Merge branch 'main' into free-threading-glossary

Author: lysnikolaou

.devcontainer/wasi/devcontainer.json

@@ -0,0 +1,73 @@
+{
+    "image": "ghcr.io/python/wasicontainer:latest",
+    "onCreateCommand": [
+        // Install common tooling.
+        "dnf",
+        "install",
+        "-y",
+        // For umask fix below.
+        "/usr/bin/setfacl"
+    ],
+    "updateContentCommand": {
+        // Using the shell for `nproc` usage.
+        "python": "python3 Tools/wasm/wasi build --quiet -- --with-pydebug -C"
+    },
+    "postCreateCommand": {
+        // https://github.com/orgs/community/discussions/26026
+        "umask fix: workspace": ["sudo", "setfacl", "-bnR", "."],
+        "umask fix: /tmp": ["sudo", "setfacl", "-bnR", "/tmp"]
+    },
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                // Highlighting for Parser/Python.asdl.
+                "brettcannon.zephyr-asdl",
+                // Highlighting for configure.ac.
+                "maelvalais.autoconf",
+                // C auto-complete.
+                "ms-vscode.cpptools",
+                // Python auto-complete.
+                "ms-python.python"
+            ],
+            "settings": {
+                "C_Cpp.default.compilerPath": "/usr/bin/clang",
+                "C_Cpp.default.cStandard": "c11",
+                "C_Cpp.default.defines": [
+                    "CONFIG_64",
+                    "Py_BUILD_CORE"
+                ],
+                "C_Cpp.default.includePath": [
+                    "${workspaceFolder}/*",
+                    "${workspaceFolder}/Include/**"
+                ],
+                // https://github.com/microsoft/vscode-cpptools/issues/10732
+                "C_Cpp.errorSquiggles": "disabled",
+                "editor.insertSpaces": true,
+                "editor.rulers": [
+                    80
+                ],
+                "editor.tabSize": 4,
+                "editor.trimAutoWhitespace": true,
+                "files.associations": {
+                    "*.h": "c"
+                },
+                "files.encoding": "utf8",
+                "files.eol": "\n",
+                "files.insertFinalNewline": true,
+                "files.trimTrailingWhitespace": true,
+                "python.analysis.diagnosticSeverityOverrides": {
+                    // Complains about shadowing the stdlib w/ the stdlib.
+                    "reportShadowedImports": "none",
+                    // Doesn't like _frozen_importlib.
+                    "reportMissingImports": "none"
+                },
+                "python.analysis.extraPaths": [
+                    "Lib"
+                ],
+                "[restructuredtext]": {
+                    "editor.tabSize": 3
+                }
+            }
+        }
+    }
+}

.gitattributes

@@ -83,6 +83,7 @@ Include/opcode_ids.h                                generated
 Include/token.h                                     generated
 Lib/_opcode_metadata.py                             generated
 Lib/keyword.py                                      generated
+Lib/idlelib/help.html                               generated
 Lib/test/certdata/*.pem                             generated
 Lib/test/certdata/*.0                               generated
 Lib/test/levenshtein_examples.json                  generated

.github/CODEOWNERS

@@ -126,6 +126,9 @@ Doc/howto/clinic.rst          @erlend-aasland @AA-Turner
 # C Analyser
 Tools/c-analyzer/             @ericsnowcurrently
 
+# C API Documentation Checks
+Tools/check-c-api-docs/       @ZeroIntensity
+
 # Fuzzing
 Modules/_xxtestfuzz/          @ammaraskar
 

.github/CONTRIBUTING.rst

@@ -28,13 +28,12 @@ Please be aware that our workflow does deviate slightly from the typical GitHub
 project. Details on how to properly submit a pull request are covered in
 `Lifecycle of a Pull Request <https://devguide.python.org/getting-started/pull-request-lifecycle.html>`_.
 We utilize various bots and status checks to help with this, so do follow the
-comments they leave and their "Details" links, respectively. The key points of
-our workflow that are not covered by a bot or status check are:
+comments they leave and their "Details" links, respectively.
 
-- All discussions that are not directly related to the code in the pull request
-  should happen on `GitHub Issues <https://github.com/python/cpython/issues>`_.
-- Upon your first non-trivial pull request (which includes documentation changes),
-  feel free to add yourself to ``Misc/ACKS``.
+The final key part of our workflow is that all discussions that are not
+directly related to the code in the pull request should happen on
+`GitHub Issues <https://github.com/python/cpython/issues>`__, generally in the
+pull request's parent issue.
 
