Drop support for old Django versions (#912)

Author: adamchainz

CONTRIBUTING.rst

@@ -101,27 +101,12 @@ Ready to contribute? Here's how to set up Django-MySQL for local development.
    If you want to use a different user or add a password, you can patch the
    settings file in your local install.
 
-5. Install ``tox`` and run the tests for Python 3.8 + Django 3.0:
+5. Install ``tox`` and run the tests for Python 3.10 + Django 4.0:
 
    .. code-block:: sh
 
        $ python -m pip install tox
-       $ tox -e py38-django30
-
-   The ``tox.ini`` file defines a large number of test environments, for
-   different Python and Django versions, plus for checking codestyle. During
-   development of a feature/fix, you'll probably want to run just one plus the
-   relevant codestyle:
-
-   .. code-block:: sh
-
-       $ tox -e py38-codestyle,py38-django30
-
-   You can run all the environments to check your code is okay for them with:
-
-   .. code-block:: sh
-
-       $ tox
+       $ tox -e py310-django40
 
 6. To make changes, create a branch for local development:
 

HISTORY.rst

@@ -2,6 +2,8 @@
 History
 =======
 
+* Drop support for Django 2.2, 3.0, and 3.1.
+
 * Support MariaDB 10.7.
 
 4.5.0 (2022-01-23)

requirements/compile.py

@@ -19,48 +19,6 @@
     ] + sys.argv[1:]
     # mysqlclient requirements found on each version's "Databases" documentation page:
     # https://docs.djangoproject.com/en/3.0/ref/databases/#mysql-db-api-drivers
-    subprocess.run(
-        [
-            "python3.7",
-            *common_args,
-            "-P",
-            "Django>=2.2,<2.3",
-            "-P",
-            "mysqlclient>=1.3.13",
-            "-o",
-            "py37-django22.txt",
-        ],
-        check=True,
-        capture_output=True,
-    )
-    subprocess.run(
-        [
-            "python3.7",
-            *common_args,
-            "-P",
-            "Django>=3.0a1,<3.1",
-            "-P",
-            "mysqlclient>=1.3.13",
-            "-o",
-            "py37-django30.txt",
-        ],
-        check=True,
-        capture_output=True,
-    )
-    subprocess.run(
-        [
-            "python3.7",
-            *common_args,
-            "-P",
-            "Django>=3.1a1,<3.2",
-            "-P",
-            "mysqlclient>=1.4.0",
-            "-o",
-            "py37-django31.txt",
-        ],
-        check=True,
-        capture_output=True,
-    )
     subprocess.run(
         [
             "python3.7",
@@ -75,48 +33,6 @@
         check=True,
         capture_output=True,
     )
-    subprocess.run(
-        [
-            "python3.8",
-            *common_args,
-            "-P",
-            "Django>=2.2,<2.3",
-            "-P",
-            "mysqlclient>=1.3.13",
-            "-o",
-            "py38-django22.txt",
-        ],
-        check=True,
-        capture_output=True,
-    )
-    subprocess.run(
-        [
-            "python3.8",
-            *common_args,
-            "-P",
-            "Django>=3.0a1,<3.1",
-            "-P",
-            "mysqlclient>=1.3.13",
-            "-o",
-            "py38-django30.txt",
-        ],
-        check=True,
-        capture_output=True,
-    )
-    subprocess.run(
-        [
-            "python3.8",
-            *common_args,
-            "-P",
-            "Django>=3.1a1,<3.2",
-            "-P",
-            "mysqlclient>=1.4.0",
-            "-o",
-            "py38-django31.txt",
-        ],
-        check=True,
-        capture_output=True,
-    )
     subprocess.run(
         [
             "python3.8",
@@ -145,48 +61,6 @@
         check=True,
         capture_output=True,
     )
-    subprocess.run(
-        [
-            "python3.9",
-            *common_args,
-            "-P",
-            "Django>=2.2,<2.3",
-            "-P",
-            "mysqlclient>=1.3.13",
-            "-o",
-            "py39-django22.txt",
-        ],
-        check=True,
-        capture_output=True,
-    )
-    subprocess.run(
-        [
-            "python3.9",
-            *common_args,
-            "-P",
-            "Django>=3.0a1,<3.1",
-            "-P",
-            "mysqlclient>=1.3.13",
-            "-o",
-            "py39-django30.txt",
-        ],
-        check=True,
-        capture_output=True,
-    )
-    subprocess.run(
-        [
-            "python3.9",
-            *common_args,
-            "-P",
-            "Django>=3.1a1,<3.2",
-            "-P",
-            "mysqlclient>=1.4.0",
-            "-o",
-            "py39-django31.txt",
-        ],
-        check=True,
-        capture_output=True,
-    )
     subprocess.run(
         [
             "python3.9",