Use pre-commit to run pep8 checks

Change-Id: I930854d3304fe7b87d2393034fe54ca5d42dc0d4

.pre-commit-config.yaml

@@ -0,0 +1,25 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v5.0.0
+    hooks:
+      - id: trailing-whitespace
+      # Replaces or checks mixed line ending
+      - id: mixed-line-ending
+        args: ['--fix', 'lf']
+        exclude: '.*\.(svg)$'
+      # Forbid files which have a UTF-8 byte-order marker
+      - id: check-byte-order-marker
+      # Checks that non-binary executables have a proper shebang
+      - id: check-executables-have-shebangs
+      # Check for files that contain merge conflict strings.
+      - id: check-merge-conflict
+      # Check for debugger imports and py37+ breakpoint()
+      # calls in python source
+      - id: debug-statements
+      - id: check-yaml
+        files: .*\.(yaml|yml)$
+  - repo: https://opendev.org/openstack/hacking
+    rev: 7.0.0
+    hooks:
+      - id: hacking
+        additional_dependencies: []

doc/source/conf.py

@@ -22,7 +22,7 @@ sys.path.insert(0, os.path.abspath('../..'))
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = [
     'sphinx.ext.autodoc',
-    #'sphinx.ext.intersphinx',
+    # 'sphinx.ext.intersphinx',
     'openstackdocstheme'
 ]
 
@@ -74,7 +74,7 @@ latex_documents = [
 ]
 
 # Example configuration for intersphinx: refer to the Python standard library.
-#intersphinx_mapping = {'http://docs.python.org/': None}
+# intersphinx_mapping = {'http://docs.python.org/': None}
 
 # openstackdocstheme options
 openstackdocs_repo_name = 'openstack/ceilometermiddleware'

tox.ini

@@ -16,8 +16,11 @@ deps =
 commands = stestr run --slowest {posargs}
 
 [testenv:pep8]
-deps = hacking>=6.1.0,<6.2.0
-commands = flake8
+skip_install = true
+deps =
+  pre-commit
+commands =
+  pre-commit run -a
 
 [testenv:venv]
 commands = {posargs}