Add a support for unknown brew commands - #83

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'

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)