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https://git.launchpad.net/ubuntu-dev-tools
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131 lines
4.1 KiB
Python
131 lines
4.1 KiB
Python
#
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# misc.py - misc functions for the Ubuntu Developer Tools scripts.
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#
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# Copyright (C) 2008, Jonathan Davies <jpds@ubuntu.com>,
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# 2008-2009, Siegfried-Angel Gevatter Pujals <rainct@ubuntu.com>,
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# 2010, Stefano Rivera <stefanor@ubuntu.com>
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#
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# ##################################################################
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 3
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# See file /usr/share/common-licenses/GPL for more details.
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#
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# ##################################################################
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# Modules.
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import locale
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import os
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import os.path
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from subprocess import Popen, PIPE
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import sys
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from ubuntutools.lp.udtexceptions import PocketDoesNotExistError
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_system_distribution = None
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def system_distribution():
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""" system_distro() -> string
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Detect the system's distribution and return it as a string. If the
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name of the distribution can't be determined, print an error message
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and return None.
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"""
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global _system_distribution
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if _system_distribution is None:
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try:
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if os.path.isfile('/usr/bin/dpkg-vendor'):
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process = Popen(('dpkg-vendor', '--query', 'vendor'),
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stdout=PIPE)
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else:
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process = Popen(('lsb_release', '-cs'), stdout=PIPE)
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output = process.communicate()[0]
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except OSError:
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print ('Error: Could not determine what distribution you are '
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'running.')
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return None
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if process.returncode != 0:
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print 'Error determininng system distribution'
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return None
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_system_distribution = output.strip()
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return _system_distribution
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def host_architecture():
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""" host_architecture -> string
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Detect the host's architecture and return it as a string. If the
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architecture can't be determined, print an error message and return None.
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"""
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arch = Popen(['dpkg', '--print-architecture'], stdout=PIPE, \
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stderr=PIPE).communicate()[0].split()
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if not arch or 'not found' in arch[0]:
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print 'Error: Not running on a Debian based system; could not ' \
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'detect its architecture.'
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return None
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return arch[0]
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def readlist(filename, uniq=True):
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""" readlist(filename, uniq) -> list
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Read a list of words from the indicated file. If 'uniq' is True, filter
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out duplicated words.
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"""
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if not os.path.isfile(filename):
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print 'File "%s" does not exist.' % filename
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return False
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content = open(filename).read().replace('\n', ' ').replace(',', ' ')
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if not content.strip():
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print 'File "%s" is empty.' % filename
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return False
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items = [item for item in content.split() if item]
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if uniq:
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items = list(set(items))
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return items
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def split_release_pocket(release):
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'''Splits the release and pocket name.
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If the argument doesn't contain a pocket name then the 'Release' pocket
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is assumed.
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Returns the release and pocket name.
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'''
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pocket = 'Release'
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if release is None:
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raise ValueError('No release name specified')
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if '-' in release:
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(release, pocket) = release.split('-')
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pocket = pocket.capitalize()
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if pocket not in ('Release', 'Security', 'Updates', 'Proposed',
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'Backports'):
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raise PocketDoesNotExistError("Pocket '%s' does not exist." % \
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pocket)
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return (release, pocket)
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def require_utf8():
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'''Can be called by programs that only function in UTF-8 locales'''
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if locale.getpreferredencoding() != 'UTF-8':
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print >> sys.stderr, ("This program only functions in a UTF-8 locale. "
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"Aborting.")
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sys.exit(1)
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