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"""Base Command class, and related routines"""
from cStringIO import StringIO
import getpass
import os
import socket
import sys
import traceback
import time
import urllib
import urllib2
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
from pip.venv import restart_in_venv
from pip.backwardcompat import walk_packages
__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', 'venv', 'proxy', 'venv_base', 'require_venv',
'respect_venv', 'log_explicit_levels', 'log_file',
'timeout', 'default_vcs', 'skip_requirements_regex',
'no_input']:
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, complete_args, 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.require_venv and not options.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(3)
# Automatically install in currently activated venv if required
options.respect_venv = True
if args and args[-1] == '___VENV_RESTART___':
## FIXME: We don't do anything this this value yet:
args = args[:-2]
options.venv = None
else:
# If given the option to respect the activated environment
# check if no venv is given as a command line parameter
if options.respect_venv and os.environ.get('VIRTUAL_ENV'):
if options.venv and os.path.exists(options.venv):
# Make sure command line venv and environmental are the same
if (os.path.realpath(os.path.expanduser(options.venv)) !=
os.path.realpath(os.environ.get('VIRTUAL_ENV'))):
logger.fatal("Given virtualenv (%s) doesn't match "
"currently activated virtualenv (%s)."
% (options.venv, os.environ.get('VIRTUAL_ENV')))
sys.exit(3)
else:
options.venv = os.environ.get('VIRTUAL_ENV')
logger.info('Using already activated environment %s' % options.venv)
if options.venv:
logger.info('Running in environment %s' % options.venv)
site_packages=False
if options.site_packages:
site_packages=True
restart_in_venv(options.venv, options.venv_base, site_packages,
complete_args)
# restart_in_venv should actually never return, but for clarity...
return
## FIXME: not sure if this sure come before or after venv restart
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 = 0
try:
self.run(options, args)
except (InstallationError, UninstallationError), e:
logger.fatal(str(e))
logger.info('Exception information:\n%s' % format_exc())
exit = 1
except BadCommand, e:
logger.fatal(str(e))
logger.info('Exception information:\n%s' % format_exc())
exit = 1
except:
logger.fatal('Exception:\n%s' % format_exc())
exit = 2
if log_fp is not None:
log_fp.close()
if exit:
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:
print >> log_fp, '-'*60
print >> log_fp, '%s run on %s' % (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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