Bump to 1.30

Revert "Fixing fish shell example in README.md"

README.md

@@ -71,8 +71,8 @@ REPL-y 0.3.1
 ...
 ```
 
-If you are scary to blindly run changed command, there's `require_confirmation`
+If you are scared to blindly run changed command, there's `require_confirmation`
-[settings](#Settings) option:
+[settings](#settings) option:
 
 ```bash
 ➜ apt-get install vim
@@ -106,11 +106,17 @@ If it fails try to use `easy_install`:
 sudo easy_install thefuck
 ```
 
+Or using an OS package manager (currently supported in OSX via [brew](http://brew.sh)):
+
+```bash
+brew install thefuck
+```
+
 And add to `.bashrc` or `.zshrc` or `.bash_profile`(for OSX):
 
 ```bash
-alias fuck='$(thefuck $(fc -ln -1))'
+alias fuck='eval $(thefuck $(fc -ln -1))'
-# You can use whatever you want as an alias, like for mondays:
+# You can use whatever you want as an alias, like for Mondays:
 alias FUCK='fuck'
 ```
 
@@ -148,19 +154,29 @@ sudo pip install thefuck --upgrade
 The Fuck tries to match rule for the previous command, create new command
 using matched rule and run it. Rules enabled by default:
 
+* `brew_unknown_command` – fixes wrong brew commands, for example `brew docto/brew doctor`;
 * `cd_parent` – changes `cd..` to `cd ..`;
+* `cd_mkdir` – creates directories before cd'ing into them;
 * `cp_omitting_directory` – adds `-a` when you `cp` directory;
+* `fix_alt_space` – replaces Alt+Space with Space character;
 * `git_no_command` – fixes wrong git commands like `git brnch`;
 * `git_push` – adds `--set-upstream origin $branch` to previous failed `git push`;
 * `has_exists_script` – prepends `./` when script/binary exists;
 * `lein_not_task` – fixes wrong `lein` tasks like `lein rpl`;
 * `mkdir_p` – adds `-p` when you trying to create directory without parent;
 * `no_command` – fixes wrong console commands, for example `vom/vim`;
+* `pip_unknown_command` – fixes wrong pip commands, for example `pip instatl/pip install`;
 * `python_command` – prepends `python` when you trying to run not executable/without `./` python script;
+* `sl_ls` – changes `sl` to `ls`;
 * `rm_dir` – adds `-rf` when you trying to remove directory;
+* `ssh_known_hosts` – removes host from `known_hosts` on warning;
 * `sudo` – prepends `sudo` to previous command if it failed because of permissions;
 * `switch_layout` – switches command from your local layout to en.
 
+Bundled, but not enabled by default:
+
+* `rm_root` – adds `--no-preserve-root` to `rm -rf /` command.
+
 ## Creating your own rules
 
 For adding your own rule you should create `your-rule-name.py`
@@ -170,7 +186,7 @@ and `get_new_command(command: Command, settings: Settings) -> str`.
 
 `Command` has three attributes: `script`, `stdout` and `stderr`.
 
-`Settings` is `~/.thefuck/settings.py`.
+`Settings` is a special object filled with `~/.thefuck/settings.py` and values from env, [more](#settings).
 
 Simple example of the rule for running script with `sudo`:
 
@@ -191,9 +207,17 @@ def get_new_command(command, settings):
 
 The Fuck has a few settings parameters, they can be changed in `~/.thefuck/settings.py`:
 
-* `rules` – list of enabled rules, by default all;
+* `rules` – list of enabled rules, by default `thefuck.conf.DEFAULT_RULES`;
 * `require_confirmation` – require confirmation before running new command, by default `False`;
-* `wait_command` – max amount of time in seconds for getting previous command output.
+* `wait_command` – max amount of time in seconds for getting previous command output;
+* `no_colors` – disable colored output.
+
+Or via environment variables:
+
+* `THEFUCK_RULES` – list of enabled rules, like `DEFAULT_RULES:rm_root` or `sudo:no_command`;
+* `THEFUCK_REQUIRE_CONFIRMATION` – require confirmation before running new command, `true/false`;
+* `THEFUCK_WAIT_COMMAND` – max amount of time in seconds for getting previous command output;
+* `THEFUCK_NO_COLORS` – disable colored output, `true/false`.
 
 ## Developing
 

release.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+from subprocess import call
+import re
+
+
+version = None
+
+
+def get_new_setup_py_lines():
+    global version
+    with open('setup.py', 'r') as sf:
+        current_setup = sf.readlines()
+    for line in current_setup:
+        if line.startswith('VERSION = '):
+            major, minor = re.findall(r"VERSION = '(\d+)\.(\d+)'", line)[0]
+            version = "{}.{}".format(major, int(minor) + 1)
+            yield "VERSION = '{}'\n".format(version)
+        else:
+            yield line
+
+
+lines = list(get_new_setup_py_lines())
+with open('setup.py', 'w') as sf:
+    sf.writelines(lines)
+
+call('git pull', shell=True)
+call('git commit -am "Bump to {}"'.format(version), shell=True)
+call('git tag {}'.format(version), shell=True)
+call('git push', shell=True)
+call('git push --tags', shell=True)
+call('python setup.py sdist upload', shell=True)

setup.py

@@ -1,16 +1,20 @@
 from setuptools import setup, find_packages
 
 
+VERSION = '1.30'
+
+
 setup(name='thefuck',
-      version=1.18,
+      version=VERSION,
       description="Magnificent app which corrects your previous console command",
       author='Vladimir Iakovlev',
       author_email='nvbn.rm@gmail.com',
       url='https://github.com/nvbn/thefuck',
       license='MIT',
-      packages=find_packages(exclude=['ez_setup', 'examples', 'tests']),
+      packages=find_packages(exclude=['ez_setup', 'examples',
+                                      'tests', 'release']),
       include_package_data=True,
       zip_safe=False,
-      install_requires=['pathlib', 'psutil'],
+      install_requires=['pathlib', 'psutil', 'colorama', 'six'],
       entry_points={'console_scripts': [
           'thefuck = thefuck.main:main']})

tests/rules/test_brew_install.py

@@ -0,0 +1,49 @@
+import pytest
+from thefuck.types import Command
+from thefuck.rules.brew_install import match, get_new_command
+from thefuck.rules.brew_install import brew_formulas
+
+
+@pytest.fixture
+def brew_no_available_formula():
+    return '''Error: No available formula for elsticsearch '''
+
+
+@pytest.fixture
+def brew_install_no_argument():
+    return '''This command requires a formula argument'''
+
+
+@pytest.fixture
+def brew_already_installed():
+    return '''Warning: git-2.3.5 already installed'''
+
+
+def _is_not_okay_to_test():
+    if 'elasticsearch' not in brew_formulas:
+        return True
+    return False
+
+
+@pytest.mark.skipif(_is_not_okay_to_test(),
+                    reason='No need to run if there\'s no formula')
+def test_match(brew_no_available_formula, brew_already_installed,
+               brew_install_no_argument):
+    assert match(Command('brew install elsticsearch', '',
+                         brew_no_available_formula), None)
+    assert not match(Command('brew install git', '',
+                             brew_already_installed), None)
+    assert not match(Command('brew install', '', brew_install_no_argument),
+                     None)
+
+
+@pytest.mark.skipif(_is_not_okay_to_test(),
+                    reason='No need to run if there\'s no formula')
