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#!/usr/bin/python
# -*- coding: utf-8 -*-
#################################################################################
# LAYMAN OVERLAY HANDLER
#################################################################################
# File: overlay.py
#
# Access to an xml list of overlays
#
# Copyright:
# (c) 2005 - 2009 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>
#
'''Main handler for overlays.'''
__version__ = "$Id: overlay.py 273 2006-12-30 15:54:50Z wrobel $"
#===============================================================================
#
# Dependencies
#
#-------------------------------------------------------------------------------
import sys, codecs, os, os.path
import xml.etree.ElementTree as ET # Python 2.5
from layman.overlays.bzr import BzrOverlay
from layman.overlays.darcs import DarcsOverlay
from layman.overlays.git import GitOverlay
from layman.overlays.mercurial import MercurialOverlay
from layman.overlays.cvs import CvsOverlay
from layman.overlays.svn import SvnOverlay
from layman.overlays.rsync import RsyncOverlay
from layman.overlays.tar import TarOverlay
from layman.debug import OUT
from layman.utils import indent
#===============================================================================
#
# Constants
#
#-------------------------------------------------------------------------------
OVERLAY_TYPES = dict((e.type_key, e) for e in (
GitOverlay,
CvsOverlay,
SvnOverlay,
RsyncOverlay,
TarOverlay,
BzrOverlay,
MercurialOverlay,
DarcsOverlay
))
#===============================================================================
#
# Class Overlays
#
#-------------------------------------------------------------------------------
class Overlays:
''' Handle a list of overlays.'''
def __init__(self, paths, config, ignore = 0, quiet = False):
self.config = config
self.quiet = quiet
self.paths = paths
self.ignore = ignore
self.overlays = {}
OUT.debug('Initializing overlay list handler', 8)
for path in self.paths:
if os.path.exists(path):
self.read_file(path)
def read_file(self, path):
'''Read the overlay definition file.'''
try:
document = open(path, 'r').read()
except Exception, error:
raise IOError('Failed to read the overlay list at ("'
+ path + '")!\nError was:\n' + str(error))
self.read(document)
def read(self, text):
'''
Read an xml list of overlays.
>>> here = os.path.dirname(os.path.realpath(__file__))
>>> config = {'svn_command': '/usr/bin/svn', 'rsync_command':'/usr/bin/rsync'}
>>> a = Overlays([here + '/tests/testfiles/global-overlays.xml', ], config)
>>> a.overlays.keys()
[u'wrobel', u'wrobel-stable']
>>> a.overlays['wrobel-stable'].src
u'rsync://gunnarwrobel.de/wrobel-stable'
'''
document = ET.fromstring(text)
overlays = document.findall('overlay') + \
document.findall('repo')
for overlay in overlays:
OUT.debug('Parsing overlay entry', 8)
_source = overlay.find('source')
if _source != None:
element_to_scan = _source
else:
element_to_scan = overlay
for attr_name in element_to_scan.attrib.keys():
if attr_name == 'type':
overlay_type = element_to_scan.attrib['type']
if overlay_type in OVERLAY_TYPES.keys():
try:
ovl = OVERLAY_TYPES[overlay_type](overlay,
self.config,
self.ignore,
self.quiet)
self.overlays[ovl.name] = ovl
except Exception, error:
OUT.warn(str(error), 3)
else:
raise Exception('Unknown overlay type "' +
overlay_type + '"!')
break
def write(self, path):
'''
Write the list of overlays to a file.
>>> write = os.tmpnam()
>>> here = os.path.dirname(os.path.realpath(__file__))
>>> config = {'svn_command': '/usr/bin/svn', 'rsync_command':'/usr/bin/rsync'}
>>> a = Overlays([here + '/tests/testfiles/global-overlays.xml', ], config)
>>> b = Overlays([write,], dict())
>>> b.overlays['wrobel-stable'] = a.overlays['wrobel-stable']
>>> b.write(write)
>>> c = Overlays([write,], dict())
>>> c.overlays.keys()
[u'wrobel-stable']
>>> os.unlink(write)
'''
xml = ET.Element('repositories', version="1.0")
xml[:] = [e.to_xml() for e in self.overlays.values()]
indent(xml)
tree = ET.ElementTree(xml)
try:
f = open(path, 'w')
f.write("""\
<?xml version="1.0" encoding="UTF-8"?>
""")
tree.write(f, encoding='utf-8')
f.close()
except Exception, error:
raise Exception('Failed to write to local overlays file: '
+ path + '\nError was:\n' + str(error))
def select(self, overlay):
'''
Select an overlay from the list.
>>> here = os.path.dirname(os.path.realpath(__file__))
>>> config = {'svn_command': '/usr/bin/svn', 'rsync_command':'/usr/bin/rsync'}
>>> a = Overlays([here + '/tests/testfiles/global-overlays.xml', ], config)
>>> a.select('wrobel-stable').src
u'rsync://gunnarwrobel.de/wrobel-stable'
'''
if overlay in self.overlays.keys():
return self.overlays[overlay]
def list(self, verbose = False, width = 0):
'''
List all overlays.
>>> here = os.path.dirname(os.path.realpath(__file__))
>>> config = {'svn_command': '/usr/bin/svn', 'rsync_command':'/usr/bin/rsync'}
>>> a = Overlays([here + '/tests/testfiles/global-overlays.xml', ], config)
>>> for i in a.list(True):
... print i[0]
wrobel
~~~~~~
Source : https://overlays.gentoo.org/svn/dev/wrobel
Contact : nobody@gentoo.org
Type : Subversion; Priority: 10
<BLANKLINE>
Description:
Test
<BLANKLINE>
wrobel-stable
~~~~~~~~~~~~~
Source : rsync://gunnarwrobel.de/wrobel-stable
Contact : nobody@gentoo.org
Type : Rsync; Priority: 50
<BLANKLINE>
Description:
A collection of ebuilds from Gunnar Wrobel [wrobel@gentoo.org].
<BLANKLINE>
>>> for i in a.list(False, 80):
... print i[0]
wrobel [Subversion] (https://o.g.o/svn/dev/wrobel )
wrobel-stable [Rsync ] (rsync://gunnarwrobel.de/wrobel-stable)
'''
result = []
for name, overlay in self.overlays.items():
if verbose:
result.append((str(overlay), overlay.is_supported(),
overlay.is_official()))
else:
result.append((overlay.short_list(width), overlay.is_supported(),
overlay.is_official()))
result = sorted(result)
return result
#===============================================================================
#
# Testing
#
#-------------------------------------------------------------------------------
if __name__ == '__main__':
import doctest, sys
# Ignore warnings here. We are just testing
from warnings import filterwarnings, resetwarnings
filterwarnings('ignore')
doctest.testmod(sys.modules[__name__])
resetwarnings()
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