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from __future__ import annotations
from typing import TYPE_CHECKING, cast
from twisted.python.failure import Failure
from scrapy.commands import BaseRunSpiderCommand
from scrapy.exceptions import UsageError
if TYPE_CHECKING:
import argparse
class Command(BaseRunSpiderCommand):
requires_project = True
def syntax(self) -> str:
return "[options] <spider>"
def short_desc(self) -> str:
return "Run a spider"
def run(self, args: list[str], opts: argparse.Namespace) -> None:
if len(args) < 1:
raise UsageError
if len(args) > 1:
raise UsageError(
"running 'scrapy crawl' with more than one spider is not supported"
)
spname = args[0]
assert self.crawler_process
crawl_defer = self.crawler_process.crawl(spname, **opts.spargs)
if getattr(crawl_defer, "result", None) is not None and issubclass(
cast(Failure, crawl_defer.result).type, Exception
):
self.exitcode = 1
else:
self.crawler_process.start()
if self.crawler_process.bootstrap_failed or (
hasattr(self.crawler_process, "has_exception")
and self.crawler_process.has_exception
):
self.exitcode = 1
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