Use .python-version-default as default (#58)

To leave .python-version for the user

.github/CONTRIBUTING.md

@@ -35,14 +35,18 @@ You can (and should) run our test suite using [*tox*].
 However, you’ll probably want a more traditional environment as well.
 
 First, create a virtual environment so you don't break your system-wide Python installation.
-We recommend using the Python version from the `.python-version` file in project's root directory.
+We recommend using the Python version from the `.python-version-default` file in project's root directory.
 
 If you're using [*direnv*](https://direnv.net), you can automate the creation of a virtual environment with the correct Python version by adding the following `.envrc` to the project root after cloning the repository:
 
 ```bash
-layout python python$(cat .python-version)
+layout python python$(cat .python-version-default)
 ```
 
+ If you're using tools that understand `.python-version` files like [*pyenv*](https://github.com/pyenv/pyenv) does, you can make it a link to the `.python-version-default` file.
+
+---
+
 [Create a fork](https://github.com/pyca/service-identity/fork) of the *service-identity* repository and clone it:
 
 ```console

.github/workflows/ci.yml

@@ -14,8 +14,6 @@ env:
   FORCE_COLOR: "1"  # Make tools pretty.
   PIP_DISABLE_PIP_VERSION_CHECK: "1"
   PIP_NO_PYTHON_VERSION_WARNING: "1"
-  # N.B. default Python version for setup-python comes from the .python-version
-  # file at the root of the project.
 
 
 jobs:
@@ -26,6 +24,7 @@ jobs:
       - uses: "actions/checkout@v3"
       - uses: "actions/setup-python@v4"
         with:
+          python-version-file: .python-version-default
           cache: pip
 
       - name: Install & run tox
@@ -87,6 +86,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
+          python-version-file: .python-version-default
           cache: pip
 
       - uses: actions/download-artifact@v3
@@ -121,6 +121,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
+          python-version-file: .python-version-default
           cache: pip
 
       - name: Install & run tox
@@ -140,6 +141,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
+          python-version-file: .python-version-default
           cache: pip
 
       - name: Install in dev mode & import

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 ---
 default_language_version:
-  # keep in-sync with .python-version
+  # keep in-sync with .python-version-default
   python: python3.11
 
 repos:

tox.ini

@@ -54,7 +54,7 @@ commands =
 
 
 [testenv:coverage-report]
-# keep in-sync with .python-version
+# keep in-sync with .python-version-default
 base_python = py311
 deps = coverage[toml]>=5.0.2
 skip_install = true