openmedialibrary_platform/Darwin/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg/pip/basecommand.py
2014-09-05 18:01:36 +02:00

201 lines
6.4 KiB
Python

"""Base Command class, and related routines"""
import os
import sys
import tempfile
import traceback
import time
import optparse
from pip import cmdoptions
from pip.locations import running_under_virtualenv
from pip.log import logger
from pip.download import PipSession
from pip.exceptions import (BadCommand, InstallationError, UninstallationError,
CommandError, PreviousBuildDirError)
from pip.backwardcompat import StringIO
from pip.baseparser import ConfigOptionParser, UpdatingDefaultsHelpFormatter
from pip.status_codes import (SUCCESS, ERROR, UNKNOWN_ERROR, VIRTUALENV_NOT_FOUND,
PREVIOUS_BUILD_DIR_ERROR)
from pip.util import get_prog
__all__ = ['Command']
class Command(object):
name = None
usage = None
hidden = False
def __init__(self):
parser_kw = {
'usage': self.usage,
'prog': '%s %s' % (get_prog(), self.name),
'formatter': UpdatingDefaultsHelpFormatter(),
'add_help_option': False,
'name': self.name,
'description': self.__doc__,
}
self.parser = ConfigOptionParser(**parser_kw)
# Commands should add options to this option group
optgroup_name = '%s Options' % self.name.capitalize()
self.cmd_opts = optparse.OptionGroup(self.parser, optgroup_name)
# Add the general options
gen_opts = cmdoptions.make_option_group(cmdoptions.general_group, self.parser)
self.parser.add_option_group(gen_opts)
def _build_session(self, options):
session = PipSession()
# Handle custom ca-bundles from the user
if options.cert:
session.verify = options.cert
# Handle timeouts
if options.timeout:
session.timeout = options.timeout
# Handle configured proxies
if options.proxy:
session.proxies = {
"http": options.proxy,
"https": options.proxy,
}
# Determine if we can prompt the user for authentication or not
session.auth.prompting = not options.no_input
return session
def setup_logging(self):
pass
def parse_args(self, args):
# factored out for testability
return self.parser.parse_args(args)
def main(self, args):
options, args = self.parse_args(args)
level = 1 # Notify
level += options.verbose
level -= options.quiet
level = logger.level_for_integer(4 - level)
complete_log = []
logger.add_consumers(
(level, sys.stdout),
(logger.DEBUG, complete_log.append),
)
if options.log_explicit_levels:
logger.explicit_levels = True
self.setup_logging()
#TODO: try to get these passing down from the command?
# without resorting to os.environ to hold these.
if options.no_input:
os.environ['PIP_NO_INPUT'] = '1'
if options.exists_action:
os.environ['PIP_EXISTS_ACTION'] = ' '.join(options.exists_action)
if options.require_venv:
# If a venv is required check if it can really be found
if not running_under_virtualenv():
logger.fatal('Could not find an activated virtualenv (required).')
sys.exit(VIRTUALENV_NOT_FOUND)
if options.log:
log_fp = open_logfile(options.log, 'a')
logger.add_consumers((logger.DEBUG, log_fp))
else:
log_fp = None
exit = SUCCESS
store_log = False
try:
status = self.run(options, args)
# FIXME: all commands should return an exit status
# and when it is done, isinstance is not needed anymore
if isinstance(status, int):
exit = status
except PreviousBuildDirError:
e = sys.exc_info()[1]
logger.fatal(str(e))
logger.info('Exception information:\n%s' % format_exc())
store_log = True
exit = PREVIOUS_BUILD_DIR_ERROR
except (InstallationError, UninstallationError):
e = sys.exc_info()[1]
logger.fatal(str(e))
logger.info('Exception information:\n%s' % format_exc())
store_log = True
exit = ERROR
except BadCommand:
e = sys.exc_info()[1]
logger.fatal(str(e))
logger.info('Exception information:\n%s' % format_exc())
store_log = True
exit = ERROR
except CommandError:
e = sys.exc_info()[1]
logger.fatal('ERROR: %s' % e)
logger.info('Exception information:\n%s' % format_exc())
exit = ERROR
except KeyboardInterrupt:
logger.fatal('Operation cancelled by user')
logger.info('Exception information:\n%s' % format_exc())
store_log = True
exit = ERROR
except:
logger.fatal('Exception:\n%s' % format_exc())
store_log = True
exit = UNKNOWN_ERROR
if store_log:
log_file_fn = options.log_file
text = '\n'.join(complete_log)
try:
log_file_fp = open_logfile(log_file_fn, 'w')
except IOError:
temp = tempfile.NamedTemporaryFile(delete=False)
log_file_fn = temp.name
log_file_fp = open_logfile(log_file_fn, 'w')
logger.fatal('Storing debug log for failure in %s' % log_file_fn)
log_file_fp.write(text)
log_file_fp.close()
if log_fp is not None:
log_fp.close()
return exit
def format_exc(exc_info=None):
if exc_info is None:
exc_info = sys.exc_info()
out = StringIO()
traceback.print_exception(*exc_info, **dict(file=out))
return out.getvalue()
def open_logfile(filename, mode='a'):
"""Open the named log file in append mode.
If the file already exists, a separator will also be printed to
the file to separate past activity from current activity.
"""
filename = os.path.expanduser(filename)
filename = os.path.abspath(filename)
dirname = os.path.dirname(filename)
if not os.path.exists(dirname):
os.makedirs(dirname)
exists = os.path.exists(filename)
log_fp = open(filename, mode)
if exists:
log_fp.write('%s\n' % ('-' * 60))
log_fp.write('%s run on %s\n' % (sys.argv[0], time.strftime('%c')))
return log_fp