+def test_get_new_command(brew_no_available_formula):
+    assert get_new_command(Command('brew install elsticsearch', '',
+                                   brew_no_available_formula), None)\
+        == 'brew install elasticsearch'
+
+    assert get_new_command(Command('brew install aa', '',
+                                   brew_no_available_formula),
+                           None) != 'brew install aha'

tests/rules/test_brew_unknown_command.py

@@ -0,0 +1,28 @@
+import pytest
+from thefuck.types import Command
+from thefuck.rules.brew_unknown_command import match, get_new_command
+from thefuck.rules.brew_unknown_command import brew_commands
+
+
+@pytest.fixture
+def brew_unknown_cmd():
+    return '''Error: Unknown command: inst'''
+
+
+@pytest.fixture
+def brew_unknown_cmd_instaa():
+    return '''Error: Unknown command: instaa'''
+
+
+def test_match(brew_unknown_cmd):
+    assert match(Command('brew inst', '', brew_unknown_cmd), None)
+    for command in brew_commands:
+        assert not match(Command('brew ' + command, '', ''), None)
+
+
+def test_get_new_command(brew_unknown_cmd, brew_unknown_cmd_instaa):
+    assert get_new_command(Command('brew inst', '', brew_unknown_cmd), None)\
+        == 'brew list'
+
+    assert get_new_command(Command('brew instaa', '', brew_unknown_cmd_instaa),
+                           None) == 'brew install'

tests/rules/test_cd_mkdir.py

@@ -0,0 +1,19 @@
+from mock import Mock
+from thefuck.rules.cd_mkdir import match, get_new_command
+
+
+def test_match():
+    assert match(Mock(script='cd foo', stderr='cd: foo: No such file or directory'),
+                 None)
+    assert match(Mock(script='cd foo/bar/baz', stderr='cd: foo: No such file or directory'),
+                 None)
+    assert match(Mock(script='cd foo/bar/baz', stderr='cd: can\'t cd to foo/bar/baz'),
+                 None)
+    assert not match(Mock(script='cd foo',
+                          stderr=''), None)
+    assert not match(Mock(script='', stderr=''), None)
+
+
+def test_get_new_command():
+    assert get_new_command(Mock(script='cd foo'), None) == 'mkdir -p foo && cd foo'
+    assert get_new_command(Mock(script='cd foo/bar/baz'), None) == 'mkdir -p foo/bar/baz && cd foo/bar/baz'

tests/rules/test_cd_parent.py

@@ -0,0 +1,12 @@
+from thefuck.types import Command
+from thefuck.rules.cd_parent import match, get_new_command
+
+
+def test_match():
+    assert match(Command('cd..', '', 'cd..: command not found'), None)
+    assert not match(Command('', '', ''), None)
+
+
+def test_get_new_command():
+    assert get_new_command(
+        Command('cd..', '', ''), None) == 'cd ..'

tests/rules/test_composer_not_command.py

@@ -0,0 +1,48 @@
+import pytest
+from thefuck.types import Command
+from thefuck.rules.composer_not_command import match, get_new_command
+
+
+@pytest.fixture
+def composer_not_command():
+    return """
+
+                                    
+  [InvalidArgumentException]        
+  Command "udpate" is not defined.  
+  Did you mean this?                
+      update
+
+
+"""
+
+
+@pytest.fixture
+def composer_not_command_one_of_this():
+    return """
+                            
+
+
+  [InvalidArgumentException]       
+  Command "pdate" is not defined.  
+  Did you mean one of these?       
+      selfupdate                   
+      self-update                  
+      update                       
+
+
+
+"""
+
+
+def test_match(composer_not_command, composer_not_command_one_of_this):
+    assert match(Command('composer udpate', '', composer_not_command), None)
+    assert match(Command('composer pdate', '', composer_not_command_one_of_this), None)
+    assert not match(Command('ls update', '', composer_not_command), None)
+
+
+def test_get_new_command(composer_not_command, composer_not_command_one_of_this):
+    assert get_new_command(Command('composer udpate', '', composer_not_command), None) \
+           == 'composer update'
+    assert get_new_command(
+        Command('composer pdate', '', composer_not_command_one_of_this), None) == 'composer selfupdate'

tests/rules/test_fix_alt_space.py

@@ -0,0 +1,18 @@
+# -*- encoding: utf-8 -*-
+
+
+from thefuck.types import Command
+from thefuck.rules.fix_alt_space import match, get_new_command
+
+
+def test_match():
+    """ The character before 'grep' is Alt+Space, which happens frequently on the Mac when typing
+        the pipe character (Alt+7), and holding the Alt key pressed for longer than necessary. """
+    assert match(Command(u'ps -ef | grep foo', '', u'-bash:  grep: command not found'), None)
+    assert not match(Command('ps -ef | grep foo', '', ''), None)
+    assert not match(Command('', '', ''), None)
+
+
+def test_get_new_command():
+    """ Replace the Alt+Space character by a simple space """
+    assert get_new_command(Command(u'ps -ef | grep foo', '', ''), None) == 'ps -ef | grep foo'

tests/rules/test_git_not_command.py

@@ -1,5 +1,5 @@
 import pytest
-from thefuck.main import Command
+from thefuck.types import Command
 from thefuck.rules.git_not_command import match, get_new_command
 
 

tests/rules/test_git_push.py

@@ -1,5 +1,5 @@
 import pytest
-from thefuck.main import Command
+from thefuck.types import Command
 from thefuck.rules.git_push import match, get_new_command
 
 

tests/rules/test_mkdir_p.py

@@ -1,4 +1,4 @@
-from thefuck.main import Command
+from thefuck.types import Command
 from thefuck.rules.mkdir_p import match, get_new_command
 
 

tests/rules/test_pip_unknown_command.py

@@ -0,0 +1,24 @@
+import pytest
+from thefuck.types import Command
+from thefuck.rules.pip_unknown_command import match, get_new_command
+
+
+@pytest.fixture
+def pip_unknown_cmd():
+    return '''ERROR: unknown command "instatl" - maybe you meant "install"'''
+
+
+@pytest.fixture
+def pip_unknown_cmd_without_recommend():
+    return '''ERROR: unknown command "i"'''
+
+
+def test_match(pip_unknown_cmd, pip_unknown_cmd_without_recommend):
+    assert match(Command('pip instatl', '', pip_unknown_cmd), None)
+    assert not match(Command('pip i', '', pip_unknown_cmd_without_recommend),
+                     None)
+
+
+def test_get_new_command(pip_unknown_cmd):
+    assert get_new_command(Command('pip instatl', '', pip_unknown_cmd), None)\
+        == 'pip install'

tests/rules/test_python_command.py

@@ -1,9 +1,11 @@
-from thefuck.main import Command
+from thefuck.types import Command
 from thefuck.rules.python_command import match, get_new_command
 
+
 def test_match():
     assert match(Command('temp.py', '', 'Permission denied'), None)
     assert not match(Command('', '', ''), None)
 
+
 def test_get_new_command():
     assert get_new_command(Command('./test_sudo.py', '', ''), None) == 'python ./test_sudo.py'

tests/rules/test_rm_dir.py

@@ -1,9 +1,10 @@
-from thefuck.main import Command
+from thefuck.types import Command
 from thefuck.rules.rm_dir import match, get_new_command
 
 
 def test_match():
     assert match(Command('rm foo', '', 'rm: foo: is a directory'), None)
+    assert match(Command('rm foo', '', 'rm: foo: Is a directory'), None)
