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# -*- coding: UTF-8 -*-
# Copyright © 2011-2012 Piotr Ożarowski <piotr@debian.org>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
from __future__ import with_statement
import logging
from os import environ, listdir, remove, rmdir
from os.path import dirname, exists, join, getsize, split
from subprocess import Popen, PIPE
from debpython.pydist import PUBLIC_DIR_RE
from debpython.tools import memoize, sitedir
log = logging.getLogger(__name__)
def parse(fpaths, other=None):
"""Parse namespace_packages.txt files."""
result = set(other or [])
for fpath in fpaths:
with open(fpath, 'r') as fp:
for line in fp:
if line:
result.add(line.strip())
return result
@memoize
def load(package=None):
"""Return a set of namespaces to regenerate/clean.
:param package: limit namespaces to the ones needed by given package
"""
fpaths = None
# DESTDIR is used in tests
nsdir = "%s/usr/share/python/ns/" % environ.get('DESTDIR', '')
if package:
# only one package is processed, no need to load all files
fpath = join(nsdir, package)
if exists(fpath):
fpaths = [fpath]
else:
# load all files
if exists(nsdir):
fpaths = [join(nsdir, i) for i in listdir(nsdir)]
if fpaths:
result = set(i.replace('.', '/') for i in parse(fpaths))
else:
result = set()
return result
def add_namespace_files(files, package=None, action=None):
"""Add __init__.py files to given generator."""
if action is not None:
namespaces = load(package)
already_processed = set()
removal_candidates = set()
for fn in files:
yield fn
if action is None:
continue
dpath = dirname(fn)
if dpath not in already_processed:
already_processed.add(dpath)
m = PUBLIC_DIR_RE.match(dpath)
if m:
public_dir = m.group()
while dpath != public_dir:
ns_dir = dpath[len(public_dir) + 1:]
if ns_dir in namespaces:
fpath = join(dpath, '__init__.py')
if action is True:
try:
open(fpath, 'a').close()
except Exception:
log.error('cannot create %s', fpath)
else:
yield fpath
else: # action is False
# postpone it due to dpkg -S call
removal_candidates.add(fpath)
already_processed.add(dpath)
dpath = split(dpath)[0]
# now deal with to-be-removed namespace candidates (dpkg -S is expensive)
# dpgk -S is used just to be safe (in case some other package is providing
# __init__.py file although it's in /usr/share/python/ns dir)
if action is False and removal_candidates:
process = Popen("/usr/bin/dpkg -S %s 2>/dev/null" % \
' '.join(removal_candidates), shell=True, stdout=PIPE)
# FIXME: len(search_string) > 131072
stdout, stderr = process.communicate()
for line in stdout.splitlines():
ns = line.split(': ', 1)[1]
if ns in removal_candidates:
removal_candidates.remove(ns)
for fpath in removal_candidates:
try:
remove(fpath)
except (IOError, OSError), e:
log.error('cannot remove %s', fpath)
log.debug(e)
else:
yield fpath
def remove_from_package(package, namespaces, versions):
"""Remove empty __init__.py files for requested namespaces."""
if not isinstance(namespaces, set):
namespaces = set(namespaces)
keep = set()
for ns in namespaces:
for version in versions:
fpath = join(sitedir(version, package), *ns.split('.'))
fpath = join(fpath, '__init__.py')
if not exists(fpath):
continue
if getsize(fpath) != 0:
log.warning('file not empty, cannot share %s namespace', ns)
keep.add(ns)
break
# return a set of namespaces that should be handled by pycompile/pyclean
result = namespaces - keep
# remove empty __init__.py files, if available
for ns in result:
for version in versions:
dpath = join(sitedir(version, package), *ns.split('.'))
fpath = join(dpath, '__init__.py')
if exists(fpath):
remove(fpath)
if not listdir(dpath):
rmdir(dpath)
# clean pyshared dir as well
dpath = join('debian', package, 'usr/share/pyshared', *ns.split('.'))
fpath = join(dpath, '__init__.py')
if exists(fpath):
remove(fpath)
if not listdir(dpath):
rmdir(dpath)
return result
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