Enable progressive mode with ansible-lint

Makes use of newer feature which produces failures only when current
commit is adding new violations, exiting ones being considered
as already known.

To prove it works, it also removes the E208 from warn, making it
an error. Still, the final linting result is a success because
these violations were already present before current commit.

Change-Id: Ia858f2a3e71d9634e9d90e890d82714105e8f8c9

.ansible-lint

@@ -5,13 +5,8 @@ quiet: false
 skip_list:
   - '106'  # Role name does not match ``^[a-z][a-z0-9_]+$`` pattern
   - '204'  # Lines should be no longer than 160 chars
-           # TODO(AJaeger): E208 gives false positives currently, we
-           # should enable it once all issues in zuul-jobs and
-           # ansible-lint are fixed.
   - '301'  # Commands should not change things if nothing needs doing
   - '701'  # No 'galaxy_info' found
-warn_list:
-  - '208'  # File permissions not mentioned
 rulesdir:
   - ./.rules/
 use_default_rules: true

.gitignore

@@ -13,3 +13,4 @@ doc/build
 AUTHORS
 ChangeLog
 dist
+.cache

linters-requirements.txt

@@ -2,4 +2,4 @@
 # conflict, like ansible version required by ansible-lint.
 flake8
 yamllint>=1.23.0
-ansible-lint>=4.3.4,<5
+ansible-lint>=4.3.7,<5

tox.ini

@@ -48,7 +48,7 @@ commands =
   flake8 {posargs}
   yamllint -s -f parsable .
   python -m ansiblelint --version
-  python -m ansiblelint {env:ANSIBLELINT_OPTS:}
+  python -m ansiblelint {env:ANSIBLELINT_OPTS:--progressive}
   # Ansible Syntax Check
   bash -c "find playbooks -type f -regex '.*.ya?ml' ! -regex '.*vars\/.*' -exec \
     ansible-playbook --syntax-check -i {toxinidir}/tests/inventory \{\} + > /dev/null"
@@ -70,6 +70,7 @@ commands = {posargs}
 ignore = E124,E125,E129,E252,E402,E741,W503,W504,H
 show-source = True
 exclude =
+  .cache,
   .venv,
   .tox,
   dist,