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Viewing: /snap/core18/3084/usr/bin/py3clean
#! /usr/bin/python3
# vim: et ts=4 sw=4
# Copyright © 2010-2012 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.
import logging
import optparse
import sys
# glob1() is not in the public documentation, UTSL.
from glob import glob1
from os import environ, remove, rmdir
from os.path import dirname, basename, exists, join, splitext
sys.path.insert(1, '/usr/share/python3/')
from debpython import files as dpf
from debpython.interpreter import Interpreter
from debpython.version import SUPPORTED, getver, vrepr
# initialize script
logging.basicConfig(format='%(levelname).1s: %(module)s:%(lineno)d: '
'%(message)s')
log = logging.getLogger(__name__)
"""TODO: move it to manpage
Examples:
py3clean -p python3-mako # all .py[co] files and __pycache__ directories from the package
py3clean /usr/lib/python3.1/dist-packages # python3.1
py3clean -V 3.3 /usr/lib/python3/ # python 3.3 only
py3clean -V 3.3 /usr/lib/foo/bar.py # bar/__pycache__/bar.cpython-33.py[co]
py3clean /usr/lib/python3/ # all Python 3.X
"""
def get_magic_tag_to_remove(version):
"""Returns magic tag or True if all of them should be removed."""
i = Interpreter('python')
map_ = {}
for v in SUPPORTED:
try:
map_[v] = i.magic_tag(v)
except Exception:
log.debug('magic tag for %s not recognized', vrepr(v), exc_info=True)
if version not in map_:
try:
map_[version] = i.magic_tag(version)
except Exception as e:
log.error('cannot find magic tag for Python %s: %s', vrepr(version), e)
exit(4)
tag = map_[version]
# skip shared tags
for v, t in map_.items():
if v == version:
continue
if t == tag:
log.info('magic tag(s) used by python%s. Nothing to remove.',
vrepr(v))
exit(0)
log.debug('magic tags to remove: %s', tag)
return tag
def destroyer(magic_tag=None): # ;-)
"""Remove every .py[co] file associated to received .py file.
:param magic_tag:
* If None, removes all associated .py[co] files from __pycache__
directory. If the resulting directory is empty, and is not a system
site package, then the directory is also removed.
* If False, removes python3.1's .pyc files only
* Otherwise removes given magic tag from __pycache__ directory. If
the resulting directory is empty, and is not a system site package,
then the directory is also removed.
:type magic_tag: None or False or str
"""
if magic_tag is None:
# remove compiled files in __pycache__ directory
def find_files_to_remove(pyfile):
directory = join(dirname(pyfile), '__pycache__')
fname = splitext(basename(pyfile))[0]
for fn in glob1(directory, "%s.*" % fname):
yield join(directory, fn)
# remove "classic" .pyc files as well
for filename in ("%sc" % pyfile, "%so" % pyfile):
if exists(filename):
yield filename
# workaround for http://bugs.python.org/issue22966
if '.' in fname:
sane_fname = join(dirname(pyfile), fname.split('.', 1)[0])
for fn in find_files_to_remove(sane_fname):
yield join(directory, fn)
elif magic_tag is False:
# remove 3.1's .pyc files only
def find_files_to_remove(pyfile): # NOQA
for filename in ("%sc" % pyfile, "%so" % pyfile):
if exists(filename):
yield filename
else:
# remove .pyc files for no longer needed magic tags
def find_files_to_remove(pyfile): # NOQA
directory = join(dirname(pyfile), '__pycache__')
fname = splitext(basename(pyfile))[0]
for fn in glob1(directory, "%s.%s.py[co]" % (fname, magic_tag)):
yield join(directory, fn)
# workaround for http://bugs.python.org/issue22966
if '.' in fname:
sane_fname = join(dirname(pyfile), fname.split('.', 1)[0])
for fn in find_files_to_remove(sane_fname):
yield join(directory, fn)
def myremove(fname):
remove(fname)
directory = dirname(fname)
# remove __pycache__ directory if it's empty
if directory.endswith('__pycache__'):
try:
rmdir(directory)
except Exception:
pass
counter = 0
try:
while True:
pyfile = (yield)
for filename in find_files_to_remove(pyfile):
try:
myremove(filename)
counter += 1
except (IOError, OSError) as e:
log.error('cannot remove %s', filename)
log.debug(e)
except GeneratorExit:
log.info("removed files: %s", counter)
def main():
usage = '%prog [-V VERSION] [-p PACKAGE] [DIR_OR_FILE]'
parser = optparse.OptionParser(usage, version='%prog 3.6.7-1~18.04')
parser.add_option('-v', '--verbose', action='store_true', dest='verbose',
help='turn verbose mode on')
parser.add_option('-q', '--quiet', action='store_false', dest='verbose',
default=False, help='be quiet')
parser.add_option('-p', '--package',
help='specify Debian package name to clean')
parser.add_option('-V', dest='version',
help='specify Python version to clean')
(options, args) = parser.parse_args()
if options.verbose or environ.get('PYCLEAN_DEBUG') == '1':
log.setLevel(logging.DEBUG)
log.debug('argv: %s', sys.argv)
log.debug('options: %s', options)
log.debug('args: %s', args)
else:
log.setLevel(logging.WARNING)
if options.version:
if options.version.endswith('3.1'): # 3.1, -3.1
magic_tag = False
else:
magic_tag = get_magic_tag_to_remove(getver(options.version))
d = destroyer(magic_tag)
else:
d = destroyer() # remove everything
next(d) # initialize coroutine
if not options.package and not args:
parser.print_usage()
exit(1)
if options.package:
log.info('cleaning package %s', options.package)
pfiles = set(dpf.from_package(options.package))
if args:
log.info('cleaning directories: %s', args)
files = set(dpf.from_directory(args))
if options.package:
files = files & pfiles
else:
files = pfiles
for filename in files:
d.send(filename)
if __name__ == '__main__':
main()