source and binary forms, with or without
|
---|
| 6 | # modification, are permitted provided that the following conditions
|
---|
| 7 | # are met:
|
---|
| 8 | #
|
---|
| 9 | # - Redistributions of source code must retain the above copyright
|
---|
| 10 | # notice, this list of conditions and the following disclaimer.
|
---|
| 11 | # - Redistributions in binary form must reproduce the above copyright
|
---|
| 12 | # notice, this list of conditions and the following disclaimer in the
|
---|
| 13 | # documentation and/or other materials provided with the distribution.
|
---|
| 14 | # - The name of the author may not be used to endorse or promote products
|
---|
| 15 | # derived from this software without specific prior written permission.
|
---|
| 16 | #
|
---|
| 17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
---|
| 18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
---|
| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
---|
| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
---|
| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
---|
| 22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
---|
| 23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
---|
| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
---|
| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
---|
| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
---|
| 27 | #
|
---|
| 28 |
|
---|
| 29 | """Main Branch Protection plugin for Bazaar."""
|
---|
| 30 |
|
---|
| 31 | #
|
---|
| 32 | # This plugin employs the pre_change_branch_tip hook to protect the main
|
---|
| 33 | # branch (a.k.a. linear history) of bzr repositories from unwanted change,
|
---|
| 34 | # effectively making the main branch append-only.
|
---|
[850987d] | 35 | #
|
---|
[f60a0e4] | 36 | # Specifically we verify that the new main branch contains the old tip.
|
---|
| 37 | # This prevents a branch from inadvertently aquiring the tip of another branch.
|
---|
| 38 | #
|
---|
| 39 | # Install this plugin in ~/.bazaar/plugins/mbprotect
|
---|
| 40 | #
|
---|
| 41 | # See also http://trac.helenos.org/trac.fcgi/wiki/BazaarWorkflow
|
---|
| 42 | #
|
---|
| 43 |
|
---|
| 44 | import bzrlib.branch
|
---|
| 45 | from bzrlib.errors import TipChangeRejected
|
---|
| 46 |
|
---|
| 47 | def pre_change_branch_tip(params):
|
---|
[850987d] | 48 | repo = params.branch.repository
|
---|
| 49 |
|
---|
| 50 | # Check if the old repository was empty.
|
---|
| 51 | if params.old_revid == 'null:':
|
---|
| 52 | return
|
---|
| 53 |
|
---|
| 54 | # First permitted case is appending changesets to main branch.Look for
|
---|
| 55 | # old tip in new main branch.
|
---|
| 56 | for revision_id in repo.iter_reverse_revision_history(params.new_revid):
|
---|
| 57 | if revision_id == params.old_revid:
|
---|
| 58 | return # Found old tip
|
---|
| 59 |
|
---|
| 60 | # Another permitted case is backing out changesets. Look for new tip
|
---|
| 61 | # in old branch.
|
---|
| 62 | for revision_id in repo.iter_reverse_revision_history(params.old_revid):
|
---|
| 63 | if revision_id == params.new_revid:
|
---|
| 64 | return # Found new tip
|
---|
| 65 |
|
---|
| 66 | # Trying to do something else. Reject the change.
|
---|
| 67 | raise TipChangeRejected('Bad tip. Read http://trac.helenos.org/wiki/BazaarWorkflow')
|
---|
[f60a0e4] | 68 |
|
---|
| 69 | # Install hook.
|
---|
| 70 | bzrlib.branch.Branch.hooks.install_named_hook('pre_change_branch_tip',
|
---|
[850987d] | 71 | pre_change_branch_tip, 'MB-Protect tip check')
|
---|