Add terraform 'no command' rule (#1317)

* Add terraform 'no command' rule

* Feedback from PR

Co-authored-by: Joseph Daniel <jdn@logpoint.com>

README.md

@@ -332,6 +332,7 @@ following rules are enabled by default:
 * `switch_lang` – switches command from your local layout to en;
 * `systemctl` – correctly orders parameters of confusing `systemctl`;
 * `terraform_init.py` – run `terraform init` before plan or apply;
+* `terraform_no_command.py` – fixes unrecognized `terraform` commands;
 * `test.py` – runs `py.test` instead of `test.py`;
 * `touch` – creates missing directories before "touching";
 * `tsuru_login` – runs `tsuru login` if not authenticated or session expired;

tests/rules/test_terraform_no_command.py

@@ -0,0 +1,27 @@
+import pytest
+from thefuck.rules.terraform_no_command import match, get_new_command
+from thefuck.types import Command
+
+
+@pytest.mark.parametrize('script, output', [
+    ('terraform appyl', 'Terraform has no command named "appyl". Did you mean "apply"?'),
+    ('terraform destory', 'Terraform has no command named "destory". Did you mean "destroy"?')])
+def test_match(script, output):
+    assert match(Command(script, output))
+
+
+@pytest.mark.parametrize('script, output', [
+    ('terraform --version', 'Terraform v0.12.2'),
+    ('terraform plan', 'No changes. Infrastructure is up-to-date.'),
+    ('terraform apply', 'Apply complete! Resources: 0 added, 0 changed, 0 destroyed.'),
+])
+def test_not_match(script, output):
+    assert not match(Command(script, output))
+
+
+@pytest.mark.parametrize('script, output, new_command', [
+    ('terraform appyl', 'Terraform has no command named "appyl". Did you mean "apply"?', 'terraform apply',),
+    ('terraform destory --some-other-option', 'Terraform has no command named "destory". Did you mean "destroy"?', 'terraform destroy --some-other-option',),
+])
+def test_get_new_command(script, output, new_command):
+    assert get_new_command(Command(script, output)) == new_command

thefuck/rules/terraform_no_command.py

@@ -0,0 +1,16 @@
+import re
+from thefuck.utils import for_app
+
+MISTAKE = r'(?<=Terraform has no command named ")([^"]+)(?="\.)'
+FIX = r'(?<=Did you mean ")([^"]+)(?="\?)'
+
+
+@for_app('terraform')
+def match(command):
+    return re.search(MISTAKE, command.output) and re.search(FIX, command.output)
+
+
+def get_new_command(command):
+    mistake = re.search(MISTAKE, command.output).group(0)
+    fix = re.search(FIX, command.output).group(0)
+    return command.script.replace(mistake, fix)