mirror of
https://github.com/Garmelon/PFERD.git
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afac22c562
If the event loop is stopped while something holds the exclusive output, the "log" singleton is now reset so the main thread can print a few more messages before exiting.
134 lines
4.0 KiB
Python
134 lines
4.0 KiB
Python
import argparse
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import asyncio
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import configparser
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from pathlib import Path
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from .cli import PARSER, load_default_section
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from .config import Config, ConfigDumpError, ConfigLoadError, ConfigOptionError
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from .logging import log
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from .pferd import Pferd
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from .version import NAME, VERSION
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def load_config_parser(args: argparse.Namespace) -> configparser.ConfigParser:
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log.explain_topic("Loading config")
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parser = configparser.ConfigParser()
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if args.command is None:
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log.explain("No CLI command specified, loading config from file")
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Config.load_parser(parser, path=args.config)
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else:
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log.explain(f"CLI command specified, creating config for {args.command!r}")
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if args.command:
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args.command(args, parser)
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load_default_section(args, parser)
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prune_crawlers(args, parser)
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return parser
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def prune_crawlers(
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args: argparse.Namespace,
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parser: configparser.ConfigParser,
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) -> None:
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if not args.crawler:
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return
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for section in parser.sections():
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if section.startswith("crawl:"):
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# TODO Use removeprefix() when switching to 3.9
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name = section[len("crawl:"):]
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if name not in args.crawler:
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parser.remove_section(section)
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# TODO Check if crawlers actually exist
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def load_config(args: argparse.Namespace) -> Config:
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try:
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return Config(load_config_parser(args))
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except ConfigLoadError as e:
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log.error(str(e))
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log.error_contd(e.reason)
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exit(1)
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def configure_logging_from_args(args: argparse.Namespace) -> None:
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if args.explain is not None:
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log.output_explain = args.explain
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# We want to prevent any unnecessary output if we're printing the config to
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# stdout, otherwise it would not be a valid config file.
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if args.dump_config == "-":
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log.output_explain = False
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def configure_logging_from_config(args: argparse.Namespace, config: Config) -> None:
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# In configure_logging_from_args(), all normal logging is already disabled
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# whenever we dump the config. We don't want to override that decision with
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# values from the config file.
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if args.dump_config == "-":
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return
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try:
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if args.explain is None:
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log.output_explain = config.default_section.explain()
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except ConfigOptionError as e:
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log.error(str(e))
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exit(1)
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def dump_config(args: argparse.Namespace, config: Config) -> None:
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try:
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if args.dump_config is True:
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config.dump()
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elif args.dump_config == "-":
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config.dump_to_stdout()
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else:
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config.dump(Path(args.dump_config))
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except ConfigDumpError as e:
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log.error(str(e))
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log.error_contd(e.reason)
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exit(1)
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def main() -> None:
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args = PARSER.parse_args()
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if args.version:
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print(f"{NAME} {VERSION}")
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exit()
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# Configuring logging happens in two stages because CLI args have
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# precedence over config file options and loading the config already
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# produces some kinds of log messages (usually only explain()-s).
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configure_logging_from_args(args)
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config = load_config(args)
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# Now, after loading the config file, we can apply its logging settings in
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# all places that were not already covered by CLI args.
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configure_logging_from_config(args, config)
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if args.dump_config is not None:
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dump_config(args, config)
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exit()
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pferd = Pferd(config)
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try:
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asyncio.run(pferd.run())
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except KeyboardInterrupt:
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log.unlock()
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log.explain_topic("Interrupted, exiting immediately")
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log.explain("Open files and connections are left for the OS to clean up")
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log.explain("Temporary files are not cleaned up")
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# TODO Clean up tmp files
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# And when those files *do* actually get cleaned up properly,
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# reconsider what exit code to use here.
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exit(1)
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except Exception:
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log.unlock()
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log.unexpected_exception()
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exit(1)
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