/usr/lib/python3/dist-packages/instant/paths.py is in python3-instant 2017.2.0.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | """This module contains helper functions for working with temp and cache directories."""
# Copyright (C) 2008 Martin Sandve Alnes
# Copyright (C) 2012 Florian Rathgeber
#
# This file is part of Instant.
#
# Instant is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Instant is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Instant. If not, see <http://www.gnu.org/licenses/>.
#
# Alternatively, Instant may be distributed under the terms of the BSD license.
# Utilities for directory handling:
from six import string_types
import os
import sys
import errno
import shutil
import tempfile
import time
from .signatures import compute_checksum
from .output import instant_debug, instant_assert
_tmp_dir = None
def get_temp_dir():
"""Return a temporary directory for the duration of this process.
Multiple calls in the same process returns the same directory.
Remember to call delete_temp_dir() before exiting."""
global _tmp_dir
if _tmp_dir is None:
datestring = "%d-%d-%d-%02d-%02d" % time.localtime()[:5]
suffix = datestring + "_instant_" + compute_checksum(get_default_cache_dir())
_tmp_dir = tempfile.mkdtemp(suffix)
instant_debug("Created temp directory '%s'." % _tmp_dir)
return _tmp_dir
def delete_temp_dir():
"""Delete the temporary directory created by get_temp_dir()."""
global _tmp_dir
if _tmp_dir and os.path.isdir(_tmp_dir):
shutil.rmtree(_tmp_dir, ignore_errors=True)
_tmp_dir = None
def get_instant_dir():
"Return the default instant directory, creating it if necessary."
# Place default cache dir in virtualenv or conda prefix
# if one of them are active, or under user's home directory
home = os.path.expanduser("~")
venv = os.environ.get("VIRTUAL_ENV")
cenv = os.environ.get("CONDA_PREFIX")
if venv == sys.prefix:
env = venv
elif cenv == sys.prefix:
env = cenv
else:
env = home
instant_dir = os.path.join(env, ".cache", "instant")
# If placed in home directory, add python version for safety,
# since C extensions are not compatible across versions.
# (for python 3, it's possible to use the stable C API,
# however we don't know if the instant user has done that)
if env == home:
ver = "python%d.%d" % sys.version_info[:2]
instant_dir = os.path.join(instant_dir, ver)
makedirs(instant_dir)
return instant_dir
def get_default_cache_dir():
"Return the default cache directory."
cache_dir = os.environ.get("INSTANT_CACHE_DIR")
# Catches the cases where INSTANT_CACHE_DIR is not set or ''
if not cache_dir:
cache_dir = os.path.join(get_instant_dir(), "cache")
makedirs(cache_dir)
return cache_dir
def get_default_error_dir():
"Return the default error directory."
error_dir = os.environ.get("INSTANT_ERROR_DIR")
# Catches the cases where INSTANT_ERROR_DIR is not set or ''
if not error_dir:
error_dir = os.path.join(get_instant_dir(), "error")
makedirs(error_dir)
return error_dir
def validate_cache_dir(cache_dir):
if cache_dir is None:
return get_default_cache_dir()
instant_assert(isinstance(cache_dir, string_types), "Expecting cache_dir to be a string.")
cache_dir = os.path.abspath(cache_dir)
makedirs(cache_dir)
return cache_dir
def makedirs(path):
"""
Creates a directory (tree). If directory already excists it does nothing.
"""
try:
os.makedirs(path)
instant_debug("In instant.makedirs: Creating directory %r" % path)
except os.error as e:
if e.errno != errno.EEXIST:
raise
def _test():
from .output import set_logging_level
set_logging_level("DEBUG")
print("Temp dir:", get_temp_dir())
print("Instant dir:", get_instant_dir())
print("Default cache dir:", get_default_cache_dir())
print("Default error dir:", get_default_error_dir())
delete_temp_dir()
if __name__ == "__main__":
_test()
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