Use pre-commit for 'pep8' tox target

This avoids some duplication.

Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
Change-Id: Id3fb0770ce128b34777418da3d33cc63a61c06ea

test-requirements.txt

@@ -1,11 +1,5 @@
-# The order of packages is significant, because pip processes them in the order
-# of appearance. Changing the order has an impact on the overall integration
-# process, which may cause wedges in the gate later.
-
-# hacking should be first
 hacking>=3.1.0,<3.2.0 # Apache-2.0
 
-bashate>=0.5.1 # Apache-2.0
 coverage>=5.2.1 # Apache-2.0
 ddt>=1.4.1 # MIT
 fixtures>=3.0.0 # Apache-2.0/BSD

tox.ini

@@ -35,7 +35,7 @@ allowlist_externals = rm
 [testenv:newnote]
 allowlist_externals = reno
 deps =
--c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
 commands = reno new {posargs}
 
@@ -43,27 +43,13 @@ commands = reno new {posargs}
 commands = oslo_debug_helper {posargs}
 
 [testenv:pep8]
+deps =
+  pre-commit
 allowlist_externals =
   {toxinidir}/tools/check_exec.py
   {toxinidir}/tools/check_logging.sh
-
-# Let's gate pep8 under py3 by default because the py3 checks are stricter.
 commands =
-  flake8 {posargs}
-  # Run bashate during pep8 runs to ensure violations are caught by
-  # the check and gate queues.
-  bashate -i E006,E042,E043 \
-         tools/enable-pre-commit-hook.sh \
-         contrib/ci/pre_test_hook.sh \
-         contrib/ci/post_test_hook.sh \
-         devstack/plugin.sh \
-         devstack/upgrade/from-mitaka/upgrade-manila \
-         devstack/upgrade/resources.sh \
-         devstack/upgrade/shutdown.sh \
-         devstack/upgrade/upgrade.sh \
-         tools/cover.sh \
-         tools/check_logging.sh \
-         tools/coding-checks.sh
+  pre-commit run --all-files --show-diff-on-failure
   {toxinidir}/tools/check_exec.py {toxinidir}/manila
   {toxinidir}/tools/check_logging.sh {toxinidir}/manila
 
@@ -89,8 +75,6 @@ deps =
 commands =
   rm -rf doc/build
   sphinx-build -W -b html doc/source doc/build/html
-  # Ignore D001 since we allow lines in excess of 79 characters.
-  doc8 --ignore D001 --ignore-path .tox --ignore-path doc/build --ignore-path manila.egg-info -e .txt -e .rst -e .inc
 allowlist_externals = rm
 
 [testenv:pdf-docs]