     assert not match(Command('rm foo', '', ''), None)
     assert not match(Command('rm foo', '', 'foo bar baz'), None)
     assert not match(Command('', '', ''), None)

tests/rules/test_rm_root.py

@@ -0,0 +1,18 @@
+from mock import Mock
+from thefuck.rules.rm_root import match, get_new_command
+
+
+def test_match():
+    assert match(Mock(script='rm -rf /',
+                      stderr='add --no-preserve-root'), None)
+    assert not match(Mock(script='ls',
+                          stderr='add --no-preserve-root'), None)
+    assert not match(Mock(script='rm --no-preserve-root /',
+                          stderr='add --no-preserve-root'), None)
+    assert not match(Mock(script='rm -rf /',
+                          stderr=''), None)
+
+
+def test_get_new_command():
+    assert get_new_command(Mock(script='rm -rf /'), None) \
+        == 'rm -rf / --no-preserve-root'

tests/rules/test_sl_ls.py

@@ -0,0 +1,12 @@
+
+from thefuck.types import Command
+from thefuck.rules.sl_ls import match, get_new_command
+
+
+def test_match():
+    assert match(Command('sl', '', ''), None)
+    assert not match(Command('ls', '', ''), None)
+
+
+def test_get_new_command():
+    assert get_new_command(Command('sl', '', ''), None) == 'ls'

tests/rules/test_ssh_known_host.py

@@ -0,0 +1,69 @@
+import os
+import pytest
+from mock import Mock
+from thefuck.types import Command
+from thefuck.rules.ssh_known_hosts import match, get_new_command, remove_offending_keys
+
+
+@pytest.fixture
+def ssh_error(tmpdir):
+    path = os.path.join(str(tmpdir), 'known_hosts')
+
+    def reset(path):
+        with open(path, 'w') as fh:
+            lines = [
+                '123.234.567.890 asdjkasjdakjsd\n'
+                '98.765.432.321 ejioweojwejrosj\n'
+                '111.222.333.444 qwepoiwqepoiss\n'
+            ]
+            fh.writelines(lines)
+
+    def known_hosts(path):
+        with open(path, 'r') as fh:
+            return fh.readlines()
+
+    reset(path)
+
+    errormsg = u"""@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
+@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
+@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
+IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
+Someone could be eavesdropping on you right now (man-in-the-middle attack)!
+It is also possible that a host key has just been changed.
+The fingerprint for the RSA key sent by the remote host is
+b6:cb:07:34:c0:a0:94:d3:0d:69:83:31:f4:c5:20:9b.
+Please contact your system administrator.
+Add correct host key in {0} to get rid of this message.
+Offending RSA key in {0}:2
+RSA host key for {1} has changed and you have requested strict checking.
+Host key verification failed.""".format(path, '98.765.432.321')
+
+    return errormsg, path, reset, known_hosts
+
+
+def test_match(ssh_error):
+    errormsg, _, _, _ = ssh_error
+    assert match(Command('ssh', '', errormsg), None)
+    assert match(Command('ssh', '', errormsg), None)
+    assert match(Command('scp something something', '', errormsg), None)
+    assert match(Command('scp something something', '', errormsg), None)
+    assert not match(Command('', '', errormsg), None)
+    assert not match(Command('notssh', '', errormsg), None)
+    assert not match(Command('ssh', '', ''), None)
+
+
+def test_remove_offending_keys(ssh_error):
+    errormsg, path, reset, known_hosts = ssh_error
+    command = Command('ssh user@host', '', errormsg)
+    remove_offending_keys(command, None)
+    expected = ['123.234.567.890 asdjkasjdakjsd\n', '111.222.333.444 qwepoiwqepoiss\n']
+    assert known_hosts(path) == expected
+
+
+def test_get_new_command(ssh_error, monkeypatch):
+    errormsg, _, _, _ = ssh_error
+
+    method = Mock()
+    monkeypatch.setattr('thefuck.rules.ssh_known_hosts.remove_offending_keys', method)
+    assert get_new_command(Command('ssh user@host', '', errormsg), None) == 'ssh user@host'
+    assert method.call_count

tests/rules/test_sudo.py

@@ -1,4 +1,4 @@
-from thefuck.main import Command
+from thefuck.types import Command
 from thefuck.rules.sudo import match, get_new_command
 
 

tests/rules/test_switch_lang.py

@@ -7,8 +7,13 @@ from thefuck.rules import switch_lang
 def test_match():
     assert switch_lang.match(Mock(stderr='command not found: фзе-пуе',
                                   script=u'фзе-пуе'), None)
+    assert switch_lang.match(Mock(stderr='command not found: λσ',
+                                  script=u'λσ'), None)
+
     assert not switch_lang.match(Mock(stderr='command not found: pat-get',
                                       script=u'pat-get'), None)
+    assert not switch_lang.match(Mock(stderr='command not found: ls',
+                                      script=u'ls'), None)
     assert not switch_lang.match(Mock(stderr='some info',
                                       script=u'фзе-пуе'), None)
 
@@ -16,3 +21,5 @@ def test_match():
 def test_get_new_command():
     assert switch_lang.get_new_command(
         Mock(script=u'фзе-пуе штыефдд мшь'), None) == 'apt-get install vim'
+    assert switch_lang.get_new_command(
+        Mock(script=u'λσ -λα'), None) == 'ls -la'

tests/test_conf.py

@@ -0,0 +1,89 @@
+import six
+from mock import patch, Mock
+from thefuck.types import Rule
+from thefuck import conf
+
+
+def test_default():
+    assert Rule('test', None, None, True) in conf.DEFAULT_RULES
+    assert Rule('test', None, None, False) not in conf.DEFAULT_RULES
+    assert Rule('test', None, None, False) in (conf.DEFAULT_RULES + ['test'])
+
+
+def test_settings_defaults():
+    with patch('thefuck.conf.load_source', return_value=object()), \
+         patch('thefuck.conf.os.environ', new_callable=lambda: {}):
+        for key, val in conf.DEFAULT_SETTINGS.items():
+            assert getattr(conf.get_settings(Mock()), key) == val
+
+
+def test_settings_from_file():
+    with patch('thefuck.conf.load_source', return_value=Mock(rules=['test'],
+                                                             wait_command=10,
+                                                             require_confirmation=True,
+                                                             no_colors=True)), \
+         patch('thefuck.conf.os.environ', new_callable=lambda: {}):
+        settings = conf.get_settings(Mock())
+        assert settings.rules == ['test']
+        assert settings.wait_command == 10
+        assert settings.require_confirmation is True
+        assert settings.no_colors is True
+
+
+def test_settings_from_file_with_DEFAULT():
+    with patch('thefuck.conf.load_source', return_value=Mock(rules=conf.DEFAULT_RULES + ['test'],
+                                                             wait_command=10,
+                                                             require_confirmation=True,
+                                                             no_colors=True)), \
+         patch('thefuck.conf.os.environ', new_callable=lambda: {}):
+        settings = conf.get_settings(Mock())
+        assert settings.rules == conf.DEFAULT_RULES + ['test']
+
+
+def test_settings_from_env():