 
 Setting Expectations

.github/ISSUE_TEMPLATE/config.yml

@@ -5,3 +5,6 @@ contact_links:
   - name: "Proposing new features"
     about: "Submit major feature proposal (e.g. syntax changes) to an ideas forum first."
     url: "https://discuss.python.org/c/ideas/6"
+  - name: "Python Install Manager issues"
+    about: "Report issues with the Python Install Manager (for Windows)"
+    url: "https://github.com/python/pymanager/issues"

.github/dependabot.yml

@@ -12,10 +12,17 @@ updates:
         update-types:
           - "version-update:semver-minor"
           - "version-update:semver-patch"
+    cooldown:
+      # https://blog.yossarian.net/2025/11/21/We-should-all-be-using-dependency-cooldowns
+      # Cooldowns protect against supply chain attacks by avoiding the
+      # highest-risk window immediately after new releases.
+      default-days: 14
   - package-ecosystem: "pip"
     directory: "/Tools/"
     schedule:
       interval: "monthly"
     labels:
       - "skip issue"
       - "skip news"
+    cooldown:
+      default-days: 14

.github/workflows/build.yml

@@ -109,20 +109,10 @@ jobs:
           python-version: '3.x'
       - name: Runner image version
         run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-      - name: Restore config.cache
-        uses: actions/cache@v4
-        with:
-          path: config.cache
-          # Include env.pythonLocation in key to avoid changes in environment when setup-python updates Python
-          key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}-${{ env.pythonLocation }}
       - name: Install dependencies
         run: sudo ./.github/workflows/posix-deps-apt.sh
       - name: Add ccache to PATH
         run: echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-      - name: Configure ccache action
-        uses: hendrikmuhs/ccache-action@v1.2
-        with:
-          save: false
       - name: Configure CPython
         run: |
           # Build Python with the libpython dynamic library
@@ -152,6 +142,9 @@ jobs:
       - name: Check for unsupported C global variables
         if: github.event_name == 'pull_request'  # $GITHUB_EVENT_NAME
         run: make check-c-globals
+      - name: Check for undocumented C APIs
+        run: make check-c-api-docs
+
 
   build-windows:
     name: >-
@@ -215,7 +208,6 @@ jobs:
           free-threading: true
     uses: ./.github/workflows/reusable-macos.yml
     with:
-      config_hash: ${{ needs.build-context.outputs.config-hash }}
       free-threading: ${{ matrix.free-threading }}
       os: ${{ matrix.os }}
 
@@ -247,7 +239,6 @@ jobs:
           bolt: true
     uses: ./.github/workflows/reusable-ubuntu.yml
     with:
-      config_hash: ${{ needs.build-context.outputs.config-hash }}
       bolt-optimizations: ${{ matrix.bolt }}
       free-threading: ${{ matrix.free-threading }}
       os: ${{ matrix.os }}
@@ -278,11 +269,6 @@ jobs:
         persist-credentials: false
     - name: Runner image version
       run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: Restore config.cache
-      uses: actions/cache@v4
-      with:
-        path: config.cache
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
     - name: Register gcc problem matcher
       run: echo "::add-matcher::.github/problem-matchers/gcc.json"
     - name: Install dependencies
@@ -304,10 +290,6 @@ jobs:
     - name: Add ccache to PATH
       run: |
         echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: Configure ccache action
-      uses: hendrikmuhs/ccache-action@v1.2
-      with:
-        save: false
     - name: Configure CPython
       run: ./configure CFLAGS="-fdiagnostics-format=json" --config-cache --enable-slower-safety --with-pydebug --with-openssl="$OPENSSL_DIR"
     - name: Build CPython
@@ -339,11 +321,6 @@ jobs:
         persist-credentials: false
     - name: Runner image version
       run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: Restore config.cache
-      uses: actions/cache@v4
-      with:
-        path: config.cache
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
     - name: Register gcc problem matcher
       run: echo "::add-matcher::.github/problem-matchers/gcc.json"
     - name: Install dependencies
@@ -370,10 +347,6 @@ jobs:
     - name: Add ccache to PATH
       run: |
         echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: Configure ccache action
-      uses: hendrikmuhs/ccache-action@v1.2
-      with:
-        save: false
     - name: Configure CPython
       run: |
         ./configure CFLAGS="-fdiagnostics-format=json" \
@@ -414,13 +387,34 @@ jobs:
       - name: Build and test
         run: ./Android/android.py ci --fast-ci ${{ matrix.arch }}-linux-android
 
+  build-ios:
+    name: iOS
+    needs: build-context
+    if: needs.build-context.outputs.run-tests == 'true'
+    timeout-minutes: 60
+    runs-on: macos-15
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      # GitHub recommends explicitly selecting the desired Xcode version:
+      # https://github.com/actions/runner-images/issues/12541#issuecomment-3083850140
+      # This became a necessity as a result of
+      # https://github.com/actions/runner-images/issues/12541 and
+      # https://github.com/actions/runner-images/issues/12751.
+      - name: Select Xcode version
+        run: |
+          sudo xcode-select --switch /Applications/Xcode_16.4.app
+
+      - name: Build and test
+        run: python3 Apple ci iOS --fast-ci --simulator 'iPhone 16e,OS=18.5'
+
   build-wasi:
     name: 'WASI'
     needs: build-context
     if: needs.build-context.outputs.run-tests == 'true'
     uses: ./.github/workflows/reusable-wasi.yml
-    with:
-      config_hash: ${{ needs.build-context.outputs.config-hash }}
 
   test-hypothesis:
     name: "Hypothesis tests on Ubuntu"
@@ -456,10 +450,6 @@ jobs:
     - name: Add ccache to PATH
       run: |
         echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: Configure ccache action
-      uses: hendrikmuhs/ccache-action@v1.2
-      with:
-        save: false
     - name: Setup directory envs for out-of-tree builds
       run: |
         echo "CPYTHON_RO_SRCDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-ro-srcdir)" >> "$GITHUB_ENV"
@@ -470,11 +460,6 @@ jobs:
       run: sudo mount --bind -o ro "$GITHUB_WORKSPACE" "$CPYTHON_RO_SRCDIR"
     - name: Runner image version
       run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: Restore config.cache
-      uses: actions/cache@v4
-      with:
-        path: ${{ env.CPYTHON_BUILDDIR }}/config.cache
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
     - name: Configure CPython out-of-tree
       working-directory: ${{ env.CPYTHON_BUILDDIR }}
       run: |
@@ -558,11 +543,6 @@ jobs:
         persist-credentials: false
     - name: Runner image version
       run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: Restore config.cache
-      uses: actions/cache@v4
-      with:
-        path: config.cache
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
     - name: Register gcc problem matcher
       run: echo "::add-matcher::.github/problem-matchers/gcc.json"
     - name: Install dependencies
@@ -588,11 +568,6 @@ jobs:
     - name: Add ccache to PATH
       run: |
         echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: Configure ccache action
-      uses: hendrikmuhs/ccache-action@v1.2
-      with:
-        save: ${{ github.event_name == 'push' }}
-        max-size: "200M"
     - name: Configure CPython
       run: ./configure --config-cache --with-address-sanitizer --without-pymalloc
     - name: Build CPython
@@ -624,7 +599,6 @@ jobs:
     uses: ./.github/workflows/reusable-san.yml
     with:
       sanitizer: ${{ matrix.sanitizer }}
-      config_hash: ${{ needs.build-context.outputs.config-hash }}
       free-threading: ${{ matrix.free-threading }}
 
   cross-build-linux:
@@ -639,11 +613,6 @@ jobs:
           persist-credentials: false
       - name: Runner image version
         run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-      - name: Restore config.cache
-        uses: actions/cache@v4
-        with:
-          path: config.cache
-          key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
       - name: Register gcc problem matcher
         run: echo "::add-matcher::.github/problem-matchers/gcc.json"
       - name: Set build dir
@@ -723,6 +692,7 @@ jobs:
     - build-ubuntu-ssltests-awslc
     - build-ubuntu-ssltests-openssl
     - build-android
+    - build-ios
     - build-wasi
     - test-hypothesis
     - build-asan
@@ -759,6 +729,7 @@ jobs:
             build-ubuntu-ssltests-awslc,
             build-ubuntu-ssltests-openssl,
             build-android,
+            build-ios,
             build-wasi,
             test-hypothesis,
             build-asan,