circuitpython/shared-bindings/dotenv/__init__.c
2022-10-03 21:56:11 -04:00

114 lines
4.2 KiB
C

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* SPDX-FileCopyrightText: Copyright (c) 2022 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <string.h>
#include "extmod/vfs.h"
#include "lib/oofatfs/ff.h"
#include "lib/oofatfs/diskio.h"
#include "py/mpstate.h"
#include "py/obj.h"
#include "py/objstr.h"
#include "py/runtime.h"
#include "shared-bindings/dotenv/__init__.h"
//| """Functions to manage environment variables from a .env file.
//|
//| A subset of the CPython `dotenv library <https://saurabh-kumar.com/python-dotenv/>`_. It does
//| not support variables or double quotes.
//|
//| Keys and values may be put in single quotes.
//| ``\`` and ``'`` are escaped by ``\`` in single quotes. Newlines can occur in quotes for multiline values.
//| Comments start with ``#`` and apply for the rest of the line.
//| A ``#`` immediately following an ``=`` is part of the value, not the start of a comment,
//| and a ``#`` embedded in a value without whitespace will be part of that value.
//| This corresponds to how assignments and comments work in most Unix shells.
//|
//|
//| File format example:
//|
//| .. code-block::
//|
//| key=value
//| key2 = value2
//| 'key3' = 'value with spaces'
//| # comment
//| key4 = value3 # comment 2
//| 'key5'=value4
//| key=value5 # overrides the first one
//| multiline = 'hello
//| world
//| how are you?'
//| # The #'s below will be included in the value. They do not start a comment.
//| key6=#value
//| key7=abc#def
//|
//| """
//|
//| import typing
//|
//| def get_key(dotenv_path: str, key_to_get: str) -> Optional[str]:
//| """Get the value for the given key from the given .env file. If the key occurs multiple
//| times in the file, then the last value will be returned.
//|
//| Returns None if the key isn't found or doesn't have a value."""
//| ...
//|
STATIC mp_obj_t _dotenv_get_key(mp_obj_t path_in, mp_obj_t key_to_get_in) {
return common_hal_dotenv_get_key(mp_obj_str_get_str(path_in),
mp_obj_str_get_str(key_to_get_in));
}
MP_DEFINE_CONST_FUN_OBJ_2(dotenv_get_key_obj, _dotenv_get_key);
//| def load_dotenv() -> None:
//| """Does nothing in CircuitPython because os.getenv will automatically read .env when
//| available.
//|
//| Present in CircuitPython so CPython-compatible code can use it without error."""
//| ...
//|
STATIC mp_obj_t dotenv_load_dotenv(void) {
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(dotenv_load_dotenv_obj, dotenv_load_dotenv);
STATIC const mp_rom_map_elem_t dotenv_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_dotenv) },
{ MP_ROM_QSTR(MP_QSTR_get_key), MP_ROM_PTR(&dotenv_get_key_obj) },
{ MP_ROM_QSTR(MP_QSTR_load_dotenv), MP_ROM_PTR(&dotenv_load_dotenv_obj) },
};
STATIC MP_DEFINE_CONST_DICT(dotenv_module_globals, dotenv_module_globals_table);
const mp_obj_module_t dotenv_module = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&dotenv_module_globals,
};
MP_REGISTER_MODULE(MP_QSTR_dotenv, dotenv_module, CIRCUITPY_DOTENV);