+    with patch('thefuck.conf.load_source', return_value=Mock(rules=['test'],
+                                                             wait_command=10)), \
+         patch('thefuck.conf.os.environ',
+               new_callable=lambda: {'THEFUCK_RULES': 'bash:lisp',
+                                     'THEFUCK_WAIT_COMMAND': '55',
+                                     'THEFUCK_REQUIRE_CONFIRMATION': 'true',
+                                     'THEFUCK_NO_COLORS': 'false'}):
+        settings = conf.get_settings(Mock())
+        assert settings.rules == ['bash', 'lisp']
+        assert settings.wait_command == 55
+        assert settings.require_confirmation is True
+        assert settings.no_colors is False
+
+
+def test_settings_from_env_with_DEFAULT():
+    with patch('thefuck.conf.load_source', return_value=Mock()), \
+         patch('thefuck.conf.os.environ', new_callable=lambda: {'THEFUCK_RULES': 'DEFAULT_RULES:bash:lisp'}):
+        settings = conf.get_settings(Mock())
+        assert settings.rules == conf.DEFAULT_RULES + ['bash', 'lisp']
+
+
+def test_initialize_settings_file_ignore_if_exists():
+    settings_path_mock = Mock(is_file=Mock(return_value=True), open=Mock())
+    user_dir_mock = Mock(joinpath=Mock(return_value=settings_path_mock))
+    conf.initialize_settings_file(user_dir_mock)
+    assert settings_path_mock.is_file.call_count == 1
+    assert not settings_path_mock.open.called
+
+
+def test_initialize_settings_file_create_if_exists_not():
+    settings_file = six.StringIO()
+    settings_path_mock = Mock(
+        is_file=Mock(return_value=False),
+        open=Mock(return_value=Mock(
+            __exit__=lambda *args: None, __enter__=lambda *args: settings_file
+        )),
+    )
+    user_dir_mock = Mock(joinpath=Mock(return_value=settings_path_mock))
+    conf.initialize_settings_file(user_dir_mock)
+    settings_file_contents = settings_file.getvalue()
+    assert settings_path_mock.is_file.call_count == 1
+    assert settings_path_mock.open.call_count == 1
+    assert conf.SETTINGS_HEADER in settings_file_contents
+    for setting in conf.DEFAULT_SETTINGS.items():
+        assert '# {} = {}\n'.format(*setting) in settings_file_contents
+    settings_file.close()

tests/test_logs.py

@@ -0,0 +1,7 @@
+from mock import Mock
+from thefuck import logs
+
+
+def test_color():
+    assert logs.color('red', Mock(no_colors=False)) == 'red'
+    assert logs.color('red', Mock(no_colors=True)) == ''

tests/test_main.py

@@ -1,20 +1,7 @@
 from subprocess import PIPE
 from pathlib import PosixPath, Path
 from mock import patch, Mock
-from thefuck import main
+from thefuck import main, conf, types
-
-
-def test_get_settings():
-    with patch('thefuck.main.load_source', return_value=Mock(rules=['bash'])):
-        assert main.get_settings(Path('/')).rules == ['bash']
-    with patch('thefuck.main.load_source', return_value=Mock(spec=[])):
-        assert main.get_settings(Path('/')).rules is None
-
-
-def test_is_rule_enabled():
-    assert main.is_rule_enabled(Mock(rules=None), Path('bash.py'))
-    assert main.is_rule_enabled(Mock(rules=['bash']), Path('bash.py'))
-    assert not main.is_rule_enabled(Mock(rules=['bash']), Path('lisp.py'))
 
 
 def test_load_rule():
@@ -23,26 +10,31 @@ def test_load_rule():
     with patch('thefuck.main.load_source',
                return_value=Mock(
                    match=match,
-                   get_new_command=get_new_command)) as load_source:
+                   get_new_command=get_new_command,
-        assert main.load_rule(Path('/rules/bash.py')) == main.Rule(match, get_new_command)
+                   enabled_by_default=True)) as load_source:
+        assert main.load_rule(Path('/rules/bash.py')) \
+               == types.Rule('bash', match, get_new_command, True)
         load_source.assert_called_once_with('bash', '/rules/bash.py')
 
 
 def test_get_rules():
     with patch('thefuck.main.Path.glob') as glob, \
             patch('thefuck.main.load_source',
-                  lambda x, _: Mock(match=x, get_new_command=x)):
+                  lambda x, _: Mock(match=x, get_new_command=x,
+                                    enabled_by_default=True)):
         glob.return_value = [PosixPath('bash.py'), PosixPath('lisp.py')]
-        assert main.get_rules(
+        assert list(main.get_rules(
             Path('~'),
-            Mock(rules=None)) == [main.Rule('bash', 'bash'),
+            Mock(rules=conf.DEFAULT_RULES))) \
-                                  main.Rule('lisp', 'lisp'),
+               == [types.Rule('bash', 'bash', 'bash', True),
-                                  main.Rule('bash', 'bash'),
+                   types.Rule('lisp', 'lisp', 'lisp', True),
-                                  main.Rule('lisp', 'lisp')]
+                   types.Rule('bash', 'bash', 'bash', True),
-        assert main.get_rules(
+                   types.Rule('lisp', 'lisp', 'lisp', True)]
+        assert list(main.get_rules(
             Path('~'),
-            Mock(rules=['bash'])) == [main.Rule('bash', 'bash'),
+            Mock(rules=types.RulesNamesList(['bash'])))) \
-                                      main.Rule('bash', 'bash')]
+               == [types.Rule('bash', 'bash', 'bash', True),
+                   types.Rule('bash', 'bash', 'bash', True)]
 
 
 def test_get_command():
@@ -55,30 +47,34 @@ def test_get_command():
         Popen.return_value.stderr.read.return_value = b'stderr'
         assert main.get_command(Mock(), ['thefuck', 'apt-get',
                                          'search', 'vim']) \
-               == main.Command('apt-get search vim', 'stdout', 'stderr')
+               == types.Command('apt-get search vim', 'stdout', 'stderr')
         Popen.assert_called_once_with('apt-get search vim',
                                       shell=True,
                                       stdout=PIPE,
                                       stderr=PIPE,
                                       env={'LANG': 'C'})
+        assert main.get_command(Mock(), ['']) is None
 
 
-def test_get_matched_rule():
+def test_get_matched_rule(capsys):
-    rules = [main.Rule(lambda x, _: x.script == 'cd ..', None),
+    rules = [types.Rule('', lambda x, _: x.script == 'cd ..', None, True),
-             main.Rule(lambda *_: False, None)]
+             types.Rule('', lambda *_: False, None, True),
-    assert main.get_matched_rule(main.Command('ls', '', ''),
+             types.Rule('rule', Mock(side_effect=OSError('Denied')), None, True)]
-                                 rules, None) is None
+    assert main.get_matched_rule(types.Command('ls', '', ''),
-    assert main.get_matched_rule(main.Command('cd ..', '', ''),
+                                 rules, Mock(no_colors=True)) is None
-                                 rules, None) == rules[0]
+    assert main.get_matched_rule(types.Command('cd ..', '', ''),
+                                 rules, Mock(no_colors=True)) == rules[0]
+    assert capsys.readouterr()[1].split('\n')[0] \
+           == '[WARN] Rule rule:'
 
 
 def test_run_rule(capsys):
