#N/A: Add brew_cask_dependency rule

README.md

@@ -279,6 +279,7 @@ Enabled by default only on specific platforms:
 * `apt_get` – installs app from apt if it not installed (requires `python-commandnotfound` / `python3-commandnotfound`);
 * `apt_get_search` – changes trying to search using `apt-get` with searching using `apt-cache`;
 * `apt_invalid_operation` – fixes invalid `apt` and `apt-get` calls, like `apt-get isntall vim`;
+* `brew_cask_dependency` – installs cask dependencies;
 * `brew_install` – fixes formula name for `brew install`;
 * `brew_link` – adds `--overwrite --dry-run` if linking fails;
 * `brew_uninstall` – adds `--force` to `brew uninstall` if multiple versions were installed;

tests/rules/test_brew_cask_dependency.py

@@ -0,0 +1,35 @@
+import pytest
+from thefuck.rules.brew_cask_dependency import match, get_new_command
+from thefuck.types import Command
+
+
+output = '''sshfs: OsxfuseRequirement unsatisfied!
+
+You can install with Homebrew-Cask:
+  brew cask install osxfuse
+
+You can download from:
+  https://osxfuse.github.io/
+Error: An unsatisfied requirement failed this build.'''
+
+
+def test_match():
+    command = Command('brew install sshfs', output)
+    assert match(command)
+
+
+@pytest.mark.parametrize('script, output', [
+    ('brew link sshfs', output),
+    ('cat output', output),
+    ('brew install sshfs', '')])
+def test_not_match(script, output):
+    command = Command(script, output)
+    assert not match(command)
+
+
+@pytest.mark.parametrize('before, after', [
+    ('brew install sshfs',
+     'brew cask install osxfuse && brew install sshfs')])
+def test_get_new_command(before, after):
+    command = Command(before, output)
+    assert get_new_command(command) == after

thefuck/rules/brew_cask_dependency.py

@@ -0,0 +1,33 @@
+from thefuck.utils import for_app, eager
+from thefuck.shells import shell
+from thefuck.specific.brew import brew_available
+
+
+@for_app('brew')
+def match(command):
+    return (u'install' in command.script_parts
+            and u'brew cask install' in command.stderr)
+
+
+@eager
+def _get_cask_install_lines(output):
+    for line in output.split('\n'):
+        line = line.strip()
+        if line.startswith('brew cask install'):
+            yield line
+
+
+def _get_script_for_brew_cask(output):
+    cask_install_lines = _get_cask_install_lines(output)
+    if len(cask_install_lines) > 1:
+        return shell.and_(*cask_install_lines)
+    else:
+        return cask_install_lines[0]
+
+
+def get_new_command(command):
+    brew_cask_script = _get_script_for_brew_cask(command.output)
+    return shell.and_(brew_cask_script, command.script)
+
+
+enabled_by_default = brew_available