Support PBS free-threaded install_only(_stripped).

CHANGES.md

@@ -1,5 +1,12 @@
 # Release Notes
 
+## 2.97.0
+
+This release adds support for using `--scie-pbs-stripped` in combination with
+`--scie-pbs-free-threaded`.
+
+* Support PBS free-threaded `install_only(_stripped)`. (#3197)
+
 ## 2.96.2
 
 This release fixes `--scie-only` for foreign platforms.

pex/scie/__init__.py

@@ -361,8 +361,7 @@ def register_options(
         help=(
             "Should the Python Standalone Builds CPython distributions be free-threaded. If left "
             "unspecified or otherwise turned off, creating a scie from a PEX with free-threaded "
-            "abi wheels will automatically turn this option on. Note that this option is not "
-            "compatible with `--scie-pbs-stripped`."
+            "abi wheels will automatically turn this option on."
         ),
     )
     parser.add_argument(
@@ -388,7 +387,7 @@ def register_options(
             "Should the Python Standalone Builds CPython distributions used be stripped of debug "
             "symbols or not. For Linux and Windows particularly, the stripped distributions are "
             "less than half the size of the distributions that ship with debug symbols. Note that "
-            "this option is not compatible with `--scie-pbs-free-threaded` or `--scie-pbs-debug`."
+            "this option is not compatible with `--scie-pbs-debug`."
         ),
     )
     parser.add_argument(
@@ -588,10 +587,9 @@ def extract_options(options):
                 )
             )
 
-    if options.scie_pbs_stripped and (options.scie_pbs_free_threaded or options.scie_pbs_debug):
+    if options.scie_pbs_stripped and options.scie_pbs_debug:
         raise ValueError(
-            "Python Standalone Builds does not release stripped distributions for debug or "
-            "free-threaded builds."
+            "Python Standalone Builds does not release stripped distributions for debug builds."
         )
 
     science_binary = None  # type: Optional[Union[File, Url]]

pex/scie/science.py

@@ -7,6 +7,7 @@
 import re
 import shutil
 import subprocess
+import time
 from collections import OrderedDict
 from subprocess import CalledProcessError
 
@@ -69,7 +70,7 @@ def qualified_binary_name(self, binary_name):
 
 
 SCIENCE_RELEASES_URL = "https://github.com/a-scie/lift/releases"
-MIN_SCIENCE_VERSION = Version("0.18.1")
+MIN_SCIENCE_VERSION = Version("0.19.0")
 SCIENCE_REQUIREMENT = SpecifierSet("~={min_version}".format(min_version=MIN_SCIENCE_VERSION))
 
 
@@ -441,9 +442,20 @@ def configuration_binding(
             interpreter_config["base_url"] = "/".join(
                 (configuration.options.assets_base_url, "providers", str(interpreter.provider))
             )
-        if Provider.PythonBuildStandalone is interpreter.provider and not (
-            configuration.options.pbs_debug or pbs_free_threaded
+
+        install_only_available = Provider.PythonBuildStandalone is interpreter.provider
+        if install_only_available and configuration.options.pbs_debug:
+            install_only_available = False
+        if (
+            install_only_available
+            and pbs_free_threaded
+            and interpreter.release
+            and time.strptime(interpreter.release, "%Y%m%d") < time.strptime("20260320", "%Y%m%d")
         ):
+            # N.B.: Builds for free-threaded gained install_only & install_only_stripped flavors as
+            # of https://github.com/astral-sh/python-build-standalone/releases/tag/20260320
+            install_only_available = False
+        if install_only_available:
             interpreter_config.update(
                 flavor=(
                     "install_only_stripped"

pex/version.py

@@ -1,4 +1,4 @@
 # Copyright 2015 Pex project contributors.
 # Licensed under the Apache License, Version 2.0 (see LICENSE).
 
-__version__ = "2.96.2"
+__version__ = "2.97.0"

tests/integration/scie/test_pex_scie.py

@@ -350,7 +350,7 @@ def test_specified_science_binary(tmpdir):
 
     local_science_binary = os.path.join(str(tmpdir), "science")
     with open(local_science_binary, "wb") as write_fp, URLFetcher().get_body_stream(
-        "https://github.com/a-scie/lift/releases/download/v0.18.1/{binary}".format(
+        "https://github.com/a-scie/lift/releases/download/v0.19.0/{binary}".format(
             binary=SysPlatform.CURRENT.qualified_binary_name("science")
         )
     ) as read_fp:
@@ -394,7 +394,7 @@ def test_specified_science_binary(tmpdir):
         cached_science_binaries
     ), "Expected the local science binary to be used but not cached."
     assert (
-        "0.18.1"
+        "0.19.0"
         == subprocess.check_output(args=[local_science_binary, "--version"]).decode("utf-8").strip()
     )
 
@@ -1349,14 +1349,26 @@ def test_free_threaded_scie_auto_detected(tmpdir):
             "eager",
             "--scie-only",
             "--scie-pbs-free-threaded",
+            # N.B.: Exercise selection of old free-threaded -full builds.
+            "--scie-pbs-release",
+            "20260310",
             "-o",
             free_threaded_python,
         ]
     ).assert_success()
 
     scie = tmpdir.join("scie")
     run_pex_command(
-        args=["--scie", "eager", "psutil", "--scie-only", "-o", scie],
+        args=[
+            "--scie",
+            "eager",
+            "psutil",
+            "--scie-only",
+            # N.B.: Exercise selection of newer free-threaded install_only(_stripped) builds.
+            "--scie-pbs-stripped",
+            "-o",
+            scie,
+        ],
         python=free_threaded_python,
         use_pex_whl_venv=False,
     ).assert_success()