Update python-build-standalone, now supporting Python 3.12.9 (default) and 3.13.2

We sue 3.12.9 by default since version 3.13.2 currently fails on `python -m ensurepip`.

Author: touilleMan

meson.build

@@ -204,13 +204,18 @@ if build_machine.system() == 'linux'
     mm = '@0@.@1@'.format(cpython_distrib_version_major, cpython_distrib_version_minor)
     bad_links = [
         # (<parent dir>, <symlink name>, <target name>)
-        ['bin', '2to3', '2to3-@0@'.format(mm)],
         ['bin', 'idle3', 'idle@0@'.format(mm)],
         ['bin', 'pydoc3', 'pydoc@0@'.format(mm)],
         ['bin', 'python3', 'python@0@'.format(mm)],
         ['bin', 'python3-config', 'python@0@-config'.format(mm)],
         ['lib', 'libpython@0@.so'.format(mm), 'libpython@0@.so.1.0'.format(mm)],
     ]
+    # 2to3 was removed in Python 3.13
+    if cpython_distrib_version_minor.to_int() < 13
+        bad_links += [
+            ['bin', '2to3', '2to3-@0@'.format(mm)],
+        ]
+    endif
     foreach x: bad_links
         parent_dir = x[0]
         symlink_name = x[1]

meson_options.txt

@@ -1,4 +1,4 @@
-option('cpython_distrib_version', type: 'string', value: '3.12.4', description: 'Version of CPython to ship')
+option('cpython_distrib_version', type: 'string', value: '3.12.9', description: 'Version of CPython to ship')
 option('gdextension_path', type: 'string', value: '', description: 'Use GDExtension API at this location instead of generating it from Godot binary')
 option('godot_version', type: 'string', value: '4.2.2', description: 'Version of Godot to generate GDExtension API from')
 option('real_is_double', type: 'boolean', value: false, description: 'Built for Godot with 64bits floating point numbers (i.e. double) in builtins instead of 32bits (i.e. float)')

scripts/python_distrib.py

@@ -2,6 +2,7 @@
 
 import argparse
 from pathlib import Path
+import re
 from urllib.request import urlopen
 import shutil
 import tarfile
@@ -10,8 +11,20 @@
 import zstandard
 
 
-PREBUILDS_BASE_URL = "https://github.com/indygreg/python-build-standalone/releases/download"
+PREBUILDS_BASE_URL = "https://github.com/astral-sh/python-build-standalone/releases/download"
 PLATFORM_TO_PREBUILDS = {
+    "3.13.2": {
+        "linux-x86_64": f"{PREBUILDS_BASE_URL}/20250205/cpython-3.13.2+20250205-x86_64_v3-unknown-linux-gnu-pgo+lto-full.tar.zst",
+        "windows-x86": f"{PREBUILDS_BASE_URL}/20250205/cpython-3.13.2+20250205-i686-pc-windows-msvc-shared-pgo-full.tar.zst",
+        "windows-x86_64": f"{PREBUILDS_BASE_URL}/20250205/cpython-3.13.2+20250205-x86_64-pc-windows-msvc-shared-pgo-full.tar.zst",
+        "macos-x86_64": f"{PREBUILDS_BASE_URL}/20250205/cpython-3.13.2+20250205-x86_64-apple-darwin-pgo+lto-full.tar.zst",
+    },
+    "3.12.9": {
+        "linux-x86_64": f"{PREBUILDS_BASE_URL}/20250205/cpython-3.12.9+20250205-x86_64_v3-unknown-linux-gnu-pgo+lto-full.tar.zst",
+        "windows-x86": f"{PREBUILDS_BASE_URL}/20250205/cpython-3.12.9+20250205-i686-pc-windows-msvc-shared-pgo-full.tar.zst",
+        "windows-x86_64": f"{PREBUILDS_BASE_URL}/20250205/cpython-3.12.9+20250205-x86_64-pc-windows-msvc-shared-pgo-full.tar.zst",
+        "macos-x86_64": f"{PREBUILDS_BASE_URL}/20250205/cpython-3.12.9+20250205-x86_64-apple-darwin-pgo+lto-full.tar.zst",
+    },
     "3.12.4": {
         "linux-x86_64": f"{PREBUILDS_BASE_URL}/20240713/cpython-3.12.4+20240713-x86_64-unknown-linux-gnu-pgo+lto-full.tar.zst",
         "windows-x86": f"{PREBUILDS_BASE_URL}/20240713/cpython-3.12.4+20240713-i686-pc-windows-msvc-shared-pgo-full.tar.zst",
@@ -105,15 +118,19 @@ def _tar_extract(reader):
 
 def load_config(prebuild_dir: Path) -> dict:
     conf = json.loads((prebuild_dir / "python/PYTHON.json").read_text())
-    assert conf["version"] == "7"
+    assert conf["version"] in (
+        "7",
+        "8",
+    ), f"Unsupported PYTHON.json format version {conf['version']}"
     assert conf["libpython_link_mode"] == "shared"
     return conf
 
 
 def install_linux(conf: dict, build_dir: Path, prebuild_dir: Path, compressed_stdlib: bool) -> None:
     print(f"Create clean distribution {build_dir}...")
 
-    if conf["target_triple"] not in ("x86_64-unknown-linux-gnu", "x86-unknown-linux-gnu"):
+    # See https://gregoryszorc.com/docs/python-build-standalone/main/running.html#obtaining-distributions
+    if not re.match(r"^x86_64(|_v2|_v3|_v4)-unknown-linux-(gnu|musl)$", conf["target_triple"]):
         raise RuntimeError(f"Unexpected target_triple `{conf['target_triple']}`")
     major, minor = conf["python_major_minor_version"].split(".")