Use pre-commit for pep8 checks

pre-commit was introduced in several repos and is known to be useful.
It allows us to easily add more checks.

Change-Id: I8bfbd0abbf2ad825716331833fb6ab68a1e61dfd
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

.pre-commit-config.yaml

@@ -0,0 +1,20 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v6.0.0
+    hooks:
+      - id: trailing-whitespace
+      - id: mixed-line-ending
+        args: ['--fix', 'lf']
+        exclude: '.*\.(svg)$'
+      - id: fix-byte-order-marker
+      - id: check-executables-have-shebangs
+      - id: check-merge-conflict
+      - id: debug-statements
+      - id: check-yaml
+        files: .*\.(yaml|yml)$
+  - repo: https://opendev.org/openstack/hacking
+    rev: 7.0.0
+    hooks:
+      - id: hacking
+        additional_dependencies: []
+        exclude: '^(doc|releasenotes|tools)/.*$'

doc/source/command/queue.rst

@@ -108,7 +108,7 @@ openstack messaging queue set metadata
 
    usage: openstack messaging queue set metadata [-h] <queue_name> <queue_metadata>
 
-Set queue metadata.All the metadata of the queue will be replaced by 
+Set queue metadata.All the metadata of the queue will be replaced by
 queue_metadata.
 
 **Positional arguments:**

test-requirements.txt

@@ -1,6 +1,3 @@
-# Hacking already pins down pep8, pyflakes and flake8
-hacking>=6.1.0,<6.2.0 # Apache-2.0
-
 # Unit testing
 fixtures>=3.0.0 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT

tox.ini

@@ -17,7 +17,11 @@ commands = find . -type f -name "*.pyc" -delete
 allowlist_externals = find
 
 [testenv:pep8]
-commands = flake8
+skip_install = true
+deps =
+    pre-commit
+commands =
+    pre-commit run -a
 
 [testenv:cover]
 setenv = {[testenv]setenv}