Change build system

.github/workflows/python-gnocchiclient.yml

@@ -12,6 +12,7 @@ jobs:
       matrix:
         env:
           - docs-gnocchi-web
+          - build
           - pep8
           - py36
           - py38

.mergify.yml

@@ -2,6 +2,7 @@ queue_rules:
   - name: default
     conditions:
     - check-success=test (docs-gnocchi-web)
+    - check-success=test (build)
     - check-success=test (pep8)
     - check-success=test (py36)
     - check-success=test (py38)
@@ -17,6 +18,7 @@ pull_request_rules:
     - label!=work-in-progress
     - '#approved-reviews-by>=1'
     - check-success=test (docs-gnocchi-web)
+    - check-success=test (build)
     - check-success=test (pep8)
     - check-success=test (py36)
     - check-success=test (py38)

pyproject.toml

@@ -0,0 +1,5 @@
+[build-system]
+requires = ["setuptools", "setuptools_scm", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools_scm]

setup.py

@@ -13,17 +13,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools
 
-# In python < 2.7.4, a lazy loading of package `pbr` will break
-# setuptools if some other modules registered functions in `atexit`.
-# solution from: http://bugs.python.org/issue15881#msg170215
-try:
-    import multiprocessing  # noqa
-except ImportError:
-    pass
 
 setuptools.setup(
     setup_requires=['pbr'],
-    pbr=True)
+    pbr=True,
+    py_modules=[])

tox.ini

@@ -4,7 +4,10 @@ envlist = py36,py38,py39,pep8,docs-gnocchi-web
 skipsdist = True
 
 [testenv]
-basepython = python3
+basepython =
+   py36: {env:TOXPYTHON:python3.6}
+   py38: {env:TOXPYTHON:python3.8}
+   py39: {env:TOXPYTHON:python3.9}
 usedevelop = True
 setenv =
    VIRTUAL_ENV={envdir}
@@ -18,6 +21,11 @@ deps = .[test,openstack]
 # TODO(tobias-urdin): Skip benchmark tests since they just hang right now.
 commands = pifpaf run gnocchi -- pytest -k 'not test_benchmark_' {posargs:gnocchiclient/tests}
 
+[testenv:build]
+basepython = python3.8
+deps = build
+commands = python3 -m build
+
 [testenv:pep8]
 basepython = python3
 deps = flake8