     with patch('thefuck.main.confirm', return_value=True):
-        main.run_rule(main.Rule(None, lambda *_: 'new-command'),
+        main.run_rule(types.Rule('', None, lambda *_: 'new-command', True),
                       None, None)
         assert capsys.readouterr() == ('new-command\n', '')
     with patch('thefuck.main.confirm', return_value=False):
-        main.run_rule(main.Rule(None, lambda *_: 'new-command'),
+        main.run_rule(types.Rule('', None, lambda *_: 'new-command', True),
                       None, None)
         assert capsys.readouterr() == ('', '')
 
@@ -89,9 +85,11 @@ def test_confirm(capsys):
     assert capsys.readouterr() == ('', 'command\n')
     # When confirmation required and confirmed:
     with patch('thefuck.main.sys.stdin.read', return_value='\n'):
-        assert main.confirm('command', Mock(require_confirmation=True))
+        assert main.confirm('command', Mock(require_confirmation=True,
-        assert capsys.readouterr() == ('', 'command [Enter/Ctrl+C]')
+                                            no_colors=True))
+        assert capsys.readouterr() == ('', 'command [enter/ctrl+c]')
     # When confirmation required and ctrl+c:
     with patch('thefuck.main.sys.stdin.read', side_effect=KeyboardInterrupt):
-        assert not main.confirm('command', Mock(require_confirmation=True))
+        assert not main.confirm('command', Mock(require_confirmation=True,
-        assert capsys.readouterr() == ('', 'command [Enter/Ctrl+C]Aborted\n')
+                                                no_colors=True))
+        assert capsys.readouterr() == ('', 'command [enter/ctrl+c]Aborted\n')

tests/test_types.py

@@ -0,0 +1,15 @@
+from thefuck.types import Rule, RulesNamesList, Settings
+
+
+def test_rules_names_list():
+    assert RulesNamesList(['bash', 'lisp']) == ['bash', 'lisp']
+    assert RulesNamesList(['bash', 'lisp']) == RulesNamesList(['bash', 'lisp'])
+    assert Rule('lisp', None, None, False) in RulesNamesList(['lisp'])
+    assert Rule('bash', None, None, False) not in RulesNamesList(['lisp'])
+
+
+def test_update_settings():
+    settings = Settings({'key': 'val'})
+    new_settings = settings.update(key='new-val')
+    assert new_settings.key == 'new-val'
+    assert settings.key == 'val'

tests/test_utils.py

@@ -0,0 +1,25 @@
+from mock import Mock
+from thefuck.utils import sudo_support, wrap_settings
+from thefuck.types import Command, Settings
+
+
+def test_wrap_settings():
+    fn = lambda _, settings: settings
+    assert wrap_settings({'key': 'val'})(fn)(None, Settings({})) \
+           == {'key': 'val'}
+    assert wrap_settings({'key': 'new-val'})(fn)(
+        None, Settings({'key': 'val'})) == {'key': 'new-val'}
+
+
+def test_sudo_support():
+    fn = Mock(return_value=True, __name__='')
+    assert sudo_support(fn)(Command('sudo ls', 'out', 'err'), None)
+    fn.assert_called_once_with(Command('ls', 'out', 'err'), None)
+
+    fn.return_value = False
+    assert not sudo_support(fn)(Command('sudo ls', 'out', 'err'), None)
+
+    fn.return_value = 'pwd'
+    assert sudo_support(fn)(Command('sudo ls', 'out', 'err'), None) == 'sudo pwd'
+
+    assert sudo_support(fn)(Command('ls', 'out', 'err'), None) == 'pwd'

thefuck/conf.py

@@ -0,0 +1,116 @@
+from copy import copy
+from imp import load_source
+import os
+import sys
+from six import text_type
+from . import logs, types
+
+
+class _DefaultRulesNames(types.RulesNamesList):
+    def __add__(self, items):
+        return _DefaultRulesNames(list(self) + items)
+
+    def __contains__(self, item):
+        return item.enabled_by_default or \
+               super(_DefaultRulesNames, self).__contains__(item)
+
+    def __eq__(self, other):
+        if isinstance(other, _DefaultRulesNames):
+            return super(_DefaultRulesNames, self).__eq__(other)
+        else:
+            return False
+
+
+DEFAULT_RULES = _DefaultRulesNames([])
+
+
+DEFAULT_SETTINGS = {'rules': DEFAULT_RULES,
+                    'wait_command': 3,
+                    'require_confirmation': False,
+                    'no_colors': False}
+
+ENV_TO_ATTR = {'THEFUCK_RULES': 'rules',
+               'THEFUCK_WAIT_COMMAND': 'wait_command',
+               'THEFUCK_REQUIRE_CONFIRMATION': 'require_confirmation',
+               'THEFUCK_NO_COLORS': 'no_colors'}
+
+
+SETTINGS_HEADER = u"""# ~/.thefuck/settings.py: The Fuck settings file
+#
+# The rules are defined as in the example bellow:
+#
+# rules = ['cd_parent', 'git_push', 'python_command', 'sudo']
+#
+# The default values are as follows. Uncomment and change to fit your needs.
+# See https://github.com/nvbn/thefuck#settings for more information.
+#
+
+"""
+
+
+def _settings_from_file(user_dir):
+    """Loads settings from file."""
+    settings = load_source('settings',
+                           text_type(user_dir.joinpath('settings.py')))
+    return {key: getattr(settings, key)
+            for key in DEFAULT_SETTINGS.keys()
+            if hasattr(settings, key)}
+
+
+def _rules_from_env(val):
+    """Transforms rules list from env-string to python."""
+    val = val.split(':')
+    if 'DEFAULT_RULES' in val:
+        val = DEFAULT_RULES + [rule for rule in val if rule != 'DEFAULT_RULES']
+    return val
+
+
+def _val_from_env(env, attr):
+    """Transforms env-strings to python."""
+    val = os.environ[env]
+    if attr == 'rules':
+        val = _rules_from_env(val)
+    elif attr == 'wait_command':
+        val = int(val)
+    elif attr in ('require_confirmation', 'no_colors'):
+        val = val.lower() == 'true'
+    return val
+
+
+def _settings_from_env():
+    """Loads settings from env."""
+    return {attr: _val_from_env(env, attr)
+            for env, attr in ENV_TO_ATTR.items()
+            if env in os.environ}
+
+
+def get_settings(user_dir):
+    """Returns settings filled with values from `settings.py` and env."""
+    conf = copy(DEFAULT_SETTINGS)
+    try:
+        conf.update(_settings_from_file(user_dir))
+    except Exception:
+        logs.exception("Can't load settings from file",
+                       sys.exc_info(),
+                       types.Settings(conf))
+
+    try:
+        conf.update(_settings_from_env())
+    except Exception:
+        logs.exception("Can't load settings from env",
+                       sys.exc_info(),
+                       types.Settings(conf))
+
+    if not isinstance(conf['rules'], types.RulesNamesList):
+        conf['rules'] = types.RulesNamesList(conf['rules'])
+
+    return types.Settings(conf)
+
+
+def initialize_settings_file(user_dir):
+    settings_path = user_dir.joinpath('settings.py')
+    if not settings_path.is_file():
+        with settings_path.open(mode='w') as settings_file:
+            settings_file.write(SETTINGS_HEADER)
+            for setting in DEFAULT_SETTINGS.items():
+                settings_file.write(u'# {} = {}\n'.format(*setting))

thefuck/logs.py

@@ -0,0 +1,51 @@
+import sys
+from traceback import format_exception
+import colorama
+
+
+def color(color_, settings):
+    """Utility for ability to disabling colored output."""
