config.py

import os
import urllib.parse

basedir = os.path.abspath(os.path.dirname(__file__))

# Environment variables
if os.path.exists('config.env'):
    print('Importing environment from .env file')
    for line in open('config.env'):
        var = line.strip().split('=')
        if len(var) == 2:
            os.environ[var[0]] = var[1].replace("\"", "")

class Config:
    APP_NAME = os.environ.get('APP_NAME')

    if os.environ.get('SECRET_KEY'):
        SECRET_KEY = os.environ.get('SECRET_KEY')
    else:
        SECRET_KEY = 'SECRET_KEY_ENV_VAR_NOT_SET'
        print('SECRET KEY ENV VAR NOT SET! SHOULD NOT SEE IN PRODUCTION')
    SQLALCHEMY_COMMIT_ON_TEARDOWN = True
    SQLALCHEMY_TRACK_MODIFICATIONS = False

    # Email
    MAIL_SERVER = os.environ.get('MAIL_SERVER')
    MAIL_PORT = os.environ.get('MAIL_PORT') or 587
    MAIL_USE_TLS = os.environ.get('MAIL_USE_TLS') or True
    MAIL_USE_SSL = os.environ.get('MAIL_USE_SSL') or False
    MAIL_USERNAME = os.environ.get('MAIL_USERNAME')
    MAIL_PASSWORD = os.environ.get('MAIL_PASSWORD')
    MAIL_DEFAULT_SENDER = os.environ.get('MAIL_DEFAULT_SENDER')

    # Admin account
    ADMIN_PASSWORD = os.environ.get('ADMIN_PASSWORD') or 'password'
    ADMIN_EMAIL = os.environ.get('ADMIN_EMAIL')
    EMAIL_SUBJECT_PREFIX = '[{}]'.format(APP_NAME)
    EMAIL_SENDER = '{app_name} Admin <{email}>'.format(
        app_name=APP_NAME, email=MAIL_USERNAME)

    # AWS
    FLASKS3_BUCKET_NAME = os.environ.get('FLASKS3_BUCKET_NAME')
    FLASKS3_URL_STYLE = os.environ.get('FLASKS3_URL_STYLE')
    FLASKS3_BUCKET_DOMAIN = os.environ.get('FLASKS3_BUCKET_DOMAIN')
    AWS_ACCESS_KEY_ID = os.environ.get('AWS_ACCESS_KEY_ID')
    AWS_SECRET_ACCESS_KEY = os.environ.get('AWS_SECRET_ACCESS_KEY')

    @staticmethod
    def init_app(app):
        pass

class DevelopmentConfig(Config):
    DEBUG = True
    ASSETS_DEBUG = True
    SQLALCHEMY_DATABASE_URI = os.environ.get('DEV_DATABASE_URL') or \
        'sqlite:///' + os.path.join(basedir, 'data-dev.sqlite')

class ProductionConfig(Config):
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL')
    SSL_DISABLE = (os.environ.get('SSL_DISABLE') or 'True') == 'True'

    @classmethod
    def init_app(cls, app):
        Config.init_app(app)
        assert os.environ.get('SECRET_KEY'), 'SECRET_KEY IS NOT SET!'

config = {
    'development': DevelopmentConfig,
    'production': ProductionConfig
}