Update ansible-lint execution

Updated ansible-lint to run via pre-commit only on ansible files.

Moved config file to its standard location, repository root, which
simplifies syncronization and usage.

Contains bumping ansible-lint to current version which also required
adding few more rule excludes. These excludes are going to be removed
one by one in follow-up changes. This gradual approach allow us to
improve code style without endless merge conflicts.

Config settings mostly based on those used by tripleo repos.

Bumping linters can now be done by running 'pre-commit autoupdate'.

Pro-commit always locks versions so there is no chance that a newer
linter (ansible-lint) would break CI.

Some documentation can be found at https://github.com/openstack/tripleo-quickstart/blob/master/doc/source/contributing.rst
and applies mostly to any project using pre-commit.

Co-Authored-By: Sorin Sbarnea <ssbarnea@redhat.com>
Change-Id: I05eb561c4e353b5fe0bc7c6d3ab2f8ea6c6ea2f4

.ansible-lint

@@ -0,0 +1,15 @@
+---
+parseable: true
+skip_list:
+  - '102'  # [E102] No Jinja2 in when
+  - '204'  # [E204] Lines should be no longer than 120 chars
+  - '206'  # [E206] Variables should have spaces before and after: {{ var_name }}
+  - '405'
+  - '503'  # [E503] Tasks that run when changed should likely be handlers
+  - '504'
+  - '601'  # [E601] Don't compare to literal True/False
+  - '602'  # [E602] Don't compare to empty string
+  - ANSIBLE0006
+  - ANSIBLE0007
+  - ANSIBLE0012
+use_default_rules: true

.pre-commit-config.yaml

@@ -0,0 +1,17 @@
+---
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.1.0
+    hooks:
+      - id: mixed-line-ending
+      - id: check-byte-order-marker
+      - id: check-executables-have-shebangs
+      - id: check-merge-conflict
+      - id: debug-statements
+  - repo: https://github.com/ansible/ansible-lint
+    rev: v4.0.1
+    hooks:
+      - id: ansible-lint
+        files: \.(yaml|yml)$
+        exclude: ^rally/
+        entry: ansible-lint --force-color -v

ansible/.ansible-lint

@@ -1,15 +0,0 @@
-exclude_paths:
-  - ./gather/
-parseable: true
-quiet: true
-skip_list:
-  - skip_ansible_lint
-  - '204'
-  - '206'
-  - '405'
-  - '504'
-  - '601'
-  - '602'
-  - ANSIBLE0012,ANSIBLE0006,ANSIBLE0007,ANSIBLE0016,ANSIBLE0019
-use_default_rules: true
-verbosity: 1

doc/source/contributing.rst

@@ -18,6 +18,9 @@ You can view your public key using:
 
     $ cat ~/.ssh/id_*.pub
 
+Setup
+`````
+
 Set your username and email for review.openstack.org:
 
 ::
@@ -26,6 +29,7 @@ Set your username and email for review.openstack.org:
     $ git config --global user.name "example"
     $ git config --global --add gitreview.username "example"
 
+
 Next, Clone the github repository:
 
 ::
@@ -45,6 +49,10 @@ To set up your cloned repository to work with OpenStack Gerrit
 
     $ git review -s
 
+
+Making changes
+``````````````
+
 It's useful to create a branch to do your work, name it something
 related to the change you'd like to introduce.
 
@@ -54,8 +62,7 @@ related to the change you'd like to introduce.
     $ git branch my_special_enhancement
     $ git checkout !$
 
-Make your changes and then commit them using the instructions
-below.
+Now you can make your changes and then commit.
 
 ::
 
@@ -66,6 +73,43 @@ Use a descriptive commit title followed by an empty space.
 You should type a small justification of what you are
 changing and why.
 
+Local testing
+`````````````
+
+Before submitting code to Gerrit you *should* do at least some minimal local
+testing, like running ``tox -e linters``. This could be automated if you
+activate `pre-commit <https://pre-commit.com/>`__ hooks::
+
+    pip install --user pre-commit
+    # to enable automatic run on commit:
+    pre-commit install --install-hooks
+    # to uninstall hooks
+    pre-commit uninstall
+
+Please note that the pre-commit feature is available only on repositories that
+do have `.pre-commit-config.yaml <https://github.com/openstack/browbeat/blob/master/.pre-commit-config.yaml>`__ file.
+
+Running ``tox -e linters`` is recommended as it may include additional linting
+commands than just pre-commit. So, if you run tox you don't need to run
+pre-commit manually.
+
+Implementation of pre-commit is very fast and saves a lot of disk space
+because internally it does cache any linter-version and reuses it between
+repositories, as opposed to tox which uses environments unique to each
+repository (usually more than one). Also by design pre-commit always pins
+linters, making less like to break code because linter released new version.
+
+Another reason why pre-commit is very fast is because it runs only
+on modified files. You can force it to run on the entire repository via
+`pre-commit run -a` command.
+
+Upgrading linters is done via ``pre-commit autoupdate`` but this should be
+done only as a separate change request.
+
+
+Submit Changes
+``````````````
+
 Now you're ready to submit your changes for review:
 
 ::
@@ -82,6 +126,9 @@ use the amend feature after further modification and saving.
     $ git commit --amend
     $ git review
 
+Changes to a review
+```````````````````
+
 If you want to submit a new patchset from a different location
 (perhaps on a different machine or computer for example) you can
 clone the Browbeat repo again (if it doesn't already exist) and then

test-requirements.txt

@@ -4,11 +4,12 @@
 
 hacking<0.11,>=0.10.0
 
-ansible-lint
 pykwalify
 coverage>=3.6
+pre-commit  # MIT
 pytest==3.2.1
 python-subunit>=0.0.18
+
 readme_renderer[md]
 sphinx>=1.3,!=1.6.1
 oslosphinx>=2.5.0 # Apache-2.0

tox.ini

@@ -18,9 +18,7 @@ whitelist_externals = bash
 extras = insights
 commands =
   {[testenv:pep8]commands}
-  bash -c "cd ansible; find . -type f -regex '.*.y[a]?ml' -print0 | xargs -t -n1 -0 \
-    ansible-lint" \
-    --exclude=rally
+  python -m pre_commit run -a
   pykwalify -d browbeat-config.yaml -s browbeat/schema/browbeat.yml
   pykwalify -d browbeat-complete.yaml -s browbeat/schema/browbeat.yml
   bash -c "set -e; for config in $(ls conf/); do \