+    if settings.no_colors:
+        return ''
+    else:
+        return color_
+
+
+def exception(title, exc_info, settings):
+    sys.stderr.write(
+        u'{warn}[WARN] {title}:{reset}\n{trace}'
+        u'{warn}----------------------------{reset}\n\n'.format(
+            warn=color(colorama.Back.RED + colorama.Fore.WHITE
+                       + colorama.Style.BRIGHT, settings),
+            reset=color(colorama.Style.RESET_ALL, settings),
+            title=title,
+            trace=''.join(format_exception(*exc_info))))
+
+
+def rule_failed(rule, exc_info, settings):
+    exception('Rule {}'.format(rule.name), exc_info, settings)
+
+
+def show_command(new_command, settings):
+    sys.stderr.write('{bold}{command}{reset}\n'.format(
+        command=new_command,
+        bold=color(colorama.Style.BRIGHT, settings),
+        reset=color(colorama.Style.RESET_ALL, settings)))
+
+
+def confirm_command(new_command, settings):
+    sys.stderr.write(
+        '{bold}{command}{reset} [{green}enter{reset}/{red}ctrl+c{reset}]'.format(
+            command=new_command,
+            bold=color(colorama.Style.BRIGHT, settings),
+            green=color(colorama.Fore.GREEN, settings),
+            red=color(colorama.Fore.RED, settings),
+            reset=color(colorama.Style.RESET_ALL, settings)))
+    sys.stderr.flush()
+
+
+def failed(msg, settings):
+    sys.stderr.write('{red}{msg}{reset}\n'.format(
+        msg=msg,
+        red=color(colorama.Fore.RED, settings),
+        reset=color(colorama.Style.RESET_ALL, settings)))

thefuck/main.py

@@ -1,4 +1,3 @@
-from collections import namedtuple
 from imp import load_source
 from pathlib import Path
 from os.path import expanduser
@@ -6,10 +5,8 @@ from subprocess import Popen, PIPE
 import os
 import sys
 from psutil import Process, TimeoutExpired
-
+import colorama
-
+from . import logs, conf, types
-Command = namedtuple('Command', ('script', 'stdout', 'stderr'))
-Rule = namedtuple('Rule', ('match', 'get_new_command'))
 
 
 def setup_user_dir():
@@ -18,32 +15,16 @@ def setup_user_dir():
     rules_dir = user_dir.joinpath('rules')
     if not rules_dir.is_dir():
         rules_dir.mkdir(parents=True)
-    user_dir.joinpath('settings.py').touch()
+    conf.initialize_settings_file(user_dir)
     return user_dir
 
 
-def get_settings(user_dir):
-    """Returns prepared settings module."""
-    settings = load_source('settings',
-                           str(user_dir.joinpath('settings.py')))
-    settings.__dict__.setdefault('rules', None)
-    settings.__dict__.setdefault('wait_command', 3)
-    settings.__dict__.setdefault('require_confirmation', False)
-    return settings
-
-
-def is_rule_enabled(settings, rule):
-    """Returns `True` when rule mentioned in `rules` or `rules`
-    isn't defined.
-
-    """
-    return settings.rules is None or rule.name[:-3] in settings.rules
-
-
 def load_rule(rule):
     """Imports rule module and returns it."""
     rule_module = load_source(rule.name[:-3], str(rule))
-    return Rule(rule_module.match, rule_module.get_new_command)
+    return types.Rule(rule.name[:-3], rule_module.match,
+                      rule_module.get_new_command,
+                      getattr(rule_module, 'enabled_by_default', True))
 
 
 def get_rules(user_dir, settings):
@@ -52,8 +33,11 @@ def get_rules(user_dir, settings):
         .joinpath('rules') \
         .glob('*.py')
     user = user_dir.joinpath('rules').glob('*.py')
-    return [load_rule(rule) for rule in sorted(list(bundled)) + list(user)
+    for rule in sorted(list(bundled)) + list(user):
-            if rule.name != '__init__.py' and is_rule_enabled(settings, rule)]
+        if rule.name != '__init__.py':
+            loaded_rule = load_rule(rule)
+            if loaded_rule in settings.rules:
+                yield loaded_rule
 
 
 def wait_output(settings, popen):
@@ -80,33 +64,39 @@ def get_command(settings, args):
         script = ' '.join(arg.decode('utf-8') for arg in args[1:])
     else:
         script = ' '.join(args[1:])
+
+    if not script:
+        return
+
     result = Popen(script, shell=True, stdout=PIPE, stderr=PIPE,
                    env=dict(os.environ, LANG='C'))
     if wait_output(settings, result):
-        return Command(script, result.stdout.read().decode('utf-8'),
+        return types.Command(script, result.stdout.read().decode('utf-8'),
                              result.stderr.read().decode('utf-8'))
 
 
 def get_matched_rule(command, rules, settings):
     """Returns first matched rule for command."""
     for rule in rules:
+        try:
             if rule.match(command, settings):
                 return rule
+        except Exception:
+            logs.rule_failed(rule, sys.exc_info(), settings)
 
 
 def confirm(new_command, settings):
     """Returns `True` when running of new command confirmed."""
