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#!/usr/bin/python
# -*- coding: utf-8 -*-
#################################################################################
# POLYMERAZE XML UTILITIES
#################################################################################
# File: xml.py
#
# Utilities to deal with xml nodes.
#
# Copyright:
# (c) 2005 - 2008 Gunnar Wrobel
# (c) 2009 Sebastian Pipping
# (c) 2009 Christian Groschupp
# Distributed under the terms of the GNU General Public License v2
#
# Author(s):
# Gunnar Wrobel <wrobel@gentoo.org>
# Sebastian Pipping <sebastian@pipping.org>
# Christian Groschupp <christian@groschupp.org>
#
'''Utility functions to deal with xml nodes. '''
__version__ = '$Id: utils.py 236 2006-09-05 20:39:37Z wrobel $'
#===============================================================================
#
# Dependencies
#
#-------------------------------------------------------------------------------
import types, re, os
import sys
import locale
import codecs
from layman.output import Message
#===============================================================================
#
# Helper functions
#
#-------------------------------------------------------------------------------
def encoder(text, _encoding_):
return codecs.encode(text, _encoding_, 'replace')
def decode_selection(selection):
'''utility function to decode a list of strings
accoring to the filesystem encoding
'''
# fix None passed in, return an empty list
selection = selection or []
enc = sys.getfilesystemencoding()
if enc is not None:
return [encoder(i, enc) for i in selection]
return selection
def get_encoding(output):
if hasattr(output, 'encoding') \
and output.encoding != None:
return output.encoding
else:
encoding = locale.getpreferredencoding()
# Make sure that python knows the encoding. Bug 350156
try:
# We don't care about what is returned, we just want to
# verify that we can find a codec.
codecs.lookup(encoding)
except LookupError:
# Python does not know the encoding, so use utf-8.
encoding = 'utf_8'
return encoding
def pad(string, length):
'''Pad a string with spaces.'''
if len(string) <= length:
return string + ' ' * (length - len(string))
else:
return string[:length - 3] + '...'
def terminal_width():
'''Determine width of terminal window.'''
try:
width = int(os.environ['COLUMNS'])
if width > 0:
return width
except:
pass
try:
import struct, fcntl, termios
query = struct.pack('HHHH', 0, 0, 0, 0)
response = fcntl.ioctl(1, termios.TIOCGWINSZ, query)
width = struct.unpack('HHHH', response)[1]
if width > 0:
return width
except:
pass
return 80
# From <http://effbot.org/zone/element-lib.htm>
# BEGIN
def indent(elem, level=0):
i = "\n" + level*" "
if len(elem):
if not elem.text or not elem.text.strip():
elem.text = i + " "
if not elem.tail or not elem.tail.strip():
elem.tail = i
for elem in elem:
indent(elem, level+1)
if not elem.tail or not elem.tail.strip():
elem.tail = i
else:
if level and (not elem.tail or not elem.tail.strip()):
elem.tail = i
# END
def path(path_elements):
'''
Concatenate a path from several elements.
>>> path([])
''
>>> path(['a'])
'a'
>>> path(['a','b'])
'a/b'
>>> path(['a/','b'])
'a/b'
>>> path(['/a/','b'])
'/a/b'
>>> path(['/a/','b/'])
'/a/b'
>>> path(['/a/','b/'])
'/a/b'
>>> path(['/a/','/b/'])
'/a/b'
>>> path(['/a/','/b','c/'])
'/a/b/c'
'''
pathname = ''
if type(path_elements) in types.StringTypes:
path_elements = [path_elements]
# Concatenate elements and seperate with /
for i in path_elements:
pathname += i + '/'
# Replace multiple consecutive slashes
pathname = re.compile('/+').sub('/', pathname)
# Remove the final / if there is one
if pathname and pathname[-1] == '/':
pathname = pathname[:-1]
return pathname
def delete_empty_directory(mdir, output=None):
# test for a usable output parameter,
# and make it usable if not
if output is None:
output = Message()
if os.path.exists(mdir) and not os.listdir(mdir):
# Check for sufficient privileges
if os.access(mdir, os.W_OK):
output.info('Deleting _empty_ directory "%s"' % mdir, 2)
try:
os.rmdir(mdir)
except OSError, error:
output.warn(str(error))
else:
output.warn('Insufficient permissions to delete _empty_ folder "%s".' % mdir)
import getpass
if getpass.getuser() != 'root':
output.warn('Hint: You are not root.')
def create_overlay_dict(**kwargs):
"""Creates a complete empty reository definition.
Then fills it with values passed in
"""
result = {
'name': '',
'owner_name': '',
'owner_email': '',
'homepage': '',
'irc': '',
'description': '',
'feeds': [],
'sources': [('','','')],
'priority': 50,
'quality': u'experimental',
'status': '',
'official': False,
'supported': False,
}
for key in kwargs:
result[key] = kwargs[key]
return result
#===============================================================================
#
# Testing
#
#-------------------------------------------------------------------------------
if __name__ == '__main__':
import doctest, sys
doctest.testmod(sys.modules[__name__])
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