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# Copyright (C) 2008 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Miscellaneous useful stuff."""
def single_plural(n, single, plural):
"""Return a single or plural form of a noun based on number."""
if n == 1:
return single
else:
return plural
def defines_to_dict(defines):
"""Convert a list of definition strings to a dictionary."""
if defines is None:
return None
result = {}
for define in defines:
kv = define.split('=', 1)
if len(kv) == 1:
result[define.strip()] = 1
else:
result[kv[0].strip()] = kv[1].strip()
return result
def invert_dict(d):
"""Invert a dictionary with keys matching each value turned into a list."""
# Based on recipe from ASPN
result = {}
for k, v in d.iteritems():
keys = result.setdefault(v, [])
keys.append(k)
return result
def invert_dictset(d):
"""Invert a dictionary with keys matching a set of values, turned into lists."""
# Based on recipe from ASPN
result = {}
for k, c in d.iteritems():
for v in c:
keys = result.setdefault(v, [])
keys.append(k)
return result
def _common_path_and_rest(l1, l2, common=[]):
# From http://code.activestate.com/recipes/208993/
if len(l1) < 1: return (common, l1, l2)
if len(l2) < 1: return (common, l1, l2)
if l1[0] != l2[0]: return (common, l1, l2)
return _common_path_and_rest(l1[1:], l2[1:], common+[l1[0]])
def common_path(path1, path2):
"""Find the common bit of 2 paths."""
return ''.join(_common_path_and_rest(path1, path2)[0])
def common_directory(paths):
"""Find the deepest common directory of a list of paths.
:return: if no paths are provided, None is returned;
if there is no common directory, '' is returned;
otherwise the common directory with a trailing / is returned.
"""
from bzrlib import osutils
def get_dir_with_slash(path):
if path == '' or path.endswith('/'):
return path
else:
dirname, basename = osutils.split(path)
if dirname == '':
return dirname
else:
return dirname + '/'
if not paths:
return None
elif len(paths) == 1:
return get_dir_with_slash(paths[0])
else:
common = common_path(paths[0], paths[1])
for path in paths[2:]:
common = common_path(common, path)
return get_dir_with_slash(common)
def escape_commit_message(message):
"""Replace xml-incompatible control characters."""
# This really ought to be provided by bzrlib.
# Code copied from bzrlib.commit.
# Python strings can include characters that can't be
# represented in well-formed XML; escape characters that
# aren't listed in the XML specification
# (http://www.w3.org/TR/REC-xml/#NT-Char).
import re
message, _ = re.subn(
u'[^\x09\x0A\x0D\u0020-\uD7FF\uE000-\uFFFD]+',
lambda match: match.group(0).encode('unicode_escape'),
message)
return message
def binary_stream(stream):
"""Ensure a stream is binary on Windows.
:return: the stream
"""
try:
import os
if os.name == 'nt':
fileno = getattr(stream, 'fileno', None)
if fileno:
no = fileno()
if no >= 0: # -1 means we're working as subprocess
import msvcrt
msvcrt.setmode(no, os.O_BINARY)
except ImportError:
pass
return stream
def best_format_for_objects_in_a_repository(repo):
"""Find the high-level format for branches and trees given a repository.
When creating branches and working trees within a repository, Bazaar
defaults to using the default format which may not be the best choice.
This routine does a reverse lookup of the high-level format registry
to find the high-level format that a shared repository was most likely
created via.
:return: the BzrDirFormat or None if no matches were found.
"""
# Based on code from bzrlib/info.py ...
from bzrlib import bzrdir
repo_format = repo._format
candidates = []
non_aliases = set(bzrdir.format_registry.keys())
non_aliases.difference_update(bzrdir.format_registry.aliases())
for key in non_aliases:
format = bzrdir.format_registry.make_bzrdir(key)
# LocalGitBzrDirFormat has no repository_format
if hasattr(format, "repository_format"):
if format.repository_format == repo_format:
candidates.append((key, format))
if len(candidates):
# Assume the first one. Is there any reason not to do that?
name, format = candidates[0]
return format
else:
return None
def open_destination_directory(location, format=None, verbose=True):
"""Open a destination directory and return the BzrDir.
If destination has a control directory, it will be returned.
Otherwise, the destination should be empty or non-existent and
a shared repository will be created there.
:param location: the destination directory
:param format: the format to use or None for the default
:param verbose: display the format used if a repository is created.
:return: BzrDir for the destination
"""
import os
from bzrlib import bzrdir, errors, trace, transport
try:
control, relpath = bzrdir.BzrDir.open_containing(location)
# XXX: Check the relpath is None here?
return control
except errors.NotBranchError:
pass
# If the directory exists, check it is empty. Otherwise create it.
if os.path.exists(location):
contents = os.listdir(location)
if contents:
errors.BzrCommandError("Destination must have a .bzr directory, "
" not yet exist or be empty - files found in %s" % (location,))
else:
try:
os.mkdir(location)
except IOError, ex:
errors.BzrCommandError("Unable to create %s: %s" %
(location, ex))
# Create a repository for the nominated format.
trace.note("Creating destination repository ...")
if format is None:
format = bzrdir.format_registry.make_bzrdir('default')
to_transport = transport.get_transport(location)
to_transport.ensure_base()
control = format.initialize_on_transport(to_transport)
repo = control.create_repository(shared=True)
if verbose:
from bzrlib.info import show_bzrdir_info
show_bzrdir_info(repo.bzrdir, verbose=0)
return control
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