     if not settings.require_confirmation:
-        sys.stderr.write(new_command + '\n')
+        logs.show_command(new_command, settings)
         return True
 
-    sys.stderr.write(new_command + ' [Enter/Ctrl+C]')
+    logs.confirm_command(new_command, settings)
-    sys.stderr.flush()
     try:
         sys.stdin.read(1)
         return True
     except KeyboardInterrupt:
-        sys.stderr.write('Aborted\n')
+        logs.failed('Aborted', settings)
         return False
 
 
@@ -123,13 +113,14 @@ def is_second_run(command):
 
 
 def main():
+    colorama.init()
     user_dir = setup_user_dir()
-    settings = get_settings(user_dir)
+    settings = conf.get_settings(user_dir)
 
     command = get_command(settings, sys.argv)
     if command:
         if is_second_run(command):
-            print("echo Can't fuck twice")
+            logs.failed("Can't fuck twice", settings)
             return
 
         rules = get_rules(user_dir, settings)
@@ -138,4 +129,4 @@ def main():
             run_rule(matched_rule, command, settings)
             return
 
-    print('echo No fuck given')
+    logs.failed('No fuck given', settings)

thefuck/rules/apt_get.py

@@ -0,0 +1,23 @@
+try:
+    import CommandNotFound
+except ImportError:
+    enabled_by_default = False
+
+
+def match(command, settings):
+    if 'not found' in command.stderr:
+        try:
+            c = CommandNotFound.CommandNotFound()
+            pkgs = c.getPackages(command.script.split(" ")[0])
+            name, _ = pkgs[0]
+            return True
+        except IndexError:
+            # IndexError is thrown when no matching package is found
+            return False
+
+
+def get_new_command(command, settings):
+    c = CommandNotFound.CommandNotFound()
+    pkgs = c.getPackages(command.script.split(" ")[0])
+    name, _ = pkgs[0]
+    return "sudo apt-get install {} && {}".format(name, command.script)

thefuck/rules/brew_install.py

@@ -0,0 +1,43 @@
+import difflib
+import os
+import re
+from subprocess import check_output
+
+import thefuck.logs
+
+# Formulars are base on each local system's status
+brew_formulas = []
+try:
+    brew_path_prefix = check_output(['brew', '--prefix']).strip()
+    brew_formula_path = brew_path_prefix + '/Library/Formula'
+
+    for file_name in os.listdir(brew_formula_path):
+        if file_name.endswith('.rb'):
+            brew_formulas.append(file_name.replace('.rb', ''))
+except:
+    pass
+
+
+def _get_similar_formulars(formula_name):
+    return difflib.get_close_matches(formula_name, brew_formulas, 1, 0.85)
+
+
+def match(command, settings):
+    is_proper_command = ('brew install' in command.script and
+                         'No available formula' in command.stderr)
+
+    has_possible_formulas = False
+    if is_proper_command:
+        formula = re.findall(r'Error: No available formula for ([a-z]+)',
+                             command.stderr)[0]
+        has_possible_formulas = len(_get_similar_formulars(formula)) > 0
+
+    return has_possible_formulas
+
+
+def get_new_command(command, settings):
+    not_exist_formula = re.findall(r'Error: No available formula for ([a-z]+)',
+                                   command.stderr)[0]
+    exist_formula = _get_similar_formulars(not_exist_formula)[0]
+
+    return command.script.replace(not_exist_formula, exist_formula, 1)

thefuck/rules/brew_unknown_command.py

@@ -0,0 +1,33 @@
+import difflib
+import re
+import thefuck.logs
+
+# This commands are based on Homebrew 0.9.5
+brew_commands = ['info', 'home', 'options', 'install', 'uninstall', 'search',
+                 'list', 'update', 'upgrade', 'pin', 'unpin', 'doctor',
+                 'create', 'edit']
+
+
+def _get_similar_commands(command):
+    return difflib.get_close_matches(command, brew_commands)
+
+
+def match(command, settings):
+    is_proper_command = ('brew' in command.script and
+                         'Unknown command' in command.stderr)
+
+    has_possible_commands = False
+    if is_proper_command:
+        broken_cmd = re.findall(r'Error: Unknown command: ([a-z]+)',
+                                command.stderr)[0]
+        has_possible_commands = len(_get_similar_commands(broken_cmd)) > 0
+
+    return has_possible_commands
+
+
+def get_new_command(command, settings):
+    broken_cmd = re.findall(r'Error: Unknown command: ([a-z]+)',
+                            command.stderr)[0]
+    new_cmd = _get_similar_commands(broken_cmd)[0]
+
+    return command.script.replace(broken_cmd, new_cmd, 1)

thefuck/rules/cd_mkdir.py

@@ -0,0 +1,14 @@
+import re
+from thefuck.utils import sudo_support
+
+
+@sudo_support
+def match(command, settings):
+    return (command.script.startswith('cd ')
+        and ('no such file or directory' in command.stderr.lower()
+            or 'cd: can\'t cd to' in command.stderr.lower()))
+
+
+@sudo_support
+def get_new_command(command, settings):
+    return re.sub(r'^cd (.*)', 'mkdir -p \\1 && cd \\1', command.script)

thefuck/rules/composer_not_command.py

@@ -0,0 +1,15 @@
+import re
+
+
+def match(command, settings):
+    return ('composer' in command.script
+            and ('did you mean this?' in command.stderr.lower()
+                 or 'did you mean one of these?' in command.stderr.lower()))
+
+
+def get_new_command(command, settings):
+    broken_cmd = re.findall(r"Command \"([^']*)\" is not defined", command.stderr)[0]
+    new_cmd = re.findall(r'Did you mean this\?[^\n]*\n\s*([^\n]*)', command.stderr)
+    if not new_cmd:
+        new_cmd = re.findall(r'Did you mean one of these\?[^\n]*\n\s*([^\n]*)', command.stderr)
+    return command.script.replace(broken_cmd, new_cmd[0].strip(), 1)

thefuck/rules/cp_omitting_directory.py

@@ -1,10 +1,13 @@
 import re
+from thefuck.utils import sudo_support
 
 
+@sudo_support
 def match(command, settings):
     return command.script.startswith('cp ') \
         and 'cp: omitting directory' in command.stderr.lower()
 
 
+@sudo_support
 def get_new_command(command, settings):
     return re.sub(r'^cp', 'cp -a', command.script)

thefuck/rules/fix_alt_space.py

@@ -0,0 +1,15 @@
+# -*- encoding: utf-8 -*-
+
+import re
+from thefuck.utils import sudo_support
+
+
+@sudo_support
+def match(command, settings):
+    return ('command not found' in command.stderr.lower()
+            and u' ' in command.script)
+
+
+@sudo_support
+def get_new_command(command, settings):
+    return re.sub(u' ', ' ', command.script)

thefuck/rules/has_exists_script.py

@@ -1,11 +1,14 @@
 import os
+from thefuck.utils import sudo_support
 
 
+@sudo_support
 def match(command, settings):
     return os.path.exists(command.script.split()[0]) \
         and 'command not found' in command.stderr
 
 
+@sudo_support
 def get_new_command(command, settings):
     return u'./{}'.format(command.script)
 

thefuck/rules/lein_not_task.py

@@ -1,12 +1,15 @@
 import re
+from thefuck.utils import sudo_support
 
 
+@sudo_support
 def match(command, settings):
     return (command.script.startswith('lein')
             and "is not a task. See 'lein help'" in command.stderr
             and 'Did you mean this?' in command.stderr)
 
 
+@sudo_support
 def get_new_command(command, settings):
     broken_cmd = re.findall(r"'([^']*)' is not a task",
                             command.stderr)[0]

thefuck/rules/mkdir_p.py

@@ -1,9 +1,13 @@
 import re
+from thefuck.utils import sudo_support
 
+
+@sudo_support
 def match(command, settings):
     return ('mkdir' in command.script
             and 'No such file or directory' in command.stderr)
 
 
+@sudo_support
