ab35121864
* Fix typos * Downgrade mistune version * Fix blueprint host param Co-authored-by: Adam Hopkins <admhpkns@gmail.com> Co-authored-by: Adam Hopkins <adam@amhopkins.com>
133 lines
4.3 KiB
Python
133 lines
4.3 KiB
Python
import types
|
|
|
|
from importlib.util import module_from_spec, spec_from_file_location
|
|
from os import environ as os_environ
|
|
from pathlib import Path
|
|
from re import findall as re_findall
|
|
from typing import Union
|
|
|
|
from sanic.exceptions import LoadFileException, PyFileError
|
|
from sanic.helpers import import_string
|
|
|
|
|
|
def str_to_bool(val: str) -> bool:
|
|
"""Takes string and tries to turn it into bool as human would do.
|
|
|
|
If val is in case insensitive (
|
|
"y", "yes", "yep", "yup", "t",
|
|
"true", "on", "enable", "enabled", "1"
|
|
) returns True.
|
|
If val is in case insensitive (
|
|
"n", "no", "f", "false", "off", "disable", "disabled", "0"
|
|
) returns False.
|
|
Else Raise ValueError."""
|
|
|
|
val = val.lower()
|
|
if val in {
|
|
"y",
|
|
"yes",
|
|
"yep",
|
|
"yup",
|
|
"t",
|
|
"true",
|
|
"on",
|
|
"enable",
|
|
"enabled",
|
|
"1",
|
|
}:
|
|
return True
|
|
elif val in {"n", "no", "f", "false", "off", "disable", "disabled", "0"}:
|
|
return False
|
|
else:
|
|
raise ValueError(f"Invalid truth value {val}")
|
|
|
|
|
|
def load_module_from_file_location(
|
|
location: Union[bytes, str, Path], encoding: str = "utf8", *args, **kwargs
|
|
): # noqa
|
|
"""Returns loaded module provided as a file path.
|
|
|
|
:param args:
|
|
Corresponds to importlib.util.spec_from_file_location location
|
|
parameters,but with this differences:
|
|
- It has to be of a string or bytes type.
|
|
- You can also use here environment variables
|
|
in format ${some_env_var}.
|
|
Mark that $some_env_var will not be resolved as environment variable.
|
|
:encoding:
|
|
If location parameter is of a bytes type, then use this encoding
|
|
to decode it into string.
|
|
:param args:
|
|
Corresponds to the rest of importlib.util.spec_from_file_location
|
|
parameters.
|
|
:param kwargs:
|
|
Corresponds to the rest of importlib.util.spec_from_file_location
|
|
parameters.
|
|
|
|
For example You can:
|
|
|
|
some_module = load_module_from_file_location(
|
|
"some_module_name",
|
|
"/some/path/${some_env_var}"
|
|
)
|
|
"""
|
|
if isinstance(location, bytes):
|
|
location = location.decode(encoding)
|
|
|
|
if isinstance(location, Path) or "/" in location or "$" in location:
|
|
|
|
if not isinstance(location, Path):
|
|
# A) Check if location contains any environment variables
|
|
# in format ${some_env_var}.
|
|
env_vars_in_location = set(re_findall(r"\${(.+?)}", location))
|
|
|
|
# B) Check these variables exists in environment.
|
|
not_defined_env_vars = env_vars_in_location.difference(
|
|
os_environ.keys()
|
|
)
|
|
if not_defined_env_vars:
|
|
raise LoadFileException(
|
|
"The following environment variables are not set: "
|
|
f"{', '.join(not_defined_env_vars)}"
|
|
)
|
|
|
|
# C) Substitute them in location.
|
|
for env_var in env_vars_in_location:
|
|
location = location.replace(
|
|
"${" + env_var + "}", os_environ[env_var]
|
|
)
|
|
|
|
location = str(location)
|
|
if ".py" in location:
|
|
name = location.split("/")[-1].split(".")[
|
|
0
|
|
] # get just the file name without path and .py extension
|
|
_mod_spec = spec_from_file_location(
|
|
name, location, *args, **kwargs
|
|
)
|
|
assert _mod_spec is not None # type assertion for mypy
|
|
module = module_from_spec(_mod_spec)
|
|
_mod_spec.loader.exec_module(module) # type: ignore
|
|
|
|
else:
|
|
module = types.ModuleType("config")
|
|
module.__file__ = str(location)
|
|
try:
|
|
with open(location) as config_file:
|
|
exec( # nosec
|
|
compile(config_file.read(), location, "exec"),
|
|
module.__dict__,
|
|
)
|
|
except IOError as e:
|
|
e.strerror = "Unable to load configuration file (e.strerror)"
|
|
raise
|
|
except Exception as e:
|
|
raise PyFileError(location) from e
|
|
|
|
return module
|
|
else:
|
|
try:
|
|
return import_string(location)
|
|
except ValueError:
|
|
raise IOError("Unable to load configuration %s" % str(location))
|