def read_in_file(filename):
"""Read values from file into a list object. Expecting newline delimited.
:param filename: the filename to read
:returns: the list of values found in the file
:raises: ValueError if incoming value is not a file that could be found
"""
result = None
input_path = os.path.expanduser(os.path.expandvars(filename))
# pylint: disable=no-else-return
if os.path.isfile(input_path):
try:
with open(input_path, 'r') as in_file:
result = in_file.read().splitlines()
except EnvironmentError as err:
err_msg = t(messages.READ_FILE_ERROR % (input_path, err))
log.error(err_msg)
return result
else:
raise ValueError(t(messages.NOT_A_FILE % input_path))
def validate_write_file(filename, param_name):
"""Write content to a file.
:param filename: the filename to write
:param param_name: the parameter name that provided
the filename
:raises: ValueError for validation errors
"""
input_path = os.path.expanduser(os.path.expandvars(filename))
if not input_path:
raise ValueError(t(messages.REPORT_OUTPUT_CANNOT_BE_EMPTY %
param_name))
if os.path.isdir(input_path):
raise ValueError(
t(messages.REPORT_OUTPUT_IS_A_DIRECTORY %
(param_name, input_path)))
directory = os.path.dirname(input_path)
if directory and not os.path.exists(directory):
raise ValueError(
t(messages.REPORT_DIRECTORY_DOES_NOT_EXIST % directory))
def check_extension(extension, path):
"""Check if .json is in the file extension."""
if extension not in path:
print(t(messages.OUTPUT_FILE_TYPE % extension))
sys.exit(1)