 def get_new_command(command, settings):
     return re.sub('^mkdir (.*)', 'mkdir -p \\1', command.script)

thefuck/rules/no_command.py

@@ -1,21 +1,31 @@
 from difflib import get_close_matches
 import os
 from pathlib import Path
+from thefuck.utils import sudo_support
+
+
+def _safe(fn, fallback):
+    try:
+        return fn()
+    except OSError:
+        return fallback
 
 
 def _get_all_bins():
     return [exe.name
-            for path in os.environ['PATH'].split(':')
+            for path in os.environ.get('PATH', '').split(':')
-            for exe in Path(path).iterdir()
+            for exe in _safe(lambda: list(Path(path).iterdir()), [])
-            if exe.is_file()]
+            if not _safe(exe.is_dir, True)]
 
 
+@sudo_support
 def match(command, settings):
     return 'not found' in command.stderr and \
            bool(get_close_matches(command.script.split(' ')[0],
                                   _get_all_bins()))
 
 
+@sudo_support
 def get_new_command(command, settings):
     old_command = command.script.split(' ')[0]
     new_command = get_close_matches(old_command,

thefuck/rules/pip_unknown_command.py

@@ -0,0 +1,15 @@
+import re
+
+
+def match(command, settings):
+    return ('pip' in command.script and
+            'unknown command' in command.stderr and
+            'maybe you meant' in command.stderr)
+
+
+def get_new_command(command, settings):
+    broken_cmd = re.findall(r'ERROR: unknown command \"([a-z]+)\"',
+                            command.stderr)[0]
+    new_cmd = re.findall(r'maybe you meant \"([a-z]+)\"', command.stderr)[0]
+
+    return command.script.replace(broken_cmd, new_cmd, 1)

thefuck/rules/python_command.py

@@ -1,7 +1,10 @@
+from thefuck.utils import sudo_support
 # add 'python' suffix to the command if
 #  1) The script does not have execute permission or
 #  2) is interpreted as shell script
 
+
+@sudo_support
 def match(command, settings):
     toks = command.script.split()
     return (len(toks) > 0
@@ -10,5 +13,6 @@ def match(command, settings):
                  'command not found' in command.stderr))
 
 
+@sudo_support
 def get_new_command(command, settings):
     return 'python ' + command.script

thefuck/rules/rm_dir.py

@@ -1,9 +1,13 @@
 import re
+from thefuck.utils import sudo_support
 
+
+@sudo_support
 def match(command, settings):
     return ('rm' in command.script
-            and 'is a directory' in command.stderr)
+            and 'is a directory' in command.stderr.lower())
 
 
+@sudo_support
 def get_new_command(command, settings):
     return re.sub('^rm (.*)', 'rm -rf \\1', command.script)

thefuck/rules/rm_root.py

@@ -0,0 +1,16 @@
+from thefuck.utils import sudo_support
+
+
+enabled_by_default = False
+
+
+@sudo_support
+def match(command, settings):
+    return ({'rm', '/'}.issubset(command.script.split())
+            and '--no-preserve-root' not in command.script
+            and '--no-preserve-root' in command.stderr)
+
+
+@sudo_support
+def get_new_command(command, settings):
+    return u'{} --no-preserve-root'.format(command.script)

thefuck/rules/sl_ls.py

@@ -0,0 +1,14 @@
+"""
+This happens way too often
+
+When typing really fast cause I'm a 1337 H4X0R,
+I often fuck up 'ls' and type 'sl'. No more!
+"""
+
+
+def match(command, settings):
+    return command.script == 'sl'
+
+
+def get_new_command(command, settings):
+    return 'ls'

thefuck/rules/ssh_known_hosts.py

@@ -0,0 +1,37 @@
+import re
+
+patterns = [
+    r'WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!',
+    r'WARNING: POSSIBLE DNS SPOOFING DETECTED!',
+    r"Warning: the \S+ host key for '([^']+)' differs from the key for the IP address '([^']+)'",
+]
+offending_pattern = re.compile(
+    r'(?:Offending (?:key for IP|\S+ key)|Matching host key) in ([^:]+):(\d+)',
+    re.MULTILINE)
+
+commands = ['ssh', 'scp']
+
+
+def match(command, settings):
+    if not command.script:
+        return False
+    if not command.script.split()[0] in commands:
+        return False
+    if not any([re.findall(pattern, command.stderr) for pattern in patterns]):
+        return False
+    return True
+
+
+def remove_offending_keys(command, settings):
+    offending = offending_pattern.findall(command.stderr)
+    for filepath, lineno in offending:
+        with open(filepath, 'r') as fh:
+            lines = fh.readlines()
+            del lines[int(lineno) - 1]
+        with open(filepath, 'w') as fh:
+            fh.writelines(lines)
+
+
+def get_new_command(command, settings):
+    remove_offending_keys(command, settings)
+    return command.script

thefuck/rules/sudo.py

@@ -3,7 +3,11 @@ patterns = ['permission denied',
             'pkg: Insufficient privileges',
             'you cannot perform this operation unless you are root',
             'non-root users cannot',
-            'Operation not permitted']
+            'Operation not permitted',
+            'root privilege',
+            'This command has to be run under the root user.',
+            'This operation requires root.',
+            'You need to be root to perform this command.']
 
 
 def match(command, settings):

thefuck/rules/switch_lang.py

@@ -2,7 +2,9 @@
 
 target_layout = '''qwertyuiop[]asdfghjkl;'zxcvbnm,./QWERTYUIOP{}ASDFGHJKL:"ZXCVBNM<>?'''
 
-source_layouts = [u'''йцукенгшщзхъфывапролджэячсмитьбю.ЙЦУКЕНГШЩЗХЪФЫВАПРОЛДЖЭЯЧСМИТЬБЮ,''']
+source_layouts = [u'''йцукенгшщзхъфывапролджэячсмитьбю.ЙЦУКЕНГШЩЗХЪФЫВАПРОЛДЖЭЯЧСМИТЬБЮ,''',
+                  u'''ضصثقفغعهخحجچشسیبلاتنمکگظطزرذدپو./ًٌٍَُِّْ][}{ؤئيإأآة»«:؛كٓژٰ‌ٔء><؟''',
+                  u''';ςερτυθιοπ[]ασδφγηξκλ΄ζχψωβνμ,./:΅ΕΡΤΥΘΙΟΠ{}ΑΣΔΦΓΗΞΚΛ¨"ΖΧΨΩΒΝΜ<>?''']
 
 
 def _get_matched_layout(command):

thefuck/types.py

@@ -0,0 +1,26 @@
+from collections import namedtuple
+
+
+Command = namedtuple('Command', ('script', 'stdout', 'stderr'))
+
+Rule = namedtuple('Rule', ('name', 'match', 'get_new_command',
+                           'enabled_by_default'))
+
+
+class RulesNamesList(list):
+    """Wrapper a top of list for string rules names."""
+
+    def __contains__(self, item):
+        return super(RulesNamesList, self).__contains__(item.name)
+
+
+class Settings(dict):
+
+    def __getattr__(self, item):
+        return self.get(item)
+
+    def update(self, **kwargs):
+        """Returns new settings with new values from `kwargs`."""
+        conf = dict(self)
+        conf.update(kwargs)
+        return Settings(conf)

thefuck/utils.py

@@ -1,5 +1,7 @@
 from functools import wraps
 import os
+import six
+from .types import Command
 
 
 def which(program):
@@ -35,9 +37,25 @@ def wrap_settings(params):
     def decorator(fn):
         @wraps(fn)
         def wrapper(command, settings):
-            for key, val in params.items():
+            return fn(command, settings.update(**params))
-                if not hasattr(settings, key):
-                    setattr(settings, key, val)
-            return fn(command, settings)
         return wrapper
     return decorator
+
+
+def sudo_support(fn):
+    """Removes sudo before calling fn and adds it after."""
+    @wraps(fn)
+    def wrapper(command, settings):
+        if not command.script.startswith('sudo '):
+            return fn(command, settings)
+
+        result = fn(Command(command.script[5:],
+                            command.stdout,
+                            command.stderr),
+                    settings)
+
+        if result and isinstance(result, six.string_types):
+            return u'sudo {}'.format(result)
+        else:
+            return result
+    return wrapper