1# 2# Gramps - a GTK+/GNOME based genealogy program 3# 4# Copyright (C) 2013 John Ralls <jralls@ceridwen.us> 5# 6# This program is free software; you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation; either version 2 of the License, or 9# (at your option) any later version. 10# 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15# 16# You should have received a copy of the GNU General Public License 17# along with this program; if not, write to the Free Software 18# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 19# 20import sys 21import os 22import logging 23LOG = logging.getLogger("ResourcePath") 24_hdlr = logging.StreamHandler() 25_hdlr.setFormatter(logging.Formatter(fmt="%(name)s.%(levelname)s: %(message)s")) 26LOG.addHandler(_hdlr) 27 28from ..constfunc import get_env_var 29 30class ResourcePath: 31 """ 32 ResourcePath is a singleton, meaning that only one of them is ever 33 created. At startup it finds the paths to Gramps's resource files and 34 caches them for future use. 35 36 It should be called only by const.py; other code should retrieve the 37 paths from there. 38 """ 39 instance = None 40 def __new__(cls): 41 if not cls.instance: 42 cls.instance = super(ResourcePath, cls).__new__(cls) 43 cls.instance.initialized = False 44 45 return cls.instance 46 47 def __init__(self): 48 if self.initialized: 49 return 50 resource_file = os.path.join(os.path.abspath(os.path.dirname( 51 __file__)), 'resource-path') 52 installed = os.path.exists(resource_file) 53 if installed: 54 test_path = os.path.join("gramps", "authors.xml") 55 else: 56 test_path = os.path.join("data", "authors.xml") 57 resource_path = None 58 tmp_path = get_env_var('GRAMPS_RESOURCES') 59 if (tmp_path and os.path.exists(os.path.join(tmp_path, test_path))): 60 resource_path = tmp_path 61 elif installed: 62 try: 63 with open(resource_file, encoding='utf-8', 64 errors='strict') as fp: 65 resource_path = fp.readline() 66 except UnicodeError as err: 67 LOG.exception("Encoding error while parsing resource path", err) 68 sys.exit(1) 69 except IOError as err: 70 LOG.exception("Failed to open resource file", err) 71 sys.exit(1) 72 if not os.path.exists(os.path.join(resource_path, test_path)): 73 LOG.error("Resource Path %s is invalid", resource_path) 74 sys.exit(1) 75 else: 76 # Let's try to run from source without env['GRAMPS_RESOURCES']: 77 resource_path = os.path.join(os.path.abspath(os.path.dirname( 78 __file__)), '..', "..", "..") 79 test_path = os.path.join("data", "authors.xml") 80 if (not os.path.exists(os.path.join(resource_path, test_path))): 81 LOG.error("Unable to determine resource path") 82 sys.exit(1) 83 84 resource_path = os.path.abspath(resource_path) 85 if installed: 86 self.locale_dir = os.path.join(resource_path, 'locale') 87 self.data_dir = os.path.join(resource_path, 'gramps') 88 self.image_dir = os.path.join(resource_path, 'gramps', 'images') 89 self.doc_dir = os.path.join(resource_path, 'doc', 'gramps') 90 91 else: 92 self.locale_dir = os.path.join(resource_path, 'build', 'mo') 93 self.image_dir = os.path.join(resource_path, 'images') 94 self.data_dir = os.path.join(resource_path, 'data') 95 self.doc_dir = os.path.join(resource_path, 'build', 'data') 96 97 self.initialized = True 98 99 100