replace fill: parameter with logic to expand py3* glob syntax in envs

.github/workflows/test_tox.yml

@@ -68,14 +68,13 @@ jobs:
           posargs: 'PyPy'
       pytest: false
 
-  test_supported_pythons:
+  test_python_version_glob:
     uses: ./.github/workflows/tox.yml
     with:
       envs: |
         - linux: pep8
-        - linux: py3
-      fill: true
-      fill_platforms: linux,macos
+        - linux: py3*
+        - macos: py31*
       pytest: false
 
   test_libraries:

docs/source/tox.rst

@@ -86,6 +86,13 @@ environment.
 If the Python version includes a ``t`` suffix, such as ``py313t``, then
 a free-threaded Python interpreter will be used.
 
+Additionally, the Python version can include glob syntax (i.e. `py3*`) to expand into all supported versions of Python (respecting ``project.requires-python`` in ``pyproject.toml`` as conforming with PEP621).
+
+For example:
+- ``py*`` for all supported versions of Python (from https://endoflife.date)
+- ``py3*`` for all supported minor versions of Python 3
+- ``py31*`` for all supported versions of Python between ``3.10`` and ``3.20``
+
 libraries
 ^^^^^^^^^
 
@@ -544,71 +551,6 @@ same repository, or when using a non-standard project layout.
      envs: |
        - linux: py312
 
-fill
-^^^^
-
-Automatically add tox environments for each Python version currently supported
-by your package. The supported versions are determined by reading the
-``requires-python`` field from your package's ``pyproject.toml`` file
-(conforming to PEP 621) and cross-referencing with currently maintained Python
-versions from https://endoflife.date.
-
-Default is ``false``.
-
-.. code:: yaml
-
-   uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v2
-   with:
-     fill: true
-     envs: |
-       - linux: pep8
-         pytest: false
-
-In the above example, if your package's ``pyproject.toml`` specifies
-``requires-python = ">=3.10"``, and Python 3.10, 3.11, 3.12, and 3.13 are
-currently maintained, the workflow will automatically add ``py310``, ``py311``,
-``py312``, and ``py313`` environments on Linux in addition to the ``pep8``
-environment.
-
-fill_platforms
-^^^^^^^^^^^^^^
-
-Platforms to use when generating environments with ``fill``. This is a
-comma-separated list of platforms. Default is ``linux`` only.
-
-.. code:: yaml
-
-   uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v2
-   with:
-     fill: true
-     fill_platforms: linux,macos,windows
-     envs: |
-       - linux: pep8
-         pytest: false
-
-This will create tox environments for each supported Python version on all
-three platforms.
-
-fill_factors
-^^^^^^^^^^^^
-
-Tox factors to add to the automatically generated environments from ``fill``.
-This is a comma-separated list of factors. Default is none.
-
-.. code:: yaml
-
-   uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v2
-   with:
-     fill: true
-     fill_factors: test,cov
-     envs: |
-       - linux: pep8
-         pytest: false
-
-If your package supports Python 3.11 and 3.12, this will generate environments
-like ``py311-test-cov`` and ``py312-test-cov`` instead of just ``py311`` and
-``py312``.
-
 Secrets
 ~~~~~~~