[stable-only] Pin tox <4

Continue to use tox 3 in the stable branches.

Two changes:
- .zuul.yaml: set the ensure_tox_version to use <4, which will
  tell zuul to install tox<4 if it's not present
- tox.ini: set requires=tox<4 so that if tox has been installed
  already, our tox-based jobs will use tox 3 to run the tests

Change-Id: Ida6359ddebc59091f2f2dfc951950538793d0109
This commit is contained in:
Brian Rosmaita 2022-12-22 18:11:07 -05:00
parent ef4982cf64
commit a7dfaf4243
2 changed files with 3 additions and 0 deletions

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@ -1,4 +1,6 @@
- project:
vars:
ensure_tox_version: '<4'
templates:
- check-requirements
- lib-forward-testing-python3

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@ -1,5 +1,6 @@
[tox]
minversion = 3.18.0
requires = tox<4
skipsdist = True
# python runtimes: https://governance.openstack.org/tc/reference/runtimes/ussuri.html
envlist = py3,pep8