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#!/usr/bin/env python
"""\
Common entries, like strings, etc, for the changeset reading + writing code.
"""
header_str = 'Bazaar-NG (bzr) changeset v'
version = (0, 0, 5)
def get_header():
return [
header_str + '.'.join([str(v) for v in version]),
'This changeset can be applied with bzr apply-changeset',
''
]
def canonicalize_revision(branch, revnos):
"""Turn some sort of revision information into a single
set of from-to revision ids.
A revision id can be None if there is no associated revison.
:param revnos: A list of revisions to lookup, should be at most 2 long
:return: (old, new)
"""
# If only 1 entry is given, then we assume we want just the
# changeset between that entry and it's base (we assume parents[0])
if len(revnos) == 0:
revnos = [None, None]
elif len(revnos) == 1:
revnos = [None, revnos[0]]
if revnos[1] is None:
new = branch.last_patch()
else:
new = branch.lookup_revision(revnos[1])
if revnos[0] is None:
old = branch.get_revision(new).parents[0].revision_id
else:
old = branch.lookup_revision(revnos[0])
return old, new
class ChangesetTree(object):
"""This class is designed to take a base tree, and re-create
a final tree based on the information contained within a
changeset.
"""
def __init__(self, branch, changeset_info):
"""Initialize this ChangesetTree.
:param branch: This is where information will be acquired
and updated.
:param changeset_info: Information about a given changeset,
so that we can identify the base,
and other information.
"""
self.branch = branch
self.changeset_info = changeset_info
self._build_tree()
def _build_tree(self):
"""Build the final description of the tree, based on
the changeset_info object.
"""
def format_highres_date(t, offset=0):
"""Format a date, such that it includes higher precision in the
seconds field.
:param t: UTC time in fractional seconds
:type t: float
:param offset: The timezone offset in integer seconds
:type offset: int
>>> from bzrlib.osutils import format_date
>>> format_date(1120153132.350850105, 0)
'Thu 2005-06-30 17:38:52 +0000'
>>> format_highres_date(1120153132.350850105, 0)
'Thu 2005-06-30 17:38:52.350850105 +0000'
>>> format_date(1120153132.350850105, -5*3600)
'Thu 2005-06-30 12:38:52 -0500'
>>> format_highres_date(1120153132.350850105, -5*3600)
'Thu 2005-06-30 12:38:52.350850105 -0500'
"""
from bzrlib.errors import BzrError
import time
assert isinstance(t, float)
# This has to be formatted for "original" date, so that the
# revision XML entry will be reproduced faithfully.
if offset == None:
offset = 0
tt = time.gmtime(t + offset)
return (time.strftime("%a %Y-%m-%d %H:%M:%S", tt)
+ ('%.9f' % (t - int(t)))[1:] # Get the high-res seconds, but ignore the 0
+ ' %+03d%02d' % (offset / 3600, (offset / 60) % 60))
def unpack_highres_date(date):
"""This takes the high-resolution date stamp, and
converts it back into the tuple (timestamp, timezone)
Where timestamp is in real seconds, and timezone is an integer
number of seconds offset.
:param date: A date formated by format_highres_date
:type date: string
"""
if __name__ == '__main__':
import doctest
doctest.testmod()
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