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84 lines
1.9 KiB
Python
84 lines
1.9 KiB
Python
from __future__ import print_function
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import io
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import logging
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import re
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import sys
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_LOGGER = logging.getLogger(__name__)
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class Registry(dict):
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def register(self, name):
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def decorator(fun):
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self[name] = fun
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return fun
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return decorator
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class ServiceRegistry(dict):
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def register(self, name, validator):
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def decorator(fun):
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self[name] = (validator, fun)
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return fun
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return decorator
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def safe_print(message=""):
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try:
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print(message)
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return
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except UnicodeEncodeError:
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pass
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try:
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print(message.encode('ascii', 'backslashreplace'))
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except UnicodeEncodeError:
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print("Cannot print line because of invalid locale!")
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def shlex_quote(s):
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if not s:
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return u"''"
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if re.search(r'[^\w@%+=:,./-]', s) is None:
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return s
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return u"'" + s.replace(u"'", u"'\"'\"'") + u"'"
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def run_external_command(func, *cmd, **kwargs):
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def mock_exit(return_code):
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raise SystemExit(return_code)
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orig_argv = sys.argv
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orig_exit = sys.exit # mock sys.exit
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full_cmd = u' '.join(shlex_quote(x) for x in cmd)
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_LOGGER.info(u"Running: %s", full_cmd)
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capture_stdout = kwargs.get('capture_stdout', False)
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if capture_stdout:
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sys.stdout = io.BytesIO()
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try:
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sys.argv = list(cmd)
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sys.exit = mock_exit
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return func() or 0
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except KeyboardInterrupt:
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return 1
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except SystemExit as err:
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return err.args[0]
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except Exception as err: # pylint: disable=broad-except
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_LOGGER.error(u"Running command failed: %s", err)
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_LOGGER.error(u"Please try running %s locally.", full_cmd)
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finally:
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sys.argv = orig_argv
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sys.exit = orig_exit
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if capture_stdout:
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# pylint: disable=lost-exception
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stdout = sys.stdout.getvalue()
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sys.stdout = sys.__stdout__
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return stdout
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