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use pkg_resources

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This change uses if no path for e capabilities-file is supplied a
temporary file created by pkg_resources, which should be more robust
than directly accessing the file. (This failed sometimes, for example
in zipped distributions or uncommon structures)
This commit is contained in:
Patrick Kanzler
2020-05-11 22:43:44 +02:00
parent cbe412cfdb
commit b9e3827867
3 changed files with 6 additions and 3 deletions
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7
src/escpos/capabilities.py
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@@ -1,5 +1,6 @@
import re
from os import environ, path
import pkg_resources
import pickle
import logging
import time
@@ -15,9 +16,9 @@ logger = logging.getLogger(__name__)
pickle_dir = environ.get('ESCPOS_CAPABILITIES_PICKLE_DIR', gettempdir())
pickle_path = path.join(pickle_dir, '{v}.capabilities.pickle'.format(v=platform.python_version()))
capabilities_path = environ.get(
'ESCPOS_CAPABILITIES_FILE',
path.join(path.dirname(__file__), 'capabilities.json'))
# get a temporary file from pkg_resources if no file is specified in env
capabilities_path = environ.get('ESCPOS_CAPABILITIES_FILE',
pkg_resources.resource_filename(__name__, 'capabilities.json'))
# Load external printer database
t0 = time.time()