Restore official Python setup for 3.15 final

Use the existing pinned setup-python action now that its official catalog supplies CPython 3.15.0. Remove the temporary standalone provisioning action and its sparse-checkout entry while retaining interpreter outputs and requested versions.

Assisted-by: OpenAI Codex:model identifier unavailable

.github/actions/setup-python/action.yml

@@ -1,57 +0,0 @@
-name: Set up reference Python
-description: Install CPython from python-build-standalone with pip available.
-inputs:
-  python-version:
-    description: CPython version to install
-    default: "3.15.0"
-outputs:
-  python-path:
-    description: Path to the installed interpreter
-    value: ${{ steps.python.outputs.python-path }}
-  python-version:
-    description: Installed CPython version
-    value: ${{ steps.python.outputs.python-version }}
-runs:
-  using: composite
-  steps:
-    # uv 0.13.0 includes the final 3.15.0 builds, before setup-python's catalog.
-    - uses: astral-sh/setup-uv@1c37ad07a6a961277cf70c0d37d6f313000f5884 # v10.3.0
-      with:
-        version: "0.13.0"
-        python-version: ${{ inputs.python-version }}
-        activate-environment: true
-        no-project: true
-        venv-path: ${{ runner.temp }}/reference-python
-        enable-cache: false
-      env:
-        UV_VENV_SEED: "true"
-        UV_MANAGED_PYTHON: "true"
-    - id: python
-      shell: bash
-      env:
-        REQUESTED_PYTHON: ${{ inputs.python-version }}
-      run: |
-        python - <<'PY'
-        import os
-        import platform
-        import sys
-
-        if os.environ["REQUESTED_PYTHON"] == "3.15.0":
-            assert sys.version_info[:3] == (3, 15, 0), sys.version
-            assert sys.version_info.releaselevel == "final", sys.version
-        with open(os.environ["GITHUB_OUTPUT"], "a") as output:
-            print(f"python-path={sys.executable}", file=output)
-            print(f"python-version={platform.python_version()}", file=output)
-        with open(os.environ["GITHUB_ENV"], "a") as env:
-            print(f"pythonLocation={sys.base_prefix}", file=env)
-            if sys.platform == "linux":
-                lib = os.path.join(sys.base_prefix, "lib")
-                previous = os.environ.get("LD_LIBRARY_PATH")
-                lib_path = os.pathsep.join([lib, previous] if previous else [lib])
-                print(f"LD_LIBRARY_PATH={lib_path}", file=env)
-        if sys.platform == "win32":
-            with open(os.environ["GITHUB_PATH"], "a") as path:
-                print(sys.base_prefix, file=path)
-                print(os.path.dirname(sys.executable), file=path)
-        print(sys.version)
-        PY

.github/workflows/ci.yaml

@@ -539,7 +539,7 @@ jobs:
         # Windows runners randomly crashes, https://github.com/actions/cache/issues/1754
         continue-on-error: true
 
-      - uses: ./.github/actions/setup-python
+      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
 
       - name: Install macOS dependencies
         uses: ./.github/actions/install-macos-deps
@@ -752,7 +752,7 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: ./.github/actions/setup-python
+      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
 
       - uses: dtolnay/rust-toolchain@stable
         with:
@@ -914,7 +914,7 @@ jobs:
           mkdir geckodriver
           tar -xzf geckodriver-v0.36.0-linux64.tar.gz -C geckodriver
 
-      - uses: ./.github/actions/setup-python
+      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
 
       - run: python -m pip install -r requirements.txt
         working-directory: ./wasm/tests

.github/workflows/codspeed.yaml

@@ -49,7 +49,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
 
       # The benchmarks are linked against libpython through the pyo3 dev-dependency.
-      - uses: ./.github/actions/setup-python
+      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
 
       - name: Restore the machine main last measured on
         # A recording that cannot be fetched is read as "none yet", which the step

.github/workflows/cron-ci.yaml

@@ -37,7 +37,7 @@ jobs:
         with:
           tool: cargo-llvm-cov
 
-      - uses: ./.github/actions/setup-python
+      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
 
       - run: sudo apt-get update && sudo apt-get -y install lcov
 
@@ -110,7 +110,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@stable
 
-      - uses: ./.github/actions/setup-python
+      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
 
       - name: build rustpython
         run: cargo build --release --verbose --features sqlite
@@ -170,7 +170,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@stable
 
-      - uses: ./.github/actions/setup-python
+      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
 
       - run: cargo install cargo-criterion
 

.github/workflows/lib-deps-check.yaml

@@ -107,7 +107,7 @@ jobs:
 
       - name: Setup Python
         if: steps.changed-files.outputs.modules != ''
-        uses: ./.github/actions/setup-python
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
 
       - name: Run deps check
         if: steps.changed-files.outputs.modules != ''

.github/workflows/pyperformance.yaml

@@ -60,7 +60,7 @@ jobs:
       # Both the third interpreter under test and the host pyperformance
       # itself runs on (it only runs under a real CPython; RustPython is just
       # the `--python` target it drives).
-      - uses: ./.github/actions/setup-python
+      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         id: cpython
         with:
           python-version: "3.15.0"

.github/workflows/update-doc-db.yml

@@ -35,9 +35,8 @@ jobs:
           persist-credentials: false
           sparse-checkout: |
             crates/doc
-            .github/actions/setup-python
 
-      - uses: ./.github/actions/setup-python
+      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
           python-version: ${{ inputs.python-version }}