mirror of
https://github.com/nvbn/thefuck.git
synced 2025-01-31 10:11:14 +00:00
122 lines
3.5 KiB
Python
122 lines
3.5 KiB
Python
from collections import namedtuple
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from imp import load_source
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from pathlib import Path
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from os.path import expanduser
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from subprocess import Popen, PIPE
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import os
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import sys
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from psutil import Process, TimeoutExpired
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Command = namedtuple('Command', ('script', 'stdout', 'stderr'))
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Rule = namedtuple('Rule', ('match', 'get_new_command'))
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def setup_user_dir():
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"""Returns user config dir, create it when it doesn't exist."""
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user_dir = Path(expanduser('~/.thefuck'))
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rules_dir = user_dir.joinpath('rules')
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if not rules_dir.is_dir():
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rules_dir.mkdir(parents=True)
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user_dir.joinpath('settings.py').touch()
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return user_dir
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def get_settings(user_dir):
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"""Returns prepared settings module."""
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settings = load_source('settings',
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str(user_dir.joinpath('settings.py')))
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settings.__dict__.setdefault('rules', None)
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settings.__dict__.setdefault('wait_command', 3)
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return settings
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def is_rule_enabled(settings, rule):
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"""Returns `True` when rule mentioned in `rules` or `rules`
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isn't defined.
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"""
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return settings.rules is None or rule.name[:-3] in settings.rules
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def load_rule(rule):
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"""Imports rule module and returns it."""
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rule_module = load_source(rule.name[:-3], str(rule))
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return Rule(rule_module.match, rule_module.get_new_command)
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def get_rules(user_dir, settings):
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"""Returns all enabled rules."""
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bundled = Path(__file__).parent\
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.joinpath('rules')\
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.glob('*.py')
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user = user_dir.joinpath('rules').glob('*.py')
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return [load_rule(rule) for rule in list(bundled) + list(user)
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if rule.name != '__init__.py' and is_rule_enabled(settings, rule)]
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def wait_output(settings, popen):
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"""Returns `True` if we can get output of the command in the
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`wait_command` time.
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Command will be killed if it wasn't finished in the time.
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"""
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proc = Process(popen.pid)
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try:
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proc.wait(settings.wait_command)
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return True
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except TimeoutExpired:
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for child in proc.get_children(recursive=True):
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child.kill()
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proc.kill()
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return False
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def get_command(settings, args):
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"""Creates command from `args` and executes it."""
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script = ' '.join(args[1:])
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result = Popen(script, shell=True, stdout=PIPE, stderr=PIPE,
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env=dict(os.environ, LANG='C'))
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if wait_output(settings, result):
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return Command(script, result.stdout.read().decode('utf-8'),
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result.stderr.read().decode('utf-8'))
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def get_matched_rule(command, rules, settings):
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"""Returns first matched rule for command."""
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for rule in rules:
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if rule.match(command, settings):
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return rule
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def run_rule(rule, command, settings):
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"""Runs command from rule for passed command."""
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new_command = rule.get_new_command(command, settings)
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sys.stderr.write(new_command + '\n')
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print(new_command)
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def is_second_run(command):
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"""Is it the second run of `fuck`?"""
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return command.script.startswith('fuck')
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def main():
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user_dir = setup_user_dir()
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settings = get_settings(user_dir)
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command = get_command(settings, sys.argv)
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if command:
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if is_second_run(command):
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print("echo Can't fuck twice")
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return
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rules = get_rules(user_dir, settings)
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matched_rule = get_matched_rule(command, rules, settings)
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if matched_rule:
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run_rule(matched_rule, command, settings)
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return
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print('echo No fuck given')
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