#N/A Add a new rule brew_update_formula

README.md

@@ -222,6 +222,7 @@ Enabled by default only on specific platforms:
 * `apt_invalid_operation` – fixes invalid `apt` and `apt-get` calls, like `apt-get isntall vim`;
 * `brew_install` – fixes formula name for `brew install`;
 * `brew_unknown_command` – fixes wrong brew commands, for example `brew docto/brew doctor`;
+* `brew_update_formula` &ndash; turns `brew update <formula>` into `brew upgrade <formula>`;
 * `brew_upgrade` &ndash; appends `--all` to `brew upgrade` as per Homebrew's new behaviour;
 * `pacman` &ndash; installs app with `pacman` if it is not installed (uses `yaourt` if available);
 * `pacman_not_found` &ndash; fixes package name with `pacman` or `yaourt`.

tests/rules/test_brew_update_formula.py

@@ -0,0 +1,30 @@
+import pytest
+from tests.utils import Command
+from thefuck.rules.brew_update_formula import get_new_command, match
+
+
+@pytest.fixture
+def stderr():
+    return ("Error: This command updates brew itself, and does not take formula"
+            " names.\nUse 'brew upgrade <formula>'.")
+
+
+@pytest.fixture
+def new_command(formula):
+    return 'brew upgrade {}'.format(formula)
+
+
+@pytest.mark.parametrize('script', ['brew update foo', 'brew update bar zap'])
+def test_match(stderr, script):
+    assert match(Command(script=script, stderr=stderr))
+
+
+@pytest.mark.parametrize('script', ['brew upgrade foo', 'brew update'])
+def test_not_match(script):
+    assert not match(Command(script=script, stderr=''))
+
+
+@pytest.mark.parametrize('script, formula, ', [
+    ('brew update foo', 'foo'), ('brew update bar zap', 'bar zap')])
+def test_get_new_command(stderr, new_command, script, formula):
+    assert get_new_command(Command(script=script, stderr=stderr)) == new_command

thefuck/rules/brew_update_formula.py

@@ -0,0 +1,12 @@
+from thefuck.utils import for_app
+
+
+@for_app('brew', at_least=2)
+def match(command):
+    return ('update' in command.script
+            and "Error: This command updates brew itself" in command.stderr
+            and "Use 'brew upgrade <formula>'" in command.stderr)
+
+
+def get_new_command(command):
+    return command.script.replace('update', 'upgrade')