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create_my_functions.py
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create_my_functions.py
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import sys
import os, tempfile
import errno
from os import listdir
from os.path import isfile, join
import json
import yaml
def main():
argv = sys.argv
myfunctions = []
for arg in argv[1:]:
if is_path_exists_or_creatable(arg) and arg.endswith(".yml"):
functionsdata = parse_yml_file(arg)
myfunctions = myfunctions + functionsdata
else:
print("Argument " + arg + " is no a valid .yml file")
return 1
create_my_functions_file(myfunctions)
return 0
def parse_yml_file(filename) -> {}:
functionsdata = []
with open(filename, "r") as stream:
try:
function = yaml.load(stream)
for key in function['functions']:
data = {}
data['name'] = key
data['address'] = "function/" + key
try:
data['cloudOnly'] = function['functions'][key]['extras']['cloudOnly']
except Exception as e:
data['cloudOnly'] = False
try:
data['localOnly'] = function['functions'][key]['extras']['localOnly']
except Exception as e:
data['localOnly'] = False
# print(data)
functionsdata.append(data)
except yaml.YAMLError as exc:
print(exc)
return functionsdata
def create_my_functions_file(myfunctions: []):
directory = '.config'
if not os.path.exists(directory):
os.makedirs(directory)
with open(directory +'/' + 'my_functions.json', 'w') as outfile:
json.dump(myfunctions, outfile, indent=4)
# Sadly, Python fails to provide the following magic number for us.
ERROR_INVALID_NAME = 123
'''
Windows-specific error code indicating an invalid pathname.
See Also
----------
https://msdn.microsoft.com/en-us/library/windows/desktop/ms681382%28v=vs.85%29.aspx
Official listing of all such codes.
'''
def is_pathname_valid(pathname: str) -> bool:
'''
`True` if the passed pathname is a valid pathname for the current OS;
`False` otherwise.
'''
# If this pathname is either not a string or is but is empty, this pathname
# is invalid.
try:
if not isinstance(pathname, str) or not pathname:
return False
# Strip this pathname's Windows-specific drive specifier (e.g., `C:\`)
# if any. Since Windows prohibits path components from containing `:`
# characters, failing to strip this `:`-suffixed prefix would
# erroneously invalidate all valid absolute Windows pathnames.
_, pathname = os.path.splitdrive(pathname)
# Directory guaranteed to exist. If the current OS is Windows, this is
# the drive to which Windows was installed (e.g., the "%HOMEDRIVE%"
# environment variable); else, the typical root directory.
root_dirname = os.environ.get('HOMEDRIVE', 'C:') \
if sys.platform == 'win32' else os.path.sep
assert os.path.isdir(root_dirname) # ...Murphy and her ironclad Law
# Append a path separator to this directory if needed.
root_dirname = root_dirname.rstrip(os.path.sep) + os.path.sep
# Test whether each path component split from this pathname is valid or
# not, ignoring non-existent and non-readable path components.
for pathname_part in pathname.split(os.path.sep):
try:
os.lstat(root_dirname + pathname_part)
# If an OS-specific exception is raised, its error code
# indicates whether this pathname is valid or not. Unless this
# is the case, this exception implies an ignorable kernel or
# filesystem complaint (e.g., path not found or inaccessible).
#
# Only the following exceptions indicate invalid pathnames:
#
# * Instances of the Windows-specific "WindowsError" class
# defining the "winerror" attribute whose value is
# "ERROR_INVALID_NAME". Under Windows, "winerror" is more
# fine-grained and hence useful than the generic "errno"
# attribute. When a too-long pathname is passed, for example,
# "errno" is "ENOENT" (i.e., no such file or directory) rather
# than "ENAMETOOLONG" (i.e., file name too long).
# * Instances of the cross-platform "OSError" class defining the
# generic "errno" attribute whose value is either:
# * Under most POSIX-compatible OSes, "ENAMETOOLONG".
# * Under some edge-case OSes (e.g., SunOS, *BSD), "ERANGE".
except OSError as exc:
if hasattr(exc, 'winerror'):
if exc.winerror == ERROR_INVALID_NAME:
return False
elif exc.errno in {errno.ENAMETOOLONG, errno.ERANGE}:
return False
# If a "TypeError" exception was raised, it almost certainly has the
# error message "embedded NUL character" indicating an invalid pathname.
except TypeError as exc:
return False
# If no exception was raised, all path components and hence this
# pathname itself are valid. (Praise be to the curmudgeonly python.)
else:
return True
# If any other exception was raised, this is an unrelated fatal issue
# (e.g., a bug). Permit this exception to unwind the call stack.
#
# Did we mention this should be shipped with Python already?
def is_path_creatable(pathname: str) -> bool:
'''
`True` if the current user has sufficient permissions to create the passed
pathname; `False` otherwise.
'''
# Parent directory of the passed path. If empty, we substitute the current
# working directory (CWD) instead.
dirname = os.path.dirname(pathname) or os.getcwd()
return os.access(dirname, os.W_OK)
def is_path_exists_or_creatable(pathname: str) -> bool:
'''
`True` if the passed pathname is a valid pathname for the current OS _and_
either currently exists or is hypothetically creatable; `False` otherwise.
This function is guaranteed to _never_ raise exceptions.
'''
try:
# To prevent "os" module calls from raising undesirable exceptions on
# invalid pathnames, is_pathname_valid() is explicitly called first.
return is_pathname_valid(pathname) and (
os.path.exists(pathname) or is_path_creatable(pathname))
# Report failure on non-fatal filesystem complaints (e.g., connection
# timeouts, permissions issues) implying this path to be inaccessible. All
# other exceptions are unrelated fatal issues and should not be caught here.
except OSError:
return false
if __name__ == "__main__":
main()