Add excluded_search_path_prefixes setting

Allows filtering the paths used to search for commands
Can be useful to filter out /mnt/ in WSL for performance

README.md

@@ -434,6 +434,7 @@ Several *The Fuck* parameters can be changed in the file `$XDG_CONFIG_HOME/thefu
 * `wait_slow_command` – max amount of time in seconds for getting previous command output if it in `slow_commands` list;
 * `slow_commands` – list of slow commands;
 * `num_close_matches` – maximum number of close matches to suggest, by default `3`.
+* `excluded_search_path_prefixes` – path prefixes to ignore when searching for commands, by default `[]`.
 
 An example of `settings.py`:
 
@@ -466,6 +467,7 @@ rule with lower `priority` will be matched first;
 * `THEFUCK_WAIT_SLOW_COMMAND` – max amount of time in seconds for getting previous command output if it in `slow_commands` list;
 * `THEFUCK_SLOW_COMMANDS` – list of slow commands, like `lein:gradle`;
 * `THEFUCK_NUM_CLOSE_MATCHES` – maximum number of close matches to suggest, like `5`.
+* `THEFUCK_EXCLUDED_SEARCH_PATH_PREFIXES` – path prefixes to ignore when searching for commands, by default `[]`.
 
 For example:
 

tests/test_conf.py

@@ -54,7 +54,8 @@ class TestSettingsFromEnv(object):
                            'THEFUCK_PRIORITY': 'bash=10:lisp=wrong:vim=15',
                            'THEFUCK_WAIT_SLOW_COMMAND': '999',
                            'THEFUCK_SLOW_COMMANDS': 'lein:react-native:./gradlew',
-                           'THEFUCK_NUM_CLOSE_MATCHES': '359'})
+                           'THEFUCK_NUM_CLOSE_MATCHES': '359',
+                           'THEFUCK_EXCLUDED_SEARCH_PATH_PREFIXES': '/mnt/'})
         settings.init()
         assert settings.rules == ['bash', 'lisp']
         assert settings.exclude_rules == ['git', 'vim']
@@ -65,6 +66,7 @@ class TestSettingsFromEnv(object):
         assert settings.wait_slow_command == 999
         assert settings.slow_commands == ['lein', 'react-native', './gradlew']
         assert settings.num_close_matches == 359
+        assert settings.excluded_search_path_prefixes == ['/mnt/']
 
     def test_from_env_with_DEFAULT(self, os_environ, settings):
         os_environ.update({'THEFUCK_RULES': 'DEFAULT_RULES:bash:lisp'})

thefuck/conf.py

@@ -101,7 +101,7 @@ class Settings(dict):
         elif attr in ('require_confirmation', 'no_colors', 'debug',
                       'alter_history', 'instant_mode'):
             return val.lower() == 'true'
-        elif attr == 'slow_commands':
+        elif attr in ('slow_commands', 'excluded_search_path_prefixes'):
             return val.split(':')
         else:
             return val

thefuck/const.py

@@ -43,7 +43,8 @@ DEFAULT_SETTINGS = {'rules': DEFAULT_RULES,
                     'repeat': False,
                     'instant_mode': False,
                     'num_close_matches': 3,
-                    'env': {'LC_ALL': 'C', 'LANG': 'C', 'GIT_TRACE': '1'}}
+                    'env': {'LC_ALL': 'C', 'LANG': 'C', 'GIT_TRACE': '1'},
+                    'excluded_search_path_prefixes': []}
 
 ENV_TO_ATTR = {'THEFUCK_RULES': 'rules',
                'THEFUCK_EXCLUDE_RULES': 'exclude_rules',
@@ -58,7 +59,8 @@ ENV_TO_ATTR = {'THEFUCK_RULES': 'rules',
                'THEFUCK_SLOW_COMMANDS': 'slow_commands',
                'THEFUCK_REPEAT': 'repeat',
                'THEFUCK_INSTANT_MODE': 'instant_mode',
-               'THEFUCK_NUM_CLOSE_MATCHES': 'num_close_matches'}
+               'THEFUCK_NUM_CLOSE_MATCHES': 'num_close_matches',
+               'THEFUCK_EXCLUDED_SEARCH_PATH_PREFIXES': 'excluded_search_path_prefixes'}
 
 SETTINGS_HEADER = u"""# The Fuck settings file
 #

thefuck/utils.py

@@ -104,6 +104,13 @@ def get_close_matches(word, possibilities, n=None, cutoff=0.6):
     return difflib_get_close_matches(word, possibilities, n, cutoff)
 
 
+def include_path_in_search(path):
+    for exclude_path in settings.excluded_search_path_prefixes:
+        if path.startswith(exclude_path):
+            return False
+    return True
+
+
 @memoize
 def get_all_executables():
     from thefuck.shells import shell
@@ -118,7 +125,7 @@ def get_all_executables():
     tf_entry_points = ['thefuck', 'fuck']
 
     bins = [exe.name.decode('utf8') if six.PY2 else exe.name
-            for path in os.environ.get('PATH', '').split(os.pathsep)
+            for path in os.environ.get('PATH', '').split(os.pathsep) if include_path_in_search(path)
             for exe in _safe(lambda: list(Path(path).iterdir()), [])
             if not _safe(exe.is_dir, True)
             and exe.name not in tf_entry_points]