# ================================================================= # # Authors: Tom Kralidis <tomkralidis@gmail.com> # # Copyright (c) 2014 Tom Kralidis # # 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. # # ================================================================= import os import sys import logging from flask import Flask from flask_sqlalchemy import SQLAlchemy from flask_babel import Babel LOGGER = logging.getLogger(__name__) def to_list(obj): obj_type = type(obj) if obj_type is str: return obj.replace(' ', '').split(',') elif obj_type is list: return obj elif obj_type is set: return list(obj) else: raise TypeError('unknown type for Plugin: %s' + str(obj_type)) class App: """ Singleton: sole static instance of Flask App """ app_instance = None db_instance = None babel_instance = None plugins_instance = None home_dir = None count = 0 @staticmethod def init(): # Do init once app = Flask(__name__) # Read and override configs app.config.from_pyfile('config_main.py') app.config.from_pyfile('../instance/config_site.py') app.config.from_envvar('GHC_SETTINGS', silent=True) # Global Logging config logging.basicConfig(level=int(app.config['GHC_LOG_LEVEL']), format=app.config['GHC_LOG_FORMAT']) app.config['GHC_SITE_URL'] = \ app.config['GHC_SITE_URL'].rstrip('/') app.secret_key = app.config['SECRET_KEY'] App.db_instance = SQLAlchemy(app) App.babel_instance = Babel(app) # Plugins (via Docker ENV) must be list, but may have been # specified as comma-separated string, or older set notation app.config['GHC_PLUGINS'] = to_list(app.config['GHC_PLUGINS']) app.config['GHC_USER_PLUGINS'] = \ to_list(app.config['GHC_USER_PLUGINS']) # Concatenate core- and user-Plugins App.plugins_instance = \ app.config['GHC_PLUGINS'] + app.config['GHC_USER_PLUGINS'] # Needed to find Plugins home_dir = os.path.dirname(os.path.abspath(__file__)) App.home_dir = sys.path.append('%s/..' % home_dir) # Finally assign app-instance App.app_instance = app App.count += 1 LOGGER.info("created GHC App instance #%d" % App.count) @staticmethod def get_app(): return App.app_instance @staticmethod def get_babel(): return App.babel_instance @staticmethod def get_config(): return App.app_instance.config @staticmethod def get_db(): return App.db_instance @staticmethod def get_home_dir(): return App.home_dir @staticmethod def get_plugins(): return App.plugins_instance App.init()