Source code for ixpeobssim.utils.os_
#!/usr/bin/env python
# *********************************************************************
# * Copyright (C) 2015 Luca Baldini (luca.baldini@pi.infn.it) *
# * *
# * For the license terms see the file LICENSE, distributed *
# * along with this software. *
# *********************************************************************
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
from __future__ import print_function, division
"""Collection of os-related utilities.
"""
import os
import shutil
from ixpeobssim.utils.logging_ import logger, abort
[docs]
def check_output_file(file_path, suffix, overwrite=False, extension='fits'):
"""Small utility function to manage the I/O in the ixpeobssim applications.
This basically build the path to the output file, given that to the input file,
given a small set of rules. Among other things, the function verifies that
the input file exists and has the right extension. If the output file
exists and the overwite flag is not set, the function is returning None, as
a mean for consumer functions to be aware that the aformentioned files should
not be overwritten.
Args
----
file_path : str
The path to the input file.
suffix : str
The suffix to be attached to the output file.
overwrite : bool
Flag to automatically overwite existing files.
extension : str
The extension of the input and output files.
"""
assert extension is not None
check_input_file(file_path, extension)
output_file_path = file_path.replace('.%s' % extension, '_%s.%s' % (suffix, extension))
if os.path.exists(output_file_path) and not overwrite:
logger.info('Output file %s already exists.' % output_file_path)
logger.info('Remove it or use "--overwrite True" to overwite it.')
return None
return output_file_path
[docs]
def mkdir(dir_path):
"""Create a directory (unless it already exists).
Return 0 upon succesfull operation, 1 otherwise.
"""
if not os.path.exists(dir_path):
logger.info('About to create folder %s...' % dir_path)
try:
os.makedirs(dir_path)
logger.info('Folder succesfully created.')
status = 0
except Exception as e:
logger.error('Could not create folder (%s)' % e)
status = 1
return status
[docs]
def cp(source, dest, create_tree = False):
"""Copy a file.
Return 0 upon succesfull operation, 1 otherwise.
"""
logger.info('About to copy %s to %s...' % (source, dest))
dest_folder = os.path.dirname(dest)
if not os.path.exists(dest_folder) and create_tree:
mkdir(dest_folder)
try:
if os.path.isdir(source):
shutil.copytree(source, dest)
else:
shutil.copy(source, dest)
logger.info('File succesfully copied.')
status = 0
except Exception as e:
logger.error('Could not copy file (%s)' % e)
status = 1
return status
[docs]
def mv(source, dest):
"""Move a file.
Return 0 upon succesfull operation, 1 otherwise.
"""
logger.info('About to move %s to %s...' % (source, dest))
try:
shutil.move(source, dest)
logger.info('File succesfully copied.')
status = 0
except Exception as e:
logger.error('Could not move file (%s)' % e)
status = 1
return status
[docs]
def rm(file_path):
""" Remove a file.
Return 0 upon succesfull operation, 1 otherwise.
"""
logger.info('About to remove file %s...' % file_path)
if not os.path.exists(file_path):
logger.info('File is not there, giving up...')
return 0
try:
os.remove(file_path)
logger.info('File succesfully removed.')
status = 0
except Exception as e:
logger.error('Could not remove file (%s)' % e)
status = 1
return status
[docs]
def rmdir(dir_path):
""" Remove an entire (empty or non empty) folder.
"""
logger.info('About to remove folder %s...' % dir_path)
try:
shutil.rmtree(dir_path)
logger.info('Folder succesfully removed.')
status = 0
except Exception as e:
logger.error('Could not remove folder (%s)' % e)
status = 1
return status