/usr/lib/python2.7/dist-packages/scrapy/cmdline.py is in python-scrapy 0.24.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import sys
import optparse
import cProfile
import inspect
import pkg_resources
import scrapy
from scrapy.crawler import CrawlerProcess
from scrapy.xlib import lsprofcalltree
from scrapy.command import ScrapyCommand
from scrapy.exceptions import UsageError
from scrapy.utils.misc import walk_modules
from scrapy.utils.project import inside_project, get_project_settings
from scrapy.settings.deprecated import check_deprecated_settings
def _iter_command_classes(module_name):
# TODO: add `name` attribute to commands and and merge this function with
# scrapy.utils.spider.iter_spider_classes
for module in walk_modules(module_name):
for obj in vars(module).itervalues():
if inspect.isclass(obj) and \
issubclass(obj, ScrapyCommand) and \
obj.__module__ == module.__name__:
yield obj
def _get_commands_from_module(module, inproject):
d = {}
for cmd in _iter_command_classes(module):
if inproject or not cmd.requires_project:
cmdname = cmd.__module__.split('.')[-1]
d[cmdname] = cmd()
return d
def _get_commands_from_entry_points(inproject, group='scrapy.commands'):
cmds = {}
for entry_point in pkg_resources.iter_entry_points(group):
obj = entry_point.load()
if inspect.isclass(obj):
cmds[entry_point.name] = obj()
else:
raise Exception("Invalid entry point %s" % entry_point.name)
return cmds
def _get_commands_dict(settings, inproject):
cmds = _get_commands_from_module('scrapy.commands', inproject)
cmds.update(_get_commands_from_entry_points(inproject))
cmds_module = settings['COMMANDS_MODULE']
if cmds_module:
cmds.update(_get_commands_from_module(cmds_module, inproject))
return cmds
def _pop_command_name(argv):
i = 0
for arg in argv[1:]:
if not arg.startswith('-'):
del argv[i]
return arg
i += 1
def _print_header(settings, inproject):
if inproject:
print("Scrapy %s - project: %s\n" % (scrapy.__version__, \
settings['BOT_NAME']))
else:
print("Scrapy %s - no active project\n" % scrapy.__version__)
def _print_commands(settings, inproject):
_print_header(settings, inproject)
print("Usage:")
print(" scrapy <command> [options] [args]\n")
print("Available commands:")
cmds = _get_commands_dict(settings, inproject)
for cmdname, cmdclass in sorted(cmds.iteritems()):
print(" %-13s %s" % (cmdname, cmdclass.short_desc()))
if not inproject:
print()
print(" [ more ] More commands available when run from project directory")
print()
print('Use "scrapy <command> -h" to see more info about a command')
def _print_unknown_command(settings, cmdname, inproject):
_print_header(settings, inproject)
print("Unknown command: %s\n" % cmdname)
print('Use "scrapy" to see available commands')
def _run_print_help(parser, func, *a, **kw):
try:
func(*a, **kw)
except UsageError as e:
if str(e):
parser.error(str(e))
if e.print_help:
parser.print_help()
sys.exit(2)
def execute(argv=None, settings=None):
if argv is None:
argv = sys.argv
# --- backwards compatibility for scrapy.conf.settings singleton ---
if settings is None and 'scrapy.conf' in sys.modules:
from scrapy import conf
if hasattr(conf, 'settings'):
settings = conf.settings
# ------------------------------------------------------------------
if settings is None:
settings = get_project_settings()
check_deprecated_settings(settings)
# --- backwards compatibility for scrapy.conf.settings singleton ---
import warnings
from scrapy.exceptions import ScrapyDeprecationWarning
with warnings.catch_warnings():
warnings.simplefilter("ignore", ScrapyDeprecationWarning)
from scrapy import conf
conf.settings = settings
# ------------------------------------------------------------------
inproject = inside_project()
cmds = _get_commands_dict(settings, inproject)
cmdname = _pop_command_name(argv)
parser = optparse.OptionParser(formatter=optparse.TitledHelpFormatter(), \
conflict_handler='resolve')
if not cmdname:
_print_commands(settings, inproject)
sys.exit(0)
elif cmdname not in cmds:
_print_unknown_command(settings, cmdname, inproject)
sys.exit(2)
cmd = cmds[cmdname]
parser.usage = "scrapy %s %s" % (cmdname, cmd.syntax())
parser.description = cmd.long_desc()
settings.setdict(cmd.default_settings, priority='command')
cmd.settings = settings
cmd.add_options(parser)
opts, args = parser.parse_args(args=argv[1:])
_run_print_help(parser, cmd.process_options, args, opts)
cmd.crawler_process = CrawlerProcess(settings)
_run_print_help(parser, _run_command, cmd, args, opts)
sys.exit(cmd.exitcode)
def _run_command(cmd, args, opts):
if opts.profile or opts.lsprof:
_run_command_profiled(cmd, args, opts)
else:
cmd.run(args, opts)
def _run_command_profiled(cmd, args, opts):
if opts.profile:
sys.stderr.write("scrapy: writing cProfile stats to %r\n" % opts.profile)
if opts.lsprof:
sys.stderr.write("scrapy: writing lsprof stats to %r\n" % opts.lsprof)
loc = locals()
p = cProfile.Profile()
p.runctx('cmd.run(args, opts)', globals(), loc)
if opts.profile:
p.dump_stats(opts.profile)
k = lsprofcalltree.KCacheGrind(p)
if opts.lsprof:
with open(opts.lsprof, 'w') as f:
k.output(f)
if __name__ == '__main__':
execute()
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