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"""Base Command class, and related routines"""
import os
import socket
import sys
import traceback
import time
from pip import commands
from pip.log import logger
from pip.baseparser import parser, ConfigOptionParser, UpdatingDefaultsHelpFormatter
from pip.download import urlopen
from pip.exceptions import (BadCommand, InstallationError, UninstallationError,
CommandError)
from pip.backwardcompat import StringIO, walk_packages
from pip.status_codes import SUCCESS, ERROR, UNKNOWN_ERROR, VIRTUALENV_NOT_FOUND
__all__ = ['command_dict', 'Command', 'load_all_commands',
'load_command', 'command_names']
command_dict = {}
# for backwards compatibiliy
get_proxy = urlopen.get_proxy
class Command(object):
name = None
usage = None
hidden = False
def __init__(self):
assert self.name
self.parser = ConfigOptionParser(
usage=self.usage,
prog='%s %s' % (sys.argv[0], self.name),
version=parser.version,
formatter=UpdatingDefaultsHelpFormatter(),
name=self.name)
for option in parser.option_list:
if not option.dest or option.dest == 'help':
# -h, --version, etc
continue
self.parser.add_option(option)
command_dict[self.name] = self
def merge_options(self, initial_options, options):
# Make sure we have all global options carried over
for attr in ['log', 'proxy', 'require_venv',
'log_explicit_levels', 'log_file',
'timeout', 'default_vcs',
'skip_requirements_regex',
'no_input', 'exists_action']:
setattr(options, attr, getattr(initial_options, attr) or getattr(options, attr))
options.quiet += initial_options.quiet
options.verbose += initial_options.verbose
def setup_logging(self):
pass
def main(self, args, initial_options):
options, args = self.parser.parse_args(args)
self.merge_options(initial_options, options)
level = 1 # Notify
level += options.verbose
level -= options.quiet
level = logger.level_for_integer(4-level)
complete_log = []
logger.consumers.extend(
[(level, sys.stdout),
(logger.DEBUG, complete_log.append)])
if options.log_explicit_levels:
logger.explicit_levels = True
self.setup_logging()
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 os.environ.get('VIRTUAL_ENV'):
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.consumers.append((logger.DEBUG, log_fp))
else:
log_fp = None
socket.setdefaulttimeout(options.timeout or None)
urlopen.setup(proxystr=options.proxy, prompting=not options.no_input)
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 (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 log_fp is not None:
log_fp.close()
if store_log:
log_fn = options.log_file
text = '\n'.join(complete_log)
logger.fatal('Storing complete log in %s' % log_fn)
log_fp = open_logfile(log_fn, 'w')
log_fp.write(text)
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
def load_command(name):
full_name = 'pip.commands.%s' % name
if full_name in sys.modules:
return
try:
__import__(full_name)
except ImportError:
pass
def load_all_commands():
for name in command_names():
load_command(name)
def command_names():
names = set((pkg[1] for pkg in walk_packages(path=commands.__path__)))
return list(names)
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