/usr/lib/python2.7/dist-packages/scrapy/command.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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Base class for Scrapy commands
"""
import os
import warnings
from optparse import OptionGroup
from twisted.python import failure
from scrapy.utils.conf import arglist_to_dict
from scrapy.exceptions import UsageError, ScrapyDeprecationWarning
class ScrapyCommand(object):
requires_project = False
crawler_process = None
# default settings to be used for this command instead of global defaults
default_settings = {}
exitcode = 0
def __init__(self):
self.settings = None # set in scrapy.cmdline
def set_crawler(self, crawler):
assert not hasattr(self, '_crawler'), "crawler already set"
self._crawler = crawler
@property
def crawler(self):
warnings.warn("Command's default `crawler` is deprecated and will be removed. "
"Use `create_crawler` method to instatiate crawlers.",
ScrapyDeprecationWarning)
if not hasattr(self, '_crawler'):
crawler = self.crawler_process.create_crawler()
old_start = crawler.start
self.crawler_process.started = False
def wrapped_start():
if self.crawler_process.started:
old_start()
else:
self.crawler_process.started = True
self.crawler_process.start()
crawler.start = wrapped_start
self.set_crawler(crawler)
return self._crawler
def syntax(self):
"""
Command syntax (preferably one-line). Do not include command name.
"""
return ""
def short_desc(self):
"""
A short description of the command
"""
return ""
def long_desc(self):
"""A long description of the command. Return short description when not
available. It cannot contain newlines, since contents will be formatted
by optparser which removes newlines and wraps text.
"""
return self.short_desc()
def help(self):
"""An extensive help for the command. It will be shown when using the
"help" command. It can contain newlines, since not post-formatting will
be applied to its contents.
"""
return self.long_desc()
def add_options(self, parser):
"""
Populate option parse with options available for this command
"""
group = OptionGroup(parser, "Global Options")
group.add_option("--logfile", metavar="FILE",
help="log file. if omitted stderr will be used")
group.add_option("-L", "--loglevel", metavar="LEVEL", default=None,
help="log level (default: %s)" % self.settings['LOG_LEVEL'])
group.add_option("--nolog", action="store_true",
help="disable logging completely")
group.add_option("--profile", metavar="FILE", default=None,
help="write python cProfile stats to FILE")
group.add_option("--lsprof", metavar="FILE", default=None,
help="write lsprof profiling stats to FILE")
group.add_option("--pidfile", metavar="FILE",
help="write process ID to FILE")
group.add_option("-s", "--set", action="append", default=[], metavar="NAME=VALUE",
help="set/override setting (may be repeated)")
group.add_option("--pdb", action="store_true", help="enable pdb on failure")
parser.add_option_group(group)
def process_options(self, args, opts):
try:
self.settings.setdict(arglist_to_dict(opts.set),
priority='cmdline')
except ValueError:
raise UsageError("Invalid -s value, use -s NAME=VALUE", print_help=False)
if opts.logfile:
self.settings.set('LOG_ENABLED', True, priority='cmdline')
self.settings.set('LOG_FILE', opts.logfile, priority='cmdline')
if opts.loglevel:
self.settings.set('LOG_ENABLED', True, priority='cmdline')
self.settings.set('LOG_LEVEL', opts.loglevel, priority='cmdline')
if opts.nolog:
self.settings.set('LOG_ENABLED', False, priority='cmdline')
if opts.pidfile:
with open(opts.pidfile, "w") as f:
f.write(str(os.getpid()) + os.linesep)
if opts.pdb:
failure.startDebugMode()
def run(self, args, opts):
"""
Entry point for running commands
"""
raise NotImplementedError
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