build: Add bumpversion support

Add the ability to bump release numbers with "tox -e bumpversion -- patch" etc.

Author: fghaas

.bumpversion.cfg

@@ -0,0 +1,9 @@
+[bumpversion]
+commit = True
+current_version = 0.0.0
+message = build: Version {new_version}
+parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(rc(?P<rc>\d+))?
+serialize =  {major}.{minor}.{patch}
+tag = True
+
+[bumpversion:file:README.md]

README.md

@@ -13,7 +13,7 @@ This package provides no functionality of its own; it only installs dependencies
 To install directly from this repository, run:
 
 ```shell
-pip install git+https://github.com/cleura/cleura-openstack
+pip install git+https://github.com/cleura/cleura-openstack@v0.0.0
 ```
 
 Then, invoke the `openstack` command provided by the `python-openstackclient` package.

pyproject.toml

@@ -38,6 +38,9 @@ yamllint = [
 markdownlint = [
     "pymarkdownlnt",
 ]
+bumpversion = [
+    "bump2version",
+]
 
 
 [tool.tox]
@@ -73,6 +76,14 @@ dependency_groups = [
     "markdownlint",
 ]
 
+[tool.tox.env.bumpversion]
+skip_install = true
+description = "Increment the major, minor, or patch version indicator"
+commands = [["bump2version", "{posargs}"]]
+dependency_groups = [
+    "bumpversion",
+]
+
 [tool.flake8]
 max-line-length = 180